Firefighting equipment

Abstract

To provide fire extinguishing equipment capable of improving economical efficiency.SOLUTION: Fire extinguishing equipment comprises: an ORC cycle configured to circulate extinguishant as a working medium, the ORC cycle including a condenser provided on the ORC cycle and liquefying gaseous extinguishant, the extinguishant in the form of a gas, a booster pump provided on a downstream side of the condenser on the ORC cycle and boosting the liquid extinguishant formed by liquefying the gaseous extinguishant in the condenser, a vaporizer provided on the downstream side of the booster pump on the ORC cycle and vaporizing the liquid extinguishant, and an expansion turbine provided on the downstream side of the vaporizer and the upstream side of the condenser on the OCR cycle and driven by the gaseous extinguishant formed by vaporizing the liquid extinguishant; and at least one extinguishant supply line extracting at least one of the liquid extinguishant and the gaseous extinguishant from the ORC cycle and delivering the same to at least one object under fire prevention measures.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to fire extinguishing equipment. [Background technology]

[0002] Conventional nitrogen gas fire extinguishing systems are equipped with multiple gas cylinders that store nitrogen gas, and when a fire occurs, the nitrogen gas supplied from the gas cylinders is released to extinguish the fire due to oxygen deficiency. This nitrogen gas fire extinguishing system requires an occupied space to store the multiple gas cylinders. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 157029 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, fire extinguishing agents that can be stored in a liquid state and can extinguish fires by cooling them have become available on the market, but these agents have a problem in that their introduction costs are higher than those of nitrogen gas, and they have not become widely used. In other words, the economic viability of fire extinguishing equipment is an issue.

[0005] Patent Document 1 discloses that a refrigeration cycle circulates a mixed refrigerant containing a fire-extinguishing refrigerant and a flammable refrigerant, and that a refrigerant excluding the flammable refrigerant is sprayed in the event of a fire. The refrigeration cycle circulating the mixed refrigerant described in Patent Document 1 has a significantly different configuration from an ORC cycle (organic Rankine cycle) circulating a single medium. Furthermore, the invention described in Patent Document 1 does not contribute to improving economic efficiency, which is the objective of the present disclosure.

[0006] In view of the above circumstances, at least one embodiment of the present invention aims to provide a fire extinguishing system that can improve economic efficiency. [Means for solving the problem]

[0007] At least one embodiment of the fire extinguishing equipment of the present invention includes: An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; and an ORC cycle including and at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and delivering it to at least one object to be protected from fire. [Effects of the Invention]

[0008] At least one embodiment of the present invention provides a fire extinguishing system that can improve economy. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram of a structure equipped with a fire extinguishing system according to an embodiment. [Figure 2] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 3] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 4] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 5]1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 6] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 7] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 8] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 9] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 10] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; [Figure 11] 1 is a schematic diagram of a fire extinguishing system according to an embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0011] (Structures equipped with fire extinguishing equipment) FIG. 1 is a schematic diagram of a structure equipped with a fire extinguishing system according to one embodiment. Each of FIGS. 2 to 11 is a schematic diagram of a fire extinguishing system according to one embodiment. A fire extinguishing system 1 according to some embodiments is mounted on a structure 11. In the illustrated embodiment, the structure 11 is a data center. The structure 11 includes an air conditioner 12 for adjusting the air conditioning of the structure 11, a server rack 13 having an interior space 130 for accommodating servers, a server room 14 having an interior space 140 for accommodating UPS for the server rack 13 and the servers, and a power equipment room 16 having an interior space 160 for accommodating power supply equipment 15 such as a generator and a transformer. Because there is a risk of fire caused by electrical equipment, at least one of the air conditioner 12, the server rack 13, the server room 14, and the power equipment room 16 may be designated as a fire prevention object 10, which will be described later. That is, the structure 11 includes at least one fire prevention object 10.

[0012] (Fire extinguishing equipment) 1 to 11, a fire extinguishing system 1 according to some embodiments includes an ORC cycle 2 configured to circulate an extinguishing agent as a working medium, and at least one extinguishing agent supply line 3 for extracting the extinguishing agent from the ORC cycle 2 and sending it to at least one fire-protected object 10. Hereinafter, a generally liquid extinguishing agent will be referred to as a liquid extinguishing agent, and a generally gaseous extinguishing agent will be referred to as a gaseous extinguishing agent.

[0013] (Fire extinguishing agent) The extinguishing agent is preferably a halide such as HFC227ea or Novec (registered trademark) 1230. The extinguishing agent is preferably a highly flame-retardant agent having an electrical conductivity of a predetermined value or less when measured at a predetermined temperature.

[0014] (ORC cycle) The ORC cycle 2 comprises a circulation system configured to circulate a fire extinguishing agent as a working medium. As shown in Figures 2 to 11, the ORC cycle 2 includes a condenser 21, a booster pump 22, a vaporizer 23, and an expansion turbine 24, each of which is provided on the ORC cycle 2. The ORC cycle 2 constitutes an organic Rankine cycle that uses a fire extinguishing agent as a working medium. In the following description, when simply referring to the upstream side, it refers to the upstream side along the main flow direction of the fluid in the part or region described in the directional description. Similarly, in the following description, when simply referring to the downstream side, it refers to the downstream side along the main flow direction of the fluid in the part or region described in the directional description.

[0015] (condenser) The condenser 21 is provided downstream of the expansion turbine 24 in the ORC cycle 2 and upstream of the booster pump 22. The extinguishing agent expanded in the expansion turbine 24 flows in a gaseous state into the condenser 21. The condenser 21 is configured to transfer cold energy from the first heat medium (e.g., cooling water) flowing through the first heat medium supply line 4 to the gaseous extinguishing agent flowing through the ORC cycle 2, thereby liquefying the extinguishing agent.

[0016] In the illustrated embodiment, the condenser 21 has a first extinguishing agent-side flow path provided on the ORC cycle 2 through which a gaseous extinguishing agent flows, and a first heat medium-side flow path provided on the first heat medium supply line 4 through which a first heat medium flows that has a lower temperature than the gaseous extinguishing agent flowing in the first extinguishing agent-side flow path, and is configured to allow heat exchange between the first extinguishing agent-side flow path and the first heat medium-side flow path. Through heat exchange in the condenser 21, the gaseous extinguishing agent flowing in the first extinguishing agent-side flow path is cooled by the first heat medium flowing in the first heat medium-side flow path and condenses (liquefies).

[0017] (First heat medium tank, first heat medium supply line) As shown in FIGS. 2 to 11, the fire extinguishing system 1 may further include a first heat medium tank 41 configured to store a first heat medium in a liquid state, and a first heat medium supply line 4. The first heat medium supply line 4 comprises a first heat medium supply system for sending the first heat medium from the first heat medium tank 41 to a supply destination of the first heat medium (e.g., the condenser 21, etc.). The first heat medium in a liquid state stored in the first heat medium tank 41 has a lower temperature than the gaseous fire extinguishing agent introduced to the condenser 21. In one embodiment, the first heat medium tank 41 stores cooling water at approximately 5°C as the first heat medium. The first heat medium from the first heat medium tank 41 flows into the condenser 21 in a liquid state.

[0018] One end (upstream end) of the first heat medium supply line 4 is connected to the first heat medium tank 41, and the other end (downstream end) of the first heat medium supply line 4 is connected to a supply destination of the first heat medium (for example, the condenser 21). The first heat medium supply line 4 is provided upstream of the condenser 21 on the first heat medium supply line 4 and includes a first heat medium pump 42 for sending the liquid first heat medium. The first heat medium pump 42 extracts the liquid first heat medium stored in the first heat medium tank 41 into the first heat medium supply line 4, and the first heat medium is sent downstream of the first heat medium supply line 4.

[0019] (Booster pump) The boost pump 22 is provided downstream of the condenser 21 on the ORC cycle 2. The extinguishing agent liquefied in the condenser 21 flows into the boost pump 22 in a liquid state. The boost pump 22 is configured to boost the pressure of the liquid extinguishing agent. By driving the boost pump 22, the extinguishing agent circulates through the ORC cycle 2 as a working medium.

[0020] (Fire extinguishing agent storage tank) 2 to 11, the ORC cycle 2 may further include an extinguishant storage tank 25 provided downstream of the condenser 21 on the ORC cycle 2 and upstream of the booster pump 22. The extinguishant storage tank 25 is configured to store a liquid extinguishant obtained by liquefying a gaseous extinguishant in the condenser 21. By driving the booster pump 22, the liquid extinguishant stored in the extinguishant storage tank 25 is sent to the ORC cycle 2 downstream of the extinguishant storage tank 25.

[0021] (Vaporizer) Vaporizer 23 is provided downstream of boost pump 22 and upstream of expansion turbine 24 in ORC cycle 2. The fire-extinguishing agent pressurized by boost pump 22 flows into vaporizer 23 in a liquid state. Vaporizer 23 is configured to transfer thermal energy from a second heat medium (e.g., refrigerant oil or refrigerant water recovered from exhaust heat from a server) flowing through second heat medium supply line 5 to the liquid fire-extinguishing agent flowing through ORC cycle 2, thereby vaporizing the liquid fire-extinguishing agent.

[0022] In the illustrated embodiment, the vaporizer 23 has a second extinguishing agent-side flow path provided on the ORC cycle 2 through which the liquid extinguishing agent flows, and a second heat medium-side flow path provided on the second heat medium supply line 5 through which a second heat medium with a higher temperature than the liquid extinguishing agent flowing in the second extinguishing agent-side flow path flows, and is configured to enable heat exchange between the second extinguishing agent-side flow path and the second heat medium-side flow path. Through heat exchange in the vaporizer 23, the liquid extinguishing agent flowing in the second extinguishing agent-side flow path is heated by the second heat medium flowing in the second heat medium-side flow path and evaporates (vaporizes).

[0023] (Second heat medium tank, second heat medium supply line) As shown in FIGS. 2 to 11, the fire extinguishing system 1 may further include a second heat medium tank 51 configured to store a second heat medium in a liquid state, and a second heat medium supply line 5. The second heat medium supply line 5 comprises a second heat medium supply system for sending the second heat medium from the second heat medium tank 51 to a supply destination of the second heat medium (e.g., the vaporizer 23, etc.). The second heat medium in a liquid state stored in the second heat medium tank 51 has a higher temperature than the liquid fire extinguishing agent introduced to the vaporizer 23. In one embodiment, the second heat medium tank 51 stores a waste heat recovery refrigerant (such as refrigerant oil or refrigerant water) at approximately 60°C that has recovered waste heat from servers as the second heat medium. The second heat medium from the second heat medium tank 51 flows into the vaporizer 23 in a liquid state.

[0024] One end (upstream end) of the second heat medium supply line 5 is connected to the second heat medium tank 51, and the other end (downstream end) of the second heat medium supply line 5 is connected to a supply destination of the second heat medium (for example, the vaporizer 23). The second heat medium supply line 5 is provided upstream of the vaporizer 23 on the second heat medium supply line 5 and includes a second heat medium pump 52 for sending the liquid second heat medium. The second heat medium pump 52 extracts the liquid second heat medium stored in the second heat medium tank 51 into the second heat medium supply line 5, and the second heat medium is sent downstream of the second heat medium supply line 5.

[0025] The expansion turbine 24 is provided downstream of the vaporizer 23 and upstream of the condenser 21 in the ORC cycle 2, and is configured to expand the gaseous fire-extinguishing agent. The fire-extinguishing agent vaporized in the vaporizer 23 flows into the expansion turbine 24 in a gaseous state. The expansion turbine 24 is configured to expand the gaseous fire-extinguishing agent and recover rotational power for the turbine from the gaseous fire-extinguishing agent. As shown in FIGS. 2 to 11 , the ORC cycle 2 may further include a generator 26 connected to the expansion turbine 24. The generator 26 is configured to be rotationally driven by the rotational power recovered by the expansion turbine 24 to generate electricity.

[0026] In the ORC cycle 2, the expansion turbine 24 can output power using cold energy recovered from the first heat medium in the condenser 21. Furthermore, if the ORC cycle 2 includes a generator 26, the power output by the expansion turbine 24 can be converted into electric power.

[0027] (Fire extinguishing agent supply line) At least one extinguishant supply line 3 comprises a fire extinguishant supply system for sending an extinguishant from the ORC cycle 2 to at least one fire prevention object 10. Each of the extinguishant supply lines 3 has one end (upstream end) 31A, 31B connected to the ORC cycle 2 and the other end (downstream end) 32A, 32B connected to the fire prevention object 10. At least one extinguishant ejection port 33A, 33B for ejecting an extinguishant may be formed at the other end 32A, 32B of each of the extinguishant supply lines 3. Note that each of the extinguishant supply lines 3 may have a plurality of extinguishant ejection ports 33A, 33B formed at the other end 32A, 32B of each of the extinguishant supply lines 3 for ejecting an extinguishant toward each of the plurality of fire prevention objects 10.

[0028] (bypass line, bypass valve) 2 to 11, the ORC cycle 2 may further include a bypass line 27 that bypasses the expansion turbine 24, and a bypass valve 28 provided on the bypass line 27. One end (upstream end) of the bypass line 27 is connected to a location downstream of the evaporator 23 and upstream of the expansion turbine 24 in the ORC cycle 2, and the other end (downstream end) is connected to a location downstream of the expansion turbine 24 and upstream of the condenser 21 in the ORC cycle 2.

[0029] The bypass valve 28 has a valve element (not shown) that can open and close the flow path of the gaseous fire-extinguishing agent in the bypass line 27, and is configured to be able to adjust the flow rate of the gaseous fire-extinguishing agent that is guided downstream of the bypass valve 28 on the bypass line 27. By opening the bypass valve 28, the gaseous fire-extinguishing agent flowing through the ORC cycle 2 bypasses the expansion turbine 24 and passes through the bypass line 27. Note that the bypass valve 28 may be an on-off valve whose opening degree can be adjusted to fully closed or fully open, or may be an opening degree adjustment valve whose opening degree can be adjusted to fully closed, fully open, and at least one intermediate opening degree therebetween.

[0030] As shown in FIGS. 2 to 11 , a fire extinguishing system 1 according to some embodiments includes the ORC cycle 2 and at least one extinguishing agent supply line 3. In this case, when a fire breaks out in a fire-prevention object 10, a liquid or gaseous extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 via the extinguishing agent supply line 3, thereby extinguishing the fire in the fire-prevention object 10. During steady-state operation when no fire has broken out, the extinguishing agent is circulated as a working medium within the ORC cycle 2 to drive the expansion turbine 24, thereby recovering the output of the expansion turbine 24. By using the extinguishing agent as a working medium for the ORC cycle 2 in this way, the economic efficiency of the fire extinguishing system 1 can be improved compared to when the extinguishing agent is simply stored within the structure 11 that includes the fire-prevention object 10.

[0031] Furthermore, if the fire extinguishing agent is simply stored within the structure 11 that includes the fire prevention object 10, an occupied space for storing the fire extinguishing agent is required in the structure 11. In contrast, according to the above configuration, the fire extinguishing agent is used as the working medium of the ORC cycle 2, so that the occupied space is not required.

[0032] (Liquid extinguishing agent supply line) 2 to 7, 10, and 11, the at least one extinguishant supply line 3 includes a liquid extinguishant supply line 3A for supplying a liquid extinguishant from the ORC cycle 2 to at least one fire-protection object 10 (10A). One end (upstream end) 31A of the liquid extinguishant supply line 3A is connected to a location downstream of the condenser 21 and upstream of the vaporizer 23 on the ORC cycle 2.

[0033] As shown in Figures 2, 4 to 7, and 10, the fire extinguishing system 1 may further include a first flow rate adjustment valve 34A provided on the liquid extinguishing agent supply line 3A. The first flow rate adjustment valve 34A has a valve element (not shown) that can open and close the flow path of the liquid extinguishing agent in the liquid extinguishing agent supply line 3A, and is configured to be able to adjust the flow rate of the liquid extinguishing agent introduced to the fire prevention object 10A (10) connected to the other end 32A of the liquid extinguishing agent supply line 3A. The first flow rate adjustment valve 34A may be an on-off valve whose opening degree can be adjusted between fully closed and fully open, or may be an opening degree adjustment valve whose opening degree can be adjusted to fully closed, fully open, and at least one intermediate opening degree between these.

[0034] When a fire alarm 7 (7A) provided in the fire prevention object 10A detects the outbreak of a fire in the fire prevention object 10A, the first flow control valve 34A is configured to increase its opening from a fully closed state. A portion of the liquid fire extinguishant flowing through the ORC cycle 2 is sent from the ORC cycle 2 to the liquid fire extinguishant supply line 3A through one end 31A of the liquid fire extinguishant supply line 3A. The liquid fire extinguishant sent to the liquid fire extinguishant supply line 3A passes through the first flow control valve 34A and is sprayed onto the fire prevention object 10A from a fire extinguishant spray nozzle 33A formed at the other end 32A.

[0035] According to the above configuration, the liquid fire extinguishing agent can be sent from the ORC cycle 2 to the fire prevention object 10A (10) through the liquid fire extinguishing agent supply line 3A. The liquid fire extinguishing agent sent to the fire prevention object 10A has a low temperature below its liquefaction temperature, so it can absorb heat from the burning material (fire heat source) in the fire prevention object 10A and lower its temperature below its ignition temperature. In other words, the liquid fire extinguishing agent sent to the fire prevention object 10A can cool and extinguish the fire in the fire prevention object 10A.

[0036] (Connection location of liquid extinguishing agent supply line) 2, 4 to 7, 10, and 11, one end 31A of the liquid extinguishant supply line 3A is connected to the ORC cycle 2 downstream of the boost pump 22 and upstream of the vaporizer 23. In this case, when the liquid extinguishant is sent to the fire-prevention object 10 through the liquid extinguishant supply line 3A, the boosting effect of the boost pump 22 on the extinguishant can be utilized.

[0037] In another embodiment, the one end 31A of the liquid extinguishant supply line 3A may be connected downstream of the condenser 21 and upstream of the booster pump 22 on the ORC cycle 2. When the ORC cycle 2 includes an extinguishant storage tank 25, as shown in Fig. 3, the one end 31A of the liquid extinguishant supply line 3A is preferably connected downstream of the extinguishant storage tank 25 on the ORC cycle 2 so that the liquid extinguishant stored in the extinguishant storage tank 25 can be used. As shown in Fig. 3, the one end 31A of the liquid extinguishant supply line 3A may be connected to the extinguishant storage tank 25.

[0038] (backing pump) The liquid extinguishant supply line 3A may include an auxiliary pump 35 provided on the extinguishant supply line 3A for pressurizing the liquid extinguishant flowing through the liquid extinguishant supply line 3A. The auxiliary pump 35 is configured to pressurize the liquid extinguishant. By driving the auxiliary pump 35, the liquid extinguishant is sent to the downstream side of the liquid extinguishant supply line 3A.

[0039] According to the above configuration, when the boost pump 22 alone cannot provide a sufficient boost to send the liquid extinguishant through the liquid extinguishant supply line 3A to the fire prevention object 10, the auxiliary pump 35 can be provided to ensure a sufficient boost to send the liquid extinguishant to the fire prevention object 10. For example, when one end 31A of the liquid extinguishant supply line 3A is connected downstream of the condenser 21 and upstream of the boost pump 22 in the ORC cycle 2, it is preferable to provide the auxiliary pump 35 on the liquid extinguishant supply line 3A. Furthermore, according to the above configuration, by providing the auxiliary pump 35, it is not necessary to provide a sufficient boost with the boost pump 22 alone, and therefore the boost pump 22 can be prevented from becoming larger and more expensive.

[0040] (gaseous fire extinguishing agent supply line) 8 to 11, in some embodiments, the at least one extinguishant supply line 3 includes a gaseous extinguishant supply line 3B for supplying a gaseous extinguishant from the ORC cycle 2 to at least one fire prevention object 10 (10B). One end (upstream end) 31B of the gaseous extinguishant supply line 3B is connected to a location downstream of the vaporizer 23 and upstream of the condenser 21 on the ORC cycle 2.

[0041] As shown in Figures 8 to 11, the fire extinguishing system 1 may further include a second flow rate adjustment valve 34B provided on the gaseous fire extinguishing agent supply line 3B. The second flow rate adjustment valve 34B has a valve element (not shown) that can open and close the flow path of the gaseous fire extinguishing agent in the gaseous fire extinguishing agent supply line 3B, and is configured to be able to adjust the flow rate of the gaseous fire extinguishing agent introduced to the fire prevention object 10B (10) connected to the other end 32B of the gaseous fire extinguishing agent supply line 3B. The second flow rate adjustment valve 34B may be an on-off valve whose opening degree can be adjusted between fully closed and fully open, or may be an opening degree adjustment valve whose opening degree can be adjusted to fully closed, fully open, and at least one intermediate opening degree between these.

[0042] When a fire alarm 7 (7B) provided in the fire prevention object 10B detects the outbreak of a fire in the fire prevention object 10B, the second flow control valve 34B is configured to increase its opening from a fully closed state. A portion of the gaseous fire extinguishing agent flowing through the ORC cycle 2 is sent from the ORC cycle 2 to the gaseous fire extinguishing agent supply line 3B through one end 31B of the gaseous fire extinguishing agent supply line 3B. The gaseous fire extinguishing agent sent to the gaseous fire extinguishing agent supply line 3B passes through the second flow control valve 34B and is sprayed onto the fire prevention object 10B from a fire extinguisher nozzle 33B formed at the other end 32B.

[0043] According to the above configuration, the gaseous fire extinguishing agent can be sent from the ORC cycle 2 to the fire prevention object 10B (10) through the gaseous fire extinguishing agent supply line 3B. The gaseous fire extinguishing agent sent to the fire prevention object 10B can block the supply of air to the burning material (fire heat source) in the fire prevention object 10B or dilute the oxygen concentration within the fire prevention object 10B. In other words, the gaseous fire extinguishing agent sent to the fire prevention object 10B can extinguish a fire in the fire prevention object 10B by oxygen deficiency.

[0044] (Connection location of gaseous fire extinguishing agent supply line) 8 to 11, one end 31B of the gaseous fire-extinguishing agent supply line 3B is connected to the bypass line 27. In this case, the gaseous fire-extinguishing agent flowing through the bypass line 27 is not expanded in the expansion turbine 24, and the boosting action of the booster pump 22 remains. Therefore, when the gaseous fire-extinguishing agent is sent to the fire-prevention object 10 through the bypass line 27 and the gaseous fire-extinguishing agent supply line 3B, the boosting action of the booster pump 22 can be utilized.

[0045] 8 to 11, in some embodiments, the bypass valve 28 described above is composed of a three-way valve 28A, and one end 31B of the gaseous fire-extinguishing agent supply line 3B is connected to one of the fluid inlets and outlets of the three-way valve 28A. The three-way valve 28A can switch the destination of the gaseous fire-extinguishing agent to either the side of the bypass line 27 downstream of the three-way valve 28A or the gaseous fire-extinguishing agent supply line 3B. In this case, the three-way valve 28A functions as the second flow rate adjustment valve 34B described above, eliminating the need to separately provide a second flow rate adjustment valve 34B in the gaseous fire-extinguishing agent supply line 3B, thereby preventing the structure of the fire extinguishing equipment 1 from becoming complicated.

[0046] In another embodiment, one end 31B of the gaseous fire-extinguishing agent supply line 3B may be connected to a circulation line connecting the vaporizer 23 and the condenser 21 in the ORC cycle 2. The expansion turbine 24 is provided on the circulation line. One end and the other end of a bypass line 27 are connected to the circulation line. It is preferable that one end 31B of the gaseous fire-extinguishing agent supply line 3B be connected to a position upstream of the expansion turbine 24 on the circulation line rather than downstream of the expansion turbine 24.

[0047] (auxiliary compressor) In some embodiments, as shown in FIG. 11 , the gaseous fire-extinguishing agent supply line 3B may include an auxiliary compressor 36 provided on the gaseous fire-extinguishing agent supply line 3B for pressurizing the gaseous fire-extinguishing agent flowing through the gaseous fire-extinguishing agent supply line 3B. The auxiliary compressor 36 is configured to pressurize the gaseous fire-extinguishing agent. In the illustrated embodiment, the gaseous fire-extinguishing agent supply line 3B may further include an electric motor 37 connected to the auxiliary compressor 36. The auxiliary compressor 36 is configured to be rotationally driven by rotational power output by the electric motor 37 after converting electric power, and to pressurize the gaseous fire-extinguishing agent guided to the auxiliary compressor 36. By driving the auxiliary compressor 36, the gaseous fire-extinguishing agent is sent to the downstream side of the gaseous fire-extinguishing agent supply line 3B.

[0048] According to the above configuration, when the boost pump 22 alone cannot provide a sufficient boost to send the gaseous fire extinguishing agent through the gaseous fire extinguishing agent supply line 3B to the fire prevention object 10, the auxiliary compressor 36 can be provided to ensure a sufficient boost to send the gaseous fire extinguishing agent to the fire prevention object 10. Furthermore, according to the above configuration, it is not necessary to ensure a sufficient boost with the boost pump 22 alone, so that the boost pump 22 can be prevented from becoming larger and more expensive.

[0049] (branch line, fire extinguishing condenser) 9, the at least one extinguishant supply line 3 further includes a branch line 38 having one end (upstream end) 381 connected to the gaseous extinguishant supply line 3B. The other end (downstream end) 382 of the branch line 38 is connected to the fire prevention object 10. The other end 382 of the branch line 38 may be formed with at least one extinguishant injection port 383 for injecting the extinguishant.

[0050] The branch line 38 includes a fire-extinguishing condenser 39 for liquefying the gaseous fire-extinguishing agent provided on the branch line 38. The fire-extinguishing condenser 39 is configured to transfer cold energy from the refrigerant (e.g., cooling water) flowing through the refrigerant supply line 4C to the gaseous fire-extinguishing agent flowing through the branch line 38, thereby liquefying the gaseous fire-extinguishing agent.

[0051] The fire extinguishing condenser 39 may be configured to allow heat exchange between the gaseous fire extinguishing agent flowing through the branch line 38 and the refrigerant flowing through the refrigerant supply line 4C. Through heat exchange in the fire extinguishing condenser 39, the gaseous fire extinguishing agent flowing through the branch line 38 is cooled by the refrigerant flowing through the refrigerant supply line 4C and condenses (liquefies). As shown in Fig. 9, the fire extinguishing system 1 may further include the refrigerant supply line 4C and a refrigerant tank 41C configured to store the refrigerant in a liquid state to be sent to the refrigerant supply line 4C.

[0052] As shown in Figure 9, the other end 32B of the gaseous fire extinguishing agent supply line 3B is connected to a first fire prevention object 10B among at least one fire prevention object 10, and the other end 382 of the branch line 38 is connected to a second fire prevention object 10A among at least one fire prevention object 10, which is different from the first fire prevention object 10B.

[0053] According to the above configuration, the fire extinguishing system 1 selects whether to send a liquid fire extinguishing agent through the liquid fire extinguishing agent supply line 3A or a gaseous fire extinguishing agent through the gaseous fire extinguishing agent supply line 3B for each fire extinguishing target 10. Specifically, for those fire extinguishing targets (fire prevention targets 10) where people are permanently present and where there is concern that extinguishing a fire using a gaseous fire extinguishing agent at such targets may have adverse effects on the human body, the fire extinguishing agent is liquefied by the fire extinguishing condenser 39 provided on the branch line 38, thereby eliminating such concerns. Furthermore, for fire extinguishing targets where no people are permanently present, the gaseous fire extinguishing agent can be sent through the gaseous fire extinguishing agent supply line 3B.

[0054] In some embodiments, as shown in FIG. 11, the at least one extinguishing agent supply line 3 includes the liquid extinguishing agent supply line 3A and the gaseous extinguishing agent supply line 3B.

[0055] According to the above configuration, a liquid fire extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 through the liquid fire extinguishing agent supply line 3A, thereby enabling cooling and extinguishing of a fire in the fire-prevention object 10. Also, a gaseous fire extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 through the gaseous fire extinguishing agent supply line 3B, thereby enabling oxygen-deficient extinguishing of a fire in the fire-prevention object 10.

[0056] In some embodiments, as shown in FIG. 11, the other end 32B of the gaseous fire extinguishing agent supply line 3B is connected to a first fire prevention object 10B among at least one fire prevention object 10, and the other end 32A of the liquid fire extinguishing agent supply line 3A is connected to a second fire prevention object 10A, which is different from the first fire prevention object 10B, among at least one fire prevention object 10.

[0057] A gaseous fire extinguishing agent can be supplied to the first fire protection object 10B from the ORC cycle 2 through a gaseous fire extinguishing agent supply line 3B. A liquid fire extinguishing agent can be supplied to the second fire protection object 10A from the ORC cycle 2 through a liquid fire extinguishing agent supply line 3A.

[0058] According to the above configuration, the fire extinguishing system 1 selects whether to send a liquid fire extinguishing agent through the liquid fire extinguishing agent supply line 3A or a gaseous fire extinguishing agent through the gaseous fire extinguishing agent supply line 3B for each fire prevention object 10 that is the fire extinguishing target. Specifically, among the multiple fire extinguishing targets (fire prevention objects 10), for those fire extinguishing targets where people are permanently present and where there is a concern that extinguishing a fire using a gaseous fire extinguishing agent at such targets may have adverse effects on the human body, the above concern can be eliminated by sending a liquid fire extinguishing agent through the liquid fire extinguishing agent supply line 3A. Furthermore, for fire extinguishing targets where people are not permanently present, a gaseous fire extinguishing agent can be sent through the gaseous fire extinguishing agent supply line 3B.

[0059] Furthermore, the fire extinguishing equipment 1 described above can prevent the structure of the fire extinguishing equipment 1 from becoming too complicated, and can reduce the power consumption required to send the refrigerant to the condenser, compared to a structure in which the gaseous fire extinguishing agent flowing through the gaseous fire extinguishing agent supply line 3B is liquefied by a condenser (fire extinguishing condenser 39) and then sent to the extinguishing target (second fire prevention target 10A) that is the target of fire extinguishing using a liquid fire extinguishing agent.

[0060] (Combustion equipment) In some embodiments, the first heat medium stored in the first heat medium tank 41 described above is made of a liquefied gas having a lower liquefaction temperature (boiling point) than water. Examples of this liquefied gas include liquefied natural gas (LNG) and liquid hydrogen. In some embodiments, the fire extinguishing system 1 described above may further include a combustion device (e.g., a gas turbine) 43 configured to combust the first heat medium, as shown in FIGS. 3 and 4 . The combustion device 43 is connected to the other end (downstream end) of the first heat medium supply line 4, and is configured to send the first heat medium vaporized on the first heat medium supply line 4.

[0061] By using a liquefied gas having a lower liquefaction temperature (boiling point) than water as the first heat medium, the cold energy from the first heat medium transferred to the condenser 21 can be increased compared to cooling water. This increases the temperature difference between the heat source and the cold source in the ORC cycle 2, and increases the output of the expansion turbine 24.

[0062] (1st heat medium side heater) As shown in FIGS. 3 and 4 , the above-described fire extinguishing equipment 1 may further include a first heat medium-side heater 44 for heating the first heat medium provided on the first heat medium supply line 4. The first heat medium-side heater 44 is provided on the first heat medium supply line 4 downstream of the condenser 21 or the intermediate cycle-side cooler 61. The first heat medium-side heater 44 heats the gaseous first heat medium to an appropriate temperature and then supplies the first heat medium to a supply destination. The first heat medium-side heater 44 may be configured to heat the first heat medium by exchanging heat between the heat medium flowing through the heat medium supply line 5A (for example, refrigerant oil or refrigerant water recovered from server exhaust heat) and the first heat medium flowing through the first heat medium supply line 4.

[0063] As shown in Figures 3 and 4, the fire extinguishing system 1 may further include a heat medium supply line 5A and a heat medium tank 51A configured to store a liquid heat medium to be sent to the heat medium supply line 5A.

[0064] (Mid-cycle) 4, the fire extinguishing system 1 further includes an intermediate cycle 6 configured to circulate the third heat medium. The intermediate cycle 6 includes an intermediate cycle cooler 61, an intermediate cycle boost pump 62, and an intermediate cycle heater 63.

[0065] (Intermediate cycle side cooler) The intermediate cycle side cooler 61 is provided downstream of the intermediate cycle side heater 63 on the intermediate cycle 6 and upstream of the intermediate cycle side boost pump 62. The third heat medium heated in the intermediate cycle side heater 63 flows into the intermediate cycle side cooler 61. The intermediate cycle side cooler 61 is provided downstream of the first heat medium pump 42 on the first heat medium supply line 4, in place of the condenser 21. The intermediate cycle side cooler 61 is configured to transfer cold energy from the first heat medium to the third heat medium.

[0066] The intermediate cycle side cooler 61 is configured to enable heat exchange between the third heat medium flowing through the intermediate cycle 6 and the first heat medium flowing through the first heat medium supply line 4. Through the heat exchange in the intermediate cycle side cooler 61, the third heat medium flowing through the intermediate cycle 6 is cooled by the first heat medium flowing through the first heat medium supply line 4.

[0067] (Intermediate cycle boost pump) The intermediate cycle boost pump 62 is provided downstream of the intermediate cycle cooler 61 on the intermediate cycle 6. The third heat medium cooled in the intermediate cycle cooler 61 flows into the intermediate cycle boost pump 62 in a liquid state. The intermediate cycle boost pump 62 is configured to boost the pressure of the liquid third heat medium. By driving the intermediate cycle boost pump 62, the third heat medium circulates through the intermediate cycle 6.

[0068] (Intermediate cycle storage tank) The intermediate cycle 6 may further include an intermediate-cycle-side storage tank 64 provided downstream of the intermediate-cycle-side cooler 61 on the intermediate cycle 6 and upstream of the intermediate-cycle-side boost pump 62. The intermediate-cycle-side storage tank 64 is configured to store the third heat medium cooled in the intermediate-cycle-side cooler 61. By driving the intermediate-cycle-side boost pump 62, the third heat medium stored in the intermediate-cycle-side storage tank 64 is sent to the intermediate cycle 6 downstream of the intermediate-cycle-side storage tank 64.

[0069] (condenser) The condenser 21 is provided downstream of the expansion turbine 24 in the ORC cycle 2 and upstream of the boost pump 22. The condenser 21 is also provided downstream of the intermediate-cycle-side boost pump 62 in the intermediate cycle 6 and upstream of the intermediate-cycle-side heater 63. The condenser 21 is configured to perform heat exchange between the gaseous fire-extinguishing agent flowing in the ORC cycle 2 and the third heat medium flowing in the intermediate cycle 6. Through the heat exchange in the condenser 21, the gaseous fire-extinguishing agent flowing in the ORC cycle 2 is cooled by the third heat medium flowing in the intermediate cycle 6 and condenses (liquefies). The third heat medium flowing in the intermediate cycle 6 is also heated by the gaseous fire-extinguishing agent flowing in the ORC cycle 2 and its temperature increases.

[0070] (Intermediate cycle side heater) The intermediate cycle side heater 63 is provided downstream of the intermediate cycle side boost pump 62 and the condenser 21 in the intermediate cycle 6 and upstream of the intermediate cycle side cooler 61. The intermediate cycle side heater 63 is configured to transfer thermal energy from the fourth heat medium to the third heat medium flowing through the intermediate cycle 6 to raise the temperature thereof.

[0071] 4, the heat medium supply line 5A includes a first heat medium supply line 53 for supplying the heat medium to the first heat medium-side heater 44, and a second heat medium supply line 54 for supplying the heat medium (fourth heat medium) to the intermediate cycle-side heater 63. The first heat medium supply line 53 and the second heat medium supply line 54 branch off at a branch point 55 on the heat medium supply line 5A. The heat medium supply line 5A may include a heat medium-side pump 52B for supplying the heat medium upstream of the branch point 55 on the heat medium supply line 5A.

[0072] According to the above configuration, the provision of the intermediate cycle 6 makes it easy to adjust the temperature and pressure of the extinguishing agent flowing through the ORC cycle 2, thereby improving the controllability of the ORC cycle 2.

[0073] In some embodiments, the boost pump 22 is configured to be able to adjust the pressure ratio, which is the ratio of its discharge pressure (outlet pressure) to its inlet pressure. By adjusting the pressure ratio of the boost pump 22, the pressure of the liquid fire extinguishing agent discharged from the boost pump 22 can be adjusted, and the delivery distance of the fire extinguishing agent can be adjusted. In this case, the delivery distance of the fire extinguishing agent can be made longer than in a conventional configuration in which nitrogen gas is delivered to the fire extinguishing target using the internal pressure of a cylinder, thereby improving the degree of freedom in layout of the fire extinguishing equipment 1 in the structure 11.

[0074] 5, the fire extinguishing system 1 includes a fire alarm 7 provided in at least one fire-protected object 10, and flow rate control valves 34A, 34B provided on at least one extinguishing agent supply line 3. The fire extinguishing system 1 is configured to open the flow rate control valves 34A, 34B and increase the pressure ratio of the boost pump 22 when a fire alarm signal is received from the fire alarm 7.

[0075] In the illustrated embodiment, the fire extinguishing equipment 1 includes a control device 8 for controlling the equipment included in the fire extinguishing equipment 1. The control device 8 is an electronic control unit for controlling the equipment included in the fire extinguishing equipment 1. The control device 8 is configured as a microcomputer including a CPU (processor) (not shown), memories such as ROM and RAM, a storage device such as an external storage device, an I / O interface, a communication interface, etc. The control device 8 may realize control of the equipment included in the fire extinguishing equipment 1 by, for example, causing the CPU to operate (for example, perform data calculations) in accordance with instructions of a program loaded into a main storage device of the memory.

[0076] The control device 8 is configured to be able to receive a fire alarm signal from the fire alarm 7. The control device 8 is also configured to be able to instruct the pumps (such as the boost pump 22) included in the fire extinguishing equipment 1 to drive or stop, and to instruct the boost pump 22 about the pressure ratio of the boost pump 22. The control device 8 is also configured to be able to instruct the valves (such as the flow rate adjustment valves 34A, 34B) included in the fire extinguishing equipment 1 about the opening degrees.

[0077] When the control device 8 receives a fire alarm signal from the fire alarm device 7, it instructs the flow control valves 34A, 34B provided on the fire extinguishant supply line 3 for supplying the fire extinguishant to the fire-protected object 10 where the fire alarm device 7 is provided to open their openings from the fully closed state. In addition, when the control device 8 receives a fire alarm signal from the fire alarm device 7, it instructs the boost pump 22 to increase the pressure ratio of the boost pump 22 above the set pressure ratio set for the steady state before receiving the fire alarm signal from the fire alarm device 7.

[0078] According to the above configuration, during steady-state operation when no fire has occurred, the pressure ratio of boost pump 22 is set low, thereby suppressing an increase in power consumption of ORC cycle 2 and enabling economical operation of ORC cycle 2. When a fire has occurred at fire-protected object 10, the discharge pressure of boost pump 22 can be increased to an appropriate pressure for delivering fire-extinguishing agent to fire-protected object 10 by receiving a fire alarm signal transmitted by fire alarm 7 and opening flow control valves 34A and 34B to increase the pressure ratio of boost pump 22, thereby enabling the delivery of just the right amount of fire-extinguishing agent to fire-protected object 10.

[0079] (Liquid fire extinguishing agent recovery line) 6, each of the at least one fire-protected object 10 described above has an interior space 100 into which a fire extinguishing agent is introduced. The fire extinguishing equipment 1 described above further includes a first fire extinguishing equipment-side condenser 91 configured to transfer cold energy from the fifth heat medium to the fire extinguishing agent sprayed into the interior space 100 to liquefy the extinguishing agent, and a liquid extinguishing agent recovery line 92 for guiding the extinguishing agent liquefied in the first fire extinguishing equipment-side condenser 91 to the extinguishing agent storage tank 25. The fire extinguishing agent sprayed into the interior space 100 becomes gaseous.

[0080] The first fire extinguishing equipment-side condenser 91 is disposed in the internal space 100. The first fire extinguishing equipment-side condenser 91 may be configured to enable heat exchange between the gaseous fire extinguishing agent present in the internal space 100 and a fifth heat medium (refrigerant) flowing through the refrigerant supply line 45. As shown in FIG. 6 , the upstream end of the refrigerant supply line 45 may be connected to the first heat medium tank 41, and the fifth heat medium flowing through the refrigerant supply line 45 may be the first heat medium sent from the first heat medium tank 41.

[0081] The extinguishing agent liquefied in the first fire extinguishing equipment condenser 91 is returned to the extinguishing agent storage tank 25 via a liquid extinguishing agent recovery line 92 .

[0082] According to the above configuration, the extinguishing agent sprayed into the internal space 100 of the fire-prevention object 10 can be liquefied and then returned to the extinguishing agent storage tank 25. In this case, by recovering and reusing the extinguishing agent sprayed into the internal space 100, the consumption of expensive extinguishing agent can be reduced, thereby improving the economic efficiency of the fire extinguishing system 1. This embodiment is suitable for use in a fire-prevention object 10 that is highly sealed and therefore less susceptible to leakage of the extinguishing agent, such as a server rack 13.

[0083] (Gaseous fire extinguishing agent recovery line) 7, each of the at least one fire-protected object 10 described above has an interior space 100 into which a fire extinguishing agent is introduced. The fire extinguishing system 1 described above further includes a gaseous fire extinguishing agent recovery line 94 for removing the gas (air) containing the fire extinguishing agent sprayed into the interior space 100 from the interior space 100 and returning the liquefied fire extinguishing agent to the fire extinguishing agent storage tank 25.

[0084] The gaseous fire extinguishing agent recovery line 94 includes a second fire extinguishing equipment side condenser 95 provided on the gaseous fire extinguishing agent recovery line 94, and a gas-liquid separator 96 provided downstream of the second fire extinguishing equipment side condenser 95 on the gaseous fire extinguishing agent recovery line 94.

[0085] In the illustrated embodiment, the gaseous fire extinguishing agent recovery line 94 further includes a first gaseous fire extinguishing agent recovery line 94A for guiding gas containing a gaseous fire extinguishing agent from the internal space 100 to the second fire extinguishing equipment side condenser 95, a second gaseous fire extinguishing agent recovery line 94B for guiding the fire extinguishing agent liquefied in the second fire extinguishing equipment side condenser 95 to the gas-liquid separator 96, a third gaseous fire extinguishing agent recovery line 94C for guiding the liquid fire extinguishing agent from which the gas (air) has been separated in the gas-liquid separator 96 to the fire extinguishing agent storage tank 25, and a recovery line side flow control valve 97 provided on the third gaseous fire extinguishing agent recovery line 94C and configured to adjust the flow rate of the liquid fire extinguishing agent flowing through the third gaseous fire extinguishing agent recovery line 94C.

[0086] The second fire extinguishing equipment-side condenser 95 is disposed outside the fire prevention object 10. The second fire extinguishing equipment-side condenser 95 may be configured to enable heat exchange between the gaseous fire extinguishing agent flowing through the gaseous fire extinguishing agent recovery line 94 and the refrigerant flowing through the refrigerant supply line 4A. Through heat exchange in the second fire extinguishing equipment-side condenser 95, the gaseous fire extinguishing agent contained in the gas (air) is cooled by the refrigerant flowing through the refrigerant supply line 4A and condenses (liquefies). Through heat exchange in the second fire extinguishing equipment-side condenser 95, the air (non-condensable gas) does not condense. As shown in FIG. 7, the fire extinguishing equipment 1 may further include a refrigerant supply line 4A and a refrigerant tank 41A configured to store a liquid refrigerant to be sent to the refrigerant supply line 4A.

[0087] The gas-liquid separator 96 is configured to separate the liquid extinguishing agent from the air. Removing air (non-condensable gas) from the liquid extinguishing agent returned to the extinguishing agent storage tank 25 can suppress a decrease in heat exchange performance in the ORC cycle 2. While the ORC cycle 2 is operating, the internal pressure of the extinguishing agent storage tank 25 becomes lower than the internal pressure of the gas-liquid separator 96. Therefore, by opening the recovery line side flow control valve 97, the liquid extinguishing agent is sucked from the gas-liquid separator 96 into the extinguishing agent storage tank 25.

[0088] According to the above configuration, the extinguishing agent sprayed into the internal space 100 of the fire-prevention object 10 can be liquefied, separated from the air, and then returned to the extinguishing agent storage tank 25. In this case, by recovering the extinguishing agent from the air containing the sprayed extinguishing agent, the consumption of expensive extinguishing agent can be reduced, thereby improving the economic efficiency of the fire extinguishing system 1. Furthermore, according to the above configuration, when spraying the extinguishing agent into the internal space 100 of the fire-prevention object 10, the internal pressure of the internal space 100 can be prevented from becoming excessive by simultaneously discharging the gas containing the gaseous extinguishing agent via the first gaseous extinguishing agent recovery line 94A. This embodiment is suitable for use in a fire-prevention object 10 that is highly airtight and therefore less susceptible to extinguishing agent leakage, such as a server rack 13.

[0089] In this specification, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. Furthermore, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent rectangular shapes or cylindrical shapes in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. Furthermore, in this specification, the expressions "comprise," "include," or "have" a component are not exclusive expressions that exclude the presence of other components.

[0090] The present disclosure is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0091] The contents of the above-described embodiments can be understood, for example, as follows.

[0092] 1) At least one embodiment of the fire extinguishing equipment (1) according to the present disclosure includes: An ORC cycle (2) configured to circulate a fire extinguishing agent as a working medium, a condenser (21) provided on the ORC cycle (2) and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent, which is a gaseous fire extinguishing agent, to liquefy the gaseous fire extinguishing agent; a booster pump (22) provided downstream of a condenser (21) in the ORC cycle (2) for boosting the pressure of a liquid fire-extinguishing agent obtained by liquefying the gaseous fire-extinguishing agent in the condenser (21); a vaporizer (23) provided downstream of the boost pump (22) in the ORC cycle (2) and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine (24) provided downstream of the vaporizer (23) and upstream of the condenser (21) in the ORC cycle (2), the expansion turbine (24) being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; The ORC cycle (2) includes and at least one extinguishing agent supply line (3) for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle (2) and sending it to at least one object to be protected from fire (10).

[0093] According to the configuration 1), when a fire breaks out in the fire-prevention object (10), a liquid or gaseous fire-extinguishing agent is sent from the ORC cycle (2) to the fire-prevention object (10) via the fire-extinguishing agent supply line (3), thereby extinguishing the fire in the fire-prevention object (10). During steady-state operation when no fire has broken out, the fire-extinguishing agent is circulated as a working medium within the ORC cycle (2) to drive the expansion turbine (24), thereby recovering the output of the expansion turbine (24). By using the fire-extinguishing agent as a working medium for the ORC cycle (2) in this way, the economic efficiency of the fire extinguishing system (1) can be improved compared to when the fire-extinguishing agent is simply stored within the structure containing the fire-prevention object (10).

[0094] Furthermore, if the fire extinguishing agent is simply stored in a structure that includes the fire prevention object (10), a dedicated space for storing the fire extinguishing agent is required in the structure. In contrast, according to the above-mentioned configuration 1), the fire extinguishing agent is used as the working medium of the ORC cycle (2), so the dedicated space is not required.

[0095] 2) In some embodiments, the fire extinguishing system (1) described in 1) above, The at least one extinguishing agent supply line (3) The liquid extinguishing agent supply line (3A) is for sending the liquid extinguishing agent from the ORC cycle (2) to the at least one fire-protection object (10), and includes one end (31A) of the liquid extinguishing agent supply line (3A) connected downstream of the condenser (21) on the ORC cycle (2) and upstream of the vaporizer (23).

[0096] According to the above configuration 2), the liquid fire-extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 through the liquid fire-extinguishing agent supply line 3A. The liquid fire-extinguishing agent sent to the fire-prevention object 10 has a low temperature below its liquefaction temperature, and therefore can absorb heat from the burning material (fire heat source) in the fire-prevention object 10 and lower its temperature below its ignition temperature. In other words, the liquid fire-extinguishing agent sent to the fire-prevention object 10 can cool and extinguish the fire in the fire-prevention object 10.

[0097] 3) In some embodiments, the fire extinguishing system (1) described in 1) above, The at least one extinguishing agent supply line (3) The gaseous fire-extinguishing agent supply line (3B) is for sending the gaseous fire-extinguishing agent from the ORC cycle (2) to the at least one fire-protection object (10), and includes a gaseous fire-extinguishing agent supply line (3B) having one end (31B) connected downstream of the vaporizer (23) on the ORC cycle (2) and upstream of the condenser (21).

[0098] According to the above configuration 3), the gaseous fire extinguishing agent can be sent from the ORC cycle 2 to the fire prevention object 10 through the gaseous fire extinguishing agent supply line 3B. The gaseous fire extinguishing agent sent to the fire prevention object 10 can cut off the supply of air to the burning material (fire heat source) in the fire prevention object 10 or dilute the oxygen concentration within the fire prevention object 10. In other words, the gaseous fire extinguishing agent sent to the fire prevention object 10 can extinguish a fire in the fire prevention object 10 by oxygen deficiency.

[0099] 4) In some embodiments, the fire extinguishing system (1) described in 1) above, The at least one extinguishing agent supply line (3) a liquid extinguishant supply line (3A) for supplying the liquid extinguishant from the ORC cycle (2) to the at least one fire prevention object (10), the liquid extinguishant supply line (3A) having one end (31A) connected to a side downstream of the condenser (21) and upstream of the vaporizer (23) on the ORC cycle (2); and a gaseous fire-extinguishing agent supply line (3B) for sending the gaseous fire-extinguishing agent from the ORC cycle (2) to the at least one fire-protection object, the gaseous fire-extinguishing agent supply line (3B) having one end (31B) connected downstream of the vaporizer (23) on the ORC cycle (2) and upstream of the condenser (21).

[0100] According to the above configuration 4), a liquid fire-extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 through the liquid fire-extinguishing agent supply line 3A, thereby enabling the fire in the fire-prevention object 10 to be cooled and extinguished. Also, a gaseous fire-extinguishing agent can be sent from the ORC cycle 2 to the fire-prevention object 10 through the gaseous fire-extinguishing agent supply line 3B, thereby enabling the fire in the fire-prevention object 10 to be extinguished by oxygen deficiency.

[0101] 5) In some embodiments, the fire extinguishing system (1) described in 4) above, the other end (32B) of the gaseous fire-extinguishing agent supply line (3B) is connected to a first fire-prevention object (10B) among the at least one fire-prevention object (10); The other end (32A) of the liquid fire extinguishant supply line (3A) is connected to a second fire prevention object (10A) different from the first fire prevention object (10B) among the at least one fire prevention object (10).

[0102] According to the configuration of 5) above, the fire extinguishing system (1) selects whether to send a liquid fire extinguishing agent through the liquid fire extinguishing agent supply line (3A) or a gaseous fire extinguishing agent through the gaseous fire extinguishing agent supply line (3B) for each fire prevention object 10 that is the fire extinguishing target. Specifically, among the multiple fire extinguishing targets (fire prevention objects 10), for those fire extinguishing targets where people are permanently present and for which there is a concern that extinguishing a fire using a gaseous fire extinguishing agent at such targets may have adverse effects on the human body, the liquid fire extinguishing agent is sent through the liquid fire extinguishing agent supply line (3A), thereby eliminating the above-mentioned concern. In addition, for fire extinguishing targets where people are not permanently present, a gaseous fire extinguishing agent can be sent through the gaseous fire extinguishing agent supply line (3B).

[0103] Furthermore, the fire extinguishing equipment (1) described in 5) above can prevent the structure of the fire extinguishing equipment (1) from becoming more complex and can reduce the power consumption for sending the refrigerant to the condenser, compared to a structure in which the gaseous fire extinguishing agent flowing through the gaseous fire extinguishing agent supply line (3B) is liquefied by a condenser (fire extinguishing condenser 39) and then sent to the extinguishing target (second fire prevention object 10A) that is the target of fire extinguishing by liquid fire extinguishing agent.

[0104] 6) In some embodiments, the fire extinguishing system (1) described in 3) above, The at least one extinguishing agent supply line (3) a branch line (38) having one end (381) connected to the gaseous fire-extinguishing agent supply line (3B), the branch line (38) including a fire-extinguishing condenser (39) for liquefying the gaseous fire-extinguishing agent provided on the branch line (38); the other end (32B) of the gaseous fire-extinguishing agent supply line (3B) is connected to a first fire-prevention object (10B) among the at least one fire-prevention object (10); The other end (382) of the branch line (38) is connected to a second fire prevention object (10A) different from the first fire prevention object (10B) among the at least one fire prevention object (10).

[0105] According to the configuration of 6) above, the fire extinguishing system (1) selects whether to send a liquid fire extinguishing agent through the liquid fire extinguishing agent supply line (3A) or a gaseous fire extinguishing agent through the gaseous fire extinguishing agent supply line (3B) for each fire prevention object 10 that is the target of fire extinguishing. Specifically, for those fire prevention objects 10 that are manned and for which there is concern about the impact on the human body if a gaseous fire extinguishing agent is used for extinguishing a fire at such an object, the fire extinguishing agent is liquefied by the fire extinguishing condenser (39) provided on the branch line (38), thereby eliminating the concern. Furthermore, for fire prevention objects that are not manned, the gaseous fire extinguishing agent can be sent through the gaseous fire extinguishing agent supply line (3B).

[0106] 7) In some embodiments, the fire extinguishing system (1) according to any one of 2), 4) or 5) above, The one end (31A) of the liquid extinguishant supply line (3A) was connected to the ORC cycle (2) downstream of the booster pump (22) and upstream of the vaporizer (23).

[0107] According to the above configuration 7), when the liquid fire extinguishing agent is fed to the object to be protected from fire (10) through the liquid fire extinguishing agent supply line (3A), the boosting effect of the booster pump (22) on the fire extinguishing agent can be utilized.

[0108] 8) In some embodiments, the fire extinguishing system (1) according to any one of 2), 4), 5) or 7) above, The liquid extinguishant supply line (3A) includes an auxiliary pump (35) provided on the liquid extinguishant supply line (3A) for increasing the pressure of the liquid extinguishant flowing through the liquid extinguishant supply line (3A).

[0109] According to the configuration of 8), when the boost pump (22) alone cannot provide a sufficient boost to supply the liquid fire extinguishant through the liquid fire extinguishant supply line (3A) to the fire prevention object (10), the auxiliary pump (35) can be provided to ensure a sufficient boost to supply the liquid fire extinguishant to the fire prevention object (10). Furthermore, according to the configuration of 8), it is not necessary to ensure a sufficient boost to supply the liquid fire extinguishant only with the boost pump (22), which can prevent the boost pump (22) from becoming large and expensive.

[0110] 9) In some embodiments, the fire extinguishing system (1) according to any one of 3) to 6) above, The ORC cycle (2) is the bypass line (27) bypassing the expansion turbine (24), the bypass line (27) having one end connected to a location downstream of the evaporator (23) and upstream of the expansion turbine (24) on the ORC cycle (2), and the other end connected to a location downstream of the expansion turbine (24) and upstream of the condenser (21) on the ORC cycle (2), The one end (31B) of the gaseous fire-extinguishing agent supply line (3B) was connected to the bypass line (27).

[0111] According to the above configuration 9), the gaseous fire-extinguishing agent flowing through the bypass line (27) is not expanded in the expansion turbine (24), and the boosting action of the boost pump (22) remains. Therefore, when the gaseous fire-extinguishing agent is sent to the fire-protection target (10) through the bypass line (27) and the gaseous fire-extinguishing agent supply line (3B), the boosting action of the boost pump (22) can be utilized.

[0112] 10) In some embodiments, the fire extinguishing system (1) according to any one of 3) to 6) or 9) above, The gaseous fire-extinguishing agent supply line (3B) includes an auxiliary compressor (36) provided on the gaseous fire-extinguishing agent supply line (3B) for increasing the pressure of the gaseous fire-extinguishing agent flowing through the gaseous fire-extinguishing agent supply line (3B).

[0113] According to the configuration 10), when the boost pump (22) alone cannot provide a sufficient boost to send the gaseous fire extinguishing agent to the fire prevention object (10) through the gaseous fire extinguishing agent supply line (3B), the auxiliary compressor (36) can be provided to ensure a sufficient boost to send the gaseous fire extinguishing agent to the fire prevention object (10). Furthermore, according to the configuration 10), it is not necessary to provide a sufficient boost to the boost pump (22) alone, which can prevent the boost pump (22) from becoming large and expensive.

[0114] 11) In some embodiments, the fire extinguishing system (1) according to any one of 1) to 10) above, an intermediate cycle (6) configured to circulate a third heat transfer medium; The intermediate cycle (6) an intermediate cycle side cooler (61) provided on the intermediate cycle (6) and configured to transfer cold energy from the first heat medium to the third heat medium; an intermediate-cycle boost pump (62) provided downstream of the intermediate-cycle cooler (61) in the intermediate cycle (6) for boosting the pressure of the third heat medium; an intermediate-cycle-side heater (63) provided in the intermediate cycle (6) downstream of the intermediate-cycle-side boost pump (62) and upstream of the intermediate-cycle-side cooler (61), and configured to transfer thermal energy from the fourth heat medium to the third heat medium to raise the temperature thereof, The condenser (21) is provided downstream of the intermediate-cycle-side boost pump (62) and upstream of the intermediate-cycle-side heater (63) in the intermediate cycle (6), and is configured to perform heat exchange between the gaseous fire-extinguishing agent flowing through the ORC cycle (2) and the third heat medium flowing through the intermediate cycle (6).

[0115] According to the above configuration 11), the provision of the intermediate cycle (6) makes it easier to adjust the temperature and pressure of the extinguishing agent flowing through the ORC cycle (2), thereby improving the controllability of the ORC cycle (2).

[0116] 12) In some embodiments, the fire extinguishing system (1) according to any one of 1) to 11) above, The booster pump (22) is configured so that the pressure ratio can be adjusted.

[0117] According to the configuration of 12), the pressure of the liquid fire extinguishing agent discharged from the booster pump (22) can be adjusted by adjusting the pressure ratio of the booster pump (22), and the delivery distance of the fire extinguishing agent can be adjusted. In this case, the delivery distance of the fire extinguishing agent can be increased compared to a conventional configuration in which nitrogen gas is delivered to the target of fire extinguishing by the internal pressure of a cylinder, thereby improving the degree of freedom in layout of the fire extinguishing system (1) in the structure (11).

[0118] 13) In some embodiments, the fire extinguishing system (1) according to 12) above, a fire alarm (7) provided in the at least one fire prevention object (10); a flow control valve (34A, 34B) provided on the at least one extinguishing agent supply line (3); When a fire alarm signal is received from the fire alarm (7), The flow rate adjusting valves (34A, 34B) are opened and the pressure ratio of the boost pump (22) is increased.

[0119] According to the configuration of 13), during steady state when no fire has occurred, the pressure ratio of the boost pump (22) is set low, thereby suppressing an increase in the power consumption of the ORC cycle (2) and enabling economical operation of the ORC cycle (2). When a fire has occurred in the fire-protected object (10), a fire alarm signal transmitted from the fire alarm (7) is received, and the flow control valves (34A, 34B) are opened to increase the pressure ratio of the boost pump (22). This increases the discharge pressure of the boost pump (22) to an appropriate pressure for delivering the fire-extinguishing agent to the fire-protected object (10), thereby enabling the delivery of just the right amount of fire-extinguishing agent to the fire-protected object (10).

[0120] 14) In some embodiments, the fire extinguishing system (1) according to any one of 1) to 13) above, Each of the at least one fire prevention object (10) has an internal space (100) into which the fire extinguishing agent is introduced, the ORC cycle (2) further includes a fire-extinguishing agent storage tank (25) that is provided on the ORC cycle (2) downstream of the condenser (21) and upstream of the booster pump (22), and that is configured to store the liquid fire-extinguishing agent obtained by liquefying the gaseous fire-extinguishing agent in the condenser (21); The fire extinguishing equipment (1) a first fire extinguishing equipment condenser (91) configured to transfer cold energy from a fifth heat medium to the fire extinguishing agent sprayed into the internal space (100) to liquefy the fire extinguishing agent; The fire extinguishing system further includes a liquid fire extinguishing agent recovery line (92) for guiding the fire extinguishing agent liquefied in the first fire extinguishing equipment condenser (91) to the fire extinguishing agent storage tank (25).

[0121] According to the above configuration 14), the extinguishing agent sprayed into the internal space (100) of the fire prevention object (10) can be liquefied and then returned to the extinguishing agent storage tank (25). In this case, the extinguishing agent sprayed into the internal space (100) can be collected and reused, thereby reducing the consumption of expensive extinguishing agent and improving the economic efficiency of the fire extinguishing system (1).

[0122] 15) In some embodiments, the fire extinguishing system (1) according to any one of 1) to 13) above, Each of the at least one fire prevention object (10) has an internal space (100) into which the fire extinguishing agent is introduced, the ORC cycle (2) further includes a fire-extinguishing agent storage tank (25) that is provided on the ORC cycle (2) downstream of the condenser (21) and upstream of the booster pump (22), and that is configured to store the liquid fire-extinguishing agent obtained by liquefying the gaseous fire-extinguishing agent in the condenser (21); The fire extinguishing equipment (1) a gaseous fire-extinguishing agent recovery line (94) for removing the gas containing the fire-extinguishing agent sprayed into the internal space (100) from the internal space (100) and returning the liquefied fire-extinguishing agent to the fire-extinguishing agent storage tank (25); The gaseous fire extinguishing agent recovery line (94) a second fire extinguishing equipment-side condenser (95) provided on the gaseous fire extinguishing agent recovery line (94), the second fire extinguishing equipment-side condenser (95) configured to transfer cold energy from a sixth heat medium to the gas flowing through the gaseous fire extinguishing agent recovery line (94) to liquefy the fire extinguishing agent; and a gas-liquid separator (96) provided on the gaseous fire extinguishing agent recovery line (94) downstream of the second fire extinguishing equipment condenser (95), the gas-liquid separator (96) configured to separate the fire extinguishing agent liquefied in the second fire extinguishing equipment condenser (95) from the gas.

[0123] According to the above configuration 15), the extinguishing agent sprayed into the internal space (100) of the fire prevention object (10) can be liquefied, separated from the air, and then returned to the extinguishing agent storage tank (25). In this case, by recovering the extinguishing agent from the air containing the sprayed extinguishing agent, the consumption of the expensive extinguishing agent can be reduced, thereby improving the economic efficiency of the fire extinguishing system (1). [Explanation of symbols]

[0124] 1 Fire extinguishing equipment 2 ORC cycle 3. Fire extinguishing agent supply line 3A Liquid extinguishing agent supply line 3B Gaseous fire extinguishing agent supply line 4. First heat medium supply line 5. Second heat transfer medium supply line 6 Intermediate Cycle 7. Fire alarm 10, 10A, 10B Fire prevention objects 11 Structures 21 Condenser 22 Booster pump 23 Vaporizer 24 Expansion turbine 25 Fire extinguishing agent storage tank 26 Generator 27 Bypass Line 28 Bypass valve 28A three-way valve 31A, 31B One end (upstream end) 32A, 32B other end (downstream end) 33A, 33B Fire extinguishing agent nozzle 34A First flow control valve 34B Second flow control valve 35 Auxiliary pump 36 Auxiliary compressor 37 Electric motor 38 Branch Line 39 Fire extinguishing condenser 41 First heat medium tank 42 First heat transfer pump 51 Second heat medium tank 52 Second heat transfer medium pump 61 Intermediate cycle side cooler 62 Intermediate cycle side booster pump 63 Intermediate cycle side heater 64 Intermediate cycle storage tank

Claims

1. An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; an ORC cycle including: at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and delivering it to at least one object to be protected from fire; an intermediate cycle configured to circulate a third heat medium; The intermediate cycle comprises: an intermediate cycle side cooler provided on the intermediate cycle and configured to transfer cold energy from the first heat medium to the third heat medium; an intermediate cycle side boost pump provided downstream of the intermediate cycle side cooler in the intermediate cycle for boosting the pressure of the third heat medium; an intermediate cycle side heater provided in the intermediate cycle downstream of the intermediate cycle side boost pump and upstream of the intermediate cycle side cooler, the intermediate cycle side heater being configured to transfer thermal energy from the fourth heat medium to the third heat medium to raise the temperature thereof, the condenser is provided downstream of the intermediate cycle boost pump and upstream of the intermediate cycle heater in the intermediate cycle, and is configured to perform heat exchange between the gaseous fire-extinguishing agent flowing through the ORC cycle and the third heat medium flowing through the intermediate cycle. Fire extinguishing equipment.

2. The at least one extinguishing agent supply line a liquid extinguishing agent supply line for supplying the liquid extinguishing agent from the ORC cycle to the at least one fire protection object, the liquid extinguishing agent supply line having one end connected to a downstream side of the condenser and an upstream side of the vaporizer on the ORC cycle; The fire extinguishing system according to claim 1.

3. The at least one extinguishing agent supply line a gaseous fire-extinguishing agent supply line for supplying the gaseous fire-extinguishing agent from the ORC cycle to the at least one fire-protection object, the gaseous fire-extinguishing agent supply line having one end connected to a downstream side of the vaporizer and an upstream side of the condenser on the OR cycle; The fire extinguishing system according to claim 1.

4. The at least one extinguishing agent supply line a liquid fire-extinguishing agent supply line for supplying the liquid fire-extinguishing agent from the ORC cycle to the at least one fire-protection object, the liquid fire-extinguishing agent supply line having one end connected to a downstream side of the condenser and an upstream side of the vaporizer on the ORC cycle; a gaseous fire-extinguishing agent supply line for supplying the gaseous fire-extinguishing agent from the ORC cycle to the at least one fire-protection object, the gaseous fire-extinguishing agent supply line having one end connected to a downstream side of the vaporizer and an upstream side of the condenser on the ORC cycle; The fire extinguishing system according to claim 1.

5. the other end of the gaseous fire extinguishing agent supply line is connected to a first fire prevention object among the at least one fire prevention object, The other end of the liquid fire extinguishing agent supply line is connected to a second fire prevention object different from the first fire prevention object among the at least one fire prevention object. The fire extinguishing system according to claim 4.

6. An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; an ORC cycle including: at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and delivering it to at least one object to be protected from fire; The at least one extinguishing agent supply line a gaseous fire-extinguishing agent supply line for supplying the gaseous fire-extinguishing agent from the ORC cycle to the at least one fire-protection object, the gaseous fire-extinguishing agent supply line having one end connected to a downstream side of the vaporizer and an upstream side of the condenser on the ORC cycle; The at least one extinguishing agent supply line a branch line connected at one end to the gaseous fire-extinguishing agent supply line, the branch line including a fire-extinguishing condenser provided on the branch line for liquefying the gaseous fire-extinguishing agent; the other end of the gaseous fire extinguishing agent supply line is connected to a first fire prevention object among the at least one fire prevention object, The other end of the branch line is connected to a second fire prevention object different from the first fire prevention object among the at least one fire prevention object. Fire extinguishing equipment.

7. The one end of the liquid extinguishing agent supply line is connected to the ORC cycle downstream of the boost pump and upstream of the vaporizer.

6. A fire extinguishing system according to claim 2, 4 or 5.

8. the liquid extinguishing agent supply line includes an auxiliary pump provided on the liquid extinguishing agent supply line for increasing the pressure of the liquid extinguishing agent flowing through the liquid extinguishing agent supply line; 8. The fire extinguishing system according to claim 2, 4, 5 or 7.

9. An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; an ORC cycle including: at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and delivering it to at least one object to be protected from fire; The at least one extinguishing agent supply line a gaseous fire-extinguishing agent supply line for supplying the gaseous fire-extinguishing agent from the ORC cycle to the at least one fire-protection object, the gaseous fire-extinguishing agent supply line having one end connected to a downstream side of the vaporizer and an upstream side of the condenser on the ORC cycle; The ORC cycle comprises: a bypass line that bypasses the expansion turbine, the bypass line having one end connected to a position downstream of the vaporizer and upstream of the expansion turbine on the ORC cycle, and the other end connected to a position downstream of the expansion turbine and upstream of the condenser on the ORC cycle; The one end of the gaseous fire extinguishing agent supply line is connected to the bypass line. Fire extinguishing equipment.

10. the gaseous fire-extinguishing agent supply line includes an auxiliary compressor provided on the gaseous fire-extinguishing agent supply line for increasing the pressure of the gaseous fire-extinguishing agent flowing through the gaseous fire-extinguishing agent supply line; The fire extinguishing system according to any one of claims 3 to 6 or 9.

11. an intermediate cycle configured to circulate a third heat medium; The intermediate cycle comprises: an intermediate cycle side cooler provided on the intermediate cycle and configured to transfer cold energy from the first heat medium to the third heat medium; an intermediate cycle side boost pump provided downstream of the intermediate cycle side cooler in the intermediate cycle for boosting the pressure of the third heat medium; an intermediate cycle side heater provided in the intermediate cycle downstream of the intermediate cycle side boost pump and upstream of the intermediate cycle side cooler, the intermediate cycle side heater being configured to transfer thermal energy from the fourth heat medium to the third heat medium to raise the temperature thereof, the condenser is provided downstream of the intermediate cycle boost pump and upstream of the intermediate cycle heater in the intermediate cycle, and is configured to perform heat exchange between the gaseous fire-extinguishing agent flowing through the ORC cycle and the third heat medium flowing through the intermediate cycle. The fire extinguishing system according to claim 6 or 9.

12. The boost pump is configured to be able to adjust the pressure ratio. A fire extinguishing system according to any one of claims 1 to 11.

13. a fire alarm provided in the at least one fire prevention object; a flow control valve provided on the at least one extinguishing agent supply line; When a fire alarm signal is received from the fire alarm, configured to open the flow control valve and increase the pressure ratio of the boost pump; The fire extinguishing system according to claim 12.

14. An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; an ORC cycle including: and at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and sending it to at least one fire protection object, Each of the at least one fire prevention object has an internal space into which the fire extinguishing agent is introduced, The ORC cycle further includes a fire extinguishing agent storage tank that is provided downstream of the condenser and upstream of the booster pump on the OR cycle and is configured to store the liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser, a first fire extinguishing equipment condenser configured to transfer cold energy from a fifth heat medium to the fire extinguishing agent sprayed into the internal space to liquefy the fire extinguishing agent; a liquid extinguishing agent recovery line for guiding the extinguishing agent liquefied in the first fire extinguishing equipment condenser to the extinguishing agent storage tank, Fire extinguishing equipment.

15. An ORC cycle configured to circulate a fire extinguishing agent as a working medium, a condenser provided on the ORC cycle and configured to transfer cold energy from the first heat medium to the gaseous fire extinguishing agent to liquefy the gaseous fire extinguishing agent; a booster pump provided downstream of a condenser in the ORC cycle for boosting the pressure of a liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser; a vaporizer provided downstream of the boost pump in the ORC cycle and configured to transfer thermal energy from a second heat medium to the liquid fire-extinguishing agent to vaporize it; an expansion turbine provided downstream of the vaporizer and upstream of the condenser in the ORC cycle, the expansion turbine being driven by a gaseous fire extinguishing agent vaporized from the liquid fire extinguishing agent; an ORC cycle including: and at least one extinguishing agent supply line for extracting at least one of the liquid extinguishing agent or the gaseous extinguishing agent from the ORC cycle and sending it to at least one fire protection object, Each of the at least one fire prevention object has an internal space into which the fire extinguishing agent is introduced, The ORC cycle further includes a fire extinguishing agent storage tank that is provided downstream of the condenser and upstream of the booster pump on the OR cycle and is configured to store the liquid fire extinguishing agent obtained by liquefying the gaseous fire extinguishing agent in the condenser, a gaseous fire-extinguishing agent recovery line for removing the gas containing the fire-extinguishing agent sprayed into the internal space from the internal space and returning the liquefied fire-extinguishing agent to the fire-extinguishing agent storage tank; The gaseous fire extinguishing agent recovery line includes: a second fire extinguishing equipment-side condenser provided on the gaseous fire extinguishing agent recovery line, the second fire extinguishing equipment-side condenser configured to transfer cold energy from a sixth heat medium to the gas flowing through the gaseous fire extinguishing agent recovery line to liquefy the fire extinguishing agent; a gas-liquid separator provided downstream of the second fire extinguishing equipment condenser on the gaseous fire extinguishing agent recovery line, the gas-liquid separator configured to separate the extinguishing agent liquefied in the second fire extinguishing equipment condenser from the gas; Fire extinguishing equipment.

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