Standby cold source system for underground combat readiness engineering

Abstract

The present invention discloses a standby cold source system for underground war preparedness projects, which includes a first heat exchange module for heat exchange with the chilled water of a central air conditioner. The first heat exchange module includes a chilled water heat exchange module for heat exchange with the chilled water of the central air conditioner and a cold source output module for heat exchange with the chilled water heat exchange module. The cold source output module includes a cold source tank, and a cold source heat exchange module for heat exchange with the CO2 formed by the gasification of dry ice is provided in the cold source tank. The cold source heat exchange module includes a cold source pipe provided on the cold source tank and a first coolant provided in the cold source pipe. Using dry ice as the original cold source, heat exchange occurs between the sublimation of dry ice and the first coolant. The cooled first coolant flows to the chilled water heat exchange module for heat exchange with the chilled water of the central air conditioner, ultimately reducing the temperature of the chilled water of the central air conditioner and maintaining the normal use of the central air conditioner; moreover, the dry ice has a large heat absorption capacity, is easy to store and easy to prepare.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment, and particularly to a standby cold source system for underground war preparedness projects.

Background Art

[0002] Underground war preparedness projects are used to store materials of high strategic value, and these materials need to be stored in a constant temperature and humidity environment. Central air conditioners are divided into air-cooled central air conditioners and water-cooled central air conditioners. Among them, water-cooled central air conditioners are commonly used in areas with rich water sources, and air-cooled central air conditioners are commonly used in water-scarce areas. When an emergency occurs and the air-cooled host of the air-cooled central air conditioner or the host of the water-cooled central air conditioner or the cooling tower of the water-cooled central air conditioner is damaged, in order to maintain the normal operation of the central air conditioning system in the cave depot, a standby cold source system for underground war preparedness projects is urgently needed.

Summary of the Invention

[0003] In view of the need to maintain the normal operation of the central air conditioning system in the cave depot under emergency conditions for underground war preparedness projects, the present invention provides a standby cold source system for underground war preparedness projects, including a first heat exchange module that exchanges heat with the chilled water of the central air conditioner. The first heat exchange module includes a chilled water heat exchange module that exchanges heat with the chilled water of the central air conditioner and a cold source output module that exchanges heat with the chilled water heat exchange module. The cold source output module includes a cold source tank, and a cold source heat exchange module for exchanging heat with the carbon dioxide formed by the sublimation of dry ice is provided in the cold source tank. The cold source heat exchange module includes a cold source pipe provided on the cold source tank and a first coolant provided in the cold source pipe.

[0004] As an improvement of the above standby cold source system for underground war preparedness projects, the chilled water heat exchange module includes a first plate heat exchanger. A first heat exchange pipe communicated with the cold source pipe and a second heat exchange pipe communicated with the chilled water pipe of the central air conditioner are provided on the first plate heat exchanger. The first heat exchange pipe and the cold source pipe form a first circulation pipeline for the circulation of the first coolant, and the second heat exchange pipe and the chilled water pipe of the central air conditioner form a second circulation pipeline for the circulation of chilled water.

[0005] As an improvement of the above standby cold source system for underground war preparedness projects, a first circulation pump, a first temperature detector, a first filter, and a first flow valve are provided at one end of the first heat exchange pipe for outputting the first coolant, and a second temperature detector, a first expansion tank, and a second flow valve are provided at one end of the first heat exchange pipe for inputting the first coolant.

[0006] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, a second heat exchange module for heat exchange with the chilled water or cooling water of the central air conditioner is connected to the first heat exchange module, and an environmental heat exchange module for reducing the temperature of the exhaust gas in the underground combat readiness project is also included, which is respectively connected to the first heat exchange module and the second heat exchange module.

[0007] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, the second heat exchange module includes an auxiliary heat exchange module for heat exchange with the cooling water or chilled water of the central air conditioner and a cold storage module for heat exchange with the auxiliary heat exchange module. The cold storage module includes a cold storage tank communicated with the cold source tank. A cold storage heat exchange module for heat exchange with the input CO2 is arranged in the cold storage tank. The cold storage heat exchange module includes a heat preservation module and cold storage pipes arranged in the cold storage tank. A second coolant is arranged in the cold storage pipes.

[0008] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, the heat preservation module includes a liquid heat preservation part and a solid heat preservation part arranged in the cold storage tank.

[0009] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, the auxiliary heat exchange module includes a second plate heat exchanger. A third heat exchange pipe communicated with the cold storage pipes and a fourth heat exchange pipe communicated with the central air conditioner cooling water pipe or chilled water pipe are arranged on the second plate heat exchanger. The third heat exchange pipe and the cold storage pipes form a third circulation pipeline for the circulation of the second coolant, and the fourth heat exchange pipe and the central air conditioner cooling water pipe or chilled water pipe form a fourth circulation pipeline for the circulation of the cooling water or chilled water.

[0010] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, a second circulation water pump, a third temperature detector, a second filter and a third flow valve are arranged at one end of the third heat exchange pipe for outputting the second coolant, and a fourth temperature detector, a second expansion water tank and a fourth flow valve are arranged at one end of the third heat exchange pipe for inputting the second coolant.

[0011] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, a fifth temperature detector and a first pressure detector are arranged on the cold source tank, a sixth temperature detector, a second pressure detector and a liquid level gauge are arranged on the cold storage tank. A first gas transmission pipe is communicated between the cold source tank and the cold storage tank. One end of the first gas transmission pipe extends and inserts into the liquid heat preservation part, and a safety gas valve is arranged on the first gas transmission pipe.

[0012] As an improvement to the standby cold source system for the above-mentioned underground combat readiness project, the environmental heat exchange module includes a second gas transmission pipe respectively communicated with the cold source tank and the cold storage tank and extending towards the waste discharge port of the underground combat readiness project.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention provides a standby cold source system for underground war preparation engineering. Using dry ice as the original cold source, heat exchange occurs between the sublimation of dry ice and the first secondary refrigerant. The cooled first secondary refrigerant flows to the chilled water heat exchange module to exchange heat with the chilled water of the central air conditioner, ultimately reducing the temperature of the chilled water of the central air conditioner and maintaining the normal use of the central air conditioner; and the dry ice has a large heat absorption capacity, is easy to store, and is easy to prepare.

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0016] Figure 1 It is a schematic structural diagram of the standby cold source system for underground war preparation engineering of the present application;

[0017] Figure 2 It is a schematic structural diagram of the standby cold source system for underground war preparation engineering of the present application;

[0018] Figure 3 For Figure 2 The partial enlarged view at position A in ;

[0019] Figure 4 For Figure 2 The partial enlarged view at position B in ;

[0020] Figure 5 It is a schematic structural diagram of the cold source output module in the standby cold source system for underground war preparation engineering of the present application;

[0021] Figure 6 It is a schematic structural diagram of the chilled water heat exchange module in the standby cold source system for underground war preparation engineering of the present application;

[0022] Figure 7 For Figure 2 The partial enlarged view at position C in ;

[0023] Figure 8 For Figure 2 The partial enlarged view at position D in ;

[0024] Figure 9 It is a schematic structural diagram of the cold storage module in the standby cold source system for underground war preparation engineering of the present application;

[0025] Figure 10 It is a schematic structural diagram of the auxiliary heat exchange module in the standby cold source system for underground war preparation engineering of the present application.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] Such as Figure 1-10 The standby cold source system for underground combat engineering shown includes a first heat exchange module 1 that exchanges heat with the chilled water of the central air conditioner. The first heat exchange module 1 includes a chilled water heat exchange module 11 that exchanges heat with the chilled water of the central air conditioner and a cold source output module 12 that exchanges heat with the chilled water heat exchange module 11. The cold source output module 12 includes a cold source tank 121. Dry ice 122 is provided in the cold source tank 121, and a cold source heat exchange module 123 that exchanges heat with the CO₂ formed by the sublimation of the dry ice 122 is provided. The cold source heat exchange module 123 includes a cold source pipe 1231 provided on the cold source tank 121 and a first coolant provided in the cold source pipe 1231. Specifically, the cold source tank 121 is made of steel suitable for -50°C to -180°C, preferably steel at -80°C, to ensure an adiabatic state and reduce cold loss. When an emergency occurs and the air-conditioning host or the cooling tower of the water-cooled central air conditioner is damaged, and the chilled water of the central air conditioner cannot be cooled and thus cannot refrigerate, the standby cold source system for underground combat engineering of the present invention intervenes as a standby cold source in the central air conditioner. The dry ice 122 sublimes and exchanges heat with the first coolant. The cooled first coolant flows to the chilled water heat exchange module 11 to exchange heat with the chilled water of the central air conditioner, ultimately reducing the temperature of the chilled water of the central air conditioner and maintaining the normal use of the central air conditioner; and the dry ice 122 has a large heat absorption capacity, is easy to store and is easy to prepare.

[0028] Specifically, the chilled water heat exchange module 11 includes a first plate heat exchanger 111. A first heat exchange pipe 112 communicating with the cold source pipe 1231 and a second heat exchange pipe 113 communicating with the chilled water pipe of the central air conditioner are provided on the first plate heat exchanger 111. The first heat exchange pipe 112 and the cold source pipe 1231 form a first circulation pipeline for the first coolant to circulate, and the second heat exchange pipe 113 and the chilled water pipe of the central air conditioner form a second circulation pipeline for the chilled water to circulate. This structure forms two heat exchange circulation loops, and the temperature of the chilled water of the central air conditioner is reduced through two heat exchanges. The structure is simple and the implementation is convenient.

[0029] Further, at one end of the first heat exchange tube 112 for outputting the first secondary refrigerant, there are provided a first circulation water pump 4, a first temperature detector 5, a first filter 6, and a first flow valve 7. The first circulation water pump 4 causes the first secondary refrigerant to circulate within the first circulation pipeline. The first temperature detector 5 is used to detect the temperature of the first secondary refrigerant flowing out of the cold source pipe 1231. The first filter 6 is used to filter the first secondary refrigerant. The first flow valve 7 is used to control the flow rate of the first secondary refrigerant flowing out of the cold source pipe 1231. At one end of the first heat exchange tube 112 for inputting the first secondary refrigerant, there are provided a second temperature detector 8, a first expansion water tank 9, and a second flow valve 10. The second temperature detector 8 is used to monitor the temperature of the first secondary refrigerant flowing into the cold source pipe 1231. The first expansion water tank 9 can retain the increased part after the volume of the first secondary refrigerant increases due to heat absorption and temperature rise. The second flow valve 10 is used to control the flow rate of the first secondary refrigerant flowing into the cold source pipe 1231.

[0030] Further, at one end of the first heat exchange tube 112 for inputting the first secondary refrigerant, there is provided a first electronic processing instrument or a first chemical dosing device.

[0031] Central air conditioners are divided into air-cooled central air conditioners and water-cooled central air conditioners. Among them, the water-cooled central air conditioner includes a chilled water circulation system, a cooling water circulation system, and a host system. Specifically, the chilled water circulation system is composed of a chilled water pump, indoor fans, chilled water pipes, etc. The low-temperature chilled water flowing out of the host evaporator is pressurized by the chilled water pump and sent into the chilled water pipes, enters the room for heat exchange, takes away the heat in the room, and finally returns to the host evaporator. Specifically, the cooling water circulation system is composed of a cooling water pump, cooling water pipes, a cooling water tower, etc. After the chilled water in the chilled water circulation system exchanges heat with the indoor environment, its temperature rises. The heat energy of the chilled water is transferred to the cooling water through the refrigerant in the host. The temperature of the cooling water rises. The cooling water pump pumps the heated cooling water into the cooling water tower, exchanges heat with the atmosphere, reduces the temperature, and then sends it back to the host condenser. Specifically, the host system is composed of a compressor, an evaporator, a condenser, and a refrigerant. The circulation process is as follows: The low-pressure gaseous refrigerant is pressurized by the compressor and enters the condenser, gradually condensing into a high-pressure liquid. During the condensation process, a large amount of heat energy is released by the refrigerant, and this part of the heat energy is absorbed by the cooling water and sent to the outdoor cooling tower to be released into the atmosphere. The high-pressure liquid refrigerant in the condenser forms a gas-liquid mixture and enters the evaporator. The refrigerant sublimates and absorbs the heat in the chilled water, causing the chilled water to reach a lower temperature. Among them, the air-cooled central air conditioner includes an evaporator, a compressor, a condenser, and a capillary tube. The circulation process is as follows: The low-pressure gaseous refrigerant is pressurized by the compressor and enters the condenser, gradually condensing into a high-pressure liquid. During the condensation process, a large amount of heat energy is released by the refrigerant, and this part of the heat energy is discharged into the atmosphere and exchanges heat with the atmosphere. The high-pressure liquid refrigerant in the condenser forms a gas-liquid mixture and enters the evaporator. The refrigerant sublimates and absorbs the heat in the chilled water, causing the chilled water to reach a lower temperature.

[0032] Furthermore, a second heat exchange module 2 for heat exchange with chilled water or cooling water of a central air conditioner is connected to the first heat exchange module 1.

[0033] Specifically, when a water-cooled central air conditioner is used in an underground combat readiness project, in case of an emergency where the cooling tower is damaged or the cooling tower is shut down to avoid the specific location of the underground combat readiness project being detected by satellites on the ground, in order to maintain the normal use of the central air conditioner, the second heat exchange module 2 in the present invention needs to be involved in the central air conditioner, so that the second heat exchange module 2 exchanges heat with the chilled water circulation system to maintain the normal use of the central air conditioner; at the same time, the first heat exchange module 1 exchanges heat with the chilled water system, which can reduce the temperature rise of the cooling water and the working load of the main engine, enabling the entire central air conditioner to continuously operate at a low load.

[0034] Specifically, when a water-cooled central air conditioner or an air-cooled central air conditioner is used in an underground combat readiness project and the main engine of the air conditioner is damaged in case of an emergency, the second heat exchange module 2 exchanges heat with the chilled water of the central air conditioner, which will accelerate the cooling speed of the chilled water of the central air conditioner and improve the refrigeration efficiency. At the same time, when the dry ice 122 in the chilled water heat exchange module 11 cannot be replenished in time, the second heat exchange module 2 serves as a backup cold source to enable the central air conditioner to continue operating, further improving the stability of the cooling supply.

[0035] Furthermore, an environmental heat exchange module 3 for reducing the temperature of the waste gas in the underground combat readiness project is also included, which is respectively connected to the first heat exchange module 1 and the second heat exchange module 2. Specifically, the environmental heat exchange module 3 includes a second gas pipeline 140 that is respectively connected to the cold source tank 121 and the cold storage tank 221 and extends towards the waste gas discharge port of the underground combat readiness project. In a combat readiness state, the generator will operate continuously at a high load, inevitably generating a large amount of waste heat. In the ventilation design of the underground depot project, the waste heat is discharged outside the depot through pipelines, which is very easy to be detected by high-altitude satellites. In the present invention, the sublimated low-temperature CO2 is diverted to the waste gas discharge port of the combat readiness project through the second gas pipeline 140 connected to the first heat exchange module 1 and the second heat exchange module 2 to reduce the temperature of the waste gas at the discharge port, making the waste gas temperature consistent with the ambient temperature and avoiding heat radiation being detected by satellites.

[0036] Specifically, the second heat exchange module 2 includes an auxiliary heat exchange module 21 that exchanges heat with the chilled water or frozen water of the central air conditioner, and a cold storage module 22 that exchanges heat with the auxiliary heat exchange module 21. The cold storage module 22 includes a cold storage tank 221 communicated with the cold source tank 121. Specifically, a first gas transmission pipe 130 is communicated between the cold source tank 121 and the cold storage tank 221. Specifically, the cold storage tank 221 is made of stainless steel. A cold storage heat exchange module 222 that exchanges heat with the CO2 input therein is provided in the cold storage tank 221. The cold storage heat exchange module 222 includes a heat preservation module 2221 and cold storage pipes 2222 provided in the cold storage tank 221. A second coolant is provided in the cold storage pipes 2222. The heat preservation module 2221 includes a liquid heat preservation part 22211 and a solid heat preservation part 22212 provided in the cold storage tank 221. One end of the first gas transmission pipe 130 extends and inserts into the liquid heat preservation part 22211. A plurality of round holes are provided in the part of the first gas transmission pipe 130 inserted into the liquid heat preservation part 22211. A safety gas valve is provided on the first gas transmission pipe 130. Specifically, the liquid heat preservation part 22211 is water, and the solid heat preservation part 22212 is polyurethane of Class B1. The low-temperature CO2 in the cold source tank 121 flows into the cold storage tank 221 through the first gas transmission pipe 130 and exchanges heat with the second coolant and the liquid heat preservation part 22211 in the cold storage tank 221. The cooled second coolant flows to the auxiliary heat exchange module 21 to exchange heat with the chilled water or frozen water of the central air conditioner to maintain the normal use of the central air conditioner; at the same time, the heat preservation module 2221 is used to store the excess cold, extend the refrigeration time, improve the sustainability and effect of refrigeration.

[0037] Specifically, the auxiliary heat exchange module 21 includes a second plate heat exchanger 211. A third heat exchange pipe 212 communicated with the cold storage pipes 2222 and a fourth heat exchange pipe 213 communicated with the chilled water pipe or frozen water pipe of the central air conditioner are provided on the second plate heat exchanger 211. The third heat exchange pipe 212 and the cold storage pipes 2222 form a third circulation pipeline for the circulation of the second coolant, and the fourth heat exchange pipe 213 and the chilled water pipe or frozen water pipe of the central air conditioner form a fourth circulation pipeline for the circulation of the chilled water or frozen water. This structure forms two heat exchange circulation loops, and the temperature of the chilled water or frozen water of the central air conditioner is reduced through two heat exchanges. The structure is simple and the implementation is convenient.

[0038] Further, at one end of the third heat exchange tube 212 where the second secondary coolant is output, there are a second circulation water pump 20, a third temperature detector 30, a second filter 40, and a third flow valve 50. Among them, the second circulation water pump 20 enables the second secondary coolant to circulate within the third circulation pipeline. The third temperature detector 30 is used to monitor the temperature of the second secondary coolant flowing out of the cold storage tube 2222. The second filter 40 is used to filter the second secondary coolant. The third flow valve 50 is used to control the flow rate of the second secondary coolant flowing out of the cold storage tube 2222. At one end of the third heat exchange tube 212 where the second secondary coolant is input, there are a fourth temperature detector 60, a second expansion water tank 70, and a fourth flow valve 80. The fourth temperature detector 60 is used to monitor the temperature of the second secondary coolant flowing into the cold storage tube 2222. The second expansion water tank 70 retains the increased part when the volume of the second secondary coolant increases due to heat absorption and temperature rise. The fourth flow valve 80 is used to control the flow rate of the second secondary coolant flowing into the cold storage tube 2222.

[0039] Further, at one end of the third heat exchange tube 212 where the second secondary coolant is input, there is a second electronic processing instrument or a second chemical dosing device.

[0040] Further, a fifth temperature detector 90 and a first pressure detector 100 are provided on the cold source tank 121. Specifically, the first pressure detector 100 is a pressure gauge. When the reading of the first pressure detector 100 is greater than 0.3 MPa, the safety air valve is opened, and the low-temperature CO2 formed by the sublimation of the dry ice 122 no longer enters the cold storage tank 221 through the first gas transmission pipe 130, but directly flows into the second gas transmission pipe 140 through this safety valve. A sixth temperature detector 110, a second pressure detector 120, and a liquid level gauge 160 are provided on the cold storage tank 221. The sixth temperature detector 110 is used to monitor whether the liquid heat insulation part 22211 freezes to prevent blocking the first gas transmission pipe 130. The liquid level gauge 160 is used to monitor the water level in the cold storage tank 221 and replenish it in time when the water level is too low. The second pressure detector 120 is used to monitor the pressure in the cold storage tank 221. When the pressure value is greater than 0.15 Pa, the input of low-temperature CO2 into the cold storage tank 221 is stopped.

[0041] Specifically, both the first secondary coolant and the second secondary coolant are ethylene glycol aqueous solutions with a mass concentration of 60%.

[0042] According to the ASHRAE Handbook 2005, an ethylene glycol aqueous solution with an ethylene glycol mass concentration of 60% is selected as the secondary coolant. The ethylene glycol volume concentration is 57.8%, the freezing point is -48.3 °C, the boiling point is 110 °C, and the pressure is 1 standard atmosphere. The return liquid temperature of the ethylene glycol aqueous solution is controlled at 5 °C, and the supply liquid temperature is 0 °C.

[0043]

[0044] Specifically, the supply temperature of the first secondary refrigerant reaches -8°C, and the return temperature is -3°C.

[0045] Working principle of the standby cold source system for underground war preparedness projects: After sublimation in the cold source tank, dry ice exchanges heat with the first secondary refrigerant flowing in the cold source pipe, and the first secondary refrigerant then exchanges heat with the chilled water of the central air conditioner; at the same time, the sublimated low-temperature CO2 can enter the cold storage tank through the first gas transmission pipe and exchange heat with the second secondary refrigerant in the cold storage pipe, and the second secondary refrigerant then exchanges heat with the cooling water of the central air conditioner, realizing that in the event of a failure of the central air conditioner or outdoor cooling tower in an emergency state, the temperature and humidity in the cave war preparedness material warehouse are still within an appropriate range; at the same time, the sublimated low-temperature CO2 can extend through the second gas transmission pipe to the waste discharge port of the underground war preparedness project to reduce the temperature of the waste discharge port and avoid satellite detection of the location of the underground project.

[0046] A method for providing a standby cold source for an underground war preparedness project, the steps are as follows: In an emergency state, purchase dry ice from a strategically cooperative unit as the cold source of the standby cold source system for the underground war preparedness project, transport it to the outside of the cave air defense door by a cold chain vehicle, and underground war preparedness staff use an electric forklift (pallet jack, flatbed truck) to send the dry ice blocks with insulation boxes to the buffer room, place them on the automatic conveyor near the feeding port, and use a robotic fork or manually remove the insulation boxes outside the dry ice blocks, and put the dry ice into the dry ice storage tank.

[0047] It should be understood that in this application, terms such as "first" and "second" are used to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information. In addition, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0048] As described above, one or more implementation manners are provided in combination with specific content, and it is not determined that the specific implementation of this application is only limited to these descriptions. Any approximation, similarity to the method, structure, etc. of this application, or several technical deductions or replacements made under the premise of the concept of this application should be regarded as the protection scope of this application.

Claims

1. A standby cold source system for underground war preparedness projects, characterized in that, It includes a first heat exchange module (1) that exchanges heat with the chilled water of the central air conditioner. The first heat exchange module (1) includes a chilled water heat exchange module (11) that exchanges heat with the chilled water of the central air conditioner and a cold source output module (12) that exchanges heat with the chilled water heat exchange module (11). The cold source output module (12) includes a cold source tank (121). Dry ice (122) and a cold source heat exchange module (123) that exchanges heat with the CO2 formed by the gasification of the dry ice (122) are provided in the cold source tank (121). The cold source heat exchange module (123) includes a cold source pipe (1231) provided on the cold source tank (121) and a first coolant provided in the cold source pipe (1231). A second heat exchange module (2) that exchanges heat with the chilled water or cooling water of the central air conditioner is connected to the first heat exchange module (1). An environmental heat exchange module (3) that is respectively connected to the first heat exchange module (1) and the second heat exchange module (2) and is used to reduce the temperature of the exhaust gas in the underground combat engineering is also included. The second heat exchange module (2) includes an auxiliary heat exchange module (21) that exchanges heat with the cooling water or chilled water of the central air conditioner and a cold storage module (22) that exchanges heat with the auxiliary heat exchange module (21). The cold storage module (22) includes a cold storage tank (221) that communicates with the cold source tank (121). A cold storage heat exchange module (222) that exchanges heat with the CO2 input therein is provided in the cold storage tank (221). The cold storage heat exchange module (222) includes a heat insulation module (2221) provided in the cold storage tank (221) and a cold storage pipe (2222). A second coolant is provided in the cold storage pipe (2222). The heat insulation module (2221) includes a liquid heat insulation part (22211) and a solid heat insulation part (22212) provided in the cold storage tank (221). The environmental heat exchange module (3) includes a second gas transmission pipe (140) that respectively communicates with the cold source tank (121) and the cold storage tank (221) and extends toward the waste discharge port of the underground combat engineering. Both the first coolant and the second coolant are ethylene glycol aqueous solutions with a mass concentration of 60%. The chilled water heat exchange module (11) includes a first plate heat exchanger (111). A first heat exchange pipe (112) that communicates with the cold source pipe (1231) and a second heat exchange pipe (113) that communicates with the chilled water pipe of the central air conditioner are provided on the first plate heat exchanger (111). The first heat exchange pipe (112) and the cold source pipe (1231) form a first circulation pipeline for the circulation of the first coolant, and the second heat exchange pipe (113) and the chilled water pipe of the central air conditioner form a second circulation pipeline for the circulation of the chilled water. The auxiliary heat exchange module (21) includes a second plate heat exchanger (211). A third heat exchange pipe (212) communicating with the cold storage pipe (2222) and a fourth heat exchange pipe (213) communicating with the cooling water pipe or the chilled water pipe of the central air conditioner are provided on the second plate heat exchanger (211). The third heat exchange pipe (212) and the cold storage pipe (2222) form a third circulation pipeline for the second coolant to circulate, and the fourth heat exchange pipe (213) and the cooling water pipe or the chilled water pipe of the central air conditioner form a fourth circulation pipeline for the cooling water or the chilled water to circulate; A first dosing device is provided at one end of the first heat exchange pipe (112) for inputting the first coolant; A second dosing device is provided at one end of the third heat exchange pipe (212) for inputting the second coolant.

2. The standby cold source system for underground war preparedness projects according to claim 1, characterized in that, A first circulation pump (4), a first temperature detector (5), a first filter (6) and a first flow valve (7) are provided at one end of the first heat exchange pipe (112) for outputting the first coolant. A second temperature detector (8), a first expansion tank (9) and a second flow valve (10) are provided at one end of the first heat exchange pipe (112) for inputting the first coolant.

3. The standby cold source system for underground war preparedness projects according to claim 1, characterized in that, A second circulation pump (20), a third temperature detector (30), a second filter (40) and a third flow valve (50) are provided at one end of the third heat exchange pipe (212) for outputting the second coolant. A fourth temperature detector (60), a second expansion tank (70) and a fourth flow valve (80) are provided at one end of the third heat exchange pipe (212) for inputting the second coolant.

4. The standby cold source system for underground war preparedness projects according to claim 1, wherein A fifth temperature detector (90) and a first pressure detector (100) are provided on the cold source tank (121). A sixth temperature detector (110), a second pressure detector (120) and a liquid level gauge (160) are provided on the cold storage tank (221). A first gas transmission pipe (130) is communicated between the cold source tank (121) and the cold storage tank (221). One end of the first gas transmission pipe (130) extends and inserts into the liquid heat preservation part (22211), and a safety gas valve is provided on the first gas transmission pipe (130).

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