Energy supply system and control method thereof

Abstract

The present invention provides an energy supply system and a control method thereof, wherein the energy supply system comprises a medium flow path having a heat transfer medium capable of flowing therein; a heat source, which heats the heat transfer medium in the medium flow path, wherein the medium flow path downstream of the heat source comprises a first branch and a second branch; an external heating engine, which is arranged in the first branch, wherein the heat transfer medium in the first branch heated by the heat source supplies heat to the external heating engine; a heat / cold load, which is arranged in the second branch, wherein the heat transfer medium in the second branch heated by the heat source supplies heat to the heat / cold load; the heat transfer medium heated by the heat source flows in the medium flow path, wherein the heat transfer medium supplies heat to the external heating engine of the first branch and the heat / cold load of the second branch respectively, the external heating engine absorbs heat to realize heat-to-work conversion, the external heating engine operates stably, and the heat / cold load absorbs heat to generate a heat load or a cold load, thereby alleviating the problem of energy waste and realizing the demand for multi-generation.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-energy supply, and in particular to an energy supply system and a control method thereof. Background Art

[0002] External heating engines use external heating and have the outstanding advantage of good energy adaptability. Take the Stirling engine as an example. It is a piston engine with external heating (or combustion). It uses the periodic expansion and compression of the working gas sealed in the circuit to realize the conversion of thermal energy into mechanical work.

[0003] The external heating engine is connected to the generator, and the operation of the engine drives the generator to generate electricity externally.

[0004] In traditional solar energy concentrating external heating engine thermal power generation systems and combined heat and power systems, the high-temperature focused light spot is often used to directly heat the external heating engine heater, which makes it difficult to achieve uniform heating of the heating tube wall temperature, limiting the continuous, stable and efficient operation of the external heating engine.

[0005] The use of heat transfer oil as a heat medium for heating is limited to the operation of externally heated engines with medium and low temperature differences. The use of heat transfer salt as a heat medium will cause the molten salt to solidify and clog the pipeline during shutdown for maintenance.

[0006] It is difficult for an external heat engine to utilize all the heat energy from a heat source, resulting in a waste of energy. Summary of the invention

[0007] In view of the above problems, the present invention provides an energy supply system and a control method thereof, which uses a heat transfer medium as a heat medium to heat an external heating engine. The heat transfer medium can be effectively utilized to flow in the circuit to transfer heat, thereby alleviating the problem of uneven pipe wall caused by directly heating the external heating engine heater, and facilitating the uniform and stable operation of the external heating engine. In addition to the external heating engine, a hot load and a cold load are arranged in the circuit. By opening and closing the medium flow path and changing the path of the heat transfer medium circulation, efficient cascade utilization of energy can be achieved, which can effectively solve the problems in the background technology.

[0008] The energy supply system provided by the present invention comprises:

[0009] a medium flow path having a heat transfer medium capable of flowing therein;

[0010] A heat source heats the heat transfer medium in the medium flow path, wherein the medium flow path downstream of the heat source has a first branch and a second branch;

[0011] An external heating engine is arranged in the first branch, and the heat transfer medium in the first branch heated by the heat source supplies heat to the external heating engine; and

[0012] The hot / cold load is arranged in the second branch, and the heat transfer medium in the second branch heated by the heat source supplies heat to the hot / cold load.

[0013] By adopting the above technical scheme, the heat transfer medium heated by the heat source flows in the medium flow path, and the heat transfer medium supplies heat to the external heating engine of the first branch and the hot / cold load of the second branch respectively. The external heating engine absorbs heat to realize heat-to-work conversion, the external heating engine operates stably, and the hot / cold load absorbs heat to generate heat load or cold load, thereby alleviating the problem of energy waste and realizing the multi-generation demand.

[0014] A technical solution of the present invention is further configured to include:

[0015] A generator is connected to the external heat engine.

[0016] By adopting the above technical solution, the external heating engine heated by the heat transfer medium is heated, and the external heating engine is provided with a high-temperature heat source, which drives the external heating engine to operate, drives the generator to generate electricity, and generates electrical load.

[0017] A technical solution of the present invention is further configured to include:

[0018] The medium heater is connected to the heat source.

[0019] By adopting the above technical solution, different heat sources can complement each other in the medium heater to provide a stable place for heating the heat transfer medium.

[0020] A technical solution of the present invention is further configured to include:

[0021] A medium circulation pump is provided in the medium flow path upstream of the heat source, and the heat transfer medium in the medium flow path returns to the medium circulation pump after passing through the external heating engine or the hot / cold load.

[0022] By adopting the above technical solution, the heat transfer medium is heated in the medium heater, flows to each load through the medium flow path carrying heat, and after heating the load, returns to the medium circulation pump through the medium flow path. After the medium pressure entering the medium circulation pump increases, the heat transfer medium enters the medium heater again to be heated, forming a heat transfer loop.

[0023] A technical solution of the present invention is further configured to include:

[0024] The third branch is located in the medium flow path downstream of the heat source;

[0025] The bypass valve is arranged in the third branch, and the heat transfer medium in the third branch heated by the heat source returns to the medium heater through the medium circulation pump.

[0026] By adopting the above technical solution, after the heat transfer medium flows out from the first branch, if the medium flow is excessive, it can return to the medium circulation pump through the third branch through the bypass valve, and then return to the medium heater to be heated in the medium heater.

[0027] A technical solution of the present invention is further configured to include:

[0028] The working fluid purification device is arranged upstream of the heat source, and the outlet of the working fluid purification device is connected to the medium circulation pump. The working fluid purification device can directly replenish the heat transfer medium to the medium circulation pump.

[0029] By adopting the above technical solution, impurities in the heat transfer medium are removed by the working fluid purification device and then enter the medium flow path to circulate in the system, thereby alleviating the problem of the system being corroded or slagging by impurities in the heat transfer medium.

[0030] A technical solution of the present invention is further configured to include:

[0031] The steam trap is installed at the inlet of the medium circulation pump, connected to the medium circulation pump and the working fluid purification device, and can discharge the condensed water in the medium flow path into the working fluid purification device.

[0032] By adopting the above technical solution, when the heat transfer medium is water vapor, due to the long pipeline it passes through, more condensed water may be generated when the water vapor after passing through the load returns to the medium circulation pump. Therefore, the water vapor must pass through the steam trap before entering the medium circulation pump again. The condensed water generated in the water vapor enters the working fluid purification device, reducing the damage to the medium circulation pump caused by the condensed water carried by the water vapor, thereby affecting the flow of water vapor and the stability of the circulation system.

[0033] The present invention also discloses a control method for an energy supply system, comprising the steps of:

[0034] Heating step: heating the heat transfer medium;

[0035] Heating step: using the heat transfer medium in the heating step to supply heat to an external heat engine and / or a heat / cold load; and

[0036] Cogeneration step: regulating the medium flow rate of the heat transfer medium that supplies heat to the external heating engine and / or the hot / cold load in the heating step.

[0037] By adopting the above technical solution, full utilization and reasonable allocation of energy can be achieved by adjusting the medium flow of the heat transfer medium that supplies heat to the external heating engine and / or the hot / cold load. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of the energy supply system provided in the first embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure of the energy supply system provided in Embodiments 2 to 5 of the present invention;

[0040] Figure 3 A simplified structural diagram of the energy supply system provided in Embodiment 1 and Embodiment 2 of the present invention;

[0041] Figure 4 for Figure 2 Structural schematic diagram of the medium working fluid purification device;

[0042] Figure 5 A simplified structural diagram of the energy supply system provided in Embodiment 3 of the present invention;

[0043] Figure 6 A simplified structural diagram of the energy supply system provided in Embodiment 4 of the present invention;

[0044] Figure 7 This is a simplified structural diagram of the energy supply system provided in Embodiment 5 of the present invention.

[0045] Figure numerals: 1-energy cogeneration system main unit; 2-working medium purification device; 2a-water source; 2b-desalting device; 2c-deoxygenation device; 2d-water storage tank; 2e-feedwater pump; 2f-feedwater valve; 2g-steam generator; 3-medium circulation pump; 4-control unit; 5-adjustable load; 6-heat load; 7-cold load; 8-cold load generator; 9-cold load medium inlet valve 1; 10-heat load medium inlet valve 1; 11-bypass valve ; 12-external heating engine; 13-medium heating chamber; 14-external heating engine heater; 15-generator; 16-external heating engine medium inlet valve; 17-cold load medium inlet valve 2; 18-hot load medium inlet valve 2; 19-medium main valve; 20-heat source; 21-medium flow path; 211-first branch; 212-second branch; 213-third branch; 22-medium heater; 23-drain valve; 24-heat transfer medium. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Embodiment 1

[0048] Combination Figure 1 and Figure 3 , one embodiment of the present invention is as follows:

[0049] An energy supply system includes an energy cogeneration system main unit 1, a control unit 4, an adjustable load 5, and a heat source 20;

[0050] The energy cogeneration system main unit 1 includes:

[0051] A medium flow path 21 having a heat transfer medium 24 capable of flowing therein;

[0052] The heat source 20 heats the heat transfer medium 24 in the medium flow path 21. The medium flow path 21 downstream of the heat source 20 has a first branch 211 and a second branch 212.

[0053] The external heat engine 12 is arranged in the first branch 211, and the heat transfer medium 24 in the first branch 211 heated by the heat source 20 supplies heat to the external heat engine 12;

[0054] The hot / cold load is arranged in the second branch 212, and the heat transfer medium 24 in the second branch 212 heated by the heat source 20 supplies heat to the hot / cold load;

[0055] The generator 15 is connected to the external heat engine 12, and the external heat engine 12 heated by the heat transfer medium 24 drives the generator 15 to generate electricity;

[0056] A medium heater 22 connected to a heat source 20;

[0057] A medium circulation pump 3 is provided in a medium flow path 21 located upstream of the heat source 20. The heat transfer medium 24 in the medium flow path 21 returns to the medium circulation pump 3 after passing through the external heat engine 12 or the heat / cold load;

[0058] The third branch 213 is located in the medium flow path 21 downstream of the heat source 20;

[0059] The bypass valve 11 is arranged in the third branch 213 , and the heat transfer medium 24 in the third branch 213 heated by the heat source 20 returns to the medium heater 22 through the medium circulation pump 3 .

[0060] Wherein, the heat source 20 includes a main heat source and an auxiliary heat source;

[0061] The heat load 6 is set as a heat dissipation heater, and the cold load 7 is set as an absorption refrigerator.

[0062] The adjustable load 5 may be any of a cooling load, a heating load and an electrical load.

[0063] The energy cogeneration system main unit 1 also includes:

[0064] A medium heating chamber 13, an external heating engine heater 14, a medium main valve 19, an external heating engine medium inlet valve 16, a cold load medium inlet valve 19, a cold load medium inlet valve 2 17, a hot load medium inlet valve 10, a hot load medium inlet valve 2 18 and a cold load generator 8;

[0065] The medium circulation pump 3 , the medium heater 22 , the medium main valve 19 , the external heating engine medium inlet valve 16 , and the medium heating chamber 13 are sequentially connected via a medium flow path 21 , and an external heating engine heater 14 is arranged in the medium heating chamber 13 .

[0066] The other side of the medium heating chamber 13 is connected to three pipelines, wherein the first pipeline is connected to the cold load medium inlet valve 19 and the cold load generator 8 in sequence, the second pipeline is connected to the hot load medium inlet valve 10 and the hot load 6 in sequence, and the third pipeline is connected to the bypass valve 11;

[0067] The medium main valve 19 is also connected to the heat load medium inlet valve 2 18 and the heat load 6 in sequence through pipelines;

[0068] The medium main valve 19 is also connected to the cold load medium inlet valve 2 17 and the cold load generator 8 in sequence through pipelines.

[0069] In the first embodiment, the heat transfer medium 24 is air and is stored in a high-pressure gas cylinder.

[0070] The main heat source is solar energy, which can be concentrated in tower, dish, trough and Fresnel types;

[0071] Auxiliary heat sources include energy storage and natural gas.

[0072] The external heating engine heater 14 is of tube bundle type, the external heating engine 12 is of α-type Stirling engine, and the working medium of the external heating engine 12 can be one or more gases such as helium, nitrogen, air, and carbon dioxide.

[0073] The cold load 7 adopts a single-stage single-effect absorption refrigerator, and the working fluid pair of the cold load 7 can be lithium bromide-water solution or ammonia-water solution.

[0074] The heat transfer medium 24 is a supplementary medium for the main unit 1 of the energy supply system. The heat transfer medium 24 passes through the medium circulation pump 3 and the medium heater 22 in succession. The heat transfer medium 24 then passes through the medium main valve 19 and the external heating engine medium inlet valve 16 in turn to enter the medium heating chamber 13. In the medium heating chamber 13, the heat transfer medium 24 heats the external heating engine heater 14, provides a high-temperature heat source for the external heating engine 12, drives the external heating engine 12 to operate, and drives the generator 15 to generate electricity.

[0075] The temperature of the heat transfer medium 24 decreases after passing through the medium heating chamber 13 . After the heat transfer medium 24 comes out of the medium heating chamber 13 , it is transmitted in three paths through the medium flow path 21 .

[0076] The first heat transfer medium 24 enters the cold load generator 8 through the cold load medium inlet valve 9, heats the evaporant of the cold load generator 8, and generates evaporant vapor. The evaporant vapor passes through other components of the cold load 7 to generate cold energy. After passing through the cold load generator 8, the temperature of the heat transfer medium 24 is further reduced to become a low-temperature medium. The low-temperature medium enters the medium circulation pump 3 through the medium flow path 21.

[0077] The second heat transfer medium 24 enters the heat load 6 through the heat load medium inlet valve 10 to provide heat for indoor heating. After passing through the heat load 6, the temperature of the medium is further reduced to become a low-temperature medium. The low-temperature medium enters the medium circulation pump 3 through the medium flow path 21.

[0078] The third heat transfer medium 24 has the following three routes:

[0079] If the medium flow rate at the outlet of the medium heating chamber 13 is greater than the medium flow rate required for heating the heat load 6 and / or the cold load, at least part of the heat transfer medium 24 enters the medium circulation pump 3 through the bypass valve 11;

[0080] If the medium flow rate at the outlet of the medium heating chamber 13 is insufficient to heat the heat load 6, a portion of the heat transfer medium 24 coming out of the medium main valve 19 enters the heat load 6 through the heat load medium inlet valve 2 18 for supplementary heating;

[0081] If the medium flow at the outlet of the medium heating chamber 13 is insufficient to heat the evaporant in the cold load generator 8, the heat transfer medium 24 from the medium main valve 19 enters the cold load generator 8 through the cold load medium inlet valve 2 17 for supplementary heating.

[0082] After the medium pressure of the medium circulation pump 3 increases, the heat transfer medium 24 enters the medium heater 22 to be heated again, and the cycle continues.

[0083] This embodiment also provides a control method for an energy supply system, comprising the steps of:

[0084] Heating step: heating the heat transfer medium 24;

[0085] Heating step: using the heat transfer medium 24 in the heating step to heat the external heat engine 12 and / or the hot / cold load; and

[0086] Cogeneration step: regulating the medium flow rate of the heat transfer medium 24 that supplies heat to the external heat engine 12 and / or the hot / cold loads in the heating step.

[0087] By adopting the above technical solution, full utilization and reasonable distribution of energy can be achieved by adjusting the medium flow of the heat transfer medium 24 that supplies heat to the external heat engine 12 and / or the hot / cold load.

[0088] The control unit 4 can adjust the heat supply of the main heat source and the auxiliary heat source according to the adjustable load 5, and can also adjust the energy cogeneration system main unit 1 to adapt to different adjustable loads 5; the medium circulation pump 3 can adjust the medium flow and medium pressure of the supplementary energy cogeneration system main unit 1.

[0089] By adjusting the medium circulation pump 3, the medium main valve 19, the external heating engine medium inlet valve 16, the hot load medium inlet valve 10, the hot load medium inlet valve 2 18, the cold load medium inlet valve 19, the cold load medium inlet valve 2 17 and the bypass valve 11, the coordinated matching of cold, hot and electric power supply and cold, hot and electric loads is achieved.

[0090] Embodiment 2

[0091] Combination Figure 2 , Figure 3 and Figure 4 , other embodiments of the present invention are as follows:

[0092] The main difference between the second embodiment and the first embodiment is that the heat transfer medium 24 used in the present technical solution is water vapor.

[0093] Another difference between the second embodiment and the first embodiment is that a steam trap 23 and a working medium purification device 2 are additionally provided in the main unit 1 of the energy cogeneration system.

[0094] The working medium purification device 2 includes a water source 2a, a desalination device 2b, a deoxygenation device 2c, a water storage tank 2d, a water supply pump 2e, a water supply valve 2f, and a steam generator 2g.

[0095] The make-up water from the water source 2a first passes through the desalination device 2b to remove salt impurities in the water; then passes through the deoxygenation device 2c to remove oxygen and other gases in the water to avoid slagging and corrosion of the circulation system; then passes through the water supply pump 2e and the water supply valve 2f in turn, and enters the steam generator 2g to generate water vapor as the heat transfer medium 24, providing heat transfer medium for the main unit 1 of the energy cogeneration system.

[0096] The water vapor passes through the steam trap 23 before entering the medium circulation pump 3. The condensed water generated in the water vapor enters the water storage tank 2d through the steam trap 23. After passing through the water storage tank 2d, the water supply pump 2e, the water supply valve 2f, and the steam generator 2g, the water vapor enters the medium circulation pump 3.

[0097] On the basis of the first embodiment, the main heat source adopts dish-type concentrated solar energy, and the auxiliary heat source adopts energy storage and natural gas.

[0098] The external heat engine heater 14 adopts a fin type, which can effectively increase the heat exchange area.

[0099] The external heat engine 12 adopts a four-cylinder double-acting Stirling engine, which can effectively improve the compactness of the machine and reduce the footprint of the system.

[0100] The working medium of the external heat engine 12 is helium.

[0101] The cold load 7 adopts a single-stage single-effect absorption refrigerator, and the working fluid pair of the cold load 7 adopts lithium bromide-water solution.

[0102] The control unit 4 realizes the coordinated matching of cold, heat and electricity combined supply and cold, heat and electricity loads by adjusting the medium circulation pump 3, the medium main valve 19, the external heating engine medium inlet valve 16, the hot load medium inlet valve 10, the hot load medium inlet valve 2 18, the cold load medium inlet valve 19, the cold load medium inlet valve 2 17 and the bypass valve 11.

[0103] Embodiment 3

[0104] Combination Figure 2 , Figure 4 and Figure 5 Other embodiments of the present invention are as follows: Based on the second embodiment, the main heat source is solar energy, the sunlight is concentrated by the secondary dish-type concentrator heating unit to heat the medium heater 22, and the auxiliary heat source is natural gas.

[0105] In summer or when the temperature is high, the control unit 4 closes the hot load medium inlet valve 10 and the hot load medium inlet valve 2 18 by adjusting the medium circulation pump 3, the medium main valve 19, the external heating engine medium inlet valve 16, the cold load medium inlet valve 19, the cold load medium inlet valve 2 17 and the bypass valve 11. The heat transfer medium 24 heats the external heating engine heater 14 to generate electrical energy while heating the cold load generator 8 to generate cold energy, thereby realizing the coordinated matching of cold and electric loads.

[0106] Embodiment 4

[0107] Combination Figure 2 , Figure 4 and Figure 6 Other embodiments of the present invention are as follows: Based on the second embodiment, the main heat source is solar energy, the sunlight is concentrated by the secondary dish-type concentrator heating unit to heat the medium heater 22, and the auxiliary heat source is natural gas.

[0108] In winter or when the temperature is low, the control unit 4 can adjust the medium circulation pump 3, the medium main valve 19, the external heating engine medium inlet valve 16, the hot load medium inlet valve 10, the hot load medium inlet valve 2 18 and the bypass valve 11, close the cold load medium inlet valve 19 and the cold load medium inlet valve 2 17, and the heat transfer medium 24 heats the external heating engine heater 14 to generate electricity while heating the heat load 6 for heating, thereby realizing the coordinated matching of heat and electricity and heat and electricity loads.

[0109] Embodiment 5

[0110] Combination Figure 2 , Figure 4 and Figure 7 Other embodiments of the present invention are as follows: Based on the second embodiment, the main heat source is solar energy, the sunlight is concentrated by the secondary dish-type concentrator heating unit to heat the medium heater 22, and the auxiliary heat source is natural gas.

[0111] When hot and cold loads are not needed, the control unit 4 closes the hot load medium inlet valve 10, the hot load medium inlet valve 2 18, the cold load medium inlet valve 19 and the cold load medium inlet valve 2 17 by adjusting the medium circulation pump 3, the medium main valve 19, the external heating engine medium inlet valve 16 and the bypass valve 11, and the heat transfer medium 24 only heats the external heating engine heater 14 to generate electricity.

[0112] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy supply system, characterized in that: include: A medium flow path (21) having a heat transfer medium (24) capable of flowing therein in a gaseous state; A heat source (20) for heating the heat transfer medium (24) in the medium flow path (21), wherein the medium flow path (21) located downstream of the heat source (20) comprises a first branch (211) and a second branch (212); A medium heating chamber (13) is arranged in communication with the first branch (211), and the second branch (212) is located downstream of the medium heating chamber (13); An externally heated engine (12) has an externally mounted engine heater (14), wherein the externally mounted engine heater (14) is arranged in the medium heating chamber (13), and the heat transfer medium (24) in the first branch (211) heated by the heat source (20) directly enters the medium heating chamber (13) to heat the externally mounted engine heater (14), thereby supplying heat to the externally heated engine (12); and A hot / cold load is arranged in the second branch (212), and the heat transfer medium (24) in the second branch (212) heated by the heat source (20) supplies heat to the hot / cold load; A medium circulation pump (3), wherein the medium flow path (21) located upstream of the heat source (20) has the medium circulation pump (3), and the heat transfer medium (24) in the medium flow path (21) returns to the medium circulation pump (3) after passing through the medium heating chamber (13) or the heat / cold load; a third branch (213) located in the medium flow path (21) downstream of the medium heating chamber (13) and connected in parallel with the second branch (212) and in series with the first branch (211); a bypass valve (11) disposed in the third branch (213), wherein the heat transfer medium (24) in the third branch (213) heated by the heat source (20) returns to the medium heater (22) via the medium circulation pump (3); The medium circulation pump (3), the medium main valve (19), the external heating engine medium inlet valve (16) and the medium heating chamber (13) are sequentially connected via a medium flow path (21); A hot / cold load medium inlet valve 1 (10 / 9), provided in the second branch and located at the inlet of the hot / cold load; A second hot / cold load medium inlet valve (18 / 17), wherein the medium main valve (19) is connected to the second hot / cold load medium inlet valve (18 / 17) and the inlet of the hot / cold load via a pipeline; The control unit (4) realizes the coordinated matching of heat / cold and electricity combined supply and cold / heat and electricity load by adjusting the medium circulation pump (3), the medium main valve (19), the external heating engine medium inlet valve (16), the hot / cold load medium inlet valve 1 (10 / 9), the hot / cold load medium inlet valve 2 (18 / 17) and the bypass valve (11).

2. The energy supply system according to claim 1, characterized in that: Also includes: The generator (15) is connected to the external heating engine (12), and the external heating engine (12) heated by the heat transfer medium (24) drives the generator (15) to generate electricity.

3. The energy supply system according to claim 1, characterized in that: Also includes: A medium heater (22) is connected to the heat source (20).

4. The energy supply system according to claim 2, characterized in that: Also includes: The working fluid purification device (2) is arranged upstream of the heat source (20), and the outlet of the working fluid purification device (2) is connected to the medium circulation pump (3). The working fluid purification device (2) can directly replenish the heat transfer medium (24) to the medium circulation pump (3).

5. The energy supply system according to claim 4, characterized in that: Also includes: The steam trap (23) is arranged at the inlet of the medium circulation pump (3), connected to the medium circulation pump (3) and the working medium purification device (2), and can discharge the condensed water in the medium flow path (21) into the working medium purification device (2).

6. A control method for an energy supply system according to any one of claims 1 to 5, characterized in that: Includes steps: Heating step: heating a heat transfer medium (24); A heating step: using the heat transfer medium (24) in the heating step to supply heat to an external heat engine (12) and / or a heat / cold load; as well as Cogeneration step: regulating the medium flow rate of the heat transfer medium (24) that supplies heat to the external heating engine (12) and / or the hot / cold load in the heating step.

Images