Regenerative heat cycle with intermediate regenerative mechanical compression heat pump

Abstract

The application provides a regenerative heat cycle and an intermediate regenerative mechanical compression heat pump, and belongs to the technical field of thermodynamics and heat pump. The regenerative heat cycle is a closed process composed of eight processes of a certain mass of circulating working medium in sequence, namely, a low-temperature heat source heat absorption process 12, a pressure increasing process 23, a circulating working medium heat absorption process 34, a pressure increasing process 45, a high-temperature heat source heat release process 56, a pressure decreasing process 67, a circulating working medium heat release process 78 and a pressure decreasing process 81. The heat release of the process 78 satisfies the heat absorption of the process 34. Based on the regenerative heat cycle, the corresponding intermediate regenerative mechanical compression heat pump is constructed.

Description

Technical fields:

[0001] This invention belongs to the field of thermodynamics and thermal motion technology. Background technology:

[0002] Cooling, heating, and power demands are common in human life and production. Mechanical compression heat pumps, using gas as the working fluid and based on the Brayton reverse cycle, are an important means of achieving both cooling and efficient heating; regenerative technology is often employed to achieve deep cooling or reduce the cycle compression ratio. However, in traditional regenerative mechanical compression heat pumps, the regenerative process is relatively fixed, making it impossible to use regenerative technology in many situations.

[0003] This invention provides a regenerative thermodynamic cycle with flexible regeneration methods and high degree of freedom in selecting regeneration pressure and temperature; based on the new regenerative thermodynamic cycle, this invention presents a variety of specific intermediate regeneration mechanical compression heat pumps. Summary of the Invention:

[0004] The main objective of this invention is to provide a regenerative thermodynamic cycle and an intermediate regenerative mechanical compression heat pump. The specific contents of the invention are described in detail below:

[0005] 1. A regenerative thermodynamic cycle refers to a closed-loop process consisting of eight sequential processes of a certain mass of circulating working fluid: heat absorption from a low-temperature heat source (process 12), pressure increase (process 23), heat absorption from the circulating working fluid (process 34), pressure increase (process 45), heat release to a high-temperature heat source (process 56), pressure decrease (process 67), heat release to the circulating working fluid (process 78), and pressure decrease (process 81); wherein the heat release in process 78 satisfies the heat absorption in process 34.

[0006] 2. A regenerative thermodynamic cycle refers to a closed process consisting of eight sequential processes of a certain mass of circulating working fluid: heat release to a high-temperature heat source (process 81), pressure reduction (process 12), heat release to the circulating working fluid (process 23), pressure reduction (process 34), heat absorption from a low-temperature heat source (process 45), pressure increase (process 56), heat absorption from the circulating working fluid (process 67), and pressure increase (process 78). The non-closed process 12345678 is formed after canceling the heat release to the high-temperature heat source process 81. Among them, the heat release of process 23 satisfies the heat absorption of process 67.

[0007] 3. A regenerative thermodynamic cycle refers to a closed process consisting of eight sequential processes of a certain mass of circulating working fluid: heat absorption from a low-temperature heat source (process 81), pressure increase (process 12), heat absorption from the circulating working fluid (process 23), pressure increase (process 34), heat release to a high-temperature heat source (process 45), pressure decrease (process 56), heat release to the circulating working fluid (process 67), and pressure decrease (process 78). The non-closed process 12345678 formed after canceling the heat absorption from the low-temperature heat source (process 81) is also included. Among these processes, the heat release of process 67 satisfies the heat absorption of process 23.

[0008] 4. Intermediate regenerative mechanical compression heat pump mainly consists of a compressor, an expander, a low-temperature heat exchanger, a heater, and a regenerator. The compressor has a circulating working fluid channel that connects to the expander via the heater. The expander also has a circulating working fluid channel that connects to itself via the regenerator. The expander also has a circulating working fluid channel that connects to the compressor via the low-temperature heat exchanger. The compressor also has a circulating working fluid channel that connects to itself via the regenerator. The heater also has a channel for the heated medium that connects to the outside. The low-temperature heat exchanger also has a channel for the low-temperature heat medium that connects to the outside. The expander connects to the compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0009] 5. Intermediate regenerative mechanical compression heat pump, mainly composed of a compressor, an expander, a low-temperature heat exchanger, and a regenerator; it has an external channel for the heated medium connected to the expander, the expander also has a channel for the heated medium connected to itself via the regenerator, the expander also has a channel for the heated medium connected to the compressor via the low-temperature heat exchanger, the compressor also has a channel for the heated medium connected to itself via the regenerator, and the compressor also has a channel for the heated medium connected to the outside; the low-temperature heat exchanger also has a channel for the low-temperature heat medium connected to the outside; the expander is connected to the compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0010] 6. Intermediate regenerative mechanical compression heat pump, mainly composed of a compressor, an expander, a heater, and a regenerator; it has an external low-temperature heat medium channel connected to the compressor, and the compressor also has a low-temperature heat medium channel connected to itself via the regenerator, and the expander is also connected to the external environment via the heater; the heater also has a channel for the heated medium connected to the external environment, and the expander is connected to the compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0011] 7. An intermediate regenerative mechanical compression heat pump mainly consists of a dual-energy compressor, an expander / accelerator, a low-temperature heat exchanger, a heater, and a regenerator. The dual-energy compressor has a circulating working fluid channel that connects to the expander / accelerator via the heater. The expander / accelerator also has a circulating working fluid channel that connects to itself via the regenerator. The expander / accelerator also has a circulating working fluid channel that connects to the dual-energy compressor via the low-temperature heat exchanger. The dual-energy compressor also has a circulating working fluid channel that connects to itself via the regenerator. The heater also has a channel for the heated medium that connects to the outside. The low-temperature heat exchanger also has a channel for the low-temperature heat medium that connects to the outside. The expander / accelerator connects to the dual-energy compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0012] 8. An intermediate regenerative mechanical compression heat pump mainly consists of a dual-energy compressor, an expander, a low-temperature heat exchanger, and a regenerator. Externally, there is a channel for the heated medium connected to the expander. The expander also has a channel for the heated medium connected to itself via the regenerator. The expander further has a channel for the heated medium connected to the dual-energy compressor via the low-temperature heat exchanger. The dual-energy compressor also has a channel for the heated medium connected to itself via the regenerator, and a channel for the heated medium connected to the external environment. The low-temperature heat exchanger also has a channel for a low-temperature heat medium connected to the external environment. The expander connects to the dual-energy compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0013] 9. An intermediate regenerative mechanical compression heat pump mainly consists of a dual-energy compressor, an expander, a heater, and a regenerator. It has an external low-temperature heat medium channel connected to the dual-energy compressor. The dual-energy compressor also has a low-temperature heat medium channel connected to itself via the regenerator. The dual-energy compressor also has a low-temperature heat medium channel connected to the expander via the heater. The expander also has a low-temperature heat medium channel connected to itself via the regenerator. The expander also has a low-temperature heat medium channel connected to the external environment. The heater also has a channel for the heated medium connected to the external environment. The expander connects to the dual-energy compressor and transmits power, forming an intermediate regenerative mechanical compression heat pump.

[0014] 10. Intermediate regenerative mechanical compression heat pump, mainly composed of a dual-energy compressor, a nozzle, a low-temperature heat exchanger, a heater, and a regenerator; the dual-energy compressor has a circulating working fluid channel that connects to the nozzle via the heater, the nozzle also has a circulating working fluid channel that connects to itself via the regenerator, the nozzle also has a circulating working fluid channel that connects to the dual-energy compressor via the low-temperature heat exchanger, and the dual-energy compressor also has a circulating working fluid channel that connects to itself via the regenerator; the heater also has a channel for the heated medium that connects to the outside, and the low-temperature heat exchanger also has a channel for the low-temperature heat medium that connects to the outside, forming an intermediate regenerative mechanical compression heat pump.

[0015] 11. An intermediate regenerative mechanical compression heat pump mainly consists of a dual-energy compressor, a nozzle, a low-temperature heat exchanger, and a regenerator. Externally, there is a channel for the heated medium connected to the nozzle. The nozzle also has a channel for the heated medium connected to itself via the regenerator. The nozzle further has a channel for the heated medium connected to the dual-energy compressor via the low-temperature heat exchanger. The dual-energy compressor also has a channel for the heated medium connected to itself via the regenerator, and a channel for the heated medium connected to the external environment. The low-temperature heat exchanger also has a channel for the low-temperature heat medium connected to the external environment, thus forming an intermediate regenerative mechanical compression heat pump.

[0016] 12. An intermediate regenerative mechanical compression heat pump mainly consists of a dual-energy compressor, a nozzle, a heater, and a regenerator. It has an external low-temperature heat medium channel connected to the dual-energy compressor. The dual-energy compressor also has a low-temperature heat medium channel connected to itself via the regenerator. The nozzle also has a low-temperature heat medium channel connected to the heater and the nozzle. The nozzle also has a low-temperature heat medium channel connected to itself via the regenerator. The nozzle also has a low-temperature heat medium channel connected to the external environment. The heater also has a channel for the heated medium connected to the external environment, thus forming an intermediate regenerative mechanical compression heat pump. Attached image description:

[0017] Figure 1 This is a schematic diagram illustrating the principle of a regenerative thermodynamic cycle provided by the present invention.

[0018] Figure 2 This is a principle thermodynamic system diagram of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the second principle of the thermodynamic system of the intermediate regenerative mechanical compression heat pump provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the third principle thermodynamic system of the intermediate regenerative mechanical compression heat pump provided by the present invention.

[0021] Figure 5 This is a schematic diagram of the fourth principle thermodynamic system of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0022] Figure 6 This is a fifth principle thermodynamic system diagram of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0023] Figure 7 This is a schematic diagram of the sixth principle thermodynamic system of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0024] Figure 8 This is a schematic diagram of the seventh principle thermodynamic system of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0025] Figure 9 This is the eighth principle thermodynamic system diagram of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0026] Figure 10 This is the ninth principle thermodynamic system diagram of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0027] Figure 11 This is a principle thermodynamic system diagram of the 10th type of intermediate regenerative mechanical compression heat pump provided by the present invention.

[0028] Figure 12 This is a principle thermodynamic system diagram of an intermediate regenerative mechanical compression heat pump provided by the present invention.

[0029] In the diagram, 1-compressor, 2-expander, 3-low temperature heat exchanger, 4-heater, 5-regenerator, 6-dual-energy compressor, 7-expander speed increaser, 8-nozzle. Detailed implementation method:

[0030] First, it should be noted that the structure and process are not repeated unless necessary; obvious processes are not described. The invention will now be described in detail with reference to the accompanying drawings and examples.

[0031] Figure 1 The example of a regenerative thermodynamic cycle shown in the Ts diagram is performed as follows:

[0032] (1) From the perspective of the cyclic process:

[0033] The circulating working fluid undergoes eight processes: 12 (heat absorption and temperature rise from a low-temperature heat source), 23 (adiabatic pressure and temperature rise), 34 (heat absorption and temperature rise from the circulating working fluid), 45 (adiabatic pressure and temperature rise), 56 (heat release and temperature drop to a high-temperature heat source), 67 (adiabatic pressure reduction and expansion), 78 (heat release to process 34 and subsequent regenerative cooling), and 81 (adiabatic pressure reduction and expansion). The heat release in process 78 satisfies the heat absorption in process 34.

[0034] (2) From the perspective of energy conversion:

[0035] ① Endothermic process—The heat required for the circulating working fluid to carry out process 12 is provided by a low-temperature heat source; the heat required for the circulating working fluid to carry out process 34 is met by process 78, which is heat release—regeneration.

[0036] ② Heat release process - The circulating working fluid releases heat in process 56 and releases it to the high-temperature heat source; the circulating working fluid releases heat in process 78 to meet the heat absorption requirements of process 34.

[0037] ③ Energy conversion process—the pressurization process of the circulating working fluid 23, 45, is generally completed by a compressor or a dual-energy compressor or a diffuser; the depressurization and expansion process of the circulating working fluid 67, 81, is generally completed by an expander or an expander speed-up unit or a nozzle; the mechanical energy released during expansion is less than the mechanical energy consumed during pressurization, and the external mechanical energy is provided to the compressor or a dual-energy compressor to complete the regenerative thermodynamic cycle.

[0038] Figure 2 The example of a regenerative thermodynamic cycle shown in the Ts diagram is performed as follows:

[0039] (1) From the perspective of the cyclic process:

[0040] The circulating working fluid undergoes seven processes: adiabatic decompression expansion process 12, regenerative cooling process 23 (releasing heat to process 67), adiabatic decompression expansion process 34, heat absorption and heating process 45 from the low-temperature heat source, adiabatic pressure and heating process 56, heat absorption and heating process 67 from the circulating working fluid, and adiabatic pressure and heating process 78. Among these, the heat release in process 23 satisfies the heat absorption in process 67.

[0041] (2) From the perspective of energy conversion:

[0042] ① Endothermic process—The heat required for the circulating working fluid to carry out process 45 is provided by a low-temperature heat source; the heat required for the circulating working fluid to carry out process 67 is met by process 23, which is heat release—regeneration.

[0043] ② Heat release process - The circulating working fluid undergoes processes 12345678, and the working fluid temperature rises, resulting in a high-temperature heat load; the circulating working fluid releases heat in process 23 to meet the heat absorption requirements of process 67.

[0044] ③ Energy conversion process—the pressurization process of the circulating working fluid 56, 78 is generally completed by a compressor or a dual-energy compressor or a diffuser; the depressurization and expansion process of the circulating working fluid 12, 34 is generally completed by an expander or an expander speed-up unit or a nozzle; the mechanical energy released during expansion is less than the mechanical energy consumed during pressurization, and the external mechanical energy is provided to the compressor or a dual-energy compressor to complete the regenerative thermodynamic cycle.

[0045] Figure 3 The example of a regenerative thermodynamic cycle shown in the Ts diagram is performed as follows:

[0046] (1) From the perspective of the cyclic process:

[0047] The circulating working fluid undergoes the following processes: adiabatic pressure and temperature increase process 12, self-circulating working fluid heat absorption and temperature increase process 23, adiabatic pressure and temperature increase process 34, heat release and temperature reduction process to high-temperature heat source process 45, adiabatic pressure reduction and expansion process 56, heat recovery and temperature reduction process to process 23 process 67, and adiabatic pressure reduction and expansion process 78 – a total of 7 processes.

[0048] (2) From the perspective of energy conversion:

[0049] ① Heat absorption process—the circulating working fluid undergoes processes 12345678, its temperature decreases, and it releases low-temperature heat load; the heat required for the circulating working fluid to undergo process 23 is met by process 67, which is heat release process—regeneration.

[0050] ② Exothermic process—The circulating working fluid releases heat in process 45 and releases it to the high-temperature heat source; the circulating working fluid releases heat in process 67 to meet the heat absorption requirements of process 23.

[0051] ③ Energy conversion process—the pressurization process of the circulating working fluid 12, 34, is generally completed by a compressor or a dual-energy compressor or a diffuser; the depressurization and expansion process of the circulating working fluid 56, 78, is generally completed by an expander or an expander speed-up unit or a nozzle; the mechanical energy released during expansion is less than the mechanical energy consumed during pressurization, and the external mechanical energy is provided to the compressor or a dual-energy compressor to complete the regenerative thermodynamic cycle.

[0052] Figure 4 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0053] (1) Structurally, it is mainly composed of a compressor, an expander, a low-temperature heat exchanger, a heater and a regenerator; the compressor 1 has a circulating working fluid channel that is connected to the expander 2 through the heater 4, the expander 2 also has a circulating working fluid channel that is connected to itself through the regenerator 5, the expander 2 also has a circulating working fluid channel that is connected to the compressor 1 through the low-temperature heat exchanger 3, the compressor 1 also has a circulating working fluid channel that is connected to itself through the regenerator 5; the heater 4 also has a heated medium channel that is connected to the outside, the low-temperature heat exchanger 3 also has a low-temperature heat medium channel that is connected to the outside, and the expander 2 is connected to the compressor 1 and transmits power.

[0054] (2) In terms of process, the circulating working fluid discharged from the compressor 1 flows through the heater 4 to release heat and cool down, and then enters the expander 2 to reduce pressure and do work; after the circulating working fluid enters the expander 2 to reduce pressure and do work to a certain extent, it flows through the regenerator 5 to release heat, and then enters the expander 2 to continue to reduce pressure and do work; the circulating working fluid discharged from the expander 2 flows through the low-temperature heat exchanger 3 to absorb heat and increase temperature, and then enters the compressor 1 to increase pressure and increase temperature; after the circulating working fluid enters the compressor 1 to increase pressure and increase temperature to a certain extent, it flows through the regenerator 5 to absorb heat, and then enters the compressor 1 to continue to increase pressure and increase temperature; the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 3, the heated medium obtains high-temperature heat load through the heater 4, and the expander 2 and the outside provide power to the compressor 1, forming an intermediate regenerative mechanical compression heat pump.

[0055] Figure 5 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0056] (1) Structurally, it is mainly composed of a compressor, an expander, a low-temperature heat exchanger and a regenerator; there is a heated medium channel connected to the expander 2 externally, the expander 2 also has a heated medium channel connected to itself via the regenerator 5, the expander 2 also has a heated medium channel connected to the compressor 1 via the low-temperature heat exchanger 3, the compressor 1 also has a heated medium channel connected to itself via the regenerator 5, the compressor 1 also has a heated medium channel connected to the outside; the low-temperature heat exchanger 3 also has a low-temperature heat medium channel connected to the outside, and the expander 2 is connected to the compressor 1 and transmits power.

[0057] (2) In terms of process, the external heated medium enters the expander 2, reduces its pressure and does work to a certain extent, then flows through the regenerator 5 and releases heat, and then enters the expander 2 to continue to reduce its pressure and do work; the heated medium discharged from the expander 2 flows through the low-temperature heat exchanger 3 to absorb heat and increase its temperature, and then enters the compressor 1 to increase its pressure and temperature; the heated medium entering the compressor 1 is increased in pressure and temperature to a certain extent, then flows through the regenerator 5 to absorb heat and increase its temperature, and then enters the compressor 1 to continue to increase its pressure and temperature and is discharged to the outside; the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 3, and the heated medium obtains high-temperature heat load through the process, and the expander 2 and the outside provide power to the compressor 1, forming an intermediate regenerative mechanical compression heat pump.

[0058] Figure 6 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0059] (1) Structurally, it is mainly composed of a compressor, an expander, a heater and a regenerator; there is a low-temperature heat medium channel connected to the compressor 1 externally, the compressor 1 also has a low-temperature heat medium channel connected to itself via the regenerator 5, the compressor 1 also has a low-temperature heat medium channel connected to the expander 2 via the heater 4, the expander 2 also has a low-temperature heat medium channel connected to itself via the regenerator 5, the expander 2 also has a low-temperature heat medium channel connected to the outside; the heater 4 also has a heated medium channel connected to the outside, and the expander 2 is connected to the compressor 1 and transmits power.

[0060] (2) In terms of process, the external low-temperature heat medium enters the compressor 1 and is pressurized and heated to a certain extent. After flowing through the regenerator 5 to absorb heat and heat up, it enters the compressor 1 again to continue pressurizing and heating up. The low-temperature heat medium discharged from the compressor 1 flows through the heater 4 to release heat and cool down. Then it enters the expander 2 to reduce pressure and do work. The low-temperature heat medium entering the expander 2 reduces pressure and does work to a certain extent. After flowing through the regenerator 5 and releasing heat, it enters the expander 2 again to continue reducing pressure and doing work and is discharged to the outside. The low-temperature heat medium provides low-temperature heat load through the inlet and outlet process. The heated medium obtains high-temperature heat load through the heater 4. The expander 2 and the outside provide power to the compressor 1, forming an intermediate regenerative mechanical compression heat pump.

[0061] Figure 7 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0062] (1) Structurally, it is mainly composed of a dual-energy compressor, an expander and speed-up unit, a low-temperature heat exchanger, a heater and a regenerator; the dual-energy compressor 6 has a circulating working fluid channel that is connected to the expander and speed-up unit 7 via the heater 4, the expander and speed-up unit 7 also has a circulating working fluid channel that is connected to itself via the regenerator 5, the expander and speed-up unit 7 also has a circulating working fluid channel that is connected to the dual-energy compressor 6 via the low-temperature heat exchanger 3, the dual-energy compressor 6 also has a circulating working fluid channel that is connected to itself via the regenerator 5; the heater 4 also has a heated medium channel that is connected to the outside, the low-temperature heat exchanger 3 also has a low-temperature heat medium channel that is connected to the outside, and the expander and speed-up unit 7 is connected to the dual-energy compressor 6 and transmits power.

[0063] (2) In terms of process, the circulating working fluid discharged from the dual-energy compressor 6 flows through the heater 4 to release heat and cool down, and then enters the expander 7 to reduce pressure and increase speed; the circulating working fluid enters the expander 7 to reduce pressure and increase speed or reduces pressure and increases speed to a certain extent and then flows through the regenerator 5 to release heat, and then enters the expander 7 to continue to reduce pressure and increase speed; the circulating working fluid discharged from the expander 7 flows through the low-temperature heat exchanger 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 6 to increase pressure and increase temperature and decrease speed; the circulating working fluid entering the dual-energy compressor 6 increases pressure and increases temperature and decreases speed to a certain extent and then flows through the regenerator 5 to absorb heat, and then enters the dual-energy compressor 6 to continue to increase pressure and increase temperature or increases pressure and increases temperature and decrease speed; the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 3, the heated medium obtains high-temperature heat load through the heater 4, and the expander 7 and the outside provide power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0064] Figure 8 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0065] (1) Structurally, it is mainly composed of a dual-energy compressor, an expander, a low-temperature heat exchanger, and a regenerator; the external heating medium channel is connected to the expander 7, the expander 7 also has a heating medium channel connected to itself via the regenerator 5, the expander 7 also has a heating medium channel connected to the dual-energy compressor 6 via the low-temperature heat exchanger 3, the dual-energy compressor 6 also has a heating medium channel connected to itself via the regenerator 5, the dual-energy compressor 6 also has a heating medium channel connected to the external environment; the low-temperature heat exchanger 3 also has a low-temperature heat medium channel connected to the external environment, and the expander 7 is connected to the dual-energy compressor 6 and transmits power.

[0066] (2) In terms of process, the external heated medium enters the expansion speed increaser 7 to reduce pressure and do work, or reduces pressure and does work and increases speed to a certain extent, then flows through the regenerator 5 and releases heat, and then enters the expansion speed increaser 7 to continue to reduce pressure and do work and increase speed; the heated medium discharged from the expansion speed increaser 7 flows through the low temperature heat exchanger 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 6 to increase pressure and increase temperature and decrease speed; the heated medium entering the dual-energy compressor 6 is pressurized, heated and decreased speed to a certain extent, then flows through the regenerator 5 to absorb heat and increase temperature, and enters the dual-energy compressor 6 to continue to increase pressure and increase temperature, or increases pressure and increase temperature and decrease speed, and then is discharged to the outside; the low temperature heat medium is provided with low temperature heat load through the low temperature heat exchanger 3, and the heated medium obtains high temperature heat load through the process, the expansion speed increaser 7 and the outside provide power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0067] Figure 9 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0068] (1) Structurally, it is mainly composed of a dual-energy compressor, an expander and speed-up unit, a heater and a regenerator; there is a low-temperature heat medium channel connected to the dual-energy compressor 6 externally, the dual-energy compressor 6 also has a low-temperature heat medium channel connected to itself via the regenerator 5, the dual-energy compressor 6 also has a low-temperature heat medium channel connected to the expander and speed-up unit 7 via the heater 4, the expander and speed-up unit 7 also has a low-temperature heat medium channel connected to itself via the regenerator 5, the expander and speed-up unit 7 also has a low-temperature heat medium channel connected to the outside; the heater 4 also has a heated medium channel connected to the outside, and the expander and speed-up unit 7 is connected to the dual-energy compressor 6 and transmits power.

[0069] (2) In terms of process, the external low-temperature heat medium enters the dual-energy compressor 6, is pressurized and heated, and then flows through the regenerator 5 to absorb heat and heat up. After that, it enters the dual-energy compressor 6 to continue to pressurize and heat up or pressurize and heat up and then slow down. The low-temperature heat medium discharged from the dual-energy compressor 6 flows through the heater 4 to release heat and cool down. After that, it enters the expansion speed increaser 7 to reduce pressure and do work and increase speed. The low-temperature heat medium entering the expansion speed increaser 7 reduces pressure and does work or reduces pressure and does work and increases speed up to a certain extent. After that, it flows through the regenerator 5 and releases heat. It enters the expansion speed increaser 7 to continue to reduce pressure and do work and increase speed up. After that, it is discharged to the outside. The low-temperature heat medium provides low-temperature heat load through the inlet and outlet process. The heated medium obtains high-temperature heat load through the heater 4. The expansion speed increaser 7 and the outside provide power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0070] Figure 10 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0071] (1) Structurally, it is mainly composed of a dual-energy compressor, a nozzle, a low-temperature heat exchanger, a heater and a regenerator; the dual-energy compressor 6 has a circulating working fluid channel that is connected to the nozzle 8 via the heater 4, the nozzle 8 also has a circulating working fluid channel that is connected to itself via the regenerator 5, the nozzle 8 also has a circulating working fluid channel that is connected to the dual-energy compressor 6 via the low-temperature heat exchanger 3, the dual-energy compressor 6 also has a circulating working fluid channel that is connected to itself via the regenerator 5; the heater 4 also has a heated medium channel that is connected to the outside, and the low-temperature heat exchanger 3 also has a low-temperature heat medium channel that is connected to the outside.

[0072] (2) In terms of process, the circulating working fluid discharged from the dual-energy compressor 6 flows through the heater 4 to release heat and cool down, and then enters the nozzle 8 to reduce pressure and increase speed. After the circulating working fluid enters the nozzle 8 to reduce pressure and increase speed to a certain extent, it flows through the regenerator 5 to release heat, and then enters the nozzle 8 to continue to reduce pressure and increase speed. The circulating working fluid discharged from the nozzle 8 flows through the low-temperature heat exchanger 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 6 to increase pressure and increase temperature and decrease speed. After the circulating working fluid enters the dual-energy compressor 6 to increase pressure and increase temperature and decrease speed to a certain extent, it flows through the regenerator 5 to absorb heat, and then enters the dual-energy compressor 6 to continue to increase pressure and increase temperature or increase pressure and increase temperature and decrease speed. The low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 3, and the heated medium obtains high-temperature heat load through the heater 4. The external provides power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0073] Figure 11 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0074] (1) Structurally, it is mainly composed of a dual-energy compressor, a nozzle, a low-temperature heat exchanger and a regenerator; there is a heated medium channel connected to the nozzle 8 externally, the nozzle 8 also has a heated medium channel connected to itself via the regenerator 5, the nozzle 8 also has a heated medium channel connected to the dual-energy compressor 6 via the low-temperature heat exchanger 3, the dual-energy compressor 6 also has a heated medium channel connected to itself via the regenerator 5, the dual-energy compressor 6 also has a heated medium channel connected to the outside; the low-temperature heat exchanger 3 also has a low-temperature heat medium channel connected to the outside.

[0075] (2) In terms of process, the external heated medium enters the nozzle 8, reduces pressure and increases speed to a certain extent, then flows through the regenerator 5 and releases heat, and then enters the nozzle 8 again to continue to reduce pressure and increase speed; the heated medium discharged from the nozzle 8 flows through the low-temperature heat exchanger 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 6 to increase pressure and temperature and decrease speed; the heated medium entering the dual-energy compressor 6 increases pressure and temperature and decreases speed to a certain extent, then flows through the regenerator 5 to absorb heat and increase temperature, and enters the dual-energy compressor 6 to continue to increase pressure and temperature or increase pressure and temperature and decrease speed, and then is discharged to the outside; the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 3, and the heated medium obtains high-temperature heat load through the process, and the outside provides power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0076] Figure 12 The intermediate regenerative mechanical compression heat pump shown is implemented as follows:

[0077] (1) Structurally, it is mainly composed of a dual-energy compressor, a nozzle, a heater and a regenerator; there is a low-temperature heat medium channel connected to the dual-energy compressor 6 externally, and the dual-energy compressor 6 also has a low-temperature heat medium channel connected to itself via the regenerator 5, and the dual-energy compressor 6 also has a low-temperature heat medium channel connected to the nozzle 8 via the heater 4, and the nozzle 8 also has a low-temperature heat medium channel connected to itself via the regenerator 5, and the nozzle 8 also has a low-temperature heat medium channel connected to the outside; the heater 4 also has a heated medium channel connected to the outside.

[0078] (2) In terms of process, the external low-temperature heat medium enters the dual-energy compressor 6, is pressurized and heated, and then flows through the regenerator 5 to absorb heat and heat up. After that, it enters the dual-energy compressor 6 to continue to pressurize and heat up or pressurize and heat up and then slow down. The low-temperature heat medium discharged from the dual-energy compressor 6 flows through the heater 4 to release heat and cool down. After that, it enters the nozzle 8 to reduce pressure and increase speed. After the low-temperature heat medium entering the nozzle 8 is depressurized and increased speed up to a certain extent, it flows through the regenerator 5 to release heat. It enters the nozzle 8 to continue to reduce pressure and increase speed up, and then is discharged to the outside. The low-temperature heat medium provides low-temperature heat load through the process, and the heated medium obtains high-temperature heat load through the heater 4. The outside provides power to the dual-energy compressor 6, forming an intermediate regenerative mechanical compression heat pump.

[0079] The regenerative thermodynamic cycle and intermediate regenerative mechanical compression heat pump proposed in this invention have the following effects and advantages:

[0080] (1) The regenerative thermodynamic cycle conforms to the thermodynamic principle; the regenerative pressure and regenerative temperature can be selected with a high degree of freedom.

[0081] (2) Regenerative thermal cycle, with corresponding and suitable regenerative amplitude under different heat source temperature differences, maintaining reasonable performance index.

[0082] (3) The regenerative thermodynamic cycle effectively reduces the cycle compression ratio, providing a basic working principle for increasing the flow rate of the circulating working fluid and selecting a large flow compressor.

[0083] (4) Intermediate regeneration mechanical compression heat pumps effectively achieve deep cooling or high-temperature heating, realizing and expanding the rational use of energy.

[0084] (5) Intermediate regeneration mechanical compression heat pump provides a variety of technical solutions, which is conducive to expanding the application range of mechanical compression heat pump and realizing efficient cold / heat utilization of mechanical energy.

Claims

1. A regenerative thermodynamic cycle refers to a closed-loop process consisting of eight sequential processes involving a certain mass of circulating working fluid: heat absorption from a low-temperature heat source (12), pressure increase (23), heat absorption from the circulating working fluid (34), pressure increase (45), heat release to a high-temperature heat source (56), pressure decrease (67), heat release to the circulating working fluid (78), and pressure decrease (81). The heat release in process 78 satisfies the heat absorption in process 34.

2. A regenerative thermodynamic cycle refers to a closed loop consisting of eight sequential processes involving a certain mass of circulating working fluid: heat release to a high-temperature heat source (81), pressure reduction (12), heat release to the circulating working fluid (23), pressure reduction (34), heat absorption from a low-temperature heat source (45), pressure increase (56), heat absorption from the circulating working fluid (67), and pressure increase (78). The non-closed loop 12345678 is formed after the heat release to the high-temperature heat source (81) is removed. The heat release in process 23 satisfies the heat absorption in process 67.

3. A regenerative thermodynamic cycle refers to a closed loop consisting of eight sequential processes involving a certain mass of circulating working fluid: heat absorption from a low-temperature heat source (81), pressure increase (12), heat absorption from the circulating working fluid (23), pressure increase (34), heat release to a high-temperature heat source (45), pressure decrease (56), heat release to the circulating working fluid (67), and pressure decrease (78). The non-closed loop 12345678 formed after eliminating the heat absorption from the low-temperature heat source (81) is also included. The heat release in process 67 satisfies the heat absorption in process 23.

4. The intermediate regenerative mechanical compression heat pump is mainly composed of a compressor, an expander, a low-temperature heat exchanger, a heater, and a regenerator. The compressor (1) has a circulating working fluid channel that connects to the expander (2) via the heater (4). The expander (2) also has a circulating working fluid channel that connects to itself via the regenerator (5). The expander (2) also has a circulating working fluid channel that connects to the compressor (1) via the low-temperature heat exchanger (3). The compressor (1) also has a circulating working fluid channel that connects to itself via the regenerator (5). The heater (4) also has a heated medium channel that connects to the outside. The low-temperature heat exchanger (3) also has a low-temperature heat medium channel that connects to the outside. The expander (2) is connected to the compressor (1) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

5. The intermediate regenerative mechanical compression heat pump is mainly composed of a compressor, an expander, a low-temperature heat exchanger, and a regenerator. The external heating medium channel is connected to the expander (2), the expander (2) is also connected to itself via the regenerator (5), the expander (2) is also connected to the compressor (1) via the low-temperature heat exchanger (3), the compressor (1) is also connected to itself via the regenerator (5), and the compressor (1) is also connected to the external heating medium channel. The low-temperature heat exchanger (3) is also connected to the external low-temperature heat medium channel. The expander (2) is connected to the compressor (1) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

6. The intermediate regenerative mechanical compression heat pump is mainly composed of a compressor, an expander, a heater and a regenerator; there is a low-temperature heat medium channel connected to the compressor (1) externally, the compressor (1) also has a low-temperature heat medium channel connected to itself via the regenerator (5), the compressor (1) also has a low-temperature heat medium channel connected to the expander (2) via the heater (4), the expander (2) also has a low-temperature heat medium channel connected to itself via the regenerator (5), the expander (2) also has a low-temperature heat medium channel connected to the outside; the heater (4) also has a heated medium channel connected to the outside, the expander (2) is connected to the compressor (1) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

7. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, an expander, a low-temperature heat exchanger, a heater, and a regenerator. The dual-energy compressor (6) has a circulating working fluid channel that connects to the expander (7) via the heater (4). The expander (7) also has a circulating working fluid channel that connects to itself via the regenerator (5). The expander (7) also has a circulating working fluid channel that connects to the dual-energy compressor (6) via the low-temperature heat exchanger (3). The dual-energy compressor (6) also has a circulating working fluid channel that connects to itself via the regenerator (5). The heater (4) also has a heated medium channel that connects to the outside. The low-temperature heat exchanger (3) also has a low-temperature heat medium channel that connects to the outside. The expander (7) is connected to the dual-energy compressor (6) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

8. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, an expander, a low-temperature heat exchanger, and a regenerator. The external heating medium channel is connected to the expander (7), the expander (7) is also connected to itself via the regenerator (5), the expander (7) is also connected to the dual-energy compressor (6) via the low-temperature heat exchanger (3), the dual-energy compressor (6) is also connected to itself via the regenerator (5), and the dual-energy compressor (6) is also connected to the external heating medium channel. The low-temperature heat exchanger (3) is also connected to the external heating medium channel. The expander (7) is connected to the dual-energy compressor (6) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

9. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, an expander, a heater, and a regenerator. It has an external low-temperature heat medium channel connected to the dual-energy compressor (6). The dual-energy compressor (6) also has a low-temperature heat medium channel connected to itself via the regenerator (5). The dual-energy compressor (6) also has a low-temperature heat medium channel connected to the expander (7) via the heater (4). The expander (7) also has a low-temperature heat medium channel connected to itself via the regenerator (5). The expander (7) also has a low-temperature heat medium channel connected to the outside. The heater (4) also has a heated medium channel connected to the outside. The expander (7) is connected to the dual-energy compressor (6) and transmits power, forming an intermediate regenerative mechanical compression heat pump.

10. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, a nozzle, a low-temperature heat exchanger, a heater, and a regenerator. The dual-energy compressor (6) has a circulating working fluid channel that connects to the nozzle (8) via the heater (4). The nozzle (8) also has a circulating working fluid channel that connects to itself via the regenerator (5). The nozzle (8) also has a circulating working fluid channel that connects to the dual-energy compressor (6) via the low-temperature heat exchanger (3). The dual-energy compressor (6) also has a circulating working fluid channel that connects to itself via the regenerator (5). The heater (4) also has a heated medium channel that connects to the outside. The low-temperature heat exchanger (3) also has a low-temperature heat medium channel that connects to the outside, thus forming an intermediate regenerative mechanical compression heat pump.

11. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, a nozzle, a low-temperature heat exchanger, and a regenerator. The external heating medium channel is connected to the nozzle (8), the nozzle (8) is also connected to itself via the regenerator (5), the nozzle (8) is also connected to the dual-energy compressor (6) via the low-temperature heat exchanger (3), the dual-energy compressor (6) is also connected to itself via the regenerator (5), and the dual-energy compressor (6) is also connected to the external heating medium channel. The low-temperature heat exchanger (3) is also connected to the external heating medium channel, thus forming an intermediate regenerative mechanical compression heat pump.

12. The intermediate regenerative mechanical compression heat pump is mainly composed of a dual-energy compressor, a nozzle, a heater, and a regenerator. There is a low-temperature heat medium channel connected to the dual-energy compressor (6) externally. The dual-energy compressor (6) also has a low-temperature heat medium channel connected to itself via the regenerator (5). The dual-energy compressor (6) also has a low-temperature heat medium channel connected to the nozzle (8) via the heater (4). The nozzle (8) also has a low-temperature heat medium channel connected to itself via the regenerator (5). The nozzle (8) also has a low-temperature heat medium channel connected to the outside. The heater (4) also has a heated medium channel connected to the outside, forming an intermediate regenerative mechanical compression heat pump.

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