Thermal storage and pressure accumulation cycle power generation system and its control method

Abstract

The heat storage and pressure storage circulating power generation system of the present invention includes a heat storage and pressure storage unit connected to a heat source, which absorbs thermal energy and transmits it to the heat storage and pressure storage unit, which raises the temperature and pressure of a first working fluid in the heat storage and pressure storage unit and then converts it into gas; a first power generation device that receives the high-temperature, high-pressure first working fluid released by the heat storage and pressure storage unit and converts the kinetic energy of the first working fluid into electrical energy; a heat storage tank that receives the first working fluid flowing through the first power generation device, performs heat exchange, and stores the thermal energy; and a cooling tank that receives the first working fluid from the heat storage tank, undergoes a phase transition of the first working fluid to a liquid, and then transmits it to the heat storage and pressure storage unit to form a circulation.

Description

Technical Field

[0001] This international application claims priority based on Chinese Patent Application No. 202110811805.X, filed with the China National Intellectual Property Administration on July 19, 2021, the title of the invention being a heat storage and pressure accumulation cycle power generation system and its control method, and incorporates the entire content thereof by reference into this international application.

[0002] The present invention relates to a heat storage and pressure accumulation cycle power generation system for converting thermal energy into electrical energy.

Background Art

[0003] The heat pipe type power generation water heater disclosed in Taiwan Patent Application Publication No. 202037860 filed by the applicant provides a pipeline for flowing a working fluid, at least one heat pipe body used for heat conduction and coupling with other devices, and at least one first power generation device installed between the flow pipelines of the heat pipe body for converting the kinetic energy of the working fluid into electrical energy, and at least one heat storage and pressure accumulation unit for performing heat exchange with the heat conduction part of the heat pipe body and storing heat energy to supply hot water.

[0004] The prior art uses solar energy, waste heat of electrical appliances, or a small temperature difference to generate electricity and store thermal energy. However, in the prior structural design, there is a limit to the pressure that the heat pipe can withstand, so the selectable working fluid and power generation efficiency are also limited.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The technical problem to be solved by the present invention is a heat storage and pressure accumulation unit connected to a heat source, which transmits the heat energy of the heat source to the heat storage and pressure accumulation unit to raise the temperature and increase the pressure of a first working fluid in the heat storage and pressure accumulation unit to convert it into a gas, a first power generation device that receives the high-temperature and high-pressure first working fluid discharged from the heat storage and pressure accumulation unit and converts the kinetic energy of the first working fluid into electrical energy, a heat storage tank that receives the first working fluid flowing through the first power generation device and stores the heat energy generated when the first working fluid undergoes heat exchange, and a cooling tank that receives the first working fluid from the heat storage tank and transmits the first working fluid to the heat storage and pressure accumulation unit after phase transition to form a cycle, and provides a heat storage and pressure accumulation cycle power generation system.

[0006] Inside the heat storage tank, there are a plurality of heat exchangers for increasing the surface area to accelerate the heat exchange rate and for flowing in the first working fluid to perform heat exchange. The heat storage tank has a high-temperature layer, an intermediate-temperature layer, and a low-temperature layer, has an isolation effect and reduces heat diffusion, can retain the high temperature in the high-temperature layer, and the first working fluid flows through the cooling tank after performing heat exchange in the heat storage tank and is refluxed to the heat storage and pressure accumulation unit.

[0007] It further has a second working fluid for pressurizing or depressurizing the liquid first working fluid, and controls the temperature point at which the first working fluid undergoes phase transition by the pressure generated by the second working fluid.

[0008] Preferably, the control valve divided by temperature is installed between the first power generation device and the heat storage tank. The first working fluid flows through the first power generation device to generate electricity and then flows through the control valve divided by temperature. The control valve divided by temperature controls the first working fluid to flow into the high-temperature layer, or the intermediate-temperature layer, or the low-temperature layer for heat exchange based on the waste heat temperature after the first working fluid generates electricity. By doing so, the temperature of the high-temperature layer is maintained, and the effects of storing electricity and generating electricity at night are obtained.

[0009] Preferably, a circulation reflow pipe is further provided between the first power generation device and the control valve separated by the temperature, and has flywheel blades to maintain continuous operation of the first power generation device.

[0010] Preferably, a heater is further provided inside the heat storage tank, which stores high temperature with low-cost off-peak power or surplus green power, and generates electricity with the stored energy during peak hours of high-cost power use to balance the power grid and achieve the effect of obtaining benefits.

[0011] A plurality of control valves, namely a heat energy inlet control valve, a heat energy outlet control valve, a first working fluid reflow port control valve, and a first working fluid outlet control valve, are further provided in the heat storage and pressure accumulation unit, and these control valves are used to control the input and output of heat energy and the input and output of the first working fluid of the first heat storage and pressure accumulation tank, the second heat storage and pressure accumulation tank, and the third heat storage and pressure accumulation tank of the heat storage and pressure accumulation unit.

[0012] Preferably, the first working fluid in liquid form is stored inside two of these heat storage and pressure accumulation tanks of the heat storage and pressure accumulation unit. Therefore, the time required for the first working fluid to increase in temperature and for the heat storage and pressure accumulation tank to decrease in temperature is shortened, and the power generation efficiency is designed to be increased.

[0013] Preferably, the present invention further includes a working fluid adjustment device installed between the heat storage and pressure accumulation unit and the first power generation device or the cooling tank. When it is detected that the external environmental temperature has changed, the basic pressure of the system maintained by the second working fluid is adjusted to modify the cooling temperature of the first working fluid, thereby enhancing the circulation efficiency.

[0014] Preferably, the present invention further includes a liquid level detector installed inside the heat storage tank. When it is detected that the first working fluid is insufficient, the working fluid adjustment device replenishes the first working fluid and causes the first working fluid to flow to perform heat circulation.

[0015] In addition, a water supply tower is installed between the heat storage tank and the cooling tank. An airbag is installed inside the water supply tower, and a second power generation device is installed between the water supply tower and the cooling tank. After the first working fluid flows into the water supply tower and the airbag expands, the liquid originally stored in the water supply tower is allowed to flow out and the second power generation device is driven. When the airbag contracts after the first working fluid is cooled and flows out, the liquid flows back into the water supply tower and the second power generation device is driven again to generate electricity more effectively.

[0016] The present invention further includes a control method for a heat storage and pressure accumulation circulation thermal power generation system, including the following steps. Turn on the heat storage and pressure accumulation unit and receive thermal energy from a heat source, and convert the first working fluid in the heat storage and pressure accumulation unit into the first working fluid that has reached the operating pressure and temperature and has vaporized. The vaporized first working fluid is controlled to reach the heat storage tank after flowing through the first power generation device, and the first power generation device is driven to generate electricity by the kinetic energy of the vaporized first working fluid (step A). After performing heat exchange on the first working fluid vaporized in the heat storage tank, flow the vaporized first working fluid into the cooling tank for cooling to return it to the liquid first working fluid, and reflux the liquid first working fluid to the heat storage and pressure accumulation unit (step B). Turn off the heat storage and pressure accumulation unit (step C). Repeat steps (A) to (C) at least once to form a heat storage and pressure accumulation power generation cycle (step D).

[0017] Preferably, step (A) further includes the following steps. Open the thermal energy inlet control valve and the thermal energy outlet control valve and switch to the first heat storage and pressure accumulation tank (step A1). The first heat storage and pressure accumulation tank receives thermal energy from a heat source. When the first working fluid in the first heat storage and pressure accumulation tank reaches the operating pressure and temperature, the first working fluid satisfies the vaporization operating conditions, opens the first working fluid outlet control valve, switches to the first heat storage and pressure accumulation tank, and opens the first working fluid reflux port control valve to switch to the third heat storage and pressure accumulation tank. The vaporized first working fluid flows through the first power generation device, and the first power generation device is driven by the kinetic energy of the vaporized first working fluid (step A2). Step (A3) of switching the thermal energy inlet control valve and the thermal energy outlet control valve to the second heat storage and pressure accumulation tank.

[0018] Preferably, step (B) further includes the following steps. The vaporized first working fluid flows into a water supply tower after passing through the heat storage tank. After the airbag in the water supply tower expands, the liquid originally stored in the water supply tower flows out, and the second power generation device is driven to perform primary power generation by the kinetic energy of the liquid (step B1). Step (B2) of driving the second power generation device to perform secondary power generation while the airbag shrinks as the first working fluid is cooled and returns to a liquid state, and refluxing the liquid into the water supply tower.

[0019] For other effects of the present invention and detailed contents of the embodiments, the following drawings will be described together.

[0020] To more clearly explain the embodiments of the present invention or the technical methods according to the prior art, the attached drawings necessary for the description of the embodiments or the prior art will be briefly described below. Obviously, the attached drawings in the following description only show some embodiments of the present invention, and those skilled in the art can obtain other attached drawings based on these attached drawings without exercising creativity.

Brief Description of the Drawings

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Modes for Carrying Out the Invention

[0022] The positional relationships in the following embodiments include up, down, left, and right, and are all based on the drawing directions of the members in the drawings unless otherwise specified.

[0023] Figs. 1 to 4 show a heat storage and pressure accumulation cycle power generation system according to the present invention, which is a heat storage and pressure accumulation unit 20 connected to a heat source 10. The heat storage and pressure accumulation unit 20 transmits the heat energy of the heat source 10 to the heat storage and pressure accumulation unit 20 to heat up and increase the pressure of the first working fluid in the heat storage and pressure accumulation unit 20 and convert it into a gas when discharging. A heat storage and pressure accumulation unit 20, a first power generation device 41 that receives the high-temperature and high-pressure first working fluid discharged from the heat storage and pressure accumulation unit 20 and converts the kinetic energy of the first working fluid into electrical energy, and the first power generation device 41 A heat storage tank 40 that receives the first working fluid flowing through it and performs heat exchange on the first working fluid to store heat energy, and a cooling tank 50 that receives the first working fluid from the heat storage tank 40 and transfers the first working fluid after phase transition to a liquid and then transmits it to the heat storage and pressure accumulation unit 20 to form a cycle. The heat source 10 may be waste heat of a process, solar energy heat collection, or other heat sources.

[0024] Inside the heat storage tank 40 or inside the cooling tank 50, there is further a second working fluid filled in the space other than the liquid first working fluid. The second working fluid is used to pressurize or depressurize the liquid first working fluid. The temperature point at which the first working fluid undergoes a phase transition is controlled by the pressure generated by the second working fluid.

[0025] As shown in Fig. 2, a water supply tower 30 is further installed between the heat storage tank 40 and the cooling tank 50. An air bag 32 is installed inside the water supply tower 30, and a second power generation device 31 is installed between the water supply tower 30 and the cooling tank 50. After the first working fluid flows into the water supply tower 30 and the air bag 32 expands, the liquid originally stored in the water supply tower 30 flows out and drives the second power generation device 31. When the air bag 32 shrinks after the first working fluid is cooled and flows out, the liquid is refluxed into the water supply tower 30 and the second power generation device 31 is re-driven at the same time to generate electricity more effectively. In this embodiment, the second power generation device 31 is a waterwheel generator.

[0026] As shown in Fig. 3, the present invention further has a plurality of control valves installed in the heat storage and pressure accumulation unit 20. The heat storage and pressure accumulation unit 20 includes a first heat storage and pressure accumulation tank 21, a second heat storage and pressure accumulation tank 22, and a third heat storage and pressure accumulation tank 23. These control valves are respectively a heat energy inlet control valve 61, a heat energy outlet control valve 62, a first working fluid reflow port control valve 64, and a first working fluid outlet control valve 63. These control valves are used to control the input and output of heat energy of these heat storage and pressure accumulation tanks and the input and output of the first working fluid.

[0027] In actual use, the first working fluid is stored in two of these heat storage and pressure accumulation tanks, and the other one is an empty tank. After the first working fluid in one of the heat storage and pressure accumulation tanks vaporizes, it flows through the first power generation device 41, the heat storage tank 40, the water supply tower 30, and the cooling tank 50 and is stored in the empty tank. The heat storage and pressure accumulation tank that originally stored the first working fluid becomes an empty tank and then becomes the heat storage and pressure accumulation tank used when circulating and storing the first working fluid next time. By doing so, the time required for the temperature rise of the first working fluid and the temperature drop of the heat storage and pressure accumulation tank is shortened, and the power generation efficiency is improved.

[0028] As shown in Fig. 4, the heat storage tank 40 has a high-temperature layer 401, an intermediate-temperature layer 402, and a low-temperature layer 403. Inside the heat storage tank 40, it is divided into a high-temperature layer 401, an intermediate-temperature layer 402, and a low-temperature layer 403, and has an isolation effect, so as to reduce the heat diffusion of the stored energy. When the first working fluid flows through the heat storage tank 40, the first working fluid exchanges heat inside the heat storage tank 40, stores the waste heat of the first working fluid in the heat storage tank 40, and uses it at night or provides it as a standby.

[0029] In other embodiments, in order to balance the power grid and obtain the profit from the power price difference, two heaters 46 are installed inside the heat storage tank 40, which are respectively located in the high-temperature layer 401 and the intermediate-temperature layer 402. High-temperature heat storage is performed using low-price off-peak power or surplus green power, and power generation is performed using the stored energy during the peak period of high-price power use, thereby balancing the power grid and achieving the effect of obtaining profit.

[0030] In this embodiment, there is further a control valve 42 for classification according to the temperature installed between the first power generation device 41 and the heat storage tank 40. The first working fluid flows through the first power generation device 41 to generate power and then flows through the control valve 42 for classification according to the temperature. The control valve 42 for classification according to the temperature controls the first working fluid to flow into the high-temperature layer 401 or the middle and low-temperature layers 402, 403 for heat exchange based on the waste heat temperature after the first working fluid generates power. By doing so, the temperature of the high-temperature layer 401 is maintained, and the power generation and power storage effects at night are maintained.

[0031] A circulation reflux pipe 43 is further installed between the first power generation device 41 and the control valve 42 for classification according to the temperature, maintaining the continuous operation of the first power generation device 41 having flywheel blades.

[0032] The first working fluid flows into the cooling tank 50 after heat exchange in the heat storage tank 40. After the cooling tank 50 cools the first working fluid back to a liquid, it is refluxed to the heat storage and pressure accumulation unit 20. In this embodiment, a plurality of heat exchangers 44 for increasing the surface area and accelerating the heat exchange rate are provided inside the heat storage tank 40.

[0033] In this embodiment, it further has an operating fluid regulating device 70 installed between the heat storage and pressure accumulation unit 20 and the first power generation device 41 or the cooling tank 50, and a liquid level detector (not shown) 15 is installed inside the heat storage tank 40. When the liquid level detector detects a shortage of the first working fluid, the operating fluid regulating device 70 is turned on to replenish the first working fluid. Alternatively, when detecting a change in the external environmental temperature, the operating fluid regulating device 70 adjusts the basic pressure of the system maintained by the second working fluid, thereby modifying the cooling temperature of the first working fluid and increasing the circulation efficiency.

[0034] As shown in FIGS. 5 to 10, the present invention further provides a control method for a heat storage and pressure accumulation circulating thermoelectric power generation system, including the following steps. Transmit the thermal energy of the heat source 10 to the heat storage and pressure accumulation unit 20. When the first working fluid in the heat storage and pressure accumulation unit 20 reaches the operating pressure and operating temperature and the first working fluid satisfies the vaporization operating conditions, it is converted into the vaporized first working fluid, and control is performed so that the vaporized first working fluid flows from the first power generation device 41 into the heat storage tank 40, and drive the first power generation device 41 to generate electricity by the kinetic energy of the vaporized first working fluid (step A). After performing heat exchange on the vaporized first working fluid in the heat storage tank 40, flow the vaporized first working fluid into the cooling tank 50 for cooling and return it to the liquid first working fluid, and reflux the liquid first working fluid to the heat storage and pressure accumulation unit 20 (step B). Turn off the heat storage and pressure accumulation unit 20 (step C). Repeat steps (A) to (C) at least once to form a heat storage and pressure accumulation power generation cycle (step D).

[0035] In this embodiment, it includes steps A1 to A7, steps B1 to B3, and step C1, and further forms a more efficient circulating power generation. The steps of the heat storage and pressure accumulation power generation cycle are as follows. Open the heat energy inlet control valve 61 and the heat energy outlet control valve 62 and switch to the first heat storage and pressure accumulation tank 21. At this time, the first working fluid in liquid form is stored in the first heat storage and pressure accumulation tank 21 and the second heat storage and pressure accumulation tank 22, and the third heat storage and pressure accumulation tank 23 is an empty tank (step (A1)). When the first heat storage and pressure accumulation tank 21 receives heat energy from the heat source 10, the first working fluid in the first heat storage and pressure accumulation tank 21 reaches the operating pressure and temperature, and when the first working fluid satisfies the vaporization condition, open the first working fluid outlet control valve 63 and switch to the first heat storage and pressure accumulation tank 21, and open the first working fluid reflux port control valve 64 to switch to the third heat storage and pressure accumulation tank 23, flow the vaporized first working fluid to the first power generation device 41, and drive the first power generation device 41 by the kinetic energy of the vaporized first working fluid (step (A2)). Switch the heat energy inlet control valve 61 and the heat energy outlet control valve 62 to the second heat storage and pressure accumulation tank 22 (step (A3)). Flow the vaporized first working fluid into the heat storage tank 40, exchange the waste heat to the high temperature layer 401, the intermediate temperature layer 402 and the low temperature layer 403, or the intermediate temperature layer 402 and the low temperature layer 403 of the heat storage tank 40, and then flow it into the water supply tower 30. After expanding the air bag 32 in the water supply tower 30, let the liquid originally stored in the water supply tower 30 flow out, and drive the second power generation device 31 to perform primary power generation by the kinetic energy of the liquid (step (B1)). Flow the vaporized first working fluid into the cooling tank 50, cool the vaporized first working fluid to return it to the liquid state, and reflux it to the third heat storage and pressure accumulation tank 23. When the first working fluid is cooled and returns to the liquid state, the air bag 32 shrinks, and at the same time as the liquid refluxes into the water supply tower, drive the second power generation device 31 to perform secondary power generation, forming a primary power generation process. At this time, the first working fluid in liquid form is stored in the third heat storage and pressure accumulation tank 23, and the first heat storage and pressure accumulation tank 21 is an empty tank (step (B2)). Close the first working fluid reflux port control valve 64 and the first working fluid outlet control valve 63 (step (C1)). The second heat storage and pressure accumulation tank 22 receives thermal energy from the heat source 10. When the first working fluid in the second heat storage and pressure accumulation tank 22 reaches the operating pressure and temperature and the first working fluid satisfies the vaporization operating conditions, the first working fluid outlet control valve 63 is opened and switched to the second heat storage and pressure accumulation tank 22, and the first working fluid reflow port control valve 64 is opened and switched to the first heat storage and pressure accumulation tank 21. The vaporized first working fluid is flowed to the first power generation device 41, and the first power generation device 41 is driven by the kinetic energy of the vaporized first working fluid (step A4). The step of switching the thermal energy inlet control valve 61 and the thermal energy outlet control valve 62 to the third heat storage and pressure accumulation tank 23 (step A5). The vaporized first working fluid is flowed into the heat storage tank 40, and after exchanging the waste heat to the high temperature layer 401, the intermediate temperature layer 402, and the low temperature layer 403, or the intermediate temperature layer 402 and the low temperature layer 403 of the heat storage tank 40, it is flowed into the water supply tower 30. After expanding the air bag 32 in the water supply tower 30, the liquid originally stored in the water supply tower 30 is allowed to flow out, and the second power generation device 31 is driven by the kinetic energy of the liquid (step B1). The vaporized first working fluid is flowed into the cooling tank 50 to cool the vaporized first working fluid back to a liquid and reflux it to the first heat storage and pressure accumulation tank 21. When the first working fluid is cooled and returned to a liquid, the air bag 32 shrinks, and at the same time as the liquid is refluxed into the water supply tower 30, the second power generation device 31 is driven to perform secondary power generation, forming a secondary power generation process. At this time, the first heat storage and pressure accumulation tank 21 stores the liquid first working fluid, and the second heat storage and pressure accumulation tank 22 is an empty tank (step B2). The step of closing the first working fluid reflow port control valve 64 and the first working fluid outlet control valve 63 (step C1). The third heat storage and pressure accumulation tank 23 receives thermal energy from the heat source 10. When the first working fluid in the third heat storage and pressure accumulation tank 23 reaches the operating pressure and temperature and the first working fluid satisfies the vaporization operating conditions, the first working fluid outlet control valve 63 is opened and switched to the third heat storage and pressure accumulation tank 23, and the first working fluid reflow port control valve 64 is opened and switched to the second heat storage and pressure accumulation tank 22. The vaporized first working fluid flows from the first power generation device 41 into the second heat storage and pressure accumulation tank 22, and the first power generation device 41 is driven by the kinetic energy of the vaporized first working fluid (step A6). Step (A7) of switching the thermal energy inlet control valve 61 and the thermal energy outlet control valve 62 to the first heat storage and pressure accumulation tank 21. The vaporized first working fluid flows into the heat storage tank 40, exchanges waste heat to the high temperature layer 401, the intermediate temperature layer 402, and the low temperature layer 403, or the intermediate temperature layer 402 and the low temperature layer 403 of the heat storage tank 40, and then flows into the water supply tower 30. After the airbag 32 in the water supply tower 30 expands, the liquid originally stored in the water supply tower 30 flows out, and the second power generation device 31 is driven by the kinetic energy of the liquid (step B1). The vaporized first working fluid flows into the cooling tank 50 to cool the vaporized first working fluid back to a liquid and reflux it to the second heat storage and pressure accumulation tank 22. When the first working fluid is cooled and returns to a liquid, the airbag 32 shrinks, and at the same time as the liquid refluxes into the water supply tower 30, the second power generation device 31 is driven to perform secondary power generation, forming a third power generation process. At this time, the second heat storage and pressure accumulation tank 22 stores the liquid first working fluid, and the third heat storage and pressure accumulation tank 23 is an empty tank (step B2). Step (C1) of closing the first working fluid reflow port control valve 64 and the first working fluid outlet control valve 63. Step (D) of repeating the above steps (A1) to (C1) once to form a heat storage and pressure accumulation power generation cycle.

[0036] The above-described embodiments are merely for explaining the technical idea and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and do not limit the scope of the claims of the present invention. Therefore, improvements or modifications having various similar effects made without departing from the spirit of the present invention shall be included in the claims described below.

Description of Reference Numerals

[0037] Steps A to D Steps A1 to A7 Steps B1 to B2 Step C1 10 Heat source 20 Heat storage and pressure accumulation unit 21 First heat storage and pressure accumulation tank 22 Second heat storage and pressure accumulation tank 23 Third heat storage and pressure accumulation tank 30 Water supply tower 31 Second power generation device 32 Airbag 40 Heat storage tank 401 High temperature layer 402 Intermediate temperature layer 403 Low temperature layer 41 First power generation device 42 Control valve for classification by temperature 43 Loop reflow pipe 44 Heat exchanger 46 Heater 50 Cooling tank 61 Heat energy inlet control valve 62 Heat energy outlet control valve 63 First working fluid outlet control valve 64 First working fluid reflow port control valve

Claims

1. A heat storage and pressure accumulation unit connected to a heat source, the heat storage and pressure accumulation unit transmitting the heat energy of the heat source to raise the temperature and increase the pressure of a first working fluid in the heat storage and pressure accumulation unit, and converting it into a gas when releasing it, and a heat storage and pressure accumulation unit, A first power generation device that receives the high-temperature and high-pressure first working fluid released from the heat storage and pressure accumulation unit and converts the kinetic energy of the first working fluid into electrical energy, A heat storage tank that receives the first working fluid flowing through the first power generation device, performs heat exchange of the first working fluid, and stores heat energy, A cooling tank that receives the first working fluid from the heat storage tank and transmits the first working fluid to the heat storage and pressure accumulation unit after phase transition, comprising: A plurality of control valves are installed in the heat storage and pressure accumulation unit, The heat storage and pressure accumulation unit includes a first heat storage and pressure accumulation tank, a second heat storage and pressure accumulation tank, and a third heat storage and pressure accumulation tank, The control valve is used to control the input and output of the heat energy of the heat storage and pressure accumulation tank and the input and output of the first working fluid, and is characterized by a heat storage and pressure accumulation cycle power generation system.

2. The heat storage tank and / or the cooling tank further has a second working fluid for pressurizing or depressurizing the liquid first working fluid, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 1.

3. The heat storage tank has a plurality of heat exchangers inside, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 1.

4. A control valve for separating by temperature is installed between the first power generation device and the heat storage tank, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 3.

5. A circulation reflow pipe is installed between the first power generation device and the control valve for separating by temperature, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 4.

6. The heat storage tank has a high-temperature layer, an intermediate temperature layer, and a low-temperature layer, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 1.

7. At least one heater is installed inside the heat storage tank, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 1.

8. The first working fluid in liquid form is stored inside two of these heat storage and pressure accumulation tanks, and is characterized by the heat storage and pressure accumulation cycle power generation system according to claim 1.

9. The heat storage and pressure accumulation power generation system according to claim 1, further comprising at least one working fluid regulating device installed between the heat storage and pressure accumulation unit and the first power generation device or the cooling tank.

10. The heat storage and pressure accumulation power generation system according to any one of claims 1 to 9, further comprising a water supply tower between the heat storage tank and the cooling tank.

11. The heat storage and pressure accumulation power generation system according to claim 10, having a second power generation device between the water supply tower and the cooling tank.

12. The heat storage and pressure accumulation power generation system according to claim 11, wherein an air bag is installed inside the water supply tower.

13. Step (A): The heat storage and pressure accumulation unit receives thermal energy from a heat source, brings the first working fluid in the heat storage and pressure accumulation unit to the operating pressure and temperature, converts it into the first working fluid in which the first working fluid is vaporized, controls so that the vaporized first working fluid reaches the heat storage tank after flowing through the first power generation device, and drives the first power generation device to generate electricity by the kinetic energy of the vaporized first working fluid; Step (B): After performing heat exchange on the vaporized first working fluid in the heat storage tank, the vaporized first working fluid is poured into the cooling tank for cooling and returned to the liquid first working fluid, and the first working fluid is refluxed to the heat storage and pressure accumulation unit; Step (C): Closing the first working fluid reflow port control valve and the first working fluid outlet control valve to stop the operation of the heat storage and pressure accumulation unit; Step (D): By sequentially executing steps (A) to (C) at least once, forming a heat storage and pressure accumulation power generation cycle, a control method of a heat storage and pressure accumulation power generation system, characterized by including.

14. The step (B) is Step (B1): After the vaporized first working fluid flows through the heat storage tank and is poured into the water supply tower, the air bag in the water supply tower is inflated, then the liquid originally stored in the water supply tower is allowed to flow out, and the second power generation device is driven to perform primary power generation by the kinetic energy of the liquid. When the first working fluid is cooled and returns to a liquid, the airbag shrinks, and at the same time as the liquid is refluxed into the water supply tower, step (B2) of driving the second power generation device so as to perform secondary power generation is further included. A method for controlling a heat storage and pressure accumulation cycle power generation system according to claim 13, characterized in that it comprises the above.

15. The heat storage and pressure accumulation unit has a first heat storage and pressure accumulation tank, a second heat storage and pressure accumulation tank, and a third heat storage and pressure accumulation tank, and the step (A) is A step (A1) of opening a heat energy inlet control valve and a heat energy outlet control valve and switching to the first heat storage and pressure accumulation tank; When the first heat storage and pressure accumulation tank receives heat energy from a heat source and the first working fluid in the first heat storage and pressure accumulation tank reaches an operating pressure and an operating temperature, the first working fluid satisfies the vaporization operating conditions, and the first working fluid outlet control valve is opened and switched to the first heat storage and pressure accumulation tank, the first working fluid reflux port control valve is opened and switched to the third heat storage and pressure accumulation tank, and the vaporized first working fluid flows to the first power generation device, and the first power generation device is driven by the kinetic energy of the vaporized first working fluid. Step (A2); A method for controlling a heat storage and pressure accumulation cycle power generation system according to claim 13, further comprising a step (A3) of switching the heat energy inlet control valve and the heat energy outlet control valve to a second heat storage and pressure accumulation tank.

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