A power and heating supply system based on organic rankine cycle using medium-deep geothermal energy

Abstract

The utility model relates to a kind of power supply heating system for utilizing middle-deep geothermal energy based on organic rankine cycle, belong to power supply heating technical field;Including buried pipe heat exchange system, the inlet and the outlet of buried pipe heat exchange system are connected with water collector and water distributor respectively, evaporator is arranged between water collector and water distributor;The evaporator is also set between condenser and expander generator set, and condenser is connected with expander generator set;Condenser is connected with heating system and cooling water system simultaneously;Solve the problem that current middle-deep geothermal energy application scene is single.

Description

Technical Field

[0001] This utility model belongs to the field of power generation and heating technology, specifically relating to a power generation and heating system based on the organic Rankine cycle and utilization of medium-deep geothermal energy. Background Technology

[0002] Geothermal energy, as a clean and renewable energy source, boasts abundant reserves and wide distribution, possessing enormous development and utilization potential, and its application in the heating sector is becoming increasingly widespread. Medium-deep geothermal energy is a typical low-grade, medium-low temperature heat source. Organic Rankine cycle technology is a highly efficient medium-low temperature heat energy utilization technology. Due to the low boiling point of the organic working fluid, the evaporation temperature within the evaporator is also low, allowing it to be heated into high-pressure steam at relatively low temperatures, which is beneficial for the recovery of waste heat from medium-low temperature heat sources. Currently, medium-deep geothermal energy is mainly used for power generation or industrial park heating, with relatively limited application scenarios and potential for further improvement in energy utilization efficiency. Deep and efficient utilization of shallow geothermal energy based on the organic Rankine cycle can not only generate electricity and store it in electrochemical energy storage devices to meet the low-load electricity needs of users such as charging new energy vehicles and residential electricity consumption, but also meet users' heat load requirements, enabling cascade utilization of geothermal energy and further improving energy efficiency. Utility Model Content

[0003] This invention overcomes the shortcomings of existing technologies and proposes a power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy; it solves the problem of the limited application scenarios for medium-deep geothermal energy.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0005] A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy includes a buried pipe heat exchange system. The inlet and outlet of the buried pipe heat exchange system are connected to a water collector and a water distributor, respectively. An evaporator is installed between the water collector and the water distributor. The evaporator is also installed between a condenser and an expander generator set, and the condenser is connected to the expander generator set. The condenser is also connected to both a heating system and a cooling water system.

[0006] Furthermore, the inlet of the water collector is connected to the first outlet of the evaporator, and a first valve is installed on the pipeline between the water collector and the evaporator; the outlet of the water collector is connected to the inlet of the buried pipe heat exchange system; the inlet of the water distributor is connected to the outlet of the buried pipe heat exchange system, the outlet of the water distributor is connected to the first inlet of the evaporator, and a second valve is installed on the pipeline between the water distributor and the evaporator.

[0007] Furthermore, the inlet of the water collector is also connected to the municipal water supply pipeline, and a third valve and a water replenishment pump are installed on the pipeline between the water collector and the municipal water supply pipeline.

[0008] Furthermore, the second outlet of the evaporator is connected to the inlet of the expander generator set, and a fourth valve is installed on the pipeline between the evaporator and the expander generator set; the second inlet of the evaporator is connected to the first outlet of the condenser, and an organic working fluid pump is installed on the pipeline between the evaporator and the condenser; a fifth valve is installed on the pipeline between the evaporator and the organic working fluid pump; a sixth valve is installed on the pipeline between the organic working fluid pump and the condenser; the first inlet of the condenser is connected to the outlet of the expander generator set, and a seventh valve is installed on the pipeline between the condenser and the expander generator set.

[0009] Furthermore, the expander generator set is electrically connected to the electrochemical energy storage device.

[0010] Furthermore, the second inlet of the condenser is connected to both a first pipeline and a second pipeline. The first pipeline is connected to the heating return water pipeline, and the second pipeline is connected to the cooling water outlet of the cooling tower. An eighth valve and a heating network circulating water pump are installed on the first pipeline, and a ninth valve and a cooling water circulating pump are installed on the second pipeline.

[0011] Furthermore, the second outlet of the condenser is connected to both a third pipe and a fourth pipe. The third pipe is connected to the heating and water supply pipe, and the fourth pipe is connected to the cooling water inlet of the cooling tower. A tenth valve is installed on the third pipe, and an eleventh valve is installed on the fourth pipe.

[0012] Furthermore, the cooling tower is also connected to a cooling water supply pipe.

[0013] The beneficial effects of this utility model compared to the prior art are as follows:

[0014] This invention provides a power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy. It can not only meet the heat load demand of users, but also meet the low-load electricity demand of users such as charging new energy vehicles and domestic electricity consumption, realizing the cascade utilization of energy and improving energy utilization efficiency. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Among them, 1 is the underground pipe heat exchange system, 2 is the water collector, 3 is the water distributor, 4 is the evaporator, 5 is the expander generator set, 6 is the condenser, 7 is the first valve, 8 is the second valve, 9 is the municipal tap water pipeline, 10 is the third valve, 11 is the water supply pump, 12 is the fourth valve, 13 is the organic working fluid pump, 14 is the fifth valve, 15 is the sixth valve, 16 is the seventh valve, 17 is the electrochemical energy storage device, 18 is the heating return water pipeline, 19 is the cooling tower, 20 is the eighth valve, 21 is the heating network circulating water pump, 22 is the ninth valve, 23 is the cooling water circulating pump, 24 is the heating water supply pipeline, 25 is the tenth valve, 26 is the eleventh valve, 27 is the cooling water supply pipeline, and 28 is the electricity customer. Detailed Implementation

[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0019] like Figure 1 As shown, this utility model provides a power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy, including a buried pipe heat exchange system 1. The inlet and outlet of the buried pipe heat exchange system 1 are connected to a water collector 2 and a water distributor 3, respectively. An evaporator 4 is provided between the water collector 2 and the water distributor 3. The evaporator 4 is also provided between a condenser 6 and an expander generator set 5, and the condenser 6 is connected to the expander generator set 5. The condenser 6 is also connected to both the heating system and the cooling water system.

[0020] The inlet of the water collector 2 is connected to the first outlet of the evaporator 4, and a first valve 7 is installed on the pipeline between the water collector 2 and the evaporator 4; the outlet of the water collector 2 is connected to the inlet of the buried pipe heat exchange system 1. The inlet of the water distributor 3 is connected to the outlet of the buried pipe heat exchange system 1, and the outlet of the water distributor 3 is connected to the first inlet of the evaporator 4; a second valve 8 is installed on the pipeline between the water distributor 3 and the evaporator 4.

[0021] The inlet of the water collector 2 is also connected to the municipal water supply pipe 9. A third valve 10 and a water replenishment pump 11 are installed on the pipeline between the water collector 2 and the municipal water supply pipe 9 to replenish the water medium inside the buried pipe heat exchange system 1 through the municipal water supply pipe 9.

[0022] The second outlet of the evaporator 4 is connected to the inlet of the expander generator set 5, and a fourth valve 12 is installed on the pipeline between the evaporator 4 and the expander generator set 5. The second inlet of the evaporator 4 is connected to the first outlet of the condenser 6, and an organic working fluid pump 13 is installed on the pipeline between the evaporator 4 and the organic working fluid pump 13. A fifth valve 14 is installed on the pipeline between the evaporator 4 and the organic working fluid pump 13, and a sixth valve 15 is installed on the pipeline between the organic working fluid pump 13 and the condenser 6. The first inlet of the condenser 6 is connected to the outlet of the expander generator set 5, and a seventh valve 16 is installed on the pipeline between the condenser 6 and the expander generator set 5.

[0023] The expander generator set 5 is electrically connected to the electrochemical energy storage device 17, and the electricity generated by the expander generator set 5 is stored in the electrochemical energy storage device 17.

[0024] The second inlet of the condenser 6 is connected to both a first pipeline and a second pipeline. The first pipeline is connected to the heating return water pipeline 18, and the second pipeline is connected to the cooling water outlet of the cooling tower 19. An eighth valve 20 and a heating network circulating water pump 21 are installed on the first pipeline, and a ninth valve 22 and a cooling water circulating pump 23 are installed on the second pipeline.

[0025] The second outlet of the condenser 6 is connected to both a third pipe and a fourth pipe. The third pipe is connected to the heating water supply pipe 24, and the fourth pipe is connected to the cooling water inlet of the cooling tower 19. A tenth valve 25 is installed on the third pipe, and an eleventh valve 26 is installed on the fourth pipe.

[0026] The cooling tower 19 is also connected to a cooling water supply pipe 27, through which cooling water is supplied to the interior of the cooling tower 19.

[0027] The working principle of this utility model is as follows:

[0028] When the power generation and heating system is in normal working condition, valves 7, 8, 12, 14, 15, and 16 remain open, while valve 10 remains closed.

[0029] The water collector 2 disperses the water medium into different buried pipes within the buried pipe heat exchange system 1, heating the water medium inside the buried pipes by absorbing geothermal energy. The heated water medium then enters the water distributor 3, which transports it to the evaporator 4. Inside the evaporator 4, the organic working fluid (R245fa) absorbs heat from the water medium, converting it into high-temperature, high-pressure steam. The water medium, having absorbed heat, returns to the water collector 2, completing the heat exchange cycle. The high-temperature, high-pressure steam enters the expander generator set 5 to perform work, driving it to generate electricity. The generated electricity is then stored in the electrochemical energy storage device 17, providing stable power to the electricity customer 28. After performing work, the organic working fluid becomes low-temperature, low-pressure steam and enters the condenser 6, where it exchanges heat with the heating return water or cooling water, being cooled into a liquid organic working fluid. This liquid is then pressurized by the organic working fluid pump 13 and transported back to the evaporator 4, completing the work cycle.

[0030] When the water medium in the heat exchange cycle is insufficient, the third valve 10 is opened to replenish the water medium into the buried pipe heat exchange system 1 through the municipal tap water pipe 9.

[0031] During the heating season, open valves 8 (20) and 10 (25), and close valves 9 (22) and 11 (26). The return water is pressurized by the heating network circulation pump and enters the condenser 6, where it exchanges heat with low-temperature, low-pressure organic working fluid vapor. After being heated to the heating temperature, it is delivered to the user end for heating.

[0032] During the non-heating season, close valves 8 and 10, and open valves 9 and 11. Cooling water is pressurized by cooling water circulation pump 23 and enters the condenser 6. The cooling water cools the organic working fluid vapor discharged from the expander generator set 5. The heated cooling water enters the cooling tower 19 for further cooling and then returns to the condenser 6 via cooling water circulation pump 23, forming a cooling cycle.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy, characterized in that: The system includes a buried pipe heat exchange system (1), the inlet and outlet of which are connected to a water collector (2) and a water distributor (3) respectively. An evaporator (4) is provided between the water collector (2) and the water distributor (3). The evaporator (4) is also provided between a condenser (6) and an expander generator set (5). The condenser (6) is connected to the expander generator set (5). The condenser (6) is also connected to both the heating system and the cooling water system.

2. The power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 1, characterized in that: The inlet of the water collector (2) is connected to the first outlet of the evaporator (4), and a first valve (7) is provided on the pipeline between the water collector (2) and the evaporator (4); the outlet of the water collector (2) is connected to the inlet of the buried pipe heat exchange system (1); the inlet of the water distributor (3) is connected to the outlet of the buried pipe heat exchange system (1), and the outlet of the water distributor (3) is connected to the first inlet of the evaporator (4), and a second valve (8) is provided on the pipeline between the water distributor (3) and the evaporator (4).

3. The power generation and heating system based on the organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 1, characterized in that: The inlet of the water collector (2) is also connected to the municipal water supply pipe (9). A third valve (10) and a water replenishment pump (11) are installed on the pipeline between the water collector (2) and the municipal water supply pipe (9).

4. A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 1, characterized in that: The second outlet of the evaporator (4) is connected to the inlet of the expander generator set (5), and a fourth valve (12) is installed on the pipeline between the evaporator (4) and the expander generator set (5); the second inlet of the evaporator (4) is connected to the first outlet of the condenser (6), and an organic working fluid pump (13) is installed on the pipeline between the evaporator (4) and the condenser (6); a fifth valve (14) is installed on the pipeline between the evaporator (4) and the organic working fluid pump (13); a sixth valve (15) is installed on the pipeline between the organic working fluid pump (13) and the condenser (6); the first inlet of the condenser (6) is connected to the outlet of the expander generator set (5), and a seventh valve (16) is installed on the pipeline between the condenser (6) and the expander generator set (5).

5. A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 1, characterized in that: The expander generator set (5) is electrically connected to the electrochemical energy storage device (17).

6. A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 1, characterized in that: The second inlet of the condenser (6) is connected to both a first pipeline and a second pipeline. The first pipeline is connected to the heating return water pipeline (18), and the second pipeline is connected to the cooling water outlet of the cooling tower (19). An eighth valve (20) and a heating network circulating water pump (21) are installed on the first pipeline, and a ninth valve (22) and a cooling water circulating pump (23) are installed on the second pipeline.

7. A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 6, characterized in that: The second outlet of the condenser (6) is connected to both a third pipe and a fourth pipe. The third pipe is connected to the heating water supply pipe (24), and the fourth pipe is connected to the cooling water inlet of the cooling tower (19). A tenth valve (25) is installed on the third pipe, and an eleventh valve (26) is installed on the fourth pipe.

8. A power generation and heating system based on organic Rankine cycle for utilizing medium-deep geothermal energy according to claim 7, characterized in that: The cooling tower (19) is also connected to a cooling water supply pipe (27).

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