CN110186702B - Geothermal power generation test system and operation method thereof - Google Patents
Geothermal power generation test system and operation method thereof Download PDFInfo
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- CN110186702B CN110186702B CN201910467003.9A CN201910467003A CN110186702B CN 110186702 B CN110186702 B CN 110186702B CN 201910467003 A CN201910467003 A CN 201910467003A CN 110186702 B CN110186702 B CN 110186702B
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- 238000010248 power generation Methods 0.000 title claims abstract description 97
- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 230000005494 condensation Effects 0.000 claims abstract description 7
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 238000005339 levitation Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 238000005485 electric heating Methods 0.000 abstract description 10
- 239000000725 suspension Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a geothermal power generation test system and an operation method thereof, wherein the system comprises a generator set, a high-temperature side heat exchanger set connected with a evaporation end of the generator set, a low-temperature side heat exchanger set connected with a condensation end of the generator set, a high-temperature heat pump set connected with the high-temperature side heat exchanger set and the low-temperature side heat exchanger set, and an air-cooled heat pump set connected with the low-temperature side heat exchanger set. According to the geothermal power generation test system, the air-cooled heat pump unit is utilized to absorb heat in the air to heat the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, the hot water and the electric power are taken in a self-circulation mode, compared with a heating mode such as electric heating or gas heating, the energy loss is greatly reduced, and the power generation power and the total power generation amount of the power generation unit are tested in real time in the electric power self-circulation process; in addition, when the generator is a magnetic suspension generator, the mechanical loss can be reduced, the power generation efficiency of the generator is improved, and the test cost is further reduced.
Description
Technical Field
The invention relates to the technical field of geothermal power generation, in particular to a geothermal power generation test system and an operation method thereof.
Background
Geothermal resources are expected to become one of new energy sources for replacing traditional fossil energy sources due to the advantages of abundant reserves, environmental friendliness, renewable energy and the like. Geothermal power generation is a novel power generation technology using underground hot water and steam as power sources, and the basic principle is similar to thermal power generation, and according to the energy conversion principle, geothermal energy is firstly converted into mechanical energy and then into electric energy, geothermal power generation is actually realized by converting underground heat energy into mechanical energy and then converting the mechanical energy into electric energy into an energy conversion process or called geothermal power generation.
The geothermal power generation system is built in the field for testing various parameters of geothermal power generation equipment, so that a great amount of manpower, material resources and financial resources are consumed, and the geothermal power generation system is easily influenced or limited by natural and climatic conditions and the like, so that the field for testing geothermal related parameters becomes extremely difficult and impractical, and therefore, the building of the indoor geothermal power generation test system for simulating actual geothermal power generation becomes a solution.
However, the existing indoor geothermal power generation test system for simulating actual geothermal power generation is mainly provided by means of electric heating or gas heating and the like, and the energy consumption of the electric heating or gas heating and the like is high, and the power generation efficiency of the generator adopted by the existing geothermal power generation test system is not high, in addition, the existing geothermal power generation test system needs to test the power generation and the total power generation of the power generation system through independent external loads, so that the simulated geothermal power generation device test system becomes more complex, the occupied area is larger, the great waste of energy sources is also caused, the geothermal test cost is extremely high, and the development and progress of geothermal power generation technology are seriously affected. Accordingly, the prior art is still in need of improvement.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a geothermal power generation test system and an operation method thereof, which aims to solve the technical problems that the existing geothermal power generation test system directly prepares hot water through electric heating or gas heating and the like, and has high energy consumption, and the technical problems that the existing geothermal power generation test system needs to test the power generation and the total power generation of the power generation system through independent external loads.
The technical scheme of the invention is as follows:
the geothermal power generation test system comprises a generator set, a high-temperature side heat exchange unit connected with an evaporation end of the generator set, a low-temperature side heat exchange unit connected with a condensation end of the generator set, a high-temperature heat pump unit connected with the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, and an air-cooled heat pump unit connected with the low-temperature side heat exchange unit.
The geothermal power generation test system comprises a power generating set, a power generator and a condenser, wherein the power generating set comprises a working medium pump, an evaporator, a generator and a condenser which are sequentially and circularly connected.
The geothermal power generation test system is characterized in that the generator is a magnetic suspension generator.
The geothermal power generation test system comprises a geothermal power generation test system body, wherein the high-temperature side heat exchange unit comprises a high-temperature water tank and a first heat exchanger, and the high-temperature water tank, the first heat exchanger and an evaporator are sequentially and circularly connected; the low-temperature side heat exchange unit comprises a low-temperature water tank and a second heat exchanger, and the low-temperature water tank, the second heat exchanger and the condenser are sequentially and circularly connected.
The geothermal power generation test system comprises a high-temperature heat pump unit, a first heat exchanger, a second heat exchanger and a first compressor, wherein the high-temperature heat pump unit comprises the first compressor and a first throttle valve, and the first compressor, the first heat exchanger, the first throttle valve and the second heat exchanger are sequentially and circularly connected.
The geothermal power generation test system, wherein the generator is electrically connected with the first compressor.
The geothermal power generation test system comprises an air-cooled heat pump unit, a first throttling valve and an air-cooled heat exchanger, wherein the air-cooled heat pump unit comprises a second compressor, a plate heat exchanger, a second throttling valve and an air-cooled heat exchanger which are sequentially and circularly connected, and the plate heat exchanger is connected with a low-temperature water tank.
A method of operating a geothermal power generation test system, comprising the steps of:
starting an air-cooled heat pump unit, wherein the air-cooled heat pump unit is in a heat pump mode, the heat pump mode is that a plate heat exchanger is a condenser, the air-cooled heat exchanger is an evaporator, and water in a high-temperature water tank and a low-temperature water tank is heated to 40-50 ℃ by using the plate heat exchanger;
after the water temperature in the high-temperature water tank and the low-temperature water tank reaches 40-50 ℃, starting a high-temperature heat pump unit, and simultaneously, circularly exchanging heat between the high-temperature side heat exchanger unit and the low-temperature side heat exchanger unit by utilizing an organic working medium in a pipeline of the high-temperature heat pump unit to heat the water in the high-temperature water tank to 90-100 ℃;
after the temperature of water in the high-temperature water tank reaches 90-100 ℃, the air-cooled heat pump unit is closed, the high-temperature side heat exchange unit is used as a heat source of the generator, the low-temperature side heat exchange unit is used as a cold source of the generator, and the temperature difference and the pressure difference at two sides of the air inlet and the air outlet of the generator are used for driving the generator to generate electricity.
The operation method of the geothermal power generation test system further comprises the following steps:
when the temperature in the low-temperature water tank is higher than 50 ℃, the air-cooled heat pump unit starts a refrigeration mode, the refrigeration mode is that the plate heat exchanger is an evaporator, the air-cooled heat exchanger is a condenser, and the temperature of water in the low-temperature water tank is maintained at 40-50 ℃ through heat dissipation of water in the low-temperature side heat exchanger unit water tank by the plate heat exchanger.
The operation method of the geothermal power generation test system further comprises the following steps:
after the generator generates electricity, the high-temperature heat pump unit is driven to operate by combining the electric energy generated by the generator with commercial power, and the power generation power and the total power generation amount of the generator are measured by a first compressor in the high-temperature heat pump unit.
The beneficial effects are that: the invention provides a geothermal power generation test system and an operation method thereof, wherein the system comprises a generator set, a high-temperature side heat exchange unit connected with a steam end of the generator set, a low-temperature side heat exchange unit connected with a condensing end of the generator set, a high-temperature heat pump unit connected with the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, and an air-cooled heat pump unit connected with the low-temperature side heat exchange unit. The geothermal power generation test system provided by the invention utilizes the air-cooled heat pump unit to absorb heat in the air to heat the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, meanwhile, the hot water and the electric power adopt a self-circulation mode, compared with a heating mode such as electric heating or gas heating, the energy loss is greatly reduced, and the power generation power and the total power generation amount of the power generation unit are tested in real time in the electric power self-circulation process; in addition, when the generator adopts the magnetic suspension generator set, the mechanical loss is greatly reduced, the generating efficiency of the generator is improved, the electric energy is saved, and the test cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a geothermal power generation test system according to the present invention;
FIG. 2 is a schematic diagram of a generator set according to the present invention;
FIG. 3 is a flow chart of a method of operating a geothermal power test system according to the present invention.
Detailed Description
The invention provides a geothermal power generation test system and an operation method thereof, and the invention is further described in detail below in order to make the purposes, technical schemes and effects of the invention clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the geothermal power generation test system provided by the invention comprises a generator set 10, a high-temperature side heat exchanger set 20 connected with a evaporation end of the generator set, a low-temperature side heat exchanger set 30 connected with a condensation end of the generator set, a high-temperature heat pump set 40 connected with the high-temperature side heat exchanger set and the low-temperature side heat exchanger set, and an air-cooled heat pump set 50 connected with the low-temperature side heat exchanger set.
Geothermal resources are expected to become one of new energy sources for replacing traditional fossil energy sources due to the advantages of abundant reserves, environmental friendliness, renewable energy and the like. However, the design and optimization of geothermal generators used in the geothermal development and utilization process are based on actual geothermal parameters, and the efficiency of measuring the generators in the field geothermal well is obviously impractical, so that not only is a great deal of financial resources and material resources consumed, but also the generators are affected by the interference of field environmental factors such as weather and the like to affect the working efficiency, and therefore, a laboratory integrated hot water supply control system is necessary to be established to measure the power generation performance of the geothermal generators so as to guide the parameter optimization of the subsequent geothermal generators. At present, a hot water supply control system commonly used in a laboratory mainly adopts modes of electric heating or gas heating and the like, so that not only is energy consumption high, but also the power generation power and the total power generation amount of a power generation system are required to be tested through independent external loads, and the test system of the simulated geothermal power generation device is more complicated, and the occupied area of a power generation system is large.
In order to solve the technical problems, the geothermal power generation test system comprises a generator set, a high-temperature side heat exchange unit, a low-temperature side heat exchange unit, a high-temperature heat pump unit and an air-cooled heat pump unit, wherein the geothermal power generation test system can utilize the air-cooled heat pump unit to absorb heat in the air to heat hot water in the high-temperature side heat exchange unit and hot water in the low-temperature side heat exchange unit, meanwhile, the hot water and electric power adopt a self-circulation mode, and compared with the mode of heating the hot water by adopting electric heating or gas heating and the like, the energy loss is greatly reduced, and the power generation power and the total power generation amount of the generator set are tested in real time in the electric power self-circulation process; in addition, when the geothermal power generation test system adopts the magnetic suspension generator set to generate power, the mechanical loss can be greatly reduced, the power generation efficiency of the generator is improved, the generated electric energy is more, the efficiency is higher, the test cost is remarkably reduced, and the development of the geothermal power generation technology can be greatly promoted.
Referring to fig. 2, in a preferred embodiment, the generator set includes a working fluid pump 60, an evaporator 70, a generator 80, and a condenser 90, which are connected in a circulating manner. The generator set of the invention is a generator set utilizing an organic Rankine cycle, and the ideal organic Rankine cycle mainly comprises isentropic compression, isobaric heating, isentropic expansion and an isobaric condensation process.
The specific working process of the invention is as follows: the liquid organic working medium is heated in the evaporator to be changed into a gas state, the gas organic working medium expands in the generator to do work to drive the generator to rotate for power generation, the gas organic working medium is condensed into a liquid state in the condenser after power generation, and the liquid organic working medium is pressurized in the working medium pump after condensation.
In a preferred embodiment, the generator is a magnetic levitation generator. The magnetic suspension generator adopts the magnetic suspension bearing technology, so that the mechanical loss is greatly reduced, the efficiency of the generator can be improved, and the method becomes a favorable choice for realizing the efficient utilization of geothermal energy.
Referring to fig. 1, in a preferred embodiment, the high-temperature side heat exchanger unit includes a high-temperature water tank 100 and a first heat exchanger 110, which are sequentially and circularly connected; the low-temperature side heat exchanger unit comprises a low-temperature water tank 120 and a second heat exchanger 130, and the low-temperature water tank, the second heat exchanger and the condenser are sequentially and circularly connected. Preferably, the high-temperature side heat exchange unit and the low-temperature side heat exchange unit in the invention both comprise circulating pumps, the circulating pumps can be common hot water circulating pumps, and the high-temperature water temperature range in the high-temperature water tank is 90-100 ℃ and the water temperature range in the low-temperature water tank is 40-50 ℃ in the technical scheme of the invention.
Referring to fig. 1, in a preferred embodiment, the high temperature heat pump unit includes a first compressor 140 and a first throttle valve 150, which are sequentially and cyclically connected. In a preferred embodiment, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, and when the device specifically works, namely, after the water temperature in the high-temperature water tank and the low-temperature water tank reaches a preset range (40-50 ℃), the high-temperature heat pump unit is started, meanwhile, the organic working medium in the pipeline of the high-temperature heat pump unit is utilized to circularly exchange heat between the high-temperature side heat exchanger unit and the low-temperature side heat exchanger unit, the water in the high-temperature water tank is heated through the first heat exchanger (condenser), and meanwhile, the water in the low-temperature water tank is cooled through the second heat exchanger (evaporator), and the water in the high-temperature water tank is heated to a higher temperature range (90-100 ℃). In addition, the throttle valve and the one-way valve in the technical scheme of the invention can be combined into the one-way throttle valve in series, so that the one-way flow of working medium in a pipeline is controlled; in addition, the throttle valve can be matched with the overflow valve to form a throttle speed regulating system, so that the flow of working medium in the pipeline can be accurately controlled.
Referring to fig. 1, in a preferred embodiment, the generator is electrically connected to the first compressor. In the technical scheme of the invention, because the generated electric energy is less than the consumed electric energy, the electric energy generated by the geothermal generator is higher than the electric energy generated by the commercial power to supply power for the high-temperature heat pump unit, and the first compressor in the high-temperature heat pump unit is used for measuring the generated power and the total generated power of the generator, so that the purpose of testing the efficiency of the generator is achieved, and the purpose that the system only needs to provide partial electric energy for the high-temperature heat pump unit during operation is also achieved, and the energy saving effect is achieved.
Referring to fig. 1, in a preferred embodiment, the air-cooled heat pump assembly includes a second compressor 160, a plate heat exchanger 170, a second throttle valve 180 and an air-cooled heat exchanger 190, which are connected in series and circularly, and the plate heat exchanger is connected to the low-temperature water tank. The air-cooled heat pump unit in the technical scheme is equivalent to an air source heat pump unit, the air source heat pump is characterized in that low-temperature heat in air can be absorbed through an evaporator, the air source heat pump is gasified through an organic/inorganic medium, compressed by a compressor, pressurized and heated, and then converted into water by a condenser to heat, the compressed high-temperature heat energy is used for heating water temperature, the air-cooled heat pump unit has the characteristics of high efficiency and energy conservation, the same hot water quantity is manufactured, the energy conservation efficiency is 4-6 times that of a common electric water heater, the annual average heating efficiency ratio is 4 times that of electric heating, and the energy utilization efficiency is high. Therefore, compared with the technical schemes such as electric heating or gas heating, the geothermal power generation test system adopting the technical scheme of the invention can save more energy sources and greatly promote the development of geothermal power generation technology.
The invention discloses a geothermal power generation test system which mainly comprises an air-cooled heat pump unit, a low-temperature side heat exchange unit, a high-temperature heat pump unit and a generator unit. The geothermal power generation test system adopts a self-circulation operation mode, so that 100 tons of hot water with the flow rate per hour and the temperature of 95 ℃ can be used for simulating the test of a medium-low temperature geothermal power generator, and only partial electric energy is provided for a wind cold heat pump unit and a circulating pump and partial electric energy is provided for the high-temperature heat pump unit when the system is operated, the generated energy of the geothermal power generator is directly provided for the high-temperature heat pump unit for use, and the power generation power and the total power generation amount of the generator are measured through a first compressor in the high-temperature heat pump unit. The geothermal power generation test system has the advantages of compact structure, small occupied area, no interference of external natural environment and climate, stable operation, easy operation, electric energy saving, capability of testing the power generation efficiency and the power of the geothermal power generator in real time, and wide application scene.
In addition, referring to fig. 3, the invention also provides an operation method of the geothermal power generation test system, which comprises the following steps:
s100, starting an air-cooled heat pump unit, wherein the air-cooled heat pump unit is in a heat pump mode, the heat pump mode is that a plate heat exchanger is a condenser, the air-cooled heat exchanger is an evaporator, and water in a high-temperature water tank and a low-temperature water tank is heated to 40-50 ℃ by using the plate heat exchanger;
s200, after the water temperature in the high-temperature water tank and the low-temperature water tank reaches 40-50 ℃, starting a high-temperature heat pump unit, and simultaneously, circularly exchanging heat between the high-temperature side heat exchanger unit and the low-temperature side heat exchanger unit by utilizing an organic working medium in a pipeline of the high-temperature heat pump unit to heat the water in the high-temperature water tank to 90-100 ℃;
s300, after the temperature of water in the high-temperature water tank reaches 90-100 ℃, closing the air-cooled heat pump unit, taking the high-temperature side heat exchange unit as a heat source of a generator, taking the low-temperature side heat exchange unit as a cold source of the generator, and driving the generator to generate electricity by utilizing the temperature difference and the pressure difference at two sides of an air inlet and an air outlet of the generator.
In a preferred embodiment, the method of operating a geothermal power generation test system further comprises the steps of:
s400, when the temperature in the low-temperature water tank is higher than 50 ℃, the air-cooled heat pump unit starts a refrigeration mode, wherein the refrigeration mode is that the plate heat exchanger is an evaporator, the air-cooled heat exchanger is a condenser, and the temperature of water in the low-temperature water tank is maintained at 40-50 ℃ through heat dissipation of water in the low-temperature side heat exchanger unit water tank by the plate heat exchanger.
In a preferred embodiment, the method of operating a geothermal power generation test system further comprises the steps of:
s500, after the generator generates electricity, the high-temperature heat pump unit is driven to operate by combining the electric energy generated by the generator with commercial power, and the power generation power and the total power generation amount of the generator are measured by a first compressor in the high-temperature heat pump unit.
In the geothermal power generation test system, tail water from a generator is heated to 90-100 ℃ (preferably 95 ℃) again by a high-temperature heat pump technology at the high temperature side, and a heat source of the geothermal power generation test system is from a low-temperature side heat exchange unit. At the low temperature side, part of heat of condensed water discharged from the generator is used for heating tail water discharged from the generator at the high temperature side by a high temperature heat pump technology, and the other part of heat is cooled and radiated by an air cooling heat pump unit to maintain the constant temperature of 40-50 ℃ (preferably 45 ℃) in the low temperature side heat exchange unit, so that the temperature can be more stable, and continuous and stable power generation of the generator unit can be completely realized.
In summary, the invention provides a geothermal power generation test system and an operation method thereof, wherein the system comprises a generator set, a high-temperature side heat exchanger set connected with a evaporation end of the generator set, a low-temperature side heat exchanger set connected with a condensation end of the generator set, a high-temperature heat pump set connected with the high-temperature side heat exchanger set and the low-temperature side heat exchanger set, and an air-cooled heat pump set connected with the low-temperature side heat exchanger set. According to the geothermal power generation test system, the air-cooled heat pump unit is utilized to absorb heat in the air to heat the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, and compared with a heating mode of electric heating or gas heating and the like, the energy loss is greatly reduced; in addition, when the generator adopts the magnetic suspension generator set, the magnetic suspension generator greatly reduces mechanical loss, improves the generating efficiency of the generator, saves electric energy and reduces the test cost.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (5)
1. The geothermal power generation test system is characterized by comprising a generator set, a high-temperature side heat exchange unit connected with the evaporation end of the generator set, a low-temperature side heat exchange unit connected with the condensation end of the generator set, a high-temperature heat pump unit connected with the high-temperature side heat exchange unit and the low-temperature side heat exchange unit, and an air-cooled heat pump unit connected with the low-temperature side heat exchange unit;
the generator set comprises a working medium pump, an evaporator, a generator and a condenser which are sequentially and circularly connected;
the high-temperature side heat exchange unit comprises a high-temperature water tank and a first heat exchanger, wherein the high-temperature water tank, the first heat exchanger and the evaporator are sequentially and circularly connected; the low-temperature side heat exchange unit comprises a low-temperature water tank and a second heat exchanger, and the low-temperature water tank, the second heat exchanger and the condenser are sequentially and circularly connected;
the high-temperature heat pump unit comprises a first compressor and a first throttle valve, and the first compressor, the first heat exchanger, the first throttle valve and the second heat exchanger are sequentially and circularly connected;
the generator is electrically connected with the first compressor;
the air-cooled heat pump unit comprises a second compressor, a plate heat exchanger, a second throttle valve and an air-cooled heat exchanger which are sequentially and circularly connected, and the plate heat exchanger is connected with the low-temperature water tank.
2. The geothermal power generation test system of claim 1, wherein the generator is a magnetic levitation generator.
3. A method of operating a geothermal power generation test system according to any one of claims 1-2 comprising the steps of:
starting an air-cooled heat pump unit, wherein the air-cooled heat pump unit is in a heat pump mode, the heat pump mode is that a plate heat exchanger is a condenser, the air-cooled heat exchanger is an evaporator, and water in a high-temperature water tank and a low-temperature water tank is heated to 40-50 ℃ by using the plate heat exchanger;
after the water temperature in the high-temperature water tank and the low-temperature water tank reaches 40-50 ℃, starting a high-temperature heat pump unit, and simultaneously, circularly exchanging heat between the high-temperature side heat exchanger unit and the low-temperature side heat exchanger unit by utilizing an organic working medium in a pipeline of the high-temperature heat pump unit to heat the water in the high-temperature water tank to 90-100 ℃;
after the temperature of water in the high-temperature water tank reaches 90-100 ℃, the air-cooled heat pump unit is closed, the high-temperature side heat exchange unit is used as a heat source of the generator, the low-temperature side heat exchange unit is used as a cold source of the generator, and the temperature difference and the pressure difference at two sides of the air inlet and the air outlet of the generator are used for driving the generator to generate electricity.
4. A method of operating a geothermal power generation test system according to claim 3, further comprising the steps of:
when the temperature in the low-temperature water tank is higher than 50 ℃, the air-cooled heat pump unit starts a refrigeration mode, the refrigeration mode is that the plate heat exchanger is an evaporator, the air-cooled heat exchanger is a condenser, and the temperature of water in the low-temperature water tank is maintained at 40-50 ℃ through heat dissipation of water in the low-temperature side heat exchanger unit water tank by the plate heat exchanger.
5. The method of operating a geothermal power generation test system of claim 4, further comprising the steps of:
after the generator generates electricity, the high-temperature heat pump unit is driven to operate by combining the electric energy generated by the generator with commercial power, and the power generation power and the total power generation amount of the generator are measured by a first compressor in the high-temperature heat pump unit.
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