阅读说明：本技术 一种地热能分布式供能系统 (Geothermal energy distributed energy supply system ) 是由 李超 毕天骄 于 2021-01-21 设计创作，主要内容包括：本发明公开了一种地热能分布式供能系统,涉及地热能开发利用技术领域。所述地热能分布式供能系统,包括：地热能换热子系统、热泵子系统、有机朗肯循环发电子系统和喷射式制冷子系统；其中,所述地热能换热子系统通过发生器为有机朗肯循环发电子系统和喷射式制冷子系统提供热源,所述地热能换热子系统通过第一蒸发器为热泵子系统提供热源；所述有机朗肯循环发电子系统和喷射式制冷子系统通过共用发生器、第二冷凝器、有机工质循环泵耦合在一起。本发明,按照“温度对口,梯级利用”的原则,同时向外界提供电负荷、热负荷和冷负荷,有效的提高了系统的能源利用率,改善了系统的经济性。(The invention discloses a distributed geothermal energy supply system, and relates to the technical field of development and utilization of geothermal energy. The distributed geothermal energy supply system comprises: the system comprises a geothermal energy heat exchange subsystem, a heat pump subsystem, an organic Rankine cycle power generation subsystem and an injection type refrigeration subsystem; the geothermal energy heat exchange subsystem provides a heat source for the organic Rankine cycle power generation subsystem and the jet type refrigeration subsystem through the generator, and the geothermal energy heat exchange subsystem provides a heat source for the heat pump subsystem through the first evaporator; the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem are coupled together through a shared generator, a second condenser and an organic working medium circulating pump. According to the invention, the power load, the heat load and the cold load are simultaneously provided to the outside according to the principle of 'temperature to port and cascade utilization', the energy utilization rate of the system is effectively improved, and the economy of the system is improved.)

1. A distributed geothermal energy supply system, comprising: the system comprises a geothermal energy heat exchange subsystem, a heat pump subsystem, an organic Rankine cycle power generation subsystem and an injection type refrigeration subsystem; the geothermal energy heat exchange subsystem provides a heat source for the organic Rankine cycle power generation subsystem and the jet type refrigeration subsystem through the generator, and the geothermal energy heat exchange subsystem provides a heat source for the heat pump subsystem through the first evaporator; the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem are coupled together through a shared generator, a second condenser and an organic working medium circulating pump.

2. A distributed geothermal energy supply system according to claim 1,

the geothermal energy heat exchange subsystem comprises: the system comprises a hot water well, a circulating pump, a generator, a first evaporator and a water return well, wherein the hot water well, the circulating pump, the generator, the first evaporator and the water return well are sequentially connected through pipelines;

the heat pump subsystem includes: the system comprises a first evaporator, a compressor, a first condenser and a first throttling valve, wherein the first evaporator, the compressor, the first condenser and the first throttling valve are sequentially connected through pipelines and form a circulation loop;

the organic Rankine cycle power generation subsystem includes: the system comprises a generator, an expander, a generator, a second condenser and an organic working medium circulating pump, wherein the generator, the expander, the second condenser and the organic working medium circulating pump are sequentially connected through a pipeline to form a circulating loop; the generator is coaxially connected with the expansion machine;

the ejector refrigeration subsystem includes: the organic working medium circulating pump generator comprises a generator, an organic working medium circulating pump, an ejector, a second condenser, a second throttling valve and a second evaporator, wherein the generator, the ejector, the second condenser and the organic working medium circulating pump are sequentially connected through a pipeline and form a circulating loop, and the ejector, the second condenser, the second throttling valve and the second evaporator are sequentially connected through a pipeline and form a circulating loop.

3. The distributed geothermal energy supply system according to claim 1, wherein geothermal water flowing through the generator transfers heat of geothermal water to the organic working medium to serve as a heat source for the organic Rankine cycle power generation subsystem and the injection refrigeration subsystem.

4. The distributed geothermal energy supply system according to claim 1, wherein the geothermal water flowing through the first evaporator transfers its heat to the heat pump subsystem cycle fluid as a heat source of the heat pump subsystem.

5. The distributed geothermal energy supply system of claim 1, wherein the heat pump subsystem uses heat sources provided by the geothermal energy heat exchange subsystem to meet the heat load requirements of users.

6. The distributed geothermal energy supply system according to claim 1, wherein the organic Rankine cycle power generation subsystem can meet the electrical load demand of a user by using a heat source provided by the geothermal heat exchange subsystem.

7. The distributed geothermal energy supply system of claim 1, wherein the injection refrigeration subsystem uses a heat source provided by the geothermal heat exchange subsystem to meet the cooling load demand of the user.

Technical Field

The invention relates to the technical field of development and utilization of geothermal energy, in particular to a distributed geothermal energy supply system.

Background

The development and utilization of energy are closely related to the development level of the productivity of the human society, and therefore, the energy structure can measure the development level of the productivity of the human society. From the analysis of energy development and utilization, the utilization of energy by human beings is from the initial firewood to the later fossil energy such as coal, petroleum and natural gas, and then to the use of clean energy such as water energy, wind energy and solar energy, and each change of energy structure promotes the leap of productivity and the improvement of human civilization.

Compared with fossil energy, geothermal energy has the characteristics of large quantity, renewability, environmental friendliness and the like. China has abundant geothermal energy resources, and has abundant high-temperature geothermal resources for geothermal power generation in Tibet, Yunnan West, Sichuan and other areas. The geothermal energy power generation is an energy conversion process which converts geothermal energy into mechanical energy and then converts the mechanical energy into electric energy by using underground high-temperature hot water and steam as heat sources.

At present, the utilization of geothermal energy in China is mainly realized by using a heat source for power generation, the energy utilization rate is low, and the system economy is poor. How to solve the technical problems is a technical problem to be solved in the technical field of geothermal energy development and utilization at present.

Disclosure of Invention

In view of the above technical problems, embodiments of the present invention provide a distributed geothermal energy supply system to solve the problems in the background art.

The invention provides the following technical scheme: a distributed geothermal energy supply system comprising: the system comprises a geothermal energy heat exchange subsystem, a heat pump subsystem, an organic Rankine cycle power generation subsystem and an injection type refrigeration subsystem; the geothermal energy heat exchange subsystem provides a heat source for the organic Rankine cycle power generation subsystem and the jet type refrigeration subsystem through the generator, and the geothermal energy heat exchange subsystem provides a heat source for the heat pump subsystem through the first evaporator; the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem are coupled together through a shared generator, a second condenser and an organic working medium circulating pump.

Preferably, the geothermal energy heat exchange subsystem comprises: the system comprises a hot water well, a circulating pump, a generator, a first evaporator and a water return well, wherein the hot water well, the circulating pump, the generator, the first evaporator and the water return well are sequentially connected through pipelines;

the heat pump subsystem includes: the system comprises a first evaporator, a compressor, a first condenser and a first throttling valve, wherein the first evaporator, the compressor, the first condenser and the first throttling valve are sequentially connected through pipelines and form a circulation loop;

the organic Rankine cycle power generation subsystem includes: the system comprises a generator, an expander, a generator, a second condenser and an organic working medium circulating pump, wherein the generator, the expander, the second condenser and the organic working medium circulating pump are sequentially connected through a pipeline to form a circulating loop; the generator is coaxially connected with the expansion machine;

the ejector refrigeration subsystem includes: the organic working medium circulating pump generator comprises a generator, an organic working medium circulating pump, an ejector, a second condenser, a second throttling valve and a second evaporator, wherein the generator, the ejector, the second condenser and the organic working medium circulating pump are sequentially connected through a pipeline and form a circulating loop, and the ejector, the second condenser, the second throttling valve and the second evaporator are sequentially connected through a pipeline and form a circulating loop.

Preferably, geothermal water flowing through the generator transfers the heat of the geothermal water to the organic working medium to be used as a heat source of the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem.

Preferably, geothermal water flowing through the first evaporator transfers the heat of the geothermal water to a circulating working medium of the heat pump subsystem to serve as a heat source of the heat pump subsystem.

Preferably, the heat pump subsystem utilizes a heat source provided by the geothermal energy heat exchange subsystem, and can meet the heat load demand of a user.

Preferably, the organic Rankine cycle power generation subsystem utilizes a heat source provided by the geothermal energy heat exchange subsystem, and can meet the electric load demand of users.

Preferably, the jet refrigeration subsystem utilizes a heat source provided by the geothermal energy heat exchange subsystem, and can meet the cold load demand of a user.

The geothermal energy distributed energy supply system provided by the embodiment of the invention has the following beneficial effects:

1. according to the invention, the power load, the heat load and the cold load are provided to the outside simultaneously according to the principle of 'temperature alignment and cascade utilization', so that the energy utilization rate of the system is effectively improved, and the economy of the system is improved;

2. the geothermal energy is used as a heat source, and the power generation is carried out through the organic Rankine cycle, so that the utilization of the geothermal energy is realized, the consumption of fossil energy is reduced, and the emission of pollutants is reduced;

3. in the geothermal energy distributed energy supply system provided by the invention, the organic Rankine cycle power generation system and the jet type refrigeration system share equipment such as a generator, a condenser, a working medium circulating pump and the like, so that the complexity of the system is reduced, and the system investment is reduced;

4. the heat pump technology is utilized to convert the low-grade geothermal energy after heat exchange into medium-grade geothermal energy, so that the external heat load requirement is met;

5. compared with a centralized power generation system, the distributed energy power generation system is generally arranged near users, so that the energy transmission distance can be shortened, the loss is reduced, and the total efficiency of the system is improved.

Drawings

FIG. 1 is a schematic structural diagram of a distributed geothermal energy supply system according to the present invention;

in the figure: 1. the system comprises a hot water well, 2 parts of a circulating pump, 3 parts of a generator, 4 parts of a first evaporator, 5 parts of a water return well, 6 parts of a compressor, 7 parts of a first condenser, 8 parts of a first throttle valve, 9 parts of an expander, 10 parts of a generator, 11 parts of an organic working medium circulating pump, 12 parts of an ejector, 13 parts of a second condenser, 14 parts of a second throttle valve and 15 parts of a second evaporator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a geothermal energy distributed power supply system according to the present invention.

In view of the above mentioned problems in the background art, an embodiment of the present invention provides a distributed geothermal energy supply system, so as to solve the above technical problems, and the technical solution is as follows:

a distributed geothermal energy supply system comprising: the system comprises a geothermal energy heat exchange subsystem, a heat pump subsystem, an organic Rankine cycle power generation subsystem and an injection type refrigeration subsystem; the geothermal energy heat exchange subsystem provides a heat source for the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem by sharing the generator 3 with the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem, and provides a heat source for the geothermal energy heat exchange subsystem by sharing the first evaporator 4 with the heat pump subsystem; the organic Rankine cycle power generation subsystem and the injection type refrigeration subsystem are coupled together through the shared generator 3, the second condenser 13 and the organic working medium circulating pump 11.

Preferably, the geothermal energy heat exchange subsystem comprises: the system comprises a hot water well 1, a circulating pump 2, a generator 3, a first evaporator 4 and a water return well 5, wherein the hot water well 1, the circulating pump 2, the generator 3, the first evaporator 4 and the water return well 5 are sequentially connected through pipelines; wherein, the circulating pump 2 provides power for geothermal water circulation;

the heat pump subsystem includes: the system comprises a first evaporator 4, a compressor 6, a first condenser 7 and a first throttling valve 8, wherein the first evaporator 4, the compressor 6, the first condenser 7 and the first throttling valve 8 are sequentially connected through pipelines and form a circulation loop; the compressor 6 is used for compressing the circulating working medium of the heat pump subsystem; the first condenser 7 provides heat for the outside and meets the requirement of the outside heat load; the pressure of the circulating working medium of the heat pump subsystem is reduced through the first throttle valve 8;

the organic Rankine cycle power generation subsystem includes: the system comprises a generator 3, an expander 9, a generator 10, a second condenser 13 and an organic working medium circulating pump 11, wherein the generator 3, the expander 9, the second condenser 13 and the organic working medium circulating pump 11 are sequentially connected through pipelines and form a circulating loop; the generator 10 is coaxially connected with the expander 9;

wherein, the expander 9 expands the organic working medium in the expander to do work; the generator 10 is driven by the expander 9 to generate electricity; the second condenser 13 is used for condensing the organic working medium at the outlet of the expansion machine 9 into a liquid state; the organic working medium circulating pump 11 is used for providing power for the circulation of the organic working medium;

the ejector refrigeration subsystem includes: the system comprises a generator 3, an organic working medium circulating pump 11, an ejector 12, a second condenser 13, a second throttling valve 14 and a second evaporator 15, wherein the generator 3, the ejector 12, the second condenser 13 and the organic working medium circulating pump 11 are sequentially connected through a pipeline and form a circulating loop, and the ejector 12, the second condenser 13, the second throttling valve 14 and the second evaporator 15 are sequentially connected through a pipeline and form a circulating loop;

wherein, the organic working medium circulating pump 11 provides power for the circulation of the organic working medium; the ejector 12 mixes the high-pressure circulating working medium and the low-pressure refrigerating working medium to form a high-pressure refrigerating working medium; the second condenser 13, the high-pressure refrigeration working medium releases heat and condenses to the environment; a second throttle valve 14 through which the liquid refrigerant working fluid flows for pressure reduction; in the second evaporator 15, the liquid refrigerant absorbs heat and gasifies in the evaporator, and the external cold load is met.

In the invention, the geothermal energy heat exchange subsystem is connected with the organic rankine cycle power generation subsystem and the injection type refrigeration subsystem shared generator 3, and the geothermal energy heat exchange subsystem is connected with the heat pump subsystem shared first evaporator 4.

In the use process, the generator 3 uses geothermal water as the working medium on one side and organic working medium on the other side, and the geothermal water is used for providing a heat source for the organic Rankine cycle power generation subsystem and the jet type refrigeration subsystem; and in the first evaporator 4, the working medium on one side is geothermal water, the working medium on one side is a circulating working medium in the heat pump subsystem, and the geothermal water is used for providing a heat source for the heat pump subsystem. By sharing the equipment, the complexity of the system is reduced, and the system investment is reduced.

The application principle of the geothermal energy distributed energy supply system is as follows:

1. in the geothermal energy heat exchange subsystem, geothermal water flows out of a hot water well 1 under the drive of a circulating pump 2, sequentially flows through a generator 3 and a first evaporator 4, and flows back to a return water well 5 after being heated; in the generator 3, geothermal water transfers heat to an organic working medium to be used as a heat source of an organic Rankine cycle power generation subsystem and an injection type refrigeration subsystem; in the first evaporator 4, geothermal water transfers heat to a heat pump subsystem circulating working medium to be used as a heat source of the heat pump subsystem;

2. in the heat pump subsystem, a first evaporator 4, a compressor 6, a first condenser 7 and a first throttle valve 8 are sequentially connected to form a loop; the circulating working medium of the liquid heat pump subsystem absorbs the heat released by the geothermal water in the first evaporator 4 and is evaporated into a gas state; the generated gaseous circulating working medium enters a compressor 6 to be pressurized and heated, and high-temperature and high-pressure circulating working medium is obtained; the high-temperature high-pressure circulating working medium enters a first condenser 7 for condensation and heat release, and heat is transferred to a heat user to meet the external heat load requirement; the condensed circulating working medium is throttled and depressurized by a first throttle valve 8 and then returns to the first evaporator 4 for the next cycle;

3. in the organic Rankine cycle power generation subsystem, a generator 3, an expander 9, a second condenser 13 and an organic working medium circulating pump 11 are sequentially connected to form a loop; the generator 10 is coaxially connected with the expander 9; the working medium of the organic Rankine cycle power generation system is an organic working medium; the liquid organic working medium absorbs heat and is gasified in the generator 3 to reach a saturated state; then, the power enters an expansion machine 9 for expansion and work, the expansion machine 9 is pushed to drive a generator 10 to output electric energy to the outside, and the external electric load requirement is met; the organic working medium after acting enters a second condenser 13 for heat release and condensation; the condensed organic working medium is pressurized by an organic working medium circulating pump 11 and then enters the generator 3 again for next circulation;

4. in the injection type refrigeration subsystem, the working medium of the injection type refrigeration subsystem is the same as that of the organic Rankine cycle power generation subsystem and is also an organic working medium; the high-temperature high-pressure organic working medium flowing out of the generator 3 is divided into two parts, one part enters the expander 9, the other part enters the ejector 12 and is sprayed out at supersonic speed after passing through a convergent-divergent nozzle, a low-pressure area is generated near the nozzle, so that the low-pressure organic working medium in the second evaporator 15 is sucked into the ejector 12, and the two parts of working medium are mixed to form medium-pressure organic working medium; the formed medium-pressure organic working medium is mixed with the organic working medium at the outlet of the expander 9 and then enters the second condenser 13 for heat release and condensation; the condensed organic working medium is divided into two parts, one part is boosted by the working medium circulating pump 11 and then enters the generator 3 for heat absorption and gasification; and a part of the air enters the second evaporator 15 after being depressurized by the throttle valve 14 to absorb heat and gasify, and the air meets the external cold load.

The geothermal energy distributed energy supply system provided by the embodiment of the invention has the following beneficial effects: according to the invention, the power load, the heat load and the cold load are provided to the outside simultaneously according to the principle of 'temperature alignment and cascade utilization', so that the energy utilization rate of the system is effectively improved, and the economy of the system is improved; the geothermal energy is used as a heat source, and the power generation is carried out through the organic Rankine cycle, so that the utilization of the geothermal energy is realized, the consumption of fossil energy is reduced, and the emission of pollutants is reduced; in the geothermal energy distributed energy supply system provided by the invention, the organic Rankine cycle power generation system and the jet type refrigeration system share equipment such as a generator, a condenser, a working medium circulating pump and the like, so that the complexity of the system is reduced, and the system investment is reduced; the heat pump technology is utilized to convert the low-grade geothermal energy after heat exchange into medium-grade geothermal energy, so that the external heat load requirement is met; compared with a centralized power generation system, the distributed energy power generation system is generally arranged near users, so that the energy transmission distance can be shortened, the loss is reduced, and the total efficiency of the system is improved.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

It should be understood that the technical solutions and concepts of the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.