CN208184890U - The efficient system for geothermal production of electricity of ultralow temperature cold-storage dissolved based on wind-force, photovoltaic power generation - Google Patents

Abstract

The utility model discloses a kind of efficient system for geothermal production of electricity of ultralow temperature cold-storage dissolved based on wind-force, photovoltaic power generation, photovoltaic battery panel, wind-driven generator are connect with inversion system, the inversion system is connect by control system with refrigeration system, and the refrigeration system connects cold-storage device；The control system electric control valve；The cold-storage device cooling capacity output is divided into two-way: transmitting cooling capacity all the way to air conditioning system；Another way transmits cooling capacity to geothermal power generation module.The system carries out ultralow temperature cold-storage using discarded wind-force, photovoltaic power generation, and thus the cold source as the ultralow temperature of geothermal power generation, is significantly increased the efficiency of geothermal power generation.And the cold source can be simultaneously the building cooling supply in region.

Description

Ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation accommodation

technical field

The utility model relates to the field of cold storage heat energy utilization, in particular to an ultra-low temperature cold storage high-efficiency geothermal power generation system based on wind power and photovoltaic power generation.

Background technique

With the development of my country's renewable energy utilization technology, the proportion of renewable energy power generation is getting higher and higher. In 2017, the installed capacity of renewable energy power generation was 650 million kilowatts, and the power generation capacity was 1.7 trillion kilowatt-hours, accounting for 26.4% of the total power generation. The role of renewable energy in replacing traditional energy is more obvious, but at the same time, the phenomenon of "abandoning wind and solar" cannot be ignored. The annual abandonment rate of wind is 12%, and the rate of solar abandonment is 6%. Therefore, an appropriate wind power consumption method is necessary to include the wind power generation system.

Compared with the disadvantages of large fluctuations and intermittent nature of wind and solar power generation, geothermal power generation is a fairly stable form of renewable energy power generation. It can generate more than 8,000 hours of power generation throughout the year, excluding maintenance time. However, geothermal resources in most areas of my country belong to low-temperature regions, so conventional power generation methods have low power generation efficiency and thermodynamic cycle efficiency. Existing technologies, such as single-stage flash evaporation and duplex cycle based on organic Rankine cycle, mainly focus on improving the heat utilization of geothermal fluids, but still face the problem of low efficiency.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide an ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation.

In order to solve the technical problems proposed by the utility model, the technical solution adopted is: an ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation, including: photovoltaic panels, wind power generators, inverter systems, control systems, Refrigeration systems, cold storage devices, building air conditioning systems, valves;

Both the photovoltaic panels and the wind generator are connected to an inverter system, the inverter system is connected to a refrigeration system through a control system, and the refrigeration system is connected to a cold storage device; the control system electrically controls the valve;

The cooling capacity output of the cold storage device is divided into two routes: one route transmits the cooling capacity to the building air-conditioning system; the other route transmits the cooling capacity to the geothermal power generation module;

The cold storage device is connected to the building air conditioning system through a valve;

The geothermal power generation module is mainly composed of a condenser, a working fluid pump, a heater, a geothermal heat source, a two-phase expander, a generator and a mains grid. The condenser is connected to the working fluid pump, and the output end of the working fluid pump connected to the heater, the heat in the tube side of the heater is collected from a geothermal heat source, the output end of the shell side of the heater is connected to a two-phase expander, the two-phase expander is connected to a generator, and the working medium output of the two-phase expander is to said condenser;

The generator is connected to the mains grid.

The cold storage device provides the geothermal power generation module with an ultra-low temperature cold source lower than -50°C, and at the same time provides cooling for the building.

The control system is controlled by a single-chip microcomputer, which is selected from any model of 8051, MSP430 and DSP.

The control strategy of the control system is as follows:

① When it is in non-cooling working condition, the control system controls the output of electric energy to the refrigeration system, and the generated cold energy is stored in the cold storage device, and the control valve is closed at the same time;

② When it is in the cooling condition in summer, the control system controls the valve to open, the cold storage device provides cooling capacity for the building air conditioning system, and the refrigeration system continues to work.

Beneficial effect

1. This utility model proposes an ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation consumption. It combines wind power consumption and geothermal power generation, and stores the waste wind power generation through cold storage technology, which can improve renewable energy. The utilization rate of energy power generation can also use the stored cold energy to reduce the condensation temperature of the geothermal power generation system and improve the thermodynamic cycle efficiency.

2. The utility model uses an extra cold storage device to provide an ultra-low temperature cold source for condensing geothermal power generation system. This system improves the thermodynamic cycle efficiency by reducing the condensation temperature, and can obtain higher power generation efficiency under the working condition of using medium and low temperature geothermal heat sources.

3. In the geothermal power generation module of the present utility model, the circulating working medium completes heat exchange with the geothermal heat source in the heater, enters the two-phase expander to complete the expansion work and drives the generator to generate electric energy, and then the working medium enters the condenser and the cold storage device The low-temperature cold source completes the heat exchange and re-enters the heater under the action of the working fluid pump.

4. The utility model solves the problem of combined use of electricity and cooling in a comprehensive energy system including photovoltaic power generation and wind power generation, and also provides cooling, and provides a solution for reducing the phenomenon of abandoning wind and light and the impact of wind power generation on the grid. solution.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the principle of the utility model.

Reference signs: 1. Photovoltaic panel; 2. Wind generator; 3. Inverter system; 4. Control system; 5. Refrigeration system; 6. Cold storage device; 7. Building air conditioning system; 8. Valve; 9. Condensation 10. Working medium pump; 11. Heater; 12. Geothermal heat source; 13. Two-phase expander; 14. Generator; 15. Mains grid.

Detailed ways

In order to make the purpose and technical solution of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

The utility model is an ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation. Referring to FIG. System 5, cold storage device 6, building air conditioning system 7, valve 8;

Both the photovoltaic cell panel 1 and the wind generator 2 are connected to the inverter system 3, and the photovoltaic cell panel 1 and the wind generator 2 are connected to the refrigeration system 5 through the inverter system 3 and the control system 4, and the refrigeration system 5 is connected with cold storage device 6;

The control system 4 electrically controls the valve 8;

The cooling output of the cold storage device 6 is divided into two routes: one is connected to the building air conditioning system 7 through a valve 8, and the cold storage device 6 transmits cooling capacity to the building air conditioning system 7; the other is where the cold storage device 6 is connected to the condenser 9, the cold storage device 6 transmits cold energy to the geothermal power generation module;

The geothermal power generation module is mainly composed of a condenser 9, a working medium pump 10, a heater 11, a geothermal heat source 12, a two-phase expander 13, a generator 14 and a mains grid 15. The condenser 9 and the working medium pump 10 connection, the output end of the working fluid pump 10 is connected to the heater 11, the tube-side heat in the heater 11 is collected from the geothermal heat source 12, the shell-side output end of the heater 11 is connected to the two-phase expander 13, and the two-phase The expander 13 is connected to the generator 14, and the working medium of the two-phase expander 13 is output to the condenser 9;

In the geothermal power generation module, the circulating working medium completes heat exchange with the geothermal heat source 12 in the heater 11, enters the two-phase expander 13 to complete the expansion work and drives the generator 14 to generate electric energy, and then the working medium enters the condenser 9 and the cold storage device 6 The low-temperature cold source inside completes the heat exchange, and re-enters the heater 11 under the action of the working medium pump 10;

The generator 14 is connected to a commercial power grid 15 .

As shown in Figure 2, the utility model is converted into ultra-low temperature cold energy below -50°C by the refrigeration system through the inverter system and control system and stored in the cold storage device.

The cold energy stored in the cold storage device provides cold energy to the buildings in the system through the building air conditioning system.

In the geothermal power generation module, the circulating working medium completes heat exchange with the geothermal heat source 12 in the heater 11, enters the two-phase expander 13 to complete the expansion work and drives the generator 14 to generate electric energy, and then the working medium enters the condenser 9 and the cold storage device 6 The low-temperature cold source completes the heat exchange, and re-enters the heater 11 under the action of the working fluid pump 10 . The generated electric energy is incorporated into the commercial power grid 15 .

The utility model control system control strategy is as follows:

① When in non-cooling working condition, the control system 4 controls the output of electric energy to the refrigeration system 5, and the generated cold energy is stored in the cold storage device 6, and at the same time, the control valve 8 is closed;

② When it is in the cooling condition in summer, the control system 4 controls the valve 8 to open, the cold storage device 6 provides cooling capacity for the building air conditioning system 7, and the refrigeration system 5 continues to work.

The control system can be realized by programming through hardware such as 8051, MSP430 and DSP.

To sum up, the utility model proposes an ultra-low temperature cold storage and cooling system based on wind power and photovoltaic power generation, and a high-efficiency geothermal power generation system, which combines wind power consumption and geothermal power generation, and stores waste wind power through cold storage technology. It can not only improve the utilization rate of renewable energy power generation, but also use the stored cold energy to reduce the condensation temperature of the geothermal power generation system and improve the thermodynamic cycle efficiency. In the actual operation process, the fluctuation brought by wind power generation to the power grid is reduced, and at the same time, the cooling demand of the building is met.

The basic principles, main features and advantages of the present utility model have been shown and described above. For those skilled in the art, it is possible to make multiple modifications to the above exemplary embodiments without departing from the principle and spirit of the present utility model. changes, the scope of the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. An ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation, which is characterized in that it includes: photovoltaic panels (1), wind power generators (2), inverter systems (3), control systems (4), Refrigeration system (5), cold storage device (6), building air conditioning system (7), valve (8); The photovoltaic panels (1) and the wind generator (2) are all connected to an inverter system (3), and the inverter system (3) is connected to a refrigeration system (5) through a control system (4), and the refrigeration The system (5) is connected to the cold storage device (6); the control system (4) electrically controls the valve (8); The cooling capacity output of the cold storage device (6) is divided into two routes: one route transmits the cooling capacity to the building air conditioning system (7); the other route transmits the cooling capacity to the geothermal power generation module; The cold storage device (6) is connected to the building air conditioning system (7) through a valve (8); The geothermal power generation module mainly consists of a condenser (9), a working medium pump (10), a heater (11), a geothermal heat source (12), a two-phase expander (13), a generator (14) and a mains power grid ( 15) Composition, the condenser (9) is connected to the working medium pump (10), the output end of the working medium pump (10) is connected to the heater (11), and the tube-side heat in the heater (11) is collected in the A geothermal heat source (12), the shell side output end of the heater (11) is connected to a two-phase expander (13), the two-phase expander (13) is connected to a generator (14), and the two-phase expander (13) ) working fluid is output to the condenser (9); The generator (14) is connected to a commercial power grid (15). 2. The ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation according to claim 1, wherein the cold storage device provides the geothermal power generation module with an ultra-low temperature cold source lower than -50°C, and at the same time Cool the building. 3. The ultra-low temperature cold storage and high-efficiency geothermal power generation system based on wind power and photovoltaic power generation according to claim 1, wherein the control system is controlled by a single-chip microcomputer, selected from any model of 8051, MSP430 and DSP.