A household type heat, electricity and gas combined supply system based on renewable energy

Abstract

The application discloses a household type heat, electricity and gas combined supply system based on renewable energy, which comprises a wind power generation system, a solar power generation system, a solar water heating system, a biogas system and a heat pump circulation system; the biogas system comprises a biogas tank, a biogas storage tank and a combustion furnace which are connected in sequence, the combustion furnace is connected with a heating pipeline in a room, and the biogas storage tank is connected with a biogas pipeline in the room; the solar water heating system is connected with the heating pipeline and a hot water pipeline in the room; the wind power generation system and the solar power generation system are both connected with a storage battery, and the storage battery is connected with an electric appliance circuit in the room; the wind power generation system is connected with an input end of the heat pump circulation system, and a heat exchange end of the heat pump circulation system is connected with the heating pipeline. The application solves the problems of heating and power supply in the northern region of Shaanxi, and saves energy cost.

Description

Technical Field

[0001] This invention belongs to the field of renewable energy utilization and relates to a residential combined heat and power system based on renewable energy. Background Technology

[0002] With the development of the times, people have higher requirements for the comfort of life. In cities, people generally use centralized heating and power grid distribution. However, in rural Shaanxi, there are large areas of cave dwellings. Due to factors such as geographical location, economic development, and environmental constraints, heating is still provided by burning straw and branches, resulting in poor heating capacity, direct environmental pollution, and the production of large amounts of gases that are harmful to human health.

[0003] In terms of power supply, the mountainous terrain and rugged roads in northern Shaanxi make laying power lines difficult. Furthermore, the dispersed population results in extremely high grid maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a household combined heat, power and electricity system based on renewable energy, which solves the current difficulties in heating and power supply in northern Shaanxi and saves energy costs.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A residential combined heat, power, and electricity system based on renewable energy includes a wind power generation system, a solar power generation system, a solar water heating system, a biogas system, and a heat pump cycle system;

[0007] The biogas system includes a biogas digester, a biogas storage tank, and a combustion furnace connected in sequence. The combustion furnace is connected to the indoor heating pipes, and the output end of the biogas storage tank is connected to the indoor biogas pipes. The output end of the solar water heating system is connected to the heating pipes and the indoor hot water pipes. The output ends of the wind power generation system and the solar power generation system are both connected to batteries, and the battery output ends are connected to the indoor electrical wiring. The output end of the wind power generation system is connected to the input end of the heat pump circulation system, and the heat exchange end of the heat pump circulation system is connected to the heating pipes.

[0008] Preferably, the heat pump cycle system includes a first compressor, a second compressor, an air tank, a refrigerant storage chamber, an air heat exchanger, a control valve, and a heat exchanger; the input end of the first compressor is connected to the wind power generation system, the output end of the first compressor is connected to the input end of the air tank, the second compressor, the heat exchanger, the control valve, the refrigerant storage chamber, and the air heat exchanger are connected in sequence, the output end of the air heat exchanger is connected to the input end of the air tank to form a loop, and the input end of the air tank is connected to the output end of the compressor.

[0009] Furthermore, the wind power generation system includes a wind turbine, a geared converter, and a generator connected in sequence. When the heat pump cycle system is required, the geared converter is connected to the input end of the first compressor. When the heat pump cycle system is not required, the geared converter is disconnected from the input end of the first compressor.

[0010] Preferably, the solar water heating system includes a hot water storage tank, and the output end of the hot water storage tank is connected to the input end of the biogas storage tank.

[0011] Furthermore, the output end of the hot water storage tank is connected to the input end of the biogas storage tank via a valve.

[0012] Furthermore, an electric heating device is installed inside the hot water storage tank, and the output terminal of the battery is connected to the input terminal of the electric heating device.

[0013] Furthermore, the battery is connected to an electric heating device via a switch.

[0014] Preferably, the storage battery is a lithium polymer battery.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention utilizes a biogas system to generate biogas from the vast amount of agricultural waste in rural areas, which is then burned for heating. This effectively utilizes biomass energy for heating. It combines wind turbines and solar panels, with batteries storing electrical energy, increasing energy acquisition methods and avoiding power shortages when the output of a single generator is insufficient. Solar water heaters provide hot water to the house, and a heat pump circulation system further increases the temperature of the hot water. By using multiple renewable energy sources, it provides various energy supply methods to meet the diverse needs of residents.

[0017] The combined use of a heat pump cycle system and biomass energy for heating allows the heat pump cycle system to be replenished promptly when biomass energy is insufficient. This two-way coupling ensures continuous heating. When biomass energy is abundant, wind power is used for electricity generation and storage via a gear converter, avoiding energy waste.

[0018] Furthermore, some of the hot water in the hot water storage tank can be introduced into the biogas digester to increase the temperature of the biogas digester and effectively increase the biogas production.

[0019] Furthermore, by controlling the flow through valves, hot water is introduced into the biogas digester only when biogas production is low, such as when the outside temperature is low.

[0020] Furthermore, an electric heating element is added to the hot water storage tank to increase the water temperature.

[0021] Furthermore, by controlling the switch, heating is only applied when the water temperature is insufficient, effectively solving the problem of insufficient water temperature caused by insufficient sunlight in winter. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the gear changer structure of the present invention.

[0024] Wherein: 11-Wind turbine; 12-Gear converter; 13-First compressor; 14-Generator; 21-Gas storage tank; 22-Second compressor; 23-Air heat exchanger; 24-Refrigerant storage compartment; 25-Control valve; 26-Heat exchanger; 31-Biogas digester; 32-Biogas storage tank; 33-Combustion furnace; 41-Solar panel; 42-Battery; 43-Solar water heater; 44-Hot water storage tank; 51-Biogas pipeline; 52-Hot water pipeline; 53-Electrical wiring; 61-Valve; 62-Switch. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings:

[0026] like Figure 1 As shown, the residential combined heat, power, and electricity system based on renewable energy described in this invention includes a wind power generation system, a solar power generation system, a solar water heating system, a biogas system, and a heat pump cycle system.

[0027] The wind power generation system includes a wind turbine 11, a gearbox 12, and a generator 14 connected in sequence. The wind turbine 11 absorbs energy and transfers it to the generator 14 and the first compressor 13 via the gearbox 12. The generator 14 converts the energy into electrical energy, which is stored in a battery 42 (which can be a lithium polymer battery). The first compressor 13 compresses air, and the resulting high-pressure air is transported through pipelines and stored in an air storage tank 21. When wind energy is low and a heat pump cycle system is needed, the gearbox 12 is connected to the input of the first compressor 13; when wind energy is high and the heat pump cycle system is not needed, the gearbox 12 is disconnected from the input of the first compressor 13.

[0028] The heat pump cycle system includes a first compressor 13, a second compressor 22, an air tank 21, a refrigerant storage chamber 24, an air heat exchanger 23, a control valve 25, and a heat exchanger 26. The input end of the first compressor 13 is connected to the wind power generation system, and the output end of the first compressor 13 is connected to the input end of the air tank 21. The second compressor 22, the heat exchanger 26, the control valve 25, the refrigerant storage chamber 24, and the air heat exchanger 23 are connected in sequence, and the output end of the air heat exchanger 23 is connected to the input end of the second compressor 22 to form a loop. The medium input end of the gas receiver 21 is connected to the power output end of the compressor. The medium input end of the gas receiver 21 is also connected to the power output end of the second compressor 22. The medium output end of the gas receiver 21 is connected to the medium input end of the heat exchanger 26. The medium output end of the heat exchanger 26 is connected to the medium input end of the regulating valve 25. The medium input end of the regulating valve 25 is connected to the medium output end of the refrigerant storage chamber 24. The medium output end of the refrigerant storage chamber 24 is connected to the medium input end of the air heat exchanger 23. The medium output end of the air heat exchanger 23 is connected to the medium input end of the gas receiver 21. The high-pressure gas in the gas receiver 21 expands, generating energy that performs work on the second compressor 22 via a pipeline. The second compressor 22 compresses the refrigerant in the storage chamber into a high-temperature, high-pressure gas. The high-temperature, high-pressure refrigerant releases heat in the heat exchanger 26, reducing the refrigerant to a normal-temperature, high-pressure state. After passing through the regulating valve 25, the pressure of the normal-temperature, high-pressure refrigerant returns to normal, and its temperature decreases, reducing the refrigerant to a low-temperature, normal-pressure state. The refrigerant absorbs heat in the air heat exchanger 23, and is then stored at room temperature and pressure in the refrigerant storage chamber 24. The refrigerant in the refrigerant storage chamber 24 is compressed by the second compressor 22, becoming high temperature and high pressure. This constitutes a heat pump cycle system.

[0029] The solar water heating system includes a solar water heater 43 and a hot water storage tank 44. The output end of the hot water storage tank 44 is connected to the input end of the biogas storage tank 32, the heating pipe, and the indoor hot water pipe 52. The output end of the hot water storage tank 44 is connected to the input end of the biogas storage tank 32 through a valve 61.

[0030] The solar power generation system includes solar panels 41. Both the output ends of the wind power generation system and the output ends of the solar power generation system are connected to batteries 42. The output ends of the batteries 42 are connected to indoor electrical wiring 53, which provides power to the cave dwelling.

[0031] An electric heating device is installed inside the hot water storage tank 44, and the output terminal of the battery 42 is connected to the input terminal of the electric heating device via a switch 62. In winter, when sunlight is insufficient, the water in the hot water storage tank 44 can be electrically heated via a circuit to ensure a continuous supply of hot water.

[0032] The biogas system includes a biogas digester 31, a biogas storage tank 32, and a combustion furnace 33 connected in sequence. The combustion furnace 33 is connected to the indoor heating pipes, and the output end of the biogas storage tank 32 is connected to the indoor biogas pipeline 51. The biogas produced by the biogas digester 31 is stored in the storage tank 21 through pipelines. The biogas in the storage tank 21 generates a large amount of heat in the combustion furnace 33, which heats the water in the coils on the kang (heated brick bed) to provide heating for the cave dwelling. In particular, when the temperature is low in winter and the biogas production is insufficient, the solar water heater 43 heats the water tank and supplies hot water to the biogas digester 31 through pipelines to raise the temperature inside the biogas digester 31, thereby increasing the biogas production.

[0033] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A household type combined heat and power system based on renewable energy sources, characterized in that, The wind power generation system, the solar power generation system, the solar water heating system, the biogas system and the heat pump circulation system are included. The biogas system comprises a biogas tank (31), a biogas storage tank (32) and a combustion furnace (33) connected in sequence, the combustion furnace (33) is connected with a heating pipe in a room, and the output end of the biogas storage tank (32) is connected with a biogas pipe (51) in the room; the output end of the solar water heating system is connected with the heating pipe and a hot water pipe (52) in the room; the output ends of the wind power generation system and the solar power generation system are both connected with a storage battery (42), and the output end of the storage battery (42) is connected with an electric appliance line (53) in the room; the output end of the wind power generation system is connected with the input end of the heat pump circulation system, and the heat exchange end of the heat pump circulation system is connected with the heating pipe; The heat pump circulation system comprises a first compressor (13), a second compressor (22), a gas storage tank (21), a refrigerant storage bin (24), an air heat exchanger (23), a control valve (25) and a heat exchanger (26); the input end of the first compressor (13) is connected with the wind power generation system, the output end of the first compressor (13) is connected with the input end of the gas storage tank (21), the second compressor (22), the heat exchanger (26), the control valve (25), the refrigerant storage bin (24) and the air heat exchanger (23) are connected in sequence, the output end of the air heat exchanger (23) is connected with the input end of the gas storage tank (21) to form a loop, and the input end of the gas storage tank (21) is connected with the output end of the compressor; The wind power generation system comprises a wind turbine (11), a gear change (12) and a generator (14) connected in sequence, when the heat pump circulation system is needed to be used, the gear change (12) is connected with the input end of the first compressor (13), and when the heat pump circulation system is not needed to be used, the gear change (12) is disconnected with the input end of the first compressor (13); The solar water heating system comprises a hot water storage tank (44), and the output end of the hot water storage tank (44) is connected with the input end of the biogas storage tank (32).

2. The household-sized combined heat and power system based on renewable energy sources according to claim 1, characterized in that, The output end of the hot water storage tank (44) is connected with the input end of the biogas storage tank (32) through a valve (61).

3. The household-sized combined heat and power system based on renewable energy sources according to claim 1, characterized in that, An electric heating device is arranged in the hot water storage tank (44), and the output end of the storage battery (42) is connected with the input end of the electric heating device.

4. The household-sized combined heat and power system based on renewable energy sources according to claim 3, characterized in that, The storage battery (42) is connected with the electric heating device through a switch (62).

5. The household-sized combined heat and power system based on renewable energy sources according to claim 1, characterized in that, The storage battery (42) is a lithium polymer battery.

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