Distributed multi-energy complementary heat supply method and system for enhancing heat supply safety and toughness

Abstract

The invention relates to the technical field of urban heat supply, in particular to a distributed multi-energy complementary heat supply method and system for enhancing heat supply safety and toughness, and solves the problems that the dependence of heat supply on specific energy is easily enhanced, the supply risk is increased, the supply quantity is influenced by energy raw materials, and the heat supply safety and toughness are improved in the existing coal and natural gas supply mode for enhancing heat supply. The system comprises a plurality of photovoltaic power generation heating base stations, the photovoltaic power generation heating base stations are electrically connected with a regional power supply line, the regional power supply line is electrically connected with a ground source heat pump and an air source heat pump, and the ground source heat pump and the air source heat pump are each provided with a conveying pipeline. According to the system, full utilization, cross-seasonal utilization and heat storage peak regulation of photovoltaic photo-thermal energy are achieved, full utilization of renewable energy sources is achieved through reasonable allocation of resources, the heat supply energy cost is reduced, and meanwhile the safety, stability and toughness of a regional heat supply system are greatly improved through distributed multi-energy complementation.

Description

Technical Field

[0001] The present invention relates to the field of urban heating technology, and in particular to a distributed multi-energy complementary heating method and system for enhancing heating safety and resilience. Background Art

[0002] The urban heating system consists of three parts: heat source, heat network and heat users. The urban heating system is a heating network that uses centralized heat sources to supply heat energy for production or life to heat energy users through facilities such as heating pipe networks. The types of heat sources for urban heating in my country include thermal power plants, centralized boiler rooms, decentralized boiler rooms, industrial waste heat, nuclear energy, geothermal energy, solar energy, heat pumps, household electric heaters and small coal (oil, gas) stoves. Significant progress has been made in the field of heating, but it still faces severe challenges in terms of energy structure, mainly manifested in: the energy supply is greatly uncertain due to the significant fluctuations in the international natural gas and crude oil markets and the impact of climate; the proportion of fossil energy is relatively high, and the promotion and application of new technologies for renewable energy is insufficient.

[0003] The existing method of strengthening the supply of coal and natural gas for heating is likely to lead to an increased dependence on specific energy sources for heating, increased supply risks, and the supply volume is affected by energy raw materials, making it impossible to achieve distributed synchronous energy supply; therefore, it does not meet existing needs. In this regard, we propose a distributed multi-energy complementary heating method and system that enhances the safety and resilience of heating. Summary of the invention

[0004] The purpose of the present invention is to provide a distributed multi-energy complementary heating method and system with enhanced heating safety and resilience, so as to solve the problem proposed in the above background technology that the existing way of strengthening the supply of coal and natural gas for heating is likely to lead to increased dependence on specific energy sources for heating, increased supply risks, and the supply volume is affected by energy raw materials, making it impossible to achieve distributed synchronous energy supply.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a distributed multi-energy complementary heating system with enhanced heating safety resilience, comprising a plurality of photovoltaic power generation and heating base stations, the photovoltaic power generation and heating base stations are electrically connected to a regional power supply line, the regional power supply line is electrically connected to a ground source heat pump and an air source heat pump, the ground source heat pump and the air source heat pump are both provided with a transmission pipeline, the ground source heat pump and the air source heat pump are both connected to an underground pipe assembly through a transmission pipeline, the photovoltaic power generation and heating base station is connected to the underground pipe assembly through a transmission pipeline, a regional heating line is installed at the output end of the ground source heat pump and the air source heat pump, a phase change heat storage device is installed between the air source heat pump and the regional heating line, and a plurality of fan coil units and radiators are installed at the output end of the regional heating line;

[0006] The regional power supply line is electrically connected to a municipal power grid and a plurality of user power terminals, and the regional heating line is connected to a municipal heating terminal via a transmission pipeline.

[0007] Preferably, the ground source heat pump delivers cold water to the fan coil unit through the regional heating line when it is in a powered-on cooling state, and the fan coil unit generates a cold air flow when it is in operation.

[0008] Preferably, the ground source heat pump delivers hot water to the fan coil unit and the radiator through a delivery pipeline when it is powered on, and a hot air flow is generated when the fan coil unit and the radiator are in operation.

[0009] Preferably, the input end of the regional power supply line is connected to the municipal power grid and multiple photovoltaic power generation base stations, the output end of the regional power supply line is connected to the ground source heat pump, the air source heat pump and multiple user power terminals, the input end of the regional heating line is connected to the ground source heat pump, the air source heat pump, the phase change heat storage equipment and the municipal heating terminal, and the output end of the regional heating line is connected to multiple fan coil units and radiators.

[0010] Preferably, the municipal power grid is a power plant, and the municipal heating end is a heating station.

[0011] Preferably, the photovoltaic power generation and heating base station includes a centralized storage box, a plurality of photovoltaic power generation and heating components are fixedly installed on one side of the centralized storage box, the photovoltaic power generation and heating components are composed of a PV / T collector plate and a photovoltaic support frame, the PV / T collector plate is fixedly connected to the upper end of the photovoltaic support frame, a collecting plate is fixedly installed in the middle of the lower end surface of the PV / T collector plate, a drain pipe is installed in the middle of the collecting plate, an inlet pipe is installed at the upper end of the collecting plate, a heating area and a cooling area are provided on the inner side of the centralized storage box, a cold water delivery main pipe is installed on the inner side of the heating area, a hot water temporary storage tank is installed below the cold water delivery main pipe, and a hot water delivery main pipe is installed on the lower end surface of the hot water temporary storage tank.

[0012] Preferably, the hot water delivery main pipe and the hot water temporary storage tank are both arranged on the inner side of the heating area, the cold water delivery main pipe, the hot water delivery main pipe and the hot water temporary storage tank are all fixedly connected to the centralized storage tank, the output ends of the multiple collecting plates are connected to the hot water temporary storage tank through multiple drainage pipes, the input ends of the multiple collecting plates are connected to the cold water delivery main pipe through multiple water inlet pipes, solenoid valves are provided on the inner sides of the drainage pipes and the water inlet pipes, and the cold water delivery main pipe and the hot water delivery main pipe are connected to the buried pipe assembly.

[0013] Preferably, an electrical connection box is installed on the inner side of the cold transport area, a cooling fan box is fixedly installed on one end of the electrical connection box, a temporary power storage battery is fixedly installed on the other end of the electrical connection box, an electrical connection insulating cover plate is fixedly installed on the other side of the centralized storage box, a cable installation sleeve is fixedly installed on the upper end of the electrical connection insulating cover plate, and the temporary power storage battery is electrically connected to multiple PV / T collectors.

[0014] Preferably, a light detection seat is fixedly installed in the middle of the upper end surface of the centralized storage box, and the light detection seat is composed of a glass cover and a light intensity sensor. The power temporary storage battery is electrically connected to the light intensity sensor and the regional power supply line.

[0015] A heating method of a distributed multi-energy complementary heating system for enhancing heating safety resilience comprises the following steps:

[0016] S1: The distributed multi-energy complementary heating system is divided into a non-heating stage and a heating stage. In the non-heating stage, the heat energy generated by multiple photovoltaic power generation and heating base stations is transported to the underground pipe assembly through the transmission pipeline. At the same time, the electric energy generated by multiple photovoltaic power generation and heating base stations is transported to the ground source heat pump and the air source heat pump through the regional power supply line, so that the heat energy generated by the air source heat pump through the electric drive and the condensation heat energy generated by the ground source heat pump when running the cooling are both transported to the underground pipe assembly through the transmission pipeline for heat energy storage operation. When the ground source heat pump is cooling, it can output cold air to multiple fan coil units through the transmission pipeline and the regional heating line, which is convenient for full utilization. The condensation heat in the cooling process of the ground source heat pump in the non-heating stage is recovered, which not only effectively realizes the cross-seasonal utilization of energy, reduces the energy storage cost, but also improves the heating guarantee capability;

[0017] S2: When there is excess heat energy in the underground pipe assembly, the photovoltaic power generation base station can supply power to multiple users through the regional power supply line to avoid power loss. When the electricity generated by the photovoltaic power generation base station cannot meet the efficient operation of the ground source heat pump and the air source heat pump, the municipal power grid is used to supplement the electricity to avoid the lack of heat energy in the underground pipe assembly affecting the stable heating during the heating stage;

[0018] S3: In the heating stage, when the electric energy generated by the photovoltaic power generation heating base station is greater than the needs of the ground source heat pump and the air source heat pump, the photovoltaic power generation heating base station transmits the excess electric energy to the user's electricity end through the regional power supply line for full utilization. When the electric energy generated by the photovoltaic power generation heating base station is less than the needs of the ground source heat pump and the air source heat pump, the regional power supply line stops supplying power to the user's electricity end and supplements the electric energy through the municipal power grid. At this time, the ground source heat pump extracts the heat energy stored inside the buried pipe assembly through the power supply of the regional power supply line, so that the photovoltaic power generation heating base station, the ground source heat pump and the air source heat pump can simultaneously supply heat energy to multiple fan coil units and radiators through the regional heating line;

[0019] S4: When the heat energy required by the fan coil and radiator is less than the heat supply of the photovoltaic power generation base station, ground source heat pump and air source heat pump, the air source heat pump performs phase change heat storage operation on the excess heat energy through the phase change heat storage device. When the heat energy required by the fan coil and radiator is greater than the heat supply of the photovoltaic power generation base station, ground source heat pump and air source heat pump, the air source heat pump continuously performs phase change heat storage through the phase change heat storage device through the power supply of the regional power supply line, and phase change heat release is performed through the phase change heat storage device to supplement the heating of the ground source heat pump. When the heat energy required by the fan coil and radiator is greater than the heat supply of the photovoltaic power generation base station, ground source heat pump and air source heat pump, the air source heat pump continuously performs phase change heat storage through the phase change heat storage device through the power supply of the regional power supply line, and phase change heat release is performed through the phase change heat storage device to supplement the heating of the ground source heat pump. When the heat supply of photovoltaic power generation base stations, ground source heat pumps, air source heat pumps and phase change heat storage equipment is used, the municipal heating end is intervened and the fan coil and radiator are further supplemented with heat energy. By introducing ground source heat pumps, air source heat pumps, phase change heat storage equipment and photovoltaic power generation base stations for mutual electric-heat conversion, the full utilization, cross-season utilization and heat storage peak regulation of photovoltaic thermal energy can be achieved. Through the reasonable allocation of resources, the full utilization of renewable energy can be achieved, the cost of heating energy can be reduced, and the distributed multi-energy complementarity can be used to greatly improve the safety, stability and resilience of the regional heating system;

[0020] S5: When multiple photovoltaic power generation and heating base stations are providing power and heating at multiple locations, the regional heating lines and the underground pipe assemblies are both connected to the hot water delivery pipe, and the underground pipe assemblies are connected to the cold water delivery pipe, so that the PV / T collector panels can continuously generate electricity and store electricity in the temporary storage battery under the support of the photovoltaic support frame. At the same time, the PV / T collector panels can draw cold water from the cold water delivery pipe to the inner side of the underground pipe assembly through the water inlet pipe to heat it up and deliver it to the hot water temporary storage tank through the drainage pipe for temporary storage, thereby facilitating the hot water temporary storage tanks in multiple photovoltaic power generation and heating base stations to deliver the hot water to the regional heating lines and the underground pipe assemblies respectively through the hot water delivery pipe during the heating stage and the non-heating stage. By setting up the temporary storage battery for the temporary storage of electric energy, the electric energy input to the regional power supply line can be effectively regulated, and the photovoltaic power generation and heating base station can maintain the stability of power transmission to the regional power supply line in different time periods and under different weather conditions. The temporary storage of heat energy by the hot water temporary storage tank can stably regulate the input of heat energy to the underground pipe assembly and the regional heating line.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention divides the distributed multi-energy complementary heating system into a non-heating stage and a heating stage. The heat energy generated by multiple photovoltaic power generation and heating base stations is transported to the buried pipe assembly through a transmission pipeline. At the same time, the electric energy generated by multiple photovoltaic power generation and heating base stations is transported to the ground source heat pump and the air source heat pump through the regional power supply line. The condensation heat in the refrigeration process of the ground source heat pump in the non-heating stage is recovered, which not only effectively realizes the cross-seasonal utilization of energy, reduces the energy storage cost, but also improves the heating guarantee capability. The photovoltaic power generation and heating base station can supply power to multiple user power terminals through the regional power supply line to avoid power loss;

[0023] 2. In the heating stage of the present invention, the photovoltaic power generation and heating base station transmits excess electric energy to the user's electricity end through the regional power supply line for full utilization, and the ground source heat pump extracts the heat energy stored inside the buried pipe assembly through the power supply of the regional power supply line, so that the photovoltaic power generation and heating base station, the ground source heat pump and the air source heat pump simultaneously supply heat energy to multiple fan coil units and radiators through the regional heating line, and the air source heat pump performs phase change heat storage operation on the excess heat energy through the phase change heat storage device, and releases heat through the phase change heat storage device, so as to supplement the heating of the ground source heat pump, intervene through the municipal heating end and further supplement the heat energy to the fan coil units and radiators;

[0024] 3. The present invention realizes the full utilization, cross-seasonal utilization and heat storage peak regulation of photovoltaic thermal energy by introducing ground source heat pumps, air source heat pumps, phase change heat storage equipment and photovoltaic power generation and heating base stations for mutual electric-to-heat conversion. The full utilization of renewable energy is achieved through the rational allocation of resources, and the cost of heating energy is reduced while the safety, stability and resilience of the regional heating system are greatly improved by utilizing distributed multi-energy complementarity. The temporary storage of electric energy by setting up a temporary storage battery can effectively regulate the input of electric energy into the regional power supply line, maintain the stability of power transmission from the photovoltaic power generation and heating base station to the regional power supply line in different time periods and under different weather conditions, and the temporary storage of heat energy by the hot water temporary storage tank can stably regulate the input of heat energy of the buried pipe assembly and the regional heating line. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of energy distribution in the non-heating stage of the present invention;

[0026] Figure 2 It is a schematic diagram of energy distribution in the heating stage of the present invention;

[0027] Figure 3 It is a schematic diagram of the capacity ladder selection of the air source heat pump of the present invention;

[0028] Figure 4 It is a schematic diagram of capacity selection of the phase change thermal storage device of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the photovoltaic power generation and heating base station of the present invention;

[0030] Figure 6 It is a side view of the photovoltaic power generation and heating base station of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the centralized storage box of the present invention;

[0032] Figure 8 It is a flow chart of the distributed multi-energy complementary heating system of the present invention.

[0033] In the figure: 1. Photovoltaic power generation and heating base station; 101. PV / T collector; 102. Centralized storage box; 103. Power connection insulating cover plate; 104. Light detection seat; 105. Photovoltaic support frame; 106. Collector plate; 107. Drain pipe; 108. Water inlet pipe; 109. Cable installation sleeve; 110. Cold water delivery main pipe; 111. Hot water delivery main pipe; 112. Hot water temporary storage box; 113. Power connection box; 114. Power temporary storage battery; 115. Cooling fan box; 2. Municipal power grid; 3. User power end; 4. Regional power supply line; 5. Underground pipe assembly; 6. Ground source heat pump; 7. Air source heat pump; 8. Regional heating line; 9. Fan coil; 10. Phase change thermal storage equipment; 11. Municipal heating end; 12. Radiator. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] See also Figure 1 and Figure 2 , an embodiment provided by the present invention: a distributed multi-energy complementary heating system for enhancing heating safety resilience, comprising a plurality of photovoltaic power generation and heating base stations 1, the photovoltaic power generation and heating base stations 1 are electrically connected to a regional power supply line 4, the regional power supply line 4 is electrically connected to a ground source heat pump 6 and an air source heat pump 7, the ground source heat pump 6 and the air source heat pump 7 are both provided with a transmission pipeline, and the regional power supply line 4 is used to facilitate the transmission of the electric energy generated by the photovoltaic power generation and heating base station 1 to the ground source heat pump 6 and the air source heat pump 7;

[0036] The ground source heat pump 6 and the air source heat pump 7 are both connected to the buried pipe assembly 5 through a transmission pipeline, the photovoltaic power generation and heating base station 1 is connected to the buried pipe assembly 5 through a transmission pipeline, a regional heating line 8 is installed at the output end of the ground source heat pump 6 and the air source heat pump 7, a phase change heat storage device 10 is installed between the air source heat pump 7 and the regional heating line 8, a plurality of fan coil units 9 and a radiator 12 are installed at the output end of the regional heating line 8, and the output end of the regional heating line 8 is connected to the plurality of fan coil units 9 and the radiator 12, and the heat energy of the photovoltaic power generation and heating base station 1, the ground source heat pump 6, the air source heat pump 7 and the phase change heat storage device 10 is synchronously transported to the fan coil units 9 and the radiator 12 through the regional heating line 8;

[0037] The regional power supply line 4 is electrically connected to the municipal power grid 2 and multiple user power terminals 3. The input end of the regional power supply line 4 is connected to the municipal power grid 2 and multiple photovoltaic power generation and heating base stations 1. The output end of the regional power supply line 4 is connected to the ground source heat pump 6, the air source heat pump 7 and multiple user power terminals 3. The regional heating line 8 is connected to the municipal heating terminal 11 through a transmission pipeline. The input end of the regional heating line 8 is connected to the ground source heat pump 6, the air source heat pump 7, the phase change heat storage device 10 and the municipal heating terminal 11. The municipal power grid 2 is a power plant, and the municipal heating terminal 11 is a heating station. Intervention is carried out through the municipal heating terminal 11 to further supplement the fan coil 9 and the radiator 12 with heat energy.

[0038] See also Figures 5 to 8 The photovoltaic power generation and heating base station 1 includes a centralized storage box 102, and a plurality of photovoltaic power generation and heating components are fixedly installed on one side of the centralized storage box 102. The photovoltaic power generation and heating components are composed of a PV / T collector plate 101 and a photovoltaic support frame 105. The PV / T collector plate 101 is fixedly connected to the upper end of the photovoltaic support frame 105. A collector plate 106 is fixedly installed in the middle of the lower end surface of the PV / T collector plate 101. A drainage pipe 107 is installed in the middle of the collector plate 106. An inlet pipe 108 is installed at the upper end of the collector plate 106. The inner side of the centralized storage box 102 is provided with a heating area and A cold water delivery pipe 110 is installed inside the cold water delivery area and the heating area, a hot water temporary storage tank 112 is installed below the cold water delivery pipe 110, and a hot water delivery pipe 111 is installed on the lower end surface of the hot water temporary storage tank 112. The hot water delivery pipe 111 and the hot water temporary storage tank 112 are all arranged inside the heating area. The cold water delivery pipe 110, the hot water delivery pipe 111 and the hot water temporary storage tank 112 are all fixedly connected to the centralized storage tank 102. The temporary storage of heat energy by the hot water temporary storage tank 112 can stably regulate the input of heat energy of the buried pipe assembly 5 and the regional heating line 8;

[0039] The output ends of the multiple current collecting plates 106 are connected to the hot water temporary storage tank 112 through multiple drainage pipes 107, and the input ends of the multiple current collecting plates 106 are connected to the cold water delivery main pipe 110 through multiple water inlet pipes 108. Solenoid valves are provided on the inner sides of the drainage pipes 107 and the water inlet pipes 108. The cold water delivery main pipe 110 and the hot water delivery main pipe 111 are connected to the buried pipe assembly 5, so that the PV / T collector 101 can extract, heat and deliver the cold water in the cold water delivery main pipe 110 to the inner side of the hot water delivery main pipe 111 through the current collecting plates 106, the drainage pipes 107 and the water inlet pipes 108, thereby facilitating the replenishment of heat energy in the buried pipe assembly 5;

[0040] See also Figure 7 A power connection box 113 is installed on the inner side of the cold transmission area, a cooling fan box 115 is fixedly installed on one end of the power connection box 113, a temporary power storage battery 114 is fixedly installed on the other end of the power connection box 113, a light detection seat 104 is fixedly installed in the middle of the upper end surface of the centralized storage box 102, the light detection seat 104 is composed of a glass cover and an illuminance sensor, the temporary power storage battery 114 is electrically connected to the illuminance sensor and the regional power supply line 4, a power connection insulating cover plate 103 is fixedly installed on the other side of the centralized storage box 102, a cable installation sleeve 109 is fixedly installed on the upper end of the power connection insulating cover plate 103, the temporary power storage battery 114 is electrically connected to multiple PV / T collectors 101, and the temporary storage of electric energy by setting the temporary power storage battery 114 can effectively regulate the electric energy input from the regional power supply line 4, and maintain the stable power transmission of the photovoltaic power generation base station 1 to the regional power supply line 4 in different time periods and under different weather conditions.

[0041] See also Figure 1 When the local heat pump 6 is in the powered-on cooling state, cold water is transported to the fan coil 9 through the regional heating line 8. When the fan coil 9 is running, a cold air flow is generated. Through the transport pipeline and the regional heating line 8, cold air can be output to multiple fan coils 9, which is convenient for full utilization.

[0042] See also Figure 2 When the ground source heat pump 6 is in the powered-on state, it extracts the heat energy of the buried pipe assembly 5 through the delivery pipeline and delivers hot water to the fan coil 9 and the radiator 12. When the fan coil 9 and the radiator 12 are in operation, a hot air flow is generated, which facilitates the ground source heat pump 6 to extract and use the heat energy stored in the buried pipe assembly 5.

[0043] See also Figure 3 , PN is the total installed capacity of the air source heat pump, PH is the high load operation capacity of the air source heat pump, and PL is the low load operation capacity of the air source heat pump.

[0044] See also Figure 4 , PN is the capacity of phase change thermal storage material.

[0045] See also Figure 8 A heating method of a distributed multi-energy complementary heating system for enhancing heating safety resilience comprises the following steps:

[0046] S1: The distributed multi-energy complementary heating system is divided into a non-heating stage and a heating stage. In the non-heating stage, the heat energy generated by multiple photovoltaic power generation and heating base stations 1 is transported to the buried pipe assembly 5 through a transmission pipeline. At the same time, the electric energy generated by multiple photovoltaic power generation and heating base stations 1 is transported to the ground source heat pump 6 and the air source heat pump 7 through the regional power supply line 4, so that the heat energy generated by the air source heat pump 7 through the electric drive and the condensation heat energy generated by the ground source heat pump 6 when running the cooling operation are both transported to the buried pipe assembly 5 through the transmission pipeline for heat energy storage operation. When the ground source heat pump 6 is cooling, it can output cold air to multiple fan coil units 9 through the transmission pipeline and the air source heat pump 8, which is convenient for full utilization. The condensation heat in the cooling process of the ground source heat pump 6 in the non-heating stage is recovered, which not only effectively realizes the cross-seasonal utilization of energy, reduces the energy storage cost, but also improves the heating guarantee capability;

[0047] S2: When there is excess heat energy in the underground pipe assembly 5, the photovoltaic power generation and heating base station 1 can supply power to multiple user power terminals 3 through the regional power supply line 4 to avoid power loss. When the power generated by the photovoltaic power generation and heating base station 1 cannot meet the efficient operation of the ground source heat pump 6 and the air source heat pump 7, the municipal power grid 2 is used to supplement the power to avoid the lack of heat energy in the underground pipe assembly 5 affecting the stable heating during the heating stage;

[0048] S3: In the heating stage, when the electric energy generated by the photovoltaic power generation and heating base station 1 is greater than the requirements of the ground source heat pump 6 and the air source heat pump 7, the photovoltaic power generation and heating base station 1 transmits the excess electric energy to the user power end 3 through the regional power supply line 4 for full utilization. When the electric energy generated by the photovoltaic power generation and heating base station 1 is less than the requirements of the ground source heat pump 6 and the air source heat pump 7, the regional power supply line 4 stops supplying power to the user power end 3 and supplements the electric energy through the municipal power grid 2. At this time, the ground source heat pump 6 extracts the heat energy stored inside the buried pipe assembly 5 through the power supply of the regional power supply line 4, so that the photovoltaic power generation and heating base station 1, the ground source heat pump 6 and the air source heat pump 7 simultaneously supply heat energy to multiple fan coil units 9 and radiators 12 through the regional heating line 8;

[0049] S4: When the heat energy required by the fan coil unit 9 and the radiator 12 is less than the heat supply of the photovoltaic power generation heating base station 1, the ground source heat pump 6 and the air source heat pump 7, the air source heat pump 7 performs phase change heat storage operation on the excess heat energy through the phase change heat storage device 10. When the heat energy required by the fan coil unit 9 and the radiator 12 is greater than the heat supply of the photovoltaic power generation heating base station 1, the ground source heat pump 6 and the air source heat pump 7, the air source heat pump 7 continuously performs phase change heat storage through the phase change heat storage device 10 through the power supply of the regional power supply line 4, and phase change heat release is performed through the phase change heat storage device 10 to supplement the heating of the ground source heat pump 6. When the required heat energy is greater than the heat supply of the photovoltaic power generation and heating base station 1, the ground source heat pump 6, the air source heat pump 7 and the phase change heat storage device 10, the municipal heating end 11 intervenes and further supplements the fan coil 9 and the radiator 12 with heat energy. By introducing the ground source heat pump 6, the air source heat pump 7, the phase change heat storage device 10 and the photovoltaic power generation and heating base station 1 for mutual electric-heat conversion, the full utilization, cross-season utilization and heat storage peak regulation of photovoltaic thermal energy are realized. Through the reasonable allocation of resources, the full utilization of renewable energy is realized, the cost of heating energy is reduced, and the distributed multi-energy complementarity is used to greatly improve the safety, stability and resilience of the regional heating system;

[0050] S5: When multiple photovoltaic power generation and heating base stations 1 are providing power and heating at multiple locations, the regional heating line 8 and the underground pipe assembly 5 are both connected to the hot water delivery pipe 111, and the underground pipe assembly 5 is connected to the cold water delivery pipe 110, so that the PV / T collector 101 can continuously generate electricity and store electricity in the temporary storage battery 114 under the support of the photovoltaic support frame 105, and at the same time, the PV / T collector 101 can draw the cold water from the cold water delivery pipe 110 to the inside of the underground pipe assembly 5 through the water inlet pipe 108 to heat it and deliver it to the hot water temporary storage tank 112 through the drain pipe 107 Temporary storage is performed, so that the hot water temporary storage tanks 112 in multiple photovoltaic power generation and heating base stations 1 are transported to the regional heating line 8 and the buried pipe assembly 5 respectively through the hot water delivery main pipe 111 during the heating stage and the non-heating stage. By setting the temporary storage battery 114 for temporary storage of electric energy, the electric energy input from the regional power supply line 4 can be effectively regulated, and the photovoltaic power generation and heating base station 1 can maintain stable power transmission to the regional power supply line 4 in different time periods and different weather conditions. The temporary storage of heat energy by the hot water temporary storage tank 112 can stably regulate the input of heat energy of the buried pipe assembly 5 and the regional heating line 8.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A distributed multi-energy complementary heating system for enhancing heating safety resilience, comprising a plurality of photovoltaic power generation and heating base stations (1), wherein the photovoltaic power generation and heating base stations (1) are electrically connected to a regional power supply line (4), wherein the regional power supply line (4) is electrically connected to a ground source heat pump (6) and an air source heat pump (7), wherein the ground source heat pump (6) and the air source heat pump (7) are both provided with a transmission pipeline, wherein the ground source heat pump (6) and the air source heat pump (7) are both connected to an underground pipe assembly (5) via the transmission pipeline, and wherein: The photovoltaic power generation and heating base station (1) is connected to the buried pipe assembly (5) via a transmission pipeline; a regional heating circuit (8) is installed at the output end of the ground source heat pump (6) and the air source heat pump (7); a phase change heat storage device (10) is installed between the air source heat pump (7) and the regional heating circuit (8); and a plurality of fan coil units (9) and a radiator (12) are installed at the output end of the regional heating circuit (8); The regional power supply line (4) is electrically connected to a municipal power grid (2) and a plurality of user power terminals (3), and the regional heating line (8) is connected to a municipal heating terminal (11) via a transmission pipeline.

2. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 1, characterized in that: When the ground source heat pump (6) is in a powered cooling state, cold water is transported to the fan coil unit (9) via the regional heating line (8), and a cold air flow is generated when the fan coil unit (9) is in operation.

3. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 1, characterized in that: When the ground source heat pump (6) is in a powered-on state, it delivers hot water through a delivery pipeline and five pairs of fan coil units (9) and a radiator (12). When the fan coil units (9) and the radiator (12) are in operation, a hot air flow is generated.

4. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 1, characterized in that: The input end of the regional power supply line (4) is connected to the municipal power grid (2) and a plurality of photovoltaic power generation and heating base stations (1); the output end of the regional power supply line (4) is connected to a ground source heat pump (6), an air source heat pump (7) and a plurality of user power terminals (3); the input end of the regional heating line (8) is connected to the ground source heat pump (6), the air source heat pump (7), a phase change heat storage device (10) and a municipal heating terminal (11); and the output end of the regional heating line (8) is connected to a plurality of fan coil units (9) and a radiator (12).

5. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 4, characterized in that: The municipal power grid (2) is a power plant, and the municipal heating end (11) is a heating station.

6. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 1, characterized in that: The photovoltaic power generation and heating base station (1) comprises a centralized storage box (102), a plurality of photovoltaic power generation and heating components are fixedly installed on one side of the centralized storage box (102), the photovoltaic power generation and heating components are composed of a PV / T heat collecting plate (101) and a photovoltaic support frame (105), the PV / T heat collecting plate (101) is fixedly connected to the upper end of the photovoltaic support frame (105), and a current collecting plate (106) is fixedly installed in the middle of the lower end surface of the PV / T heat collecting plate (101). A drainage pipe (107) is installed in the middle of the collecting plate (106), a water inlet pipe (108) is installed at the upper end of the collecting plate (106), a heating area and a cooling area are provided inside the centralized storage box (102), a cold water delivery pipe (110) is installed inside the heating area, a hot water temporary storage tank (112) is installed below the cold water delivery pipe (110), and a hot water delivery pipe (111) is installed on the lower end surface of the hot water temporary storage tank (112).

7. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 6, characterized in that: The hot water delivery pipe (111) and the hot water temporary storage tank (112) are both arranged on the inner side of the heating area; the cold water delivery pipe (110), the hot water delivery pipe (111) and the hot water temporary storage tank (112) are all fixedly connected to the centralized storage tank (102); the output ends of the plurality of current collecting plates (106) are connected to the hot water temporary storage tank (112) through a plurality of drainage pipes (107); the input ends of the plurality of current collecting plates (106) are connected to the cold water delivery pipe (110) through a plurality of water inlet pipes (108); solenoid valves are provided on the inner sides of the drainage pipes (107) and the water inlet pipes (108); and the cold water delivery pipe (110) and the hot water delivery pipe (111) are connected to the buried pipe assembly (5).

8. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 7, characterized in that: An electrical connection box (113) is installed inside the cold transport area, a cooling fan box (115) is fixedly installed on one end of the electrical connection box (113), and a temporary power storage battery (114) is fixedly installed on the other end of the electrical connection box (113). An electrical connection insulating cover plate (103) is fixedly installed on the other side of the centralized storage box (102), and a cable installation sleeve plate (109) is fixedly installed on the upper end of the electrical connection insulating cover plate (103). The temporary power storage battery (114) is electrically connected to a plurality of PV / T collectors (101).

9. A distributed multi-energy complementary heating system for enhancing heating safety resilience according to claim 8, characterized in that: A light detection seat (104) is fixedly mounted in the middle of the upper end surface of the centralized storage box (102), the light detection seat (104) being composed of a glass cover and a light intensity sensor, and the power temporary storage battery (114) being electrically connected to the light intensity sensor and the regional power supply line (4).

10. A heating method for a distributed multi-energy complementary heating system with enhanced heating safety resilience, characterized in that: A heating method for a distributed multi-energy complementary heating system with enhanced heating safety resilience according to any one of claims 1 to 9 comprises the following steps: S1: The distributed multi-energy complementary heating system is divided into a non-heating stage and a heating stage. In the non-heating stage, the heat energy generated by the multiple photovoltaic power generation and heating base stations (1) is transported to the buried pipe assembly (5) through the transmission pipeline. At the same time, the electric energy generated by the multiple photovoltaic power generation and heating base stations (1) is transported to the ground source heat pump (6) and the air source heat pump (7) through the regional power supply line (4). The heat energy generated by the air source heat pump (7) through the electric drive and the condensation heat energy generated by the ground source heat pump (6) when it is running for cooling are both transported to the buried pipe assembly (5) through the transmission pipeline for heat energy storage operation. When the ground source heat pump (6) is cooling, it can output cold air to the multiple fan coil units (9) through the transmission pipeline and the regional heating line (8), which is convenient for full utilization. The condensation heat in the cooling process of the ground source heat pump (6) in the non-heating stage is recovered, which not only effectively realizes the cross-seasonal utilization of energy and reduces the energy storage cost, but also improves the heating guarantee capability. S2: When there is excess heat energy in the underground pipe assembly (5), the photovoltaic power generation and heating base station (1) can supply power to multiple user power terminals (3) through the regional power supply line (4), thereby avoiding power loss. When the power generated by the photovoltaic power generation and heating base station (1) cannot meet the high-efficiency operation of the ground source heat pump (6) and the air source heat pump (7), the municipal power grid (2) supplements the power, thereby avoiding the lack of heat energy in the underground pipe assembly (5) affecting the stable heat supply during the heating stage. S3: In the heating stage, when the electric energy generated by the photovoltaic power generation and heating base station (1) is greater than the electric energy required by the ground source heat pump (6) and the air source heat pump (7), the photovoltaic power generation and heating base station (1) transmits the excess electric energy to the user's power end (3) through the regional power supply line (4) for full utilization. When the electric energy generated by the photovoltaic power generation and heating base station (1) is less than the electric energy required by the ground source heat pump (6) and the air source heat pump (7), the regional power supply line (4) stops supplying power to the user's power end (3) and replenishes electric energy through the municipal power grid (2). At this time, the ground source heat pump (6) extracts the heat energy stored inside the buried pipe assembly (5) through the power supply of the regional power supply line (4), so that the photovoltaic power generation and heating base station (1), the ground source heat pump (6) and the air source heat pump (7) simultaneously supply heat energy to the multiple fan coil units (9) and the radiator (12) through the regional heating line (8); S4: When the heat energy required by the fan coil unit (9) and the radiator (12) is less than the heat supply of the photovoltaic power generation heating base station (1), the ground source heat pump (6) and the air source heat pump (7), the air source heat pump (7) performs phase change heat storage operation on the excess heat energy through the phase change heat storage device (10); when the heat energy required by the fan coil unit (9) and the radiator (12) is greater than the heat supply of the photovoltaic power generation heating base station (1), the ground source heat pump (6) and the air source heat pump (7), the air source heat pump (7) continuously performs phase change heat storage through the phase change heat storage device (10) through the power supply of the regional power supply line (4), and phase change heat release is performed through the phase change heat storage device (10), so as to supplement the heat supply of the ground source heat pump (6); when the fan coil unit (9) and When the heat energy required by the radiator (12) is greater than the heat supply of the photovoltaic power generation and heating base station (1), the ground source heat pump (6), the air source heat pump (7) and the phase change heat storage device (10), the municipal heating end (11) intervenes and further supplements the fan coil (9) and the radiator (12). By introducing the ground source heat pump (6), the air source heat pump (7), the phase change heat storage device (10) and the photovoltaic power generation and heating base station (1) to perform mutual electric heat conversion, the full utilization, cross-season utilization and heat storage peak regulation of photovoltaic thermal energy are achieved. Through the reasonable allocation of resources, the full utilization of renewable energy is achieved, the cost of heating energy is reduced, and the distributed multi-energy complementarity is used to greatly improve the safety, stability and resilience of the regional heating system; S5: When multiple photovoltaic power generation and heating base stations (1) are providing power and heating at multiple locations, the regional heating line (8) and the underground pipe assembly (5) are both connected to the hot water delivery pipe (111), and the underground pipe assembly (5) is connected to the cold water delivery pipe (110), so that the PV / T heat collecting panel (101) can continuously generate electricity and store electricity in the temporary storage battery (114) under the support of the photovoltaic support frame (105), and at the same time, the PV / T heat collecting panel (101) can draw cold water from the cold water delivery pipe (110) to the inside of the underground pipe assembly (5) through the water inlet pipe (108), heat it up, and deliver it to the hot water temporary storage tank (114) through the drainage pipe (107). 2), thereby facilitating the hot water temporary storage tanks (112) in the plurality of photovoltaic power generation and heating base stations (1) to be transported to the regional heating line (8) and the underground pipe assembly (5) respectively through the hot water transport main pipe (111) during the heating stage and the non-heating stage. By setting up a power temporary storage battery (114) for temporary storage of electric energy, the electric energy input from the regional power supply line (4) can be effectively regulated, and the photovoltaic power generation and heating base station (1) can maintain stable power transmission to the regional power supply line (4) in different time periods and under different weather conditions. By temporarily storing heat energy in the hot water temporary storage tank (112), the heat energy input from the underground pipe assembly (5) and the regional heating line (8) can be stably regulated.

Images