CN220958626U - PV/T coupling double-source heat pump building heating system - Google Patents
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Abstract
The utility model discloses a PV/T coupling double-source heat pump building heating system, which comprises a solar heat storage cycle, a water source heat pump heating cycle, an air energy heat storage cycle and an air energy direct heating cycle.
Description
Technical Field
The utility model relates to the technical field of renewable energy sources, in particular to a PV/T coupling double-source heat pump building heating system.
Background
The northern town heating energy consumption is high in intensity, the 2021 northern town heating energy consumption is about 2.21 hundred million tce, 19% of the total energy consumption of the national building is occupied, and the energy consumption intensity is about 13.1 kgce/square meter. The heat source structure is optimized, the heat source efficiency is improved, clean low-carbon heating such as air energy, solar energy and geothermal energy is promoted, and the implementation of renewable energy substitution action is an important measure for achieving the 'double-carbon' target.
The Photovoltaic solar module (PV/T) recovers redundant heat energy (waste heat) while generating electricity by using the Photovoltaic power, has a cooling effect on the Photovoltaic cells, can further improve the power generation efficiency and the service life of the module, and can achieve the comprehensive utilization efficiency of the solar energy of more than 80 percent.
The heating terminal heat dissipating device in northern towns mainly comprises a fan coil, a radiator, a floor heating coil, a hot air curtain and the like, wherein the radiator has higher specific gravity. The existing building heating system is transformed, and most of the existing building heating system is influenced by factors such as sites, investment, office environments and the like, so that the terminal heat dissipation form is not suitable to be replaced. And the requirement on the water inlet temperature of the radiator of the tail end heat radiation device is high, and a proper heat source needs to be matched. The ground source heat pump buried pipe system is not very suitable to be limited by the field; although the air source heat pump is flexible to arrange, the energy efficiency coefficient is low in heating in northern severe cold and cold areas, and the energy efficiency coefficient reaching 55 ℃ is lower. In winter, the PV/T can generate hot water (waste heat) at 30 ℃, is very suitable for the low-temperature heat source heat-taking side of the high-temperature water source heat pump, and therefore, the heating water temperature is increased by consuming a little electric energy (photovoltaic electricity) through the high-temperature water source heat pump, and the solar heating is realized. Meanwhile, the high-temperature water source heat pump is used for absorbing solar photovoltaic power generation, so that fossil energy consumption is reduced, clean low-carbon heating is realized, and building heating operation cost is reduced.
In view of this, the present utility model has been made.
Disclosure of utility model
The utility model aims to provide a PV/T coupled double-source heat pump building heating system, which realizes clean low-carbon heating by utilizing solar energy and air energy through heat source structure optimization and heat source efficiency improvement, has wide application prospect and is beneficial to popularization and application.
In order to achieve the above purpose, the utility model provides a PV/T coupled double-source heat pump building heating system, which comprises a PV/T, a high-temperature water source heat pump, a low-temperature air source heat pump, a heat storage water tank, a tail radiator, a first heat collection control valve, a second heat collection control valve, a first heat storage control valve, a second heat storage control valve, a first air energy heating control valve, a second air energy heating control valve, a first water source heating control valve, a second water source heating control valve, a heat storage pump, a source side pump, a tail end pump, a reverse control integrated machine and a power grid;
The system for monitoring three temperatures of the PV/T outlet, the high-temperature outlet of the heat storage water tank and the outlet of the tail end radiating fin comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor is used for monitoring the outlet temperature of the PV/T, the second temperature sensor is used for monitoring the high-temperature outlet temperature of the heat storage water tank, and the third temperature sensor is used for monitoring the outlet temperature of the tail end radiating fin; the controller is respectively connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the first heat collection control valve, the second heat collection control valve, the first heat storage control valve, the second heat storage control valve, the first air energy heating control valve, the second air energy heating control valve, the first water source heating control valve, the second water source heating control valve, the heat storage pump, the source side pump and the tail end pump;
The outlet of the PV/T, the first heat collection control valve, the high-temperature inlet of the heat storage water tank, the low-temperature outlet of the heat storage water tank, the heat storage pump, the second heat collection control valve and the inlet of the PV/T are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form solar heat storage circulation;
The high-temperature outlet of the heat storage water tank, the source side pump, the inlet of the evaporator of the high-temperature water source heat pump unit, the outlet of the evaporator of the high-temperature water source heat pump unit and the low-temperature inlet of the heat storage water tank are sequentially connected through a pipeline according to the flowing direction of a heat transfer working medium to form a water source heat pump heat taking cycle;
The outlet of the condenser of the high-temperature water source heat pump unit, the first water source heating control valve, the inlet of the tail radiator, the outlet of the tail radiator, the tail pump, the second water source heating control valve and the inlet of the condenser of the high-temperature water source heat pump unit are sequentially connected through pipelines according to the flowing direction of heat transfer working media to form a water source heat pump heating cycle;
The outlet of the low-temperature air source heat pump, the first heat storage control valve, the high-temperature inlet of the heat storage water tank, the low-temperature outlet of the heat storage water tank, the heat storage pump, the second heat storage control valve and the inlet of the low-temperature air source heat pump are sequentially connected through pipelines according to the flowing direction of a heat transfer working medium to form an air energy heat storage cycle;
The outlet of the low-temperature air source heat pump, the first air energy heating control valve, the inlet of the tail radiator, the outlet of the tail radiator, the tail pump, the second air energy heating control valve and the inlet of the low-temperature air source heat pump are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form an air energy direct heating cycle.
Preferably, the PV/T adopts a vacuum tube type solar photovoltaic photo-thermal integrated component.
Preferably, the control valve is an electric control valve and is provided in each system cycle.
Preferably, the controller is connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the first heat collection control valve, the second heat collection control valve, the first heat storage control valve, the second heat storage control valve, the first air energy heating control valve, the second air energy heating control valve, the first water source heating control valve, the second water source heating control valve, the heat storage pump, the source side pump and the end pump respectively.
Preferably, the PV/T is sequentially connected with a reverse control integrated machine and a power grid, the reverse control integrated machine is respectively connected with a high-temperature water source heat pump, a low-temperature air source heat pump, a heat storage pump, a source side pump and a tail end pump load through 380V alternating current buses, and direct current sent by the PV/T enters the reverse control integrated machine to be converted into alternating current water source heat pump, low-temperature air source heat pump, heat storage pump, source side pump, tail end pump load or residual electricity enters the power grid; the PV/T photovoltaic power generation is carried out all the year round, and a mode of 'self-power-consumption and residual power surfing' is adopted.
The PVT coupled double-source heat pump building heating system provided by the utility model has the following beneficial effects.
1. The utility model has strong applicability in severe cold and cold areas in north China, is especially suitable for the condition that the existing or newly built building tail end heat dissipation equipment adopts a radiator, utilizes PV/T low-temperature waste heat, and utilizes a high-temperature water source heat pump to consume a little electric energy (photovoltaic electricity) to improve the heating water temperature, thereby realizing solar heating.
2. When the solar radiation is not generated in the continuous cloudy day or at night, and the high-temperature outlet temperature value of the heat storage water tank is lower than the second set temperature set value, the utility model can start air to store heat for the heat storage water tank, thereby improving the guarantee of the solar heating system.
3. According to the utility model, the photovoltaic cell is cooled, so that the PV/T power generation efficiency can be further improved, and the service life of the photovoltaic cell can be further prolonged; the solar heating equipment can absorb solar photovoltaic power generation, reduce fossil energy consumption and reduce building heating operation cost.
4. According to the utility model, through heat source structure optimization and heat source efficiency improvement, clean low-carbon heating is realized by utilizing solar energy and air energy, and the method has a wide application prospect and is beneficial to popularization and application.
Drawings
FIG. 1 is a schematic diagram of a PV/T coupled dual source heat pump building heating system.
In the figure:
PV/T2 high temperature water source heat pump 3 low temperature air source heat pump 4 heat storage tank 5 end radiator 6 valve 611 first heat collection control valve 612 second heat collection control valve 621 first heat storage control valve 622 second heat storage control valve 631 first air energy heating control valve 632 second air energy heating control valve 641 first water source heating control valve 642 second water source heating control valve 7 water pump 71 heat storage pump 72 source side pump 73 end pump 8 reverse control all-in-one 9 electric network 10 first temperature sensor 11 second temperature sensor 12 third temperature sensor 13 controller.
Detailed Description
The utility model will be further described with reference to specific examples and figures to aid in the understanding of the utility model.
As shown in FIG. 1, the structure schematic diagram of the PV/T coupling dual-source heat pump building heating system provided by the utility model is shown. The PV/T coupled double-source heat pump building heating system comprises a PV/T1, a high-temperature water source heat pump 2, a low-temperature air source heat pump 3, a heat storage water tank 4, a tail radiator 5, a first heat collection control valve 611, a second heat collection control valve 612, a first heat storage control valve 621, a second heat storage control valve 622, a first air energy heating control valve 631, a second air energy heating control valve 632, a first water source heating control valve 641, a second water source heating control valve 642, a heat storage pump 71, a source side pump 72, a tail pump 73, a reverse control integrated machine 8, a power grid 9, a first temperature sensor 10, a second temperature sensor 11, a third temperature sensor 12 and a controller 13; the PV/T1 adopts a vacuum tube type solar photovoltaic photo-thermal integrated component. The control valve is an electric control valve and is arranged in each system cycle.
The system for monitoring three temperatures of a PV/T outlet, a high-temperature outlet of a heat storage water tank and an outlet of a tail end radiating fin comprises a first temperature sensor 10, a second temperature sensor 11 and a third temperature sensor 12, wherein the first temperature sensor 10 is used for monitoring the outlet temperature of the PV/T1, the second temperature sensor 11 is used for monitoring the high-temperature outlet temperature of the heat storage water tank 4, and the third temperature sensor 12 is used for monitoring the outlet temperature of the tail end radiating fin 5; the controller 13 is connected to the first temperature sensor 10, the second temperature sensor 11, the third temperature sensor 12, the first heat collecting control valve 611, the second heat collecting control valve 612, the first heat storage control valve 621, the second heat storage control valve 622, the first air energy heating control valve 631, the second air energy heating control valve 632, the first water source heating control valve 641, the second water source heating control valve 642, the heat storage pump 71, the source side pump 72, and the end pump 73, respectively.
The PV/T1 is sequentially connected with the reverse control integrated machine 8 and the power grid 9, the reverse control integrated machine 8 is respectively connected with the high-temperature water source heat pump 2, the low-temperature air source heat pump 3, the heat storage pump 71, the source side pump 72 and the tail end pump 73 through 380V alternating current buses, direct current sent by the PV/T1 enters the reverse control integrated machine 8 and is converted into alternating current high-temperature water source heat pump 2, low-temperature air source heat pump 3, the heat storage pump 71, the source side pump 72 and the tail end pump 73 or residual electricity enters the power grid 9; the PV/T1 photovoltaic power generation is carried out all the year round, and a mode of 'self-power-consumption and residual power surfing' is adopted.
The outlet of the PV/T1, the first heat collection control valve 611, the high-temperature inlet of the heat storage water tank 4, the low-temperature outlet of the heat storage water tank 4, the heat storage pump 71, the second heat collection control valve 612 and the inlet of the PV/T1 are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form a solar heat storage cycle.
The high-temperature outlet of the heat storage water tank 4, the source side pump 72, the inlet of the evaporator of the high-temperature water source heat pump unit 2, the outlet of the evaporator of the high-temperature water source heat pump unit 2 and the low-temperature inlet of the heat storage water tank 4 are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form a water source heat pump heat-taking cycle, so that the heat energy multiplication effect of solar energy can be realized, and the large-span energy cascade utilization of the heat storage water tank 4 can be realized.
The outlet of the condenser of the high-temperature water source heat pump unit 2, the inlet of the first water source heating control valve 641, the inlet of the tail radiator 5, the outlet of the tail radiator 5, the tail pump 73, the second water source heating control valve 642 and the inlet of the condenser of the high-temperature water source heat pump unit 2 are sequentially connected through pipelines according to the flowing direction of heat transfer working media to form a water source heat pump heating cycle, and the water source heat pump heating cycle needs to operate together with the water source heat pump heating cycle. The solar energy is used as a low-temperature source side, the temperature is increased through the high-temperature water source heat pump unit 2, and the temperature requirement of the tail end radiating fins 5 is met.
The outlet of the low-temperature air source heat pump 3, the first heat storage control valve 621, the high-temperature inlet of the heat storage water tank 4, the low-temperature outlet of the heat storage water tank 4, the heat storage pump 71, the second heat storage control valve 622, and the inlet of the low-temperature air source heat pump 3 are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form an air energy heat storage cycle, and when no solar radiation exists in the continuous cloudy days or at night, and the high-temperature outlet temperature value of the heat storage water tank 4 is lower than the set temperature (the second temperature sensor), the air energy heat storage cycle can be started.
The outlet of the low-temperature air source heat pump 3, the first air energy heating control valve 631, the inlet of the tail radiator 5, the outlet of the tail radiator 5, the tail end pump 73, the second air energy heating control valve 632, and the inlet of the low-temperature air source heat pump 3 are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form an air energy direct heating cycle, and the air energy direct heating cycle can be started when the heat load demand is relatively small at the initial stage or the final stage of heating or at night, so that the running time of the high-temperature water source heat pump unit 2 is reduced, and the running efficiency of a building heating system is improved.
The working flow of the utility model is as follows:
During the day, along with the continuous enhancement of the solar radiation amount, the heat collected by the PV/T1 is continuously increased, the outlet temperature of the PV/T1 is continuously increased, when the outlet of the PV/T1 reaches the first temperature set value (35 ℃ in this embodiment), the controller 13 outputs a signal to start the heat storage pump 71, at this time, the first heat collection control valve 611 and the second heat collection control valve 612 are both opened, the first heat storage control valve 621 and the second heat storage control valve 622 are both closed, and the heat collected by the PV/T1 is stored in the heat storage water tank 4 to be used as the heat source heat-taking side of the high-temperature water source heat pump, namely, the solar heat storage mode is operated. Meanwhile, the power generation efficiency of the PV/T1 is improved by cooling the PV/T1;
When the outlet of the end radiator 5 is lower than the third temperature set value (50 ℃ in the embodiment), the controller 13 outputs a signal to start the end pump 73, and at this time, the first water source heating control valve 641 and the second water source heating control valve 642 are both opened, and the first air energy heating control valve 631 and the second air energy heating control valve 632 are both closed, thereby heating the building, that is, running the water source heat pump heating cycle. And meanwhile, the controller 13 outputs a signal to the source side pump 72 to start, and extracts the heat stored in the heat storage water tank 4, namely, the water source heat pump heat-taking cycle is operated. At the moment, a small amount of electric energy (photovoltaic electricity) is consumed, so that the heat energy multiplication effect of solar energy is realized;
When no solar radiation exists in the continuous overcast days or at night, the evaporator inlet of the high-temperature water source heat pump unit 2 is lower than the second temperature set value (30 ℃ in the embodiment), the controller 13 outputs a signal to start the heat storage pump 71, at this time, the first air energy heating control valve 631 and the second air energy heating control valve 632 are both opened, and the first water source heating control valve 641 and the second water source heating control valve 642 are both closed, so that heat is stored in the heat storage water tank 4, namely, the air energy heat storage cycle is operated. When the heat load demand of the end radiator 5 is relatively small at the initial or final or night of heating, the controller 13 outputs a signal to start the end pump 73, and at this time, the first air energy heating control valve 631 and the second air energy heating control valve 632 are both opened, and the first water source heating control valve 641 and the second water source heating control valve 642 are both closed, so that the building is heated by the air energy, that is, the air energy direct heating cycle is operated. At this time, the operation time of the high-temperature water source heat pump unit 2 can be reduced, thereby improving the utilization efficiency of the building heating system.
The utility model has strong applicability in severe cold and cold areas in north China, and is especially suitable for the situation that the existing or newly-built building terminal heat dissipation equipment adopts a radiator. The radiator mainly adopts natural heat dissipation modes, namely three modes of specific heat conduction, radiation and convection: (1) The heat conduction, the heat medium in the radiator exchanges heat in the radiator and transfers heat to the inner wall of the radiator, and the inner wall transfers heat to the outer wall through heat conduction. (2) The radiation is mainly and the convection is auxiliary to radiate heat into the room, so the water temperature is required to be high. Compared with the traditional heat collector, the PV/T1 has lower water outlet temperature, utilizes the PV/T low-temperature waste heat, and increases the heating water temperature by consuming a little electric energy (photovoltaic electricity) through the high-temperature water source heat pump, thereby realizing solar heating.
According to the utility model, the problems of discontinuity, instability and stability of energy output and the like of solar energy under the influence of overcast and rainy weather, day and night and the like are considered, so that air can be designed to supplement, and the guarantee of a solar heating system is improved.
According to the utility model, the photovoltaic cell is cooled, so that the PV/T power generation efficiency can be further improved, and the service life of the photovoltaic cell can be further prolonged; the solar heating equipment can absorb solar photovoltaic power generation, reduce fossil energy consumption, reduce building heating operation cost, has wide application prospect, and is favorable for popularization and application.
Specific examples are set forth herein to illustrate the utility model in detail, and the description of the above examples is only for the purpose of aiding in understanding the core concept of the utility model. It should be noted that any obvious modifications, equivalents, or other improvements to those skilled in the art without departing from the inventive concept are intended to be included in the scope of the present utility model.
Claims (4)
1. The PV/T coupling double-source heat pump building heating system is characterized by comprising a PV/T, a high-temperature water source heat pump, a low-temperature air source heat pump, a heat storage water tank, a tail-end radiator, a first heat collection control valve, a second heat collection control valve, a first heat storage control valve, a second heat storage control valve, a first air energy heating control valve, a second air energy heating control valve, a first water source heating control valve, a second water source heating control valve, a heat storage pump, a source side pump, a tail-end pump, a reverse control integrated machine, a power grid, a first temperature sensor, a second temperature sensor, a third temperature sensor and a controller;
The system for monitoring three temperatures of the PV/T outlet, the high-temperature outlet of the heat storage water tank and the outlet of the tail end radiating fin comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor is used for monitoring the outlet temperature of the PV/T, the second temperature sensor is used for monitoring the high-temperature outlet temperature of the heat storage water tank, and the third temperature sensor is used for monitoring the outlet temperature of the tail end radiating fin; the controller is respectively connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the first heat collection control valve, the second heat collection control valve, the first heat storage control valve, the second heat storage control valve, the first air energy heating control valve, the second air energy heating control valve, the first water source heating control valve, the second water source heating control valve, the heat storage pump, the source side pump and the tail end pump;
The outlet of the PV/T, the first heat collection control valve, the high-temperature inlet of the heat storage water tank, the low-temperature outlet of the heat storage water tank, the heat storage pump, the second heat collection control valve and the inlet of the PV/T are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form solar heat storage circulation;
The high-temperature outlet of the heat storage water tank, the source side pump, the inlet of the evaporator of the high-temperature water source heat pump unit, the outlet of the evaporator of the high-temperature water source heat pump unit and the low-temperature inlet of the heat storage water tank are sequentially connected through a pipeline according to the flowing direction of a heat transfer working medium to form a water source heat pump heat taking cycle;
The outlet of the condenser of the high-temperature water source heat pump unit, the first water source heating control valve, the inlet of the tail radiator, the outlet of the tail radiator, the tail pump, the second water source heating control valve and the inlet of the condenser of the high-temperature water source heat pump unit are sequentially connected through pipelines according to the flowing direction of heat transfer working media to form a water source heat pump heating cycle;
The outlet of the low-temperature air source heat pump, the first heat storage control valve, the high-temperature inlet of the heat storage water tank, the low-temperature outlet of the heat storage water tank, the heat storage pump, the second heat storage control valve and the inlet of the low-temperature air source heat pump are sequentially connected through pipelines according to the flowing direction of a heat transfer working medium to form an air energy heat storage cycle;
The outlet of the low-temperature air source heat pump, the first air energy heating control valve, the inlet of the tail radiator, the outlet of the tail radiator, the tail pump, the second air energy heating control valve and the inlet of the low-temperature air source heat pump are sequentially connected through pipelines according to the flowing direction of the heat transfer working medium to form an air energy direct heating cycle.
2. The PV/T coupled dual source heat pump building heating system of claim 1, wherein the PV/T employs a vacuum tube solar photovoltaic photo-thermal integrated module.
3. The PV/T coupled dual source heat pump building heating system of claim 1, wherein the control valve is an electrically operated control valve disposed in each system cycle.
4. The PV/T coupled double-source heat pump building heating system according to claim 2, wherein the PV/T is sequentially connected with a reverse control integrated machine and a power grid, the reverse control integrated machine is respectively connected with a high-temperature water source heat pump, a low-temperature air source heat pump, a heat storage pump, a source side pump and a tail end pump load through 380V alternating current buses, and direct current sent by the PV/T enters the reverse control integrated machine and is converted into alternating current high-temperature water source heat pump, low-temperature air source heat pump, heat storage pump, source side pump, tail end pump load or residual electricity enters the power grid; the PV/T photovoltaic power generation is carried out all the year round, and a mode of 'self-power-consumption and residual power surfing' is adopted.
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