CN219103112U - Multi-energy coupling low-carbon energy supply system for existing communities in cold regions - Google Patents
Multi-energy coupling low-carbon energy supply system for existing communities in cold regions Download PDFInfo
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- CN219103112U CN219103112U CN202223016677.3U CN202223016677U CN219103112U CN 219103112 U CN219103112 U CN 219103112U CN 202223016677 U CN202223016677 U CN 202223016677U CN 219103112 U CN219103112 U CN 219103112U
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Abstract
The utility model discloses a multi-energy coupling low-carbon energy supply system for an existing community in a cold region, which comprises a solar heat collector, a water storage tank, a solar photovoltaic panel, a soil source heat pump unit, a heating side buried pipe heat exchanger and a cooling side buried pipe heat exchanger. In winter, the solar heat collector and the ground source heat pump are adopted to heat the indoor space of the existing community building, the ground source heat pump is utilized in summer to meet the air conditioning requirement of the existing community public building, and the heat of the abundant solar heat collector is stored in the soil in non-heating seasons, so that the problem of unbalanced soil heat throughout the year is solved. And the solar photovoltaic panel is used for generating power to supply power for the soil source heat pump unit and the user side of the existing community building, particularly the public building. The provided multi-energy coupling low-carbon energy supply system for the existing community in the cold region can furthest solve the problems of high energy consumption and high carbon emission of the current energy supply system for the existing community building on the premise of reducing the reconstruction cost of the heating and air conditioning terminal facilities of the existing community building as much as possible.
Description
Technical Field
The utility model belongs to the field of comprehensive utilization of multi-energy coupling, and particularly relates to a multi-energy coupling low-carbon energy supply system for an existing community in a cold region.
Background
The carbon emission generated by urban residential buildings in China accounts for over 40 percent of the carbon emission in the building industry. The community is used as a basic carrier for urban development, and the sustainable development of the community has important significance for realizing the 'double carbon' target in China and relieving social development contradiction. Currently, existing communities, particularly old communities, still have the problems of high building energy consumption and low indoor comfort. In the update and transformation of the existing community, single building throttling technical measures such as building envelope heat preservation and door and window update are mainly focused, and the renewable energy source such as solar energy and geothermal energy is not utilized enough and lacks systematic renewable energy source opening technical measures.
Solar energy has been used quite widely as clean renewable energy, and the main solar energy utilization devices are solar photovoltaic panels and solar collectors, but the solar energy is unstable, and other energy forms are needed as auxiliary energy.
The soil source heat pump has good environmental and economic benefits, but the soil source heat pump has the problem of unbalanced soil heat when applied to cold areas. The solar energy cross-season heat accumulation is adopted to supplement heat to the soil around the ground pipe of the soil source heat pump, so that the problem of unbalance of soil heat can be effectively solved, and meanwhile, the solar heat collector is utilized to assist the soil source heat pump in heating, and the energy efficiency of the system can be improved.
Disclosure of Invention
According to the multi-energy coupling low-carbon energy supply system for the existing communities in the cold regions, which is provided by the utility model, the solar heat collector is coupled with the soil source heat pump, the solar heat collector and the soil source heat pump are adopted to heat the indoor space of the existing community buildings in winter, the soil source heat pump is utilized to meet the air conditioning requirement of the public buildings of the existing communities in summer, and the heat of the abundant solar heat collector is stored in the soil in non-heating seasons, so that the problem of unbalanced soil heat throughout the year is solved. In addition, solar photovoltaic power generation is utilized to supply power consumption for the operation of the ground source heat pump and indoor power consumption of buildings, particularly commercial building parts. The provided multi-energy coupling low-carbon energy supply system for the existing communities in the cold regions can furthest exert the advantages of solar energy and a soil source heat pump on the premise of reducing the reconstruction cost of the facilities at the tail ends of the heating and air conditioning of the existing communities as much as possible, and can alleviate the problems of high energy consumption and high carbon emission of the existing communities.
In order to solve the technical problems, the utility model provides an existing community multi-energy coupling low-carbon energy supply system in a cold region, wherein the energy utilization form of an existing community building comprises electric energy, heat energy and cold energy; the multi-energy coupling low-carbon energy supply system comprises a solar heat collector, a water storage tank, a solar photovoltaic panel, a ground source heat pump unit, a heating side buried pipe heat exchanger and a cooling side buried pipe heat exchanger; coupling the solar heat collector with the soil source heat pump unit, and supplying power for the soil source heat pump unit and the user side of the existing community building through a power supply network by utilizing the power generation of the solar photovoltaic panel; the soil source heat pump unit comprises a compressor, a first heat exchanger, an expansion valve and a second heat exchanger, and the operation of the soil source heat pump unit is switched by a four-way reversing valve; the solar heat collector is connected with the heating side buried pipe heat exchanger; the heating side buried pipe heat exchanger and the cooling side buried pipe heat exchanger are connected with the first heat exchanger through pipelines, and the second heat exchanger is connected with heating/indoor air conditioning terminal equipment at the user side of the existing community building through pipelines; the solar heat collector is indirectly connected with the user side of the existing community building through the water storage tank; when the solar heat collector runs in winter, hot water in the solar heat collector exchanges heat with cold water in the water storage tank, and after the heat exchange, the hot water in the water storage tank supplies heat to heating terminal equipment at the user side of the existing community building; when the system runs in summer, cold water generated by heat exchange between working media of the soil source heat pump unit and backwater of indoor air conditioning terminal equipment in the user side of the community building is used for air conditioning the indoor of the user side of the existing community building.
Furthermore, the existing community multi-energy coupling low-carbon energy supply system provided by the utility model comprises the following components:
the compressor is connected with the working medium channel of the first heat exchanger and the working medium channel of the second heat exchanger through a four-way reversing valve, and the four-way reversing valve comprises a first channel ba, a second channel cd, a third channel da and a fourth channel cb, wherein: two ends of the first channel ba are respectively connected with an A port of the working medium channel of the second heat exchanger and an air suction port of the compressor; two ends of the second channel cd are respectively connected with an exhaust port of the compressor and an A port of the working medium channel of the first heat exchanger; two ends of the third channel da are respectively connected with an A port of the working medium channel of the first heat exchanger and an air suction port of the compressor; two ends of the fourth channel cb are respectively connected with an exhaust port of the compressor and an A port of the working medium channel of the second heat exchanger; the port B of the first heat exchanger working medium channel is connected with the port B of the second heat exchanger working medium channel through an expansion valve; in the winter running mode of the ground source heat pump unit, the fourth channel cb and the third channel da of the four-way reversing valve are both communicated, and the first channel ba and the second channel cd are both closed; in the summer operation mode of the ground source heat pump unit, the second channel cd and the first channel ba of the four-way reversing valve are both communicated, and the third channel da and the fourth channel cb are both closed.
The heating side buried pipe heat exchanger and the cooling side buried pipe heat exchanger are connected in parallel and then connected in series with a circulating water channel of the first heat exchanger through a pipeline; the circulating water channel of the second heat exchanger is connected with heating/indoor air conditioning terminal equipment at the user side of the existing community building in series.
The existing community building user comprises public buildings and residential buildings; the heating/indoor air conditioning terminal equipment of the user side of the existing community building comprises heating/indoor air conditioning terminal equipment of a public building, heating terminal equipment and indoor air conditioning equipment of a residential building, wherein the heating/indoor air conditioning terminal equipment of the public building is a fan coil, the heating terminal equipment of the residential building is a floor radiation system, and the indoor air conditioning equipment of the residential building is a split air conditioning unit.
The design of the system connecting pipeline is as follows:
the outlet of the circulating water channel of the first heat exchanger is respectively connected with a return pipe of the heating side buried pipe heat exchanger and a return pipe of the cooling side buried pipe heat exchanger through a three-way regulating valve L1, a stop valve V7 is arranged on the return pipe of the cooling side buried pipe heat exchanger, and a stop valve V8 is arranged on the return pipe of the heating side buried pipe heat exchanger; the water outlet pipe of the heating side buried pipe heat exchanger and the water outlet pipe of the cooling side buried pipe heat exchanger are connected in parallel and then connected with the inlet of a pump P2, the outlet of the pump P2 is connected to the inlet of the circulating water channel of the first heat exchanger, a stop valve V6 is arranged on the water outlet pipe of the cooling side buried pipe heat exchanger, and a stop valve V2 is arranged on the water outlet pipe of the heating side buried pipe heat exchanger;
the outlet of the circulating water channel of the second heat exchanger is connected with one end of a pipeline I, and a pump P3 is arranged on the pipeline I; the other end of the pipeline I is connected with a water inlet pipe of the floor radiation system and a water inlet pipe of the fan coil pipe respectively through a three-way joint, and a stop valve V5 is arranged on the water inlet pipe of the floor radiation system; a stop valve V9 is arranged on a return pipe of the floor radiation system; the water return pipe of the floor radiation system and the water return pipe of the fan coil are connected in parallel and then divided into two paths II and III through a three-way regulating valve L2, the two paths II are connected to a water return port of the water storage tank, a water outlet pipeline of the water storage tank is connected to an outlet pipe of the pump P3, and a pump P4 is arranged on a water outlet pipeline of the water storage tank; III is connected to the inlet of the circulating water channel of the second heat exchanger;
the water outlet of the solar heat collector is divided into an IV path and a V path, the IV path is connected to the inlet of the circulating pipe of the water storage tank, and the IV path is provided with a stop valve V1; the outlet of the circulating pipe of the water storage tank is connected to the water return port of the solar heat collector through a return pipe, and a pump P1 is arranged on the return pipe; the V-path is connected to the water inlet pipe of the heating side buried pipe heat exchanger and is positioned at the downstream of the stop valve V8; a stop valve V3 is arranged on the V path;
a pipeline VI is connected from the upstream of the stop valve V2 of the water outlet pipe of the heating side buried pipe heat exchanger to the upstream of the pump P1 of the solar heat collector return pipe, and the stop valve V4 is arranged on the pipeline VI.
In the winter operation mode, antifreeze is added into circulating water in the solar heat collector.
In the utility model, the solar photovoltaic panel is arranged on the roof or the facade of the existing community building, and the photovoltaic pavement power generation system is arranged in the ground parking lot; in sunny days, the solar photovoltaic panel and the photovoltaic pavement power generation system are used for running the soil source heat pump unit, and the daily power utilization of the user side of the existing community building, particularly the public building.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the multi-energy coupling low-carbon energy supply system for the existing communities in the cold regions, provided by the utility model, the solar heat collector is arranged on the roof of the building to supply heat for the building, so that the amount of consuming primary energy to supply heat for the indoor building is reduced, and meanwhile, the carbon emission is reduced.
(2) The solar photovoltaic panel is installed on the roof or the vertical face of the existing community building or the photovoltaic pavement power generation system is installed on the ground parking lot, so that the power consumption of the municipal power grid of the existing community is reduced, and the solar photovoltaic panel power generation system has the characteristics of economy and sustainability.
(3) The solar heat collector is coupled with the soil source heat pump, and the heat collected by the solar heat collector is stored in the soil through the buried pipe heat exchanger in non-heating seasons, so that the problem of unbalanced soil heat caused by the fact that the soil source heat pump takes heat from the soil in winter is solved.
(4) In winter, the soil source heat pump is used for heating the public buildings and residential buildings of the existing community simultaneously, the soil source heat pump in summer meets the indoor air conditioning requirement of the public buildings, and residential building users can adopt the split air conditioner unit to perform indoor air conditioning so as to reduce the reconstruction cost of heating and air conditioning terminal facilities of the residential buildings of the existing community.
Drawings
FIG. 1 is a schematic diagram of the structural connection of a solar energy coupled soil source heat pump unit;
fig. 2 is a schematic diagram of the operating principle of the ground source heat pump unit.
In the figure:
1-solar heat collector 2-water storage tank
4-solar photovoltaic panel of 3-ground source heat pump unit
5-public building 6-living building
71-cooling side buried pipe heat exchanger 72-heating side buried pipe heat exchanger
8-existing community building user 9-four-way reversing valve
10-compressor 11-first heat exchanger
12-expansion valve 13-second heat exchanger
P1 to P4 are all pumps V1 to V9 are all stop valves
L1 and L2 are three-way regulating valves
Detailed Description
The utility model will now be further described with reference to the accompanying drawings and specific examples, which are in no way limiting.
The existing community building user side 8 comprises a public building 5 and a residential building 6, and the energy utilization form mainly comprises electric energy, heat energy and cold energy. The heating/indoor air conditioning terminal equipment of the user side 8 of the existing community building comprises heating/indoor air conditioning terminal equipment of a public building 5, heating terminal equipment and indoor air conditioning equipment of a residential building 6, the heating/indoor air conditioning terminal equipment of the public building 5 is a fan coil, the heating terminal equipment of the residential building 6 is a floor radiation system with higher heat and mass utilization efficiency, and the indoor air conditioning equipment of the residential building 6 is a split air conditioning unit.
The utility model provides a cold area existing community multi-energy coupling low-carbon energy supply system, which mainly comprises a solar heat collector 1, a water storage tank 2, a solar photovoltaic panel 4, a soil source heat pump unit 3, a heating side ground heat exchanger 72 and a cooling side ground heat exchanger 71, as shown in figure 1; the solar heat collector 1 is coupled with the soil source heat pump unit 3, and the soil source heat pump unit 3 and the existing community building user side 8, particularly a commercial building part, are powered by utilizing the power generation of the solar photovoltaic panel 4 through a power supply network.
The soil source heat pump unit 3 can be determined to be formed by connecting one or more soil source heat pump units in parallel according to the cold and hot load of the existing community building in actual engineering and the specification of the existing soil source heat pump unit in the market, so as to meet the winter heating and summer air conditioning requirements of the user side 8 of the existing community building.
The solar heat collector 1 is indirectly connected with the user side 8 of the existing community building through the water storage tank 2, antifreeze is needed to be added into circulating water in the solar heat collector 1 to prevent icing in winter from affecting system operation, hot water in the solar heat collector 1 exchanges heat with cold water in the water storage tank 2, and when water in the water storage tank 2 reaches a certain temperature, heat is supplied to a room.
Fig. 2 shows the principle of operation of the ground source heat pump unit 3 of the present utility model. The ground source heat pump unit 3 includes a compressor 10, a first heat exchanger 11, an expansion valve 12, and a second heat exchanger 13. Working condition switching is performed through the four-way reversing valve 9, the compressor 10 is connected with the working medium channel of the first heat exchanger 11 and the working medium channel of the second heat exchanger 13 through the four-way reversing valve 9, the four-way reversing valve 9 comprises a first channel ba, a second channel cd, a third channel da and a fourth channel cb, wherein: two ends of the first channel ba are respectively connected with an A port of the working medium channel of the second heat exchanger 13 and an air suction port of the compressor 10; two ends of the second channel cd are respectively connected with an exhaust port of the compressor 10 and an A port of the working medium channel of the first heat exchanger 11; two ends of the third channel da are respectively connected with an A port of the working medium channel of the first heat exchanger 11 and an air suction port of the compressor 10; two ends of the fourth channel cb are respectively connected with an exhaust port of the compressor 10 and an A port of the working medium channel of the second heat exchanger 13; and the port B of the working medium channel of the first heat exchanger 11 is connected with the port B of the working medium channel of the second heat exchanger 13 through an expansion valve 12.
In winter mode of operation, the first heat exchanger 11 is an evaporator and the second heat exchanger 13 is a condenser. The fourth channel cb and the third channel da of the four-way reversing valve 9 are both communicated, and the first channel ba and the second channel cd are both closed; the exhaust port of the compressor 10 is connected with an A port (working medium inlet) of a channel of the second heat exchanger 13 through a fourth channel cb of the four-way reversing valve 9, the air suction port of the compressor 10 is connected with an A port (working medium outlet) of a working medium channel of the first heat exchanger 11 through a third channel da of the four-way reversing valve 9, and an B port (working medium inlet) of a working medium channel of the first heat exchanger 11 is connected with a working medium outlet of the second heat exchanger 13 through an expansion valve 12. The working medium inlet A of the second heat exchanger 13 is connected with the fourth channel cb of the four-way reversing valve 9. The high-temperature high-pressure working medium gas at the outlet of the compressor 10 flows in a pipeline, enters the second heat exchanger 13 through the fourth passage cb in the four-way reversing valve 9 to generate phase change to heat indoor circulating water, releases heat to the user side 8 of the existing community building through indoor heating terminal equipment, and is condensed into high-temperature high-pressure liquid while releasing heat, and becomes low-temperature low-pressure liquid through the expansion valve 12 to enter the first heat exchanger 11, and the water in the heating side buried pipe heat exchanger 72 and the cooling side buried pipe heat exchanger 71 absorbs heat from soil to evaporate the working medium flowing through the first heat exchanger 11, so that the working medium finally returns to the compressor through the third passage da in the four-way reversing valve to continue circulating.
The summer operation principle is substantially the same as the winter operation, and in the summer operation mode, the first heat exchanger 11 is a condenser and the second heat exchanger 13 is an evaporator. The second channel cd and the first channel ba of the four-way reversing valve 9 are both on, and the third channel da and the fourth channel cb are both off. The high-temperature high-pressure working medium gas at the outlet of the compressor 10 flows in a pipeline and enters the first heat exchanger 11 through the second channel cd in the four-way reversing valve 9 to release heat to the circulating water in the cold supply side buried pipe heat exchanger 71, the circulating water in the cold supply side buried pipe heat exchanger 71 is heated, the heat is stored in soil through the circulating water, after the working medium enters the expansion valve 12, the heat is absorbed at the second heat exchanger 13 to reduce the temperature of the indoor circulating water, the indoor circulating water is cooled through the indoor air conditioning terminal equipment, and the working medium finally returns to the compressor 10 through the first channel ba of the four-way reversing valve 9 to continue circulating.
As shown in fig. 1 and 2, the solar heat collector 1 is connected to the heating-side buried pipe heat exchanger 72; the heating side buried pipe heat exchanger 72 and the cooling side buried pipe heat exchanger 71 are connected in parallel and then connected in series with the circulating water channel of the first heat exchanger 11 through a pipeline; the outlet of the circulating water channel of the first heat exchanger 11 is respectively connected with a return pipe of the heating side buried pipe heat exchanger 72 and a return pipe of the cooling side buried pipe heat exchanger 71 through a three-way regulating valve L1, a stop valve V7 is arranged on the return pipe of the cooling side buried pipe heat exchanger 71, and a stop valve V8 is arranged on the return pipe of the heating side buried pipe heat exchanger 72; the water outlet pipe of the heating side buried pipe heat exchanger 72 and the water outlet pipe of the cooling side buried pipe heat exchanger 71 are connected in parallel and then connected with the inlet of the pump P2, the outlet of the pump P2 is connected to the inlet of the circulating water channel of the first heat exchanger 11, the water outlet pipe of the cooling side buried pipe heat exchanger 71 is provided with a stop valve V6, and the water outlet pipe of the heating side buried pipe heat exchanger 72 is provided with a stop valve V2. The circulating water passage of the second heat exchanger 13 is connected in series with the heating/indoor air conditioning terminal equipment of the user side 8 of the existing community building.
The outlet of the circulating water channel of the second heat exchanger 13 is connected with one end of a pipeline I, and a pump P3 is arranged on the pipeline I; the other end of the pipeline I is connected with a water inlet pipe of the floor radiation system and a water inlet pipe of the fan coil pipe respectively through a three-way joint, and a stop valve V5 is arranged on the water inlet pipe of the floor radiation system; a stop valve V9 is arranged on a return pipe of the floor radiation system; the water return pipe of the floor radiation system and the water return pipe of the fan coil are connected in parallel and then divided into two paths II and III through a three-way regulating valve L2, the path II is connected to a water return port of the water storage tank 2, a water outlet pipeline of the water storage tank 2 is connected to an outlet pipe of the pump P3, and a pump P4 is arranged on a water outlet pipeline of the water storage tank 2; and path iii is connected to the inlet of the circulating water passage of the second heat exchanger 13.
The water outlet of the solar heat collector 1 is divided into an IV path and a V path, the IV path is connected to the inlet of the circulating pipe of the water storage tank 2, and a stop valve V1 is arranged on the IV path; the outlet of the circulating pipe of the water storage tank 2 is connected to the water return port of the solar heat collector 1 through a return pipe, and a pump P1 is arranged on the return pipe; a V-path is connected to the water inlet pipe of the heating side buried pipe heat exchanger 72 and is positioned at the downstream of the stop valve V8; a stop valve V3 is arranged on the V path; a pipeline vi is connected from the upstream of the stop valve V2 of the water outlet pipe of the heating side ground heat exchanger 72 to the upstream of the pump P1 of the return pipe of the solar heat collector 1, and the pipeline vi is provided with a stop valve V4.
In the utility model, the two three-way regulating valves L1 and L2 are used for regulating and distributing water flow so as to maintain the normal operation of the system.
The solar heat collector 1 is arranged on the roof of an existing community building, and the operation mode for supplying energy to the existing community comprises a winter operation mode, a summer operation mode and a transition season operation mode.
1. Winter operation mode:
(1) The solar collector is independently powered:
when the hot water in the solar heat collector 1 can meet the building heat consumption, the stop valves V1, V5 and V9 are opened, other stop valves are closed, the pumps P1 and P4 are opened, and other pumps are closed; when the solar heat collector is installed on the roof of the existing community building, solar radiation is fully absorbed by the solar heat collector 1, hot water enters the circulating pipe of the water storage tank 2 from the water outlet of the solar heat collector 1 through the IV path after passing through the stop valve V1, water in the water storage tank 2 is heated and then flows back to the solar heat collector 1 through the pump P1 to absorb heat, when the water in the water storage tank 2 is heated to a certain temperature, the hot water in the water storage tank 2 enters the public building 5 and the residential building 6 of the user side 8 of the existing community building through the pump P4, heat is released indoors through respective heating terminal equipment to meet the indoor thermal comfort requirement, and the cooled return water returns to the water storage tank 2 again through the II path after passing through the three-way regulating valve L2 on the return pipe of the heating terminal equipment to be heated for the next circulation.
(2) The ground source heat pump unit is independently powered:
when the hot water temperature in the solar heat collector 1 cannot meet the heating hot water temperature requirement, opening the stop valve V2, the stop valve V5, the stop valve V6, the stop valve V7, the stop valve V8 and the stop valve V9, closing other stop valves, opening the pump P2 and the pump P3, and closing other pumps; the water in the heating side buried pipe heat exchanger 72 and the cooling side buried pipe heat exchanger 71 is used for displacing heat in soil, the water enters the soil source heat pump unit 3 through the pump P2, the cooled water respectively returns to the heating side buried pipe heat exchanger 72 and the cooling side buried pipe heat exchanger 71 after being distributed in a three-way regulating valve L1, the indoor circulating water enters the public building 5 and the living building 6 on the user side 8 of the existing community building through the pump P3 after being heated in the soil source heat pump unit 3, heat is released indoors through respective heating terminal equipment to meet the indoor thermal comfort requirement, and the cooled backwater returns to the soil source heat pump unit 3 again through a III path after passing through the three-way regulating valve L2 on a water return pipeline of the heating terminal equipment for heating for next circulation.
(3) Solar collector and soil source heat pump unit jointly supply energy:
when the hot water in the solar heat collector 1 cannot fully meet the building heat consumption, the stop valves V1, V2, V5, V6, V7, V8 and V9 are opened, the stop valves V3 and V4 are closed, and all pumps are started; the soil source heat pump unit 3 is started, the solar heat collector 1 heats water in the water storage tank 2 to a certain temperature after absorbing solar radiation, the water and hot water from the soil source heat pump unit 3 enter the public building 5 and the residential building 6 of the user side 8 of the existing community building together through the pump P4, heat exchange is carried out with the indoor through respective heating terminal equipment to meet the indoor heat comfort requirement, after the distribution flow of the cooled backwater is regulated through the three-way regulating valve L2, one part of backwater returns to the water storage tank 2 again through a II path to be heated for the next circulation, and the other part of backwater returns to the soil source heat pump unit 3 through a III path to continue heat exchange.
2. Summer cooling mode:
opening the stop valve V3, the stop valve V4, the stop valve V6, the stop valve V7, closing other stop valves, opening the pump P1, the pump P2 and the pump P3, and closing the pump P4; after absorbing solar radiation heat, water in the solar heat collector 1 directly enters the heating side buried pipe heat exchanger 72 through a V path through a stop valve V3 to store heat into soil, and the heat-exchanged water is pressurized by a pump P1 through a stop valve V4 and returns to the solar heat collector 1 to continuously absorb heat; the low-temperature water in the cold supply side ground heat exchanger 71 is heated in the soil source heat pump unit 3 through the stop valve V6 and the pump P2, the warmed water returns to the cold supply side ground heat exchanger 71 through the stop valve V7 to release heat to the soil for storage, the indoor circulating water is cooled in the soil source heat pump unit 3 and is cooled indoors through the indoor air conditioning terminal equipment of the public building 5 of the user side 8 of the existing community building, after the indoor thermal comfort requirement is met, the backwater enters the soil source heat pump unit 3 again through the III path for heat exchange through the three-way regulating valve L2, and circulation is completed.
3. Transition season mode of operation: only using the solar heat collector 1 to store heat for soil, opening the stop valve V3 and the stop valve V4, closing other valves, opening the pump P1, and closing other pumps; the water in the solar heat collector 1 absorbs solar radiation, then directly enters the heating side buried pipe heat exchanger 72 through a V path after passing through the stop valve V3, stores heat into soil, and the water after heat exchange is pressurized by the pump P1 through the stop valve V4 and returns to the solar heat collector 1 for continuous heat absorption.
According to the utility model, two sets of ground heat exchangers are adopted, so that the energy efficiency of the soil source heat pump in summer can be effectively improved, and the problem of heat unbalance of soil is solved. In summer, heat is stored in the soil through the heat supply side ground heat exchanger 71, while in non-heating season, surplus heat in the solar heat collector is stored in the soil through the heat supply side ground heat exchanger 72, and in winter, heat stored in the soil by the heat supply side ground heat exchanger 72 and the heat supply side ground heat exchanger 71 is simultaneously extracted, so that the soil cold and heat quantity is effectively balanced.
The solar photovoltaic panel 4 can be installed on the roof or the vertical face of the existing community building, and a photovoltaic pavement power generation system can be considered to be installed in an on-ground parking lot; in sunny days, the solar photovoltaic panel 4 and the photovoltaic pavement power generation system are used for running of the soil source heat pump unit 3 and daily power utilization of the user side 8 of the existing community building, particularly public buildings, so that more economic benefits are obtained while the load of a power grid is relieved, and power can be supplied through the power grid in rainy days when the output of the solar photovoltaic panel is low.
According to the utility model, solar energy is adopted to supplement heat to soil around the ground buried pipe of the soil source heat pump in a cross-season heat storage manner, so that the problem of unbalance of soil heat can be effectively solved, meanwhile, the solar energy is utilized to collect heat to assist the soil source heat pump in heating in winter, the soil source heat pump and the split air conditioner set are adopted to respectively air-condition public buildings and residential buildings in summer, the energy efficiency of the system can be improved, the transformation cost of heating and air-conditioning terminal facilities can be reduced, and the purpose of multi-energy coupling low-carbon energy supply of the existing communities in cold regions can be realized.
Although the utility model has been described above with reference to the accompanying drawings, the utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by those of ordinary skill in the art without departing from the spirit of the utility model, which fall within the protection of the utility model.
Claims (5)
1. The utility model relates to a cold area existing community multi-energy coupling low-carbon energy supply system, wherein the energy utilization form of the existing community building comprises electric energy, heat energy and cold energy; the method is characterized in that:
the multi-energy coupling low-carbon energy supply system comprises a solar heat collector (1), a water storage tank (2), a solar photovoltaic panel (4), a ground source heat pump unit (3), a heating side buried pipe heat exchanger (72) and a cooling side buried pipe heat exchanger (71);
the solar heat collector (1) is coupled with the soil source heat pump unit (3), and the power generation of the solar photovoltaic panel (4) is utilized to supply power for the soil source heat pump unit (3) and the existing community building user side (8) through a power supply network;
the soil source heat pump unit (3) comprises a compressor (10), a first heat exchanger (11), an expansion valve (12) and a second heat exchanger (13), and the operation of the soil source heat pump unit is switched by a four-way reversing valve (9);
the solar heat collector (1) is connected with the heating side buried pipe heat exchanger (72); the heating side buried pipe heat exchanger (72) and the cooling side buried pipe heat exchanger (71) are connected with the first heat exchanger (11) through pipelines, and the second heat exchanger (13) is connected with heating/indoor air conditioning terminal equipment of the user side (8) of the existing community building through pipelines;
the solar heat collector (1) is indirectly connected with the user side (8) of the existing community building through the water storage tank (2);
in a winter running mode, hot water in the solar heat collector (1) exchanges heat with cold water in the water storage tank (2), and the hot water in the water storage tank (2) supplies heat to heating terminal equipment at a user side (8) of an existing community building;
in a summer operation mode, cold water generated by heat exchange between working media of the soil source heat pump unit (3) and backwater of indoor air conditioning terminal equipment of a public building (5) in an existing community building user side (8) is used for air conditioning of the indoor of the public building (5) in the existing community building user side (8), and a residential building (6) adopts a split air conditioning unit for air conditioning of the indoor.
2. The community multi-energy coupling low-carbon energy supply system according to claim 1, wherein the compressor (10) is connected to the working medium channel of the first heat exchanger (11) and the working medium channel of the second heat exchanger (13) through a four-way reversing valve (9), the four-way reversing valve (9) comprises a first channel ba, a second channel cd, a third channel da and a fourth channel cb, wherein: two ends of the first channel ba are respectively connected with an A port of a working medium channel of the second heat exchanger (13) and an air suction port of the compressor (10); two ends of the second channel cd are respectively connected with an exhaust port of the compressor (10) and an A port of the working medium channel of the first heat exchanger (11); two ends of the third channel da are respectively connected with an A port of the working medium channel of the first heat exchanger (11) and an air suction port of the compressor (10); two ends of the fourth channel cb are respectively connected with an exhaust port of the compressor (10) and an A port of the working medium channel of the second heat exchanger (13); the port B of the working medium channel of the first heat exchanger (11) is connected with the port B of the working medium channel of the second heat exchanger (13) through an expansion valve (12);
in the winter running mode of the ground source heat pump unit (3), the fourth channel cb and the third channel da of the four-way reversing valve (9) are both communicated, and the first channel ba and the second channel cd are both closed;
under the summer operation mode, the second channel cd and the first channel ba of the four-way reversing valve (9) are both communicated, and the third channel da and the fourth channel cb are both closed.
3. The existing community multi-energy coupling low-carbon energy supply system according to claim 2, wherein the heating side ground heat exchanger (72) and the cooling side ground heat exchanger (71) are connected in parallel and then connected in series with the circulating water channel of the first heat exchanger (11) through a pipeline; the circulating water channel of the second heat exchanger (13) is connected in series with the heating/indoor air conditioning terminal equipment of the user side (8) of the existing community building.
4. An existing community multipotency coupling low-carbon energy supply system according to claim 3, wherein the existing community building user side (8) comprises public buildings (5) and residential buildings (6); the heating/indoor air conditioning terminal equipment of the user side (8) of the existing community building comprises heating/indoor air conditioning terminal equipment of a public building (5) and heating terminal equipment and indoor air conditioning equipment of a residential building (6), wherein the heating/indoor air conditioning terminal equipment of the public building (5) is a fan coil, the heating terminal equipment of the residential building (6) is a floor radiation system, and the indoor air conditioning equipment of the residential building (6) is a split air conditioning unit.
5. The multi-energy coupled low carbon energy system of claim 4, wherein the energy source is configured to provide energy to the existing community,
the outlet of the circulating water channel of the first heat exchanger (11) is respectively connected with a water return pipe of the heating side buried pipe heat exchanger (72) and a water return pipe of the cooling side buried pipe heat exchanger (71) through a three-way regulating valve L1, a stop valve V7 is arranged on the water return pipe of the cooling side buried pipe heat exchanger (71), and a stop valve V8 is arranged on the water return pipe of the heating side buried pipe heat exchanger (72); the water outlet pipe of the heating side buried pipe heat exchanger (72) and the water outlet pipe of the cooling side buried pipe heat exchanger (71) are connected in parallel and then connected with the inlet of the pump P2, the outlet of the pump P2 is connected to the inlet of the circulating water channel of the first heat exchanger (11), the water outlet pipe of the cooling side buried pipe heat exchanger (71) is provided with a stop valve V6, and the water outlet pipe of the heating side buried pipe heat exchanger (72) is provided with a stop valve V2;
the outlet of the circulating water channel of the second heat exchanger (13) is connected with one end of a pipeline I, and a pump P3 is arranged on the pipeline I; the other end of the pipeline I is connected with a water inlet pipe of the floor radiation system and a water inlet pipe of the fan coil pipe respectively through a three-way joint, and a stop valve V5 is arranged on the water inlet pipe of the floor radiation system; a stop valve V9 is arranged on a return pipe of the floor radiation system; the water return pipe of the floor radiation system and the water return pipe of the fan coil are connected in parallel and then divided into two paths II and III through a three-way regulating valve L2, the two paths II are connected to a water return port of the water storage tank (2), a water outlet pipeline of the water storage tank (2) is connected to an outlet pipe of the pump P3, and a pump P4 is arranged on a water outlet pipeline of the water storage tank (2); III is connected to the inlet of the circulating water channel of the second heat exchanger (13);
the water outlet of the solar heat collector (1) is divided into an IV path and a V path, the IV path is connected to the inlet of the circulating pipe of the water storage tank (2), and a stop valve V1 is arranged on the IV path; the outlet of the circulating pipe of the water storage tank (2) is connected to the water return port of the solar heat collector (1) through a return pipe, and a pump P1 is arranged on the return pipe; v-way is connected to the water inlet pipe of the heating side ground heat exchanger (72) and is positioned at the downstream of the stop valve V8; a stop valve V3 is arranged on the V path;
a pipeline VI is connected from the upstream of the stop valve V2 of the water outlet pipe of the heating side buried pipe heat exchanger (72) to the upstream of the pump P1 of the return pipe of the solar heat collector (1), and the stop valve V4 is arranged on the pipeline VI.
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| CN117091306A (en) * | 2023-10-18 | 2023-11-21 | 华清安泰能源股份有限公司 | Shallow geothermal energy thermal compensation method, system, terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117091306A (en) * | 2023-10-18 | 2023-11-21 | 华清安泰能源股份有限公司 | Shallow geothermal energy thermal compensation method, system, terminal and storage medium |
| CN117091306B (en) * | 2023-10-18 | 2023-12-26 | 华清安泰能源股份有限公司 | Shallow geothermal energy thermal compensation method, system, terminal and storage medium |
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