CN113945013B - Energy supply system with solar heat collector and heat pump coupled and control method - Google Patents

Energy supply system with solar heat collector and heat pump coupled and control method Download PDF

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Publication number
CN113945013B
CN113945013B CN202111342889.8A CN202111342889A CN113945013B CN 113945013 B CN113945013 B CN 113945013B CN 202111342889 A CN202111342889 A CN 202111342889A CN 113945013 B CN113945013 B CN 113945013B
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channel
water
water tank
heat
valve
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CN113945013A (en
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周晋
郑志行
徐峰
刘宏成
肖坚
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Hunan University
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Hunan University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/04—Other domestic- or space-heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1078—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump and solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention relates to an energy supply system with a solar heat collector and a heat pump coupled and a control method. The first water tank and the second water tank are circularly connected through a heat transfer pipeline. The solar heat collector is circularly connected with the first heat exchanger through the heat collecting loop. The heat pump is connected with the first water tank through a first heat pump loop, and the heat pump is connected with the second water tank through a second heat pump loop. The first water tank is connected with the water end through a first hot water supply pipeline, and the second water tank is connected with the water end through a second hot water supply pipeline. The second heat exchanger is circularly connected with the fan coil through an energy supply pipeline. The first water tank is conveyed to the second water tank through solar energy collected by the solar thermal collector, so that the solar energy is fully utilized, and the energy consumption of hot water supply and heating is reduced; the system is coupled with the solar heat collector and the heat pump, so that the energy requirements of the building are met in transition seasons and cooling seasons, and the energy consumption of the system is reduced.

Description

Energy supply system with solar heat collector and heat pump coupled and control method
Technical Field
The invention relates to the technical field of buildings, in particular to an energy supply system with a solar heat collector and a heat pump coupled and a control method.
Background
Solar energy is a clean energy source and can be converted into electric energy or heat energy through a photovoltaic panel or a heat collector, wherein the heat collector is most widely applied in China. However, the utilization of solar energy is limited by factors such as region and time, and it is difficult to continuously and stably output heat, so that other heat sources are still needed to assist in meeting the annual hot water and heating requirements. The heat pump has the advantages of energy conservation, environmental protection and the like, is less influenced by regions, can convert low-grade renewable energy sources such as air energy, geothermal energy and the like into high-grade heat energy, and is widely applied to heating and cooling. The mode of coupling the heat pump with solar energy to realize hot water supply and heating is an efficient and clean energy utilization system.
The traditional building hot water supply and heating usually adopt two sets of independent systems, a solar energy coupling electric auxiliary heating system is adopted to prepare hot water in the heating season, a heat pump system is adopted to heat, but in most areas of China, the solar energy radiant quantity in the heating season is generally small, and solar energy is difficult to convert into high-grade heat energy, so that the hot water supply and heating energy consumption in the heating season is high. The parallel system of the heat collector and the heat pump also has the problems.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides an energy supply system and a control method for coupling a solar heat collector and a heat pump, which solves the technical problems that hot water supply cannot be combined with heating or cooling, and that the energy consumption of hot water supply, heating and cooling is high.
(II) technical scheme
In order to achieve the above object, the solar collector and heat pump coupled energy supply system of the present invention comprises: the system comprises a first water tank, a second water tank, a solar heat collector, a heat pump, a first heat exchanger, a second heat exchanger and a fan coil;
the first heat exchanger is arranged in the first water tank, and the second heat exchanger is arranged in the second water tank;
the first water tank and the second water tank are both connected with a tap water pipe, and the first water tank and the second water tank are circularly connected through a heat transfer pipeline;
the solar heat collector is circularly connected with the first heat exchanger through a heat collecting loop;
the heat pump is connected with the first water tank through a first heat pump loop; the heat pump is connected with the second water tank through a second heat pump loop;
the first water tank is connected with a water using tail end through a first hot water supplying pipeline, and the second water tank is connected with a water using tail end through a second hot water supplying pipeline;
the second heat exchanger and the fan coil are sequentially connected in a circulating mode through energy supply pipelines.
Optionally, the energy supply system further comprises: a first three-way valve and a second three-way valve;
the first three-way valve and the second three-way valve are respectively provided with an A channel, a B channel and a C channel, wherein the A channel and the B channel can be communicated with the C channel;
an outlet of the second water tank is connected with a channel A of the first three-way valve, an outlet of the first water tank is connected with a channel B of the first three-way valve, and a channel C of the first three-way valve is connected with an inlet of the heat pump through a second water pump;
the inlet of the second water tank is connected with the channel A of the second three-way valve, the inlet of the first water tank is connected with the channel B of the second three-way valve, and the channel C of the second three-way valve is connected with the outlet of the heat pump.
Optionally, the energy supply system further comprises: the third three-way valve, the first flow dividing valve, the second flow dividing valve, the first water mixing valve and the second water mixing valve;
the third three-way valve, the first flow dividing valve, the second flow dividing valve, the first water mixing valve and the second water mixing valve are all provided with a channel A, a channel B and a channel C, wherein the channel A and the channel B can be communicated with the channel C;
the outlet of the first water tank is connected with the channel C of the third three-way valve, and the inlet of the second water tank is connected with the channel B of the third three-way valve;
the channel A of the first water mixing valve is connected with the channel A of the third three-way valve, the channel B of the first water mixing valve is connected with the outlet of the second water tank, the channel C of the first water mixing valve is connected with the channel B of the second water mixing valve, and the channel C of the second water mixing valve is connected with the water using tail end;
and the channel C of the first flow dividing valve is connected with a tap water pipe, the channel B of the first flow dividing valve is connected with the inlet of the first water tank, the channel A of the first flow dividing valve is connected with the channel C of the second flow dividing valve, and the channel B of the second flow dividing valve is connected with the inlet of the second water tank.
Optionally, a fourth temperature monitoring device is arranged on a pipeline between the outlet of the first water tank and the C channel of the third three-way valve;
and a sixth temperature monitoring device is arranged on a pipeline between the outlet of the second water tank and the channel B of the first water mixing valve.
Optionally, a booster pump is arranged on a pipeline between the channel C of the first flow dividing valve and a tap water pipe;
and the channel A of the second shunt valve is connected with the channel A of the second mixing valve through a cold water supply pipeline.
Optionally, a fourth water pump and a seventh temperature monitoring device are arranged on a pipeline between the outlet of the second water tank and the inlet of the first water tank;
be provided with second expansion tank and third water pump on the energy supply pipeline, the second expansion tank with the third water pump all is located the export of second heat exchanger with on the pipeline between fan coil's the entry, just the exit linkage of third water pump fan coil's entry.
Optionally, a first water pump, a first expansion tank, a first temperature monitoring device and a second temperature monitoring device are arranged on the heat collection loop;
the second temperature monitoring device, the first expansion tank and the first water pump are all arranged on a pipeline between an outlet of the first heat exchanger and an inlet of the solar heat collector, and the first expansion tank is located at the upstream of the first water pump;
the second temperature monitoring device is arranged on a pipeline between the outlet of the solar heat collector and the inlet of the first heat exchanger.
Optionally, the energy supply system further comprises: a third temperature monitoring device and a fifth temperature monitoring device;
the third temperature monitoring device is arranged on the first water tank and used for monitoring the water temperature at the top of the first water tank;
and the fifth temperature monitoring device is arranged on the second water tank and is used for monitoring the water temperature at the top of the second water tank.
Optionally, the energy supply system further comprises: an electric auxiliary heating device disposed in the first water tank.
Further, the invention also provides a control method of an energy supply system with a solar heat collector coupled with a heat pump, which is applied to the energy supply system, and the control method comprises the following steps:
when the season is a heating season, the energy supply system operates in a first mode;
when the season is a transition season, the energy supply system operates in a second mode;
when the season is a cold season, the energy supply system operates in a third mode;
wherein:
in a first mode, the solar heat collection circuit, the second heat pump circuit, the second hot water supply pipeline, the energy supply pipeline and the heat transfer pipeline are communicated;
in the second mode, the solar heat collection loop, the first heat pump loop and the first hot water supply pipeline are communicated;
in the third mode, the solar heat collection circuit, the second heat pump circuit, the first hot water supply pipeline and the energy supply pipeline are communicated.
(III) advantageous effects
The system transmits the solar energy collected by the first water tank through the solar thermal collector to the second water tank, so that the solar energy is fully utilized, and the energy consumption of hot water supply and heating in a heating season is reduced; the system is coupled with the solar heat collector and the heat pump, so that the energy requirements of the building are met in transition seasons and cooling seasons, the energy consumption of the system is reduced, hot water supply and heating are realized, or the hot water supply and the cooling can be realized simultaneously through the system, the application range is wide, and the practicability is high.
Drawings
FIG. 1 is a schematic diagram of a solar collector and heat pump coupled power system of the present invention;
fig. 2 is a diagram of the open channels of the three-way valve, the flow dividing valve and the water mixing valve of the solar heat collector and heat pump coupled energy supply system in different operation modes;
FIG. 3 is a schematic diagram of a first mode of operation of the solar collector and heat pump coupled power system of the present invention;
FIG. 4 is a schematic diagram of a second mode of operation of the solar collector and heat pump coupled power system of the present invention;
FIG. 5 is a schematic diagram of a third mode of operation of the solar collector and heat pump coupled energy supply system of the present invention;
fig. 6 is a flow chart of a control method of the solar heat collector and heat pump coupled energy supply system of the invention.
[ description of reference ]
1: a solar heat collector;
2.1: a first temperature monitoring device; 2.2: a second temperature monitoring device; 2.3: a third temperature monitoring device; 2.4: a fourth temperature monitoring device; 2.5: a fifth temperature monitoring device; 2.6: a sixth temperature monitoring device; 2.7: a seventh temperature monitoring device;
3.1: a first heat exchanger; 3.2: a second heat exchanger;
4.1: a first expansion tank; 4.2: a second expansion tank;
5.1: a first water pump; 5.2: a second water pump; 5.3: a third water pump; 5.4: a fourth water pump;
6.1: a first water tank; 6.2: a second water tank;
7: a heat pump;
8.1: a first three-way valve; 8.2: a second three-way valve; 8.3: a third three-way valve;
9: a booster pump;
10.1: a first diverter valve; 10.2: a second diverter valve;
11.1: a first water mixing valve; 11.2: a second water mixing valve;
12: a fan coil;
13: ending with water;
14: an electric auxiliary heating device.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. In which the terms "upper", "lower", etc. are used herein with reference to the orientation of fig. 1.
For a better understanding of the above-described technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, the present invention provides an energy supply system in which a solar collector 1 is coupled to a heat pump 7, comprising: the solar water heater comprises a first water tank 6.1, a second water tank 6.2, a solar heat collector 1, a heat pump 7, a first heat exchanger 3.1, a second heat exchanger 3.2 and a fan coil 12. The first heat exchanger 3.1 is arranged in the first water tank 6.1, and the first heat exchanger 3.1 is used for exchanging heat with water in the first water tank 6.1. The second heat exchanger 3.2 is arranged in the second water tank 6.2, and the second heat exchanger 3.2 is used for exchanging heat with water in the second water tank 6.2. First water tank 6.1 and second water tank 6.2 all with water piping connection, and through heat transfer pipe circulation connection between first water tank 6.1 and the second water tank 6.2, carry out hydrologic cycle between first water tank 6.1 and the second water tank 6.2 when heating to realize the heat exchange between two water tanks, need not to set up heat exchanger, improved heat exchange efficiency, reduced the loss of heat energy simultaneously. The solar heat collector 1 is in circulating connection with the first heat exchanger 3.1 through a heat collecting loop, heat conducting media are filled in the heat collecting loop, solar energy is absorbed through the solar heat collector 1, the solar energy is converted into heat energy and then is transported to the first heat exchanger 3.1, and then water in the first water tank 6.1 is heated through the first heat exchanger 3.1. The heat pump 7 is connected with the first water tank 6.1 through a first heat pump loop, the heat pump 7 is preferably an air source heat pump 7, the heat pump 7 is connected with the second water tank 6.2 through a second heat pump loop, the heat pump 7 performs auxiliary heating on water in the first water tank 6.1 and the second water tank 6.2, hot water and hot energy supply is guaranteed when solar energy is lacked, and system stability is improved. The first water tank 6.1 and the second water tank 6.2 are connected in series and then are connected with the water end 13 through a first hot water supply pipeline, the first water tank 6.1 is connected with the water end 13 through a second hot water supply pipeline, and the second water tank 6.2 is connected with the water end 13 through a third hot water supply pipeline. The first water tank 6.1 and the second water tank 6.2 can jointly provide hot water for users, and can also individually provide hot water for users, and the water supply form is adjusted according to the requirements of the users and the change of seasons, so that the flexibility and the adaptability of the system are improved. The second heat exchanger 3.2 and the fan coil 12 are sequentially connected in a circulating manner through a first energy supply pipeline. The second heat exchanger 3.2 and the fan coil 12 are sequentially connected in a circulating manner through a second energy supply pipeline. The second heat exchanger 3.2 acquires the heat in the water tank and carries to fan coil 12, cooperates the fan through fan coil 12 and carries the heat to the building in, satisfies user's heating demand. Meanwhile, the second heat exchanger 3.2 can be connected with a radiator, and the radiator can supply heat for users in a radiation mode. The system transmits the solar energy collected by the first water tank 6.1 through the solar heat collector 1 to the second water tank 6.2, so that the solar energy is fully utilized, and the energy consumption of hot water supply and heating in a heating season is reduced; the system is coupled with the solar heat collector 1 and the heat pump 7, so that the energy requirement of the building is met in the transition season and the cooling season, and the energy consumption of the system is reduced.
Referring to fig. 1, the energy supply system for coupling the solar collector 1 with the heat pump 7 further comprises: a first three-way valve 8.1 and a second three-way valve 8.2. The first three-way valve 8.1 and the second three-way valve 8.2 are both provided with a channel a, a channel B and a channel C, wherein both the channel a and the channel B can communicate with the channel C. The channel A and the channel B can not be directly communicated, the channel A and the channel B can be independently opened and closed, A, B, C three connection modes exist between the channels, only the channel A is communicated with the channel C, only the channel B is communicated with the channel C, and both the channel A and the channel B are communicated with the channel C. The outlet of the second water tank 6.2 is connected with the channel A of the first three-way valve 8.1, the outlet of the first water tank 6.1 is connected with the channel B of the first three-way valve 8.1, and the channel C of the first three-way valve 8.1 is connected with the inlet of the heat pump 7 through the second water pump 5.2. The inlet of the second water tank 6.2 is connected with the channel A of the second three-way valve 8.2, the inlet of the first water tank 6.1 is connected with the channel B of the second three-way valve 8.2, and the channel C of the second three-way valve 8.2 is connected with the outlet of the heat pump 7. The first water tank 6.1, the channel B and the channel C of the first three-way valve 8.1, the second water pump 5.2, the heat pump 7 and the channel C and the channel B of the second three-way valve 8.2 are connected in sequence through a first heat pump loop in a circulating manner. The first water tank 6.1, the channel A and the channel C of the first three-way valve 8.1, the second water pump 5.2, the heat pump 7 and the channel C and the channel A of the second three-way valve 8.2 are connected in a circulating mode through the second heat pump loop.
Referring to fig. 1, the energy supply system for coupling the solar collector 1 with the heat pump 7 further comprises: a third three-way valve 8.3, a first diverter valve 10.1, a second diverter valve 10.2, a first mixing valve 11.1 and a second mixing valve 11.2. The third three-way valve 8.3, the first flow dividing valve 10.1, the second flow dividing valve 10.2, the first water mixing valve 11.1 and the second water mixing valve 11.2 are all provided with a channel A, a channel B and a channel C. The A channel and the B channel can be communicated with the C channel, the A channel and the B channel cannot be directly communicated, the A channel and the B channel can be independently opened and closed, A, B, C three connection modes exist between the channels, namely, only the A channel is communicated with the C channel, only the B channel is communicated with the C channel, and both the A channel and the B channel are communicated with the C channel. The outlet of the first tank 6.1 is connected to the C channel of the third three-way valve 8.3 and the inlet of the second tank 6.2 is connected to the B channel of the third three-way valve 8.3. The channel a of the first water mixing valve 11.1 is connected to the channel a of the third three-way valve 8.3, the channel B of the first water mixing valve 11.1 is connected to the outlet of the second water tank 6.2, the channel C of the first water mixing valve 11.1 is connected to the channel B of the second water mixing valve 11.2, and the channel C of the second water mixing valve 11.2 is connected to the water end 13. The channel C of the first diverter valve 10.1 is connected to the tap water pipe, the channel B of the first diverter valve 10.1 is connected to the inlet of the first water tank 6.1, the channel a of the first diverter valve 10.1 is connected to the channel C of the second diverter valve 10.2, and the channel B of the second diverter valve 10.2 is connected to the inlet of the second water tank 6.2. A fourth temperature detection device 2.4 is arranged on a pipeline between the outlet of the first water tank 6.1 and the channel C of the third three-way valve 8.3. A sixth temperature detection device 2.5 is arranged on a pipeline between the outlet of the second water tank 6.2 and the channel B of the first water mixing valve 11.1. The B and C channels of the first diverter valve 10.1, the B and C channels of the first water tank 6.1 and the third three-way valve 8.3, the second water tank 6.2, the B and C channels of the first water mixing valve 11.1, the B and C channels of the second water mixing valve 11.2 and the water using tail end 13 are sequentially connected through a first hot water supply pipeline, the B and C channels of the first diverter valve 10.1, the A and C channels of the first water tank 6.1 and the third three-way valve 8.3, the A and C channels of the first water mixing valve 11.1, the B and C channels of the second water mixing valve 11.2 and the water using tail end 13 are sequentially connected through a second hot water supply pipeline, the A and C channels of the first diverter valve 10.1, the B and C channels of the second diverter valve 10.2, the second water tank 6.2, the B and C channels of the first water mixing valve 11.1, the B and C channels of the second water mixing valve 11.2 and the water using tail end 13 are sequentially connected through a third hot water supply pipeline.
Referring to fig. 1, a booster pump 9 is provided on a pipe between the C channel of the first flow dividing valve 10.1 and the tap water pipe, and the booster pump 9 is used to increase the water pressure of the tap water, and of course, when the water pressure of the tap water is sufficient, the booster pump 9 may not be provided, or the booster pump 9 may not be activated. The channel a of the second diverter valve 10.2 is connected to the channel a of the second mixer valve 11.2 via a cold water supply line, which supplies cold water to the user, and the second mixer valve 11.2 adjusts the mixing ratio of the cold water and the hot water, thereby controlling the temperature of the water at the water end 13. The first water tank 6.1 and the second water tank 6.2 adopt a top water method, cold water is pushed to the bottom of the first water tank 6.1 by tap water pressure or a booster pump 9, hot water is pushed out from the top of the first water tank 6.1 and is pushed into the second water tank 6.2 through a water pipe, so that the hot water in the second water tank 6.2 is pushed into a water using end 13 from a pipeline, or a corresponding pump can be arranged for water conveying.
Referring to fig. 1, a fourth water pump 5.4 and a seventh temperature detecting device 2.7 are provided on the pipeline between the outlet of the second water tank 6.2 and the inlet of the first water tank 6.1. In the heating season, be high-temperature water in two water tanks, two water tanks homoenergetic continue to heat for user's heating and heat supply water, and at this moment, the low temperature water extraction in the fourth water pump 5.4 in the second water tank 6.2 continues to heat to first water tank 6.1, and the horizontal position of first water tank 6.1 should be higher than the horizontal height of second water tank 6.2, guarantees that the hydroenergy in the first water tank 6.1 can flow into in the second water tank 6.2 by oneself to realize the hydrologic cycle between two water tanks. And a second expansion tank 4.2 and a third water pump 5.3 are arranged on the energy supply pipeline, the second expansion tank 4.2 and the third water pump 5.3 are both positioned on the pipeline between the outlet of the second heat exchanger 3.2 and the inlet of the fan coil 12, and the outlet of the third water pump 5.3 is connected with the inlet of the fan coil 12. The water pump 5.4 pumps the lower, lower temperature water of the second tank 6.2 through the lower pipe to the first tank 6.1 and pushes the hot water at the top of the first tank 6.1 into the second tank 6.2 through the upper pipe.
Referring to fig. 1, the heat collecting loop is provided with a first water pump 5.1, a first expansion tank 4.1, a first temperature detection device 2.1 and a second temperature detection device 2.2. The solar water heater comprises a first heat exchanger 3.1, a second temperature detection device 2.2, a first expansion pipe, a first water pump 5.1, a solar heat collector 1 and the first temperature detection device 2.1 which are sequentially connected in a circulating mode through a heat collection loop, wherein the first temperature detection device 2.1 is located on a pipeline between an outlet of the solar heat collector 1 and an inlet of the first heat exchanger 3.1.
Referring to fig. 1, the energy supply system for coupling the solar collector 1 with the heat pump 7 further comprises: a third temperature detection means 2.3 and a fifth temperature detection means 2.5. The third temperature detection means 2.3 is arranged on the first water tank 6.1 for monitoring the water temperature at the top of the first water tank 6.1. A fifth temperature detection means 2.5 is arranged on the second water tank 6.2 for monitoring the water temperature at the top of the second water tank 6.2.
Referring to fig. 1, the energy supply system for coupling the solar collector 1 with the heat pump 7 further comprises: an electric auxiliary heating device 14, the electric auxiliary heating device 14 being arranged in the first water tank 6.1. The electric auxiliary heating device 14 provides additional heat energy supplement for the first water tank 6.1, so that the normal operation of the system is ensured when the natural heat energy is extremely deficient, and the stability of the system is further improved.
Further, the invention also provides a control method of an energy supply system with a solar heat collector coupled with a heat pump, which comprises the following steps: when the season is a heating season, the energy supply system operates in a first mode; when the season is a transition season, the energy supply system operates in a second mode; when the season is a cold season, the energy supply system operates in a third mode; in the first mode, the solar heat collection circuit, the second heat pump circuit, the second hot water supply pipeline, the energy supply pipeline and the heat transfer pipeline are communicated; in the second mode, the solar heat collection circuit, the first heat pump circuit and the first hot water supply pipeline are communicated; and in the third mode, the solar heat collecting loop, the second heat pump loop, the first hot water supply pipeline and the energy supply pipeline are communicated.
Specifically, referring to fig. 2-5, the system implements the following 3 different operation modes of the system according to the switching of the heat pump circuit and the hot water supply pipeline;
the mode I is a heating season operation mode, wherein a solar heat collection loop, a second heat pump loop, a second hot water supply pipeline, a cold water supply bypass, an energy supply pipeline and a heat transfer pipeline are communicated, the mode pipeline connection diagram is shown in figure 3, and the start-stop mode of each channel is shown in figure 2;
a second mode and a transition season operation mode, wherein the solar heat collection loop, the first heat pump loop, the first hot water supply pipeline and the cold water supply bypass are communicated, the connection diagram of the pipelines in the mode is shown in fig. 4, and the start-stop mode of each channel is shown in fig. 2;
and in the third mode, in the cold supply season operation mode, the solar heat collection loop, the second heat pump loop, the first hot water supply pipeline, the cold water supply bypass and the energy supply pipeline are communicated, the electric auxiliary heat device operates, the mode pipeline connection diagram is shown in fig. 5, and the start and stop modes of all the channels are shown in fig. 2.
In the system, the operation principles of the first water pump 5.1, the electric auxiliary heating device 14, the second water pump 5.2, the heat pump 7, the fourth water pump 5.4, the third water pump 5.3, the booster pump 9, the first flow dividing valve 10.1 and the second flow dividing valve 10.2 are as follows:
the start and stop of the first water pump 5.1 are controlled by the first temperature monitoring device 2.1, the second temperature monitoring device 2.2 and the third temperature monitoring device 2.3. The first water pump 5.1 is in a running state, and when the temperature read by the first temperature monitoring device 2.1 and the temperature read by the second temperature monitoring device 2.2 are both less than 2 ℃, or the temperature read by the third temperature monitoring device 2.3 is greater than 80 ℃, the first water pump 5.1 is forcibly turned off. The first water pump 5.1 is in a closed state, and when the temperature read by the first temperature monitoring device 2.1 and the temperature read by the second temperature monitoring device 2.2 are both greater than 8 ℃, and the temperature read by the third temperature monitoring device 2.3 is less than 80 ℃, the first water pump 5.1 is forcibly started.
The third temperature monitoring device 2.3 controls the electric auxiliary heating device 14 to be started through a system mode; when the system is in the third mode, the temperature 2.3 read by the third temperature monitoring device is greater than 48 ℃ and less than 52 ℃, the electric auxiliary heating device 14 is turned on, otherwise, the electric auxiliary heating device 14 is turned off.
The start and stop of the second water pump 5.2 and the heat pump 7 are controlled by the third temperature monitoring device 2.3 and the fifth temperature monitoring device 2.5; when the first heat pump loop is in operation, if the temperature read by the third temperature monitoring device 2.3 is greater than 48 ℃ and less than 52 ℃, the second water pump 5.2 and the heat pump 7 are turned on, otherwise, the second water pump 5.2 and the heat pump 7 are turned off. When the second heat pump loop operates, if the temperature 2.5 read by the fifth temperature monitoring device is higher than 5 ℃ and lower than 9 ℃, the second water pump 5.2 and the heat pump 7 are started, otherwise, the second water pump 5.2 and the heat pump 7 are closed;
the start and stop of the fourth water pump 5.4 are controlled through a system mode, the fourth temperature monitoring device 2.4 and the seventh temperature monitoring device 2.7, when the system is in the mode one, the temperature read by the fourth temperature monitoring device 2.4 and the temperature read by the seventh temperature monitoring device 2.7 are both smaller than 2 ℃, the fourth water pump 5.4 is closed, and when the temperature read by the fourth temperature monitoring device 2.4 and the temperature read by the seventh temperature monitoring device 2.7 are both larger than 8 ℃, the fourth water pump 5.4 is started.
The start and stop of the third water pump 5.3 are controlled through the fan coil 12, when the building has heating or cooling demands, the signal read by the fan coil 12 is 1, at the moment, the third water pump 5.3 is started, when the building does not have the heating and cooling demands, the signal read by the fan coil 12 is 0, and at the moment, the third water pump 5.3 is closed;
the starting and stopping of the booster pump 9 are controlled by the water tail end 13, when the building needs hot water supply, a signal read by the water tail end 13 is 1, the booster pump 9 is started at the moment, when the building does not need hot water supply, a signal read by the water tail end 13 is 0, and the booster pump 9 is closed at the moment;
the flow dividing proportion of the first flow dividing valve 10.1 and the second flow dividing valve 10.2 is controlled by a system mode, a fourth temperature monitoring device 2.4, a sixth temperature monitoring device 2.6 and the water supply temperature, wherein the A channel is opened when the A channel is communicated with the C channel, the B channel is opened when the B channel is communicated with the C channel, and otherwise, the channels are closed. When the system is in a mode one, the channel A of the first flow dividing valve 10.1 is closed, the channel B is opened, the channel A, B of the second flow dividing valve 10.2 is opened, and the second flow dividing valve 10.2 divides the connected channel A, B by the value of the temperature and the cold water temperature read by the sixth temperature monitoring device 2.6, so that the water supply tail end 13 stably outputs hot water at 45 ℃; when the system is in the second mode and the third mode, the A, B channel of the first diverter valve 10.1 is opened, the a channel of the second diverter valve 10.2 is opened, the B channel is closed, and the A, B channel of the first diverter valve 10.1 is shunted by the value of the temperature read by the fourth temperature monitoring device 2.4 and the cold water temperature, so that the water supply tail end 13 stably outputs hot water at 45 ℃.
The specific operation flow of the system refers to fig. 6, and the method comprises the following steps:
s0, starting;
s1, reading a system real-time power supply signal K, and a system power supply signal K1 for 10 continuous days. When the system has heating demand, K is 1, and the output season is the heating season; when the system has a cooling demand, K is equal to-1, and the output season is the cooling season; when the system has no cold supply and heating demand for 10 continuous days, K1 is 0, the output season is a transition season, and the process is switched to S2;
s2, judging whether the current season is a transition season, if so, turning to S3, and if not, turning to S6;
s3, the output system is in mode two, and the process goes to S4;
s4, opening a channel B of a first three-way valve, closing a channel A, opening a channel B of a second three-way valve, closing a channel A, opening a channel A of a third three-way valve, closing a channel B, opening a channel A, B of the first flow dividing valve, opening a channel A of the second flow dividing valve, closing a channel B, opening a channel A of the first water mixing valve, closing a channel B of the first water mixing valve, opening a channel A, B of the second water mixing valve, and turning to S5;
s5, ending;
s6, judging whether the current season is a cooling season, if so, turning to S7, and if not, turning to S10;
s7, the output system is in mode three, and the process goes to S8;
s8, opening a channel A and closing a channel B of a first three-way valve, opening a channel A and closing a channel B of a second three-way valve, opening a channel A and closing a channel B of a third three-way valve, opening a channel A, B of the first flow dividing valve, opening a channel A and closing a channel B of the second flow dividing valve, opening a channel A and closing a channel B of the first water mixing valve, closing a channel B of the second water mixing valve A, B, and turning to S9;
s9, ending;
s10, the output system is in a mode one, and the process goes to S11;
s11, opening a first three-way valve A channel and closing a second channel, opening a second three-way valve A channel and closing a second channel, opening a third three-way valve B channel and closing a channel A, opening a first flow dividing valve A channel and closing a channel B, opening a second flow dividing valve A, B channel, opening a first water mixing valve B channel and closing the channel A, opening a second water mixing valve A, B channel, and turning to S12;
and S12, ending.
The energy supply system outputs the heat of the first water tank 6.1 to the fan coil 12 and the water supply end through the first energy supply pipeline and the first hot water supply pipeline respectively according to the temperature of the first water tank 6.1, so that the solar energy is fully utilized, and the hot water supply and heating energy consumption in the heating season is reduced; the system is coupled with the solar heat collector 1 and the heat pump 7, so that the energy requirement of the building is met in the transition season and the cooling season, and the energy consumption of the system is reduced. Different operation modes are matched according to different seasons and water temperatures, so that the water supply tail end 13 is ensured to stably output hot water of 45 ℃, meanwhile, cooling or heating is supplied to the building, and hot water supply and heating are realized, or hot water supply and cooling can be realized simultaneously through the system.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims (9)

1. An energy supply system with a solar collector coupled to a heat pump, the energy supply system comprising: the system comprises a first water tank, a second water tank, a solar heat collector, a heat pump, a first heat exchanger, a second heat exchanger and a fan coil;
the first heat exchanger is arranged in the first water tank, and the second heat exchanger is arranged in the second water tank;
the first water tank and the second water tank are both connected with a tap water pipe, and the first water tank and the second water tank are circularly connected through a heat transfer pipeline;
the solar heat collector is circularly connected with the first heat exchanger through a heat collecting loop;
the heat pump is connected with the first water tank through a first heat pump loop; the heat pump is connected with the second water tank through a second heat pump loop;
the first water tank is connected with a water using tail end through a first hot water supplying pipeline, and the second water tank is connected with a water using tail end through a second hot water supplying pipeline;
the second heat exchanger is in circulating connection with the fan coil through an energy supply pipeline;
the energy supply system further includes: the third three-way valve, the first flow dividing valve, the second flow dividing valve, the first water mixing valve and the second water mixing valve;
the third three-way valve, the first flow dividing valve, the second flow dividing valve, the first water mixing valve and the second water mixing valve are all provided with a channel A, a channel B and a channel C, wherein the channel A and the channel B can be communicated with the channel C;
the outlet of the first water tank is connected with the channel C of the third three-way valve, and the inlet of the second water tank is connected with the channel B of the third three-way valve;
the channel A of the first water mixing valve is connected with the channel A of the third three-way valve, the channel B of the first water mixing valve is connected with the outlet of the second water tank, the channel C of the first water mixing valve is connected with the channel B of the second water mixing valve, and the channel C of the second water mixing valve is connected with the water using tail end;
and the channel C of the first flow dividing valve is connected with a tap water pipe, the channel B of the first flow dividing valve is connected with the inlet of the first water tank, the channel A of the first flow dividing valve is connected with the channel C of the second flow dividing valve, and the channel B of the second flow dividing valve is connected with the inlet of the second water tank.
2. The solar collector and heat pump coupled power system of claim 1, further comprising: a first three-way valve and a second three-way valve;
the first three-way valve and the second three-way valve are respectively provided with an A channel, a B channel and a C channel, wherein the A channel and the B channel can be communicated with the C channel;
an outlet of the second water tank is connected with a channel A of the first three-way valve, an outlet of the first water tank is connected with a channel B of the first three-way valve, and a channel C of the first three-way valve is connected with an inlet of the heat pump through a second water pump;
the inlet of the second water tank is connected with the channel A of the second three-way valve, the inlet of the first water tank is connected with the channel B of the second three-way valve, and the channel C of the second three-way valve is connected with the outlet of the heat pump.
3. The solar heat collector and heat pump coupled energy supply system of claim 1, wherein a fourth temperature monitoring device is arranged on a pipeline between the outlet of the first water tank and the C channel of the third three-way valve;
and a sixth temperature monitoring device is arranged on a pipeline between the outlet of the second water tank and the channel B of the first water mixing valve.
4. The energy supply system with the solar heat collector coupled with the heat pump as claimed in claim 1, wherein a booster pump is arranged on a pipeline between the C channel of the first flow dividing valve and a tap water pipe;
and the channel A of the second shunt valve is connected with the channel A of the second mixing valve through a cold water supply pipeline.
5. The solar heat collector and heat pump coupled energy supply system according to any one of claims 1-4, wherein a fourth water pump and a seventh temperature monitoring device are arranged on a pipeline between the outlet of the second water tank and the inlet of the first water tank;
be provided with second expansion tank and third water pump on the energy supply pipeline, the second expansion tank with the third water pump all is located the export of second heat exchanger with on the pipeline between fan coil's the entry, just the exit linkage of third water pump fan coil's entry.
6. The energy supply system with the solar heat collector coupled with the heat pump as claimed in any one of claims 1-4, wherein the heat collecting loop is provided with a first water pump, a first expansion tank, a first temperature monitoring device and a second temperature monitoring device;
the second temperature monitoring device, the first expansion tank and the first water pump are all arranged on a pipeline between an outlet of the first heat exchanger and an inlet of the solar heat collector, and the first expansion tank is located at the upstream of the first water pump;
the second temperature monitoring device is arranged on a pipeline between the outlet of the solar heat collector and the inlet of the first heat exchanger.
7. The solar collector and heat pump coupled power supply system of any one of claims 1-4, further comprising: a third temperature monitoring device and a fifth temperature monitoring device;
the third temperature monitoring device is arranged on the first water tank and used for monitoring the water temperature at the top of the first water tank;
and the fifth temperature monitoring device is arranged on the second water tank and is used for monitoring the water temperature at the top of the second water tank.
8. The solar collector and heat pump coupled power supply system of any one of claims 1-4, further comprising: an electric auxiliary heating device disposed in the first water tank.
9. A control method of a power supply system with a solar heat collector coupled with a heat pump, which is applied to the power supply system as claimed in any one of claims 1-8, characterized in that the control method comprises:
when the season is a heating season, the energy supply system operates in a first mode;
when the season is a transition season, the energy supply system operates in a second mode;
when the season is a cold season, the energy supply system operates in a third mode;
wherein:
in a first mode, the solar heat collection circuit, the second heat pump circuit, the second hot water supply pipeline, the energy supply pipeline and the heat transfer pipeline are communicated;
in the second mode, the solar heat collection loop, the first heat pump loop and the first hot water supply pipeline are communicated;
in the third mode, the solar heat collection circuit, the second heat pump circuit, the first hot water supply pipeline and the energy supply pipeline are communicated.
CN202111342889.8A 2021-11-12 2021-11-12 Energy supply system with solar heat collector and heat pump coupled and control method Active CN113945013B (en)

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US4167965A (en) * 1977-07-22 1979-09-18 Carrier Corporation Integral water-refrigerant-air heat exchange system
CN102221270B (en) * 2011-07-15 2012-09-05 中山市爱美泰电器有限公司 Device used for providing cool and warm as well as domestic hot water and adopting heat pump set linked with solar energy
CN105276833B (en) * 2015-11-10 2017-08-25 浙江大学 A kind of solar water heating system and heat pump heat refrigeration system and its method
CN107062473A (en) * 2017-03-10 2017-08-18 山东建筑大学 A kind of solar air source heat pumps combined supply system

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