CN106610068B - Solar airconditioning and phase-change accumulation energy integral system and its working method - Google Patents
Solar airconditioning and phase-change accumulation energy integral system and its working method Download PDFInfo
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- CN106610068B CN106610068B CN201611107025.7A CN201611107025A CN106610068B CN 106610068 B CN106610068 B CN 106610068B CN 201611107025 A CN201611107025 A CN 201611107025A CN 106610068 B CN106610068 B CN 106610068B
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/0014—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 cooling apparatus specially adapted for use in air-conditioning using absorption or desorption
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- 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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—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 cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F5/0021—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 cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using phase change material [PCM] for storage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—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 using natural energy, e.g. solar energy, energy from the ground using solar energy
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention discloses a kind of solar airconditionings and phase-change accumulation energy integral system, pass through integrated and control solar airconditioning and back-up system (heat pump cold and warm machine) connection, realize the seamless switching of solar energy and electric energy, have two kinds of operational modes: cooling in summer mode and winter heating mode, in system operation, preferentially utilize solar energy, and when solar energy is not enough to provide stabilization, when the lasting energy, heat pump cold and warm machine as back-up system can make up this deficiency, while back-up system initiation culture and runing time is effectively reduced, whole system operation is more energy saving, furthermore pass through phase transition thermal storage water tank, the auto accumulation heat and heat release function of phase-change material can be achieved, to effectively prevent first circulation pipeline to overheat；Solar airconditioning provided by the invention and phase-change accumulation energy integral system, phase change energy storage technology is combined with solar airconditioning technology, is the developmental primary innovation of air-conditioning technical, it will promote being widely applied for solar air-conditioner system.
Description
Technical field
The present invention relates to solar airconditioning and technical field of phase change energy storage, specifically a kind of solar airconditioning and phase-change accumulation energy
Integral system and its working method.
Background technique
Solar energy absorption type air conditioning system is to provide its hair using solar energy as main energy sources for heat energy drive type refrigeration machine
Hot water required for raw device, to achieve the purpose that the system of refrigeration.In the case where not needing refrigeration in winter, through solar energy plus
The hot water of heat directly can heat or provide domestic hot-water for user, realize the integration of solar cold and hot air-conditioning and water heater.Though
Right solar airconditioning technology has energy-saving and environment-friendly outstanding advantages, however, at present sun air-conditioning system extension process there is also
Following problems:
(1) stable operation of solar airconditioning usually requires configuration heat storage can and cold storage tank, currently used storage medium
For water.It is but generally existing following insufficient using water tank: first is that the bulky of water tank；Second is that the tank body of water tank
Security setting problem, if water inlet side is commonly installed high temperature and pressure heat storage can, there are certain risks；Third is that prevent water temperature rapid
Decline, it is very high to the thermal requirements of the tank body of water tank.
(2) solar energy resources have fluctuation, influence the continuity of solar airconditioning operation.Solar radiation is very high
When, it is limited by the volume of heat storage can, system cannot sufficiently store extra solar energy resources；Increase suddenly when there is user's load
Or when continuous rainy days, customer demand cannot be ensured by relying solely on solar energy system, need frequent starting auxiliary system at this time,
Increase energy consumption.
(3) refrigerating efficiency of solar airconditioning depends on hot water input temp.It is higher to input hot water temperature, unit refrigeration effect
Fruit is better.Currently, water tank existed general problem is: first is that water temperature will appear lamination, cannot maintain into unit
Equilibrium temperature causes refrigerator operation unstable；Second is that water belongs to sensible heat storage, the temperature change of energy storage capacity and energy storage and energy release
Range is directly proportional.Energy storage temperature is lower, and energy storage capacity is lower.When water temperature is incorporated into coolant-temperature gage lower than refrigeration machine minimum, this temperature
Hot water under degree cannot be utilized, and cause a large amount of amount of residual heat and energy waste.
To sum up, there is certain technical bottleneck in current solar air-conditioner system.To solve this problem, of the invention
It is proposed a kind of solar airconditioning and phase-change accumulation energy integral system and its working method.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, a kind of solar airconditioning and phase are provided
Become energy storage integrated system and its working method, passes through integrated and control solar airconditioning and back-up system (heat pump cold and warm machine)
The seamless switching of solar energy and electric energy is realized in connection, in system operation, preferentially utilizes solar energy, and works as solar energy not
When being enough to provide stable, the lasting energy, the heat pump cold and warm machine as back-up system can make up this deficiency, standby being effectively reduced
While with system initiation culture and runing time, whole system operation is more energy saving.
The technical scheme of the invention to solve the technical problem is: a kind of solar airconditioning and phase-change accumulation energy one
Change system, including solar thermal unit, phase transition thermal storage water tank, cooling supply unit, buffer tank and fan coil, the sun
Energy heat collection unit is connected by first circulation pipeline with the heat storage water tank, and heat accumulation disk is equipped in the heat storage water tank
Pipe, the heat storage water tank are connected by second circulation pipeline with the phase transition thermal storage water tank, the phase transition thermal storage water tank
Inside it is stored with phase-change material, the cooling supply unit includes cooling tower and BrLi chiller, and the cooling tower passes through the
Three circulation lines are connected with the BrLi chiller, and the heat storage water tank is through the 4th circulation line and the bromination
Lithium refrigeration unit is connected, and the heat storage water tank is connected through the 5th circulation line with the buffer tank, and the described the 4th follows
There is common pall, which is connected on the heat storage water tank, institute between endless tube road and the 5th circulation line
The BrLi chiller stated is connected through the 6th circulation line with the buffer tank, and the buffer tank is followed by the 7th
Endless tube road is connected with the fan coil, and the first circulation that frequency conversion is provided on the first circulation pipeline pumps P1, described
The 4th circulation line on be provided with second circulation pump P2, P2 is located at simultaneously on the 5th circulation line, the described the 6th
It is provided with third circulating pump P3 on circulation line, is provided with the 4th circulating pump P4 on the 7th circulation line, described
It is provided with the 5th circulating pump P5 on three circulation lines, the 6th circulating pump P6 is provided on the second circulation pipeline, it is described
First circulation pipeline, second circulation pipeline, third circulation line, the 4th circulation line, the 5th circulation line, the 6th circulation line
With if dry temperature sensor and several valves is respectively arranged on the 7th circulation line, when cooling in summer, solar thermal unit
Hot water is provided to BrLi chiller, BrLi chiller provides chilled water to buffer tank, and buffer tank is to fan unit
Pipe provides the required chilled water that freezes；When winter heating, solar thermal unit provides hot water to buffer tank, and buffer tank is aweather
Hot water needed for machine coil pipe provides heating.
Preferably, further including heat pump cold and warm machine, the buffer tank passes through the 8th circulation line and the heat pump
Air conditioner is connected, if being provided with the 7th circulating pump, dry temperature sensor and several valves on the 8th circulation line.
Preferably, the fusing point of the phase-change material is 75~95 DEG C.
Preferably, be provided with electric T-shaped valve S1 and air-cooled radiator on the first circulation pipeline, it is described too
Positive energy heat collection unit is connected with the heat storage water tank and the air-cooled radiator respectively through the electric T-shaped valve S1.
Preferably, the solar thermal unit include the first solar thermal collector group and second parallel with one another too
It is positive can heat collector group, temperature sensor T1 is installed on the outlet pipeline of the first solar thermal collector group, described the
Temperature sensor T2, the water outlet of the first solar thermal collector group are installed on the outlet pipeline of two solar thermal collector groups
The meet of the outlet pipeline of pipeline and the second solar thermal collector group is equipped with temperature sensor T3, and described first
The outlet pipeline of the outlet pipeline of solar thermal collector group and the second solar thermal collector group converge after through electric three passes
Valve S1 is communicated with the heat storage water tank and the air-cooled radiator respectively, and stream is equipped between S1 and the heat storage water tank
First expansion drum, the first pressure reducing valve J1 and ball valve are installed between quantity sensor F1 and ball valve V1, P1 and the heat storage water tank
Gate valve V20 is installed, the outlet pipeline of the air-cooled radiator and described the between V2, S1 and the air-cooled radiator
One circulation line is connected, and gate valve V19, P1 and first solar energy are equipped on the outlet pipeline of the air-cooled radiator
Temperature sensor T6 and temperature sensing are installed between heat collector group and the water inlet pipe road of the second solar thermal collector group
Device T7 is equipped with temperature sensor T4 and T5, the water inlet installation of the phase transition thermal storage water tank on the heat storage water tank
There is ball valve V17, the water outlet of the phase transition thermal storage water tank is equipped with ball valve V18, installs on the phase transition thermal storage water tank
There are temperature sensor T18 and T19, the heat storage water tank is successively installed on the water supply pipe of the BrLi chiller
There are P2 and ball valve V3, the BrLi chiller is sequentially installed with temperature biography on the water return pipeline of the heat storage water tank
One end close to the BrLi chiller of sensor T9 and ball valve V4, V3 and V4 are connected with electric T-shaped valve S2 respectively,
S2 is connected with the BrLi chiller simultaneously, on the common pall of the 4th circulation line and the 5th circulation line
P2, the second expansion drum, the second pressure reducing valve J2 and flow sensor F2 are installed, are provided with ball valve on the 5th circulation line
V7, ball valve V8 and third pressure reducing valve J3 are provided with temperature sensor T11, temperature sensor on the 6th circulation line
T10, ball valve V5 and ball valve V6, T10 and T11 are equipped with temperature on the BrLi chiller, the buffer tank
Sensor T14 and T15 are spent, is provided with temperature sensor T12, temperature sensor T13, ball valve on the third circulation line
V11 and ball valve V12, T12 and T13 are provided with temperature on the BrLi chiller, the 7th circulation line
Sensor T16, temperature sensor T17, flow sensor F3, ball valve V9 and ball valve V10 are arranged on the 8th circulation line
There are ball valve V13, ball valve V15 and ball valve V14, ball valve V16.
The working method of above-mentioned solar airconditioning and phase-change accumulation energy integral system, comprising the following steps:
When cooling in summer:
V1, V2, V3, V4, V5, V6, V9~V20 are opened, and V7, V8 are closed；
T1 or when T2 >=85 DEG C, P1 is opened, and solar thermal unit work, system enters collection thermal cycling profile；P1 is opened
And run after ten minutes, if 85 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, T1 and T2 < 80
DEG C, then P1 stops, and collection thermal cycling profile stops；
As 90 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank starts accumulation of heat；When T4≤88 DEG C or
At 2 DEG C of T4-T18 <, then P6 stops, and phase transition thermal storage water tank stops accumulation of heat；When T4≤75 DEG C and T18-T4 >=6 DEG C, then P6 is opened
It opens, phase transition thermal storage water tank starts heat release；As 80 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank stopping is put
Heat；
When T4 >=95 DEG C or T3 >=110 DEG C, S1 is switched to air-cooled radiator access, while air-cooled radiator is opened, and is
System opens high temperature protection mode；As 93 DEG C of T4 < or 105 DEG C of T3 <, S1 is switched to first circulation pipeline, while wind-cooling heat dissipating
Device is closed, and high temperature protection mode stops；
When T4 >=80 DEG C, P2 starting, and when generator temperature >=63 DEG C of BrLi chiller, lithium bromide refrigerator
Group is opened, and P3, P5 and P4 are opened, and cooling supply unit and fan coil work, solar thermal unit are mentioned to BrLi chiller
Supplying hot water, BrLi chiller provide chilled water to buffer tank, and buffer tank provides freezing needed for refrigeration to fan coil
Water, system open refrigeration cycle mode；When 70 DEG C of T4 <, alternatively, cooling supply unit stops when 18 DEG C of T15 > and fan coil starting
It only works, heat pump cold and warm machine starting, P7 is opened, and heat pump cold and warm machine freezes to fan coil cooling supply, fan coil；When T15≤15
DEG C or fan coil when stopping, P7 stops, and heat pump cold and warm machine stops working；
When winter heating:
V1, V2, V7, V8, V9, V10, V13~V20 are opened, and V3, V4, V5, V6, V11, V12 are closed；
T1 or when T2 >=50 DEG C, P1 is opened, and solar thermal unit work, system enters collection thermal cycling profile；P1 is opened
And run after ten minutes, if 50 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, T1 and T2 < 45
DEG C, then P1 stops, and collection thermal cycling profile stops；
As 60 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank starts accumulation of heat；When T4≤58 DEG C or
At 2 DEG C of T4-T18 <, then P6 stops, and phase transition thermal storage water tank stops accumulation of heat；When T4≤55 DEG C and T18-T4 >=4 DEG C, then P6 is opened
It opens, phase transition thermal storage water tank starts heat release；As 58 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank stopping is put
Heat；
As 62 DEG C of T4 > or 90 DEG C of T3 >, S1 is switched to air-cooled radiator access, while air-cooled radiator is opened, system
Open high temperature protection mode；When T4≤60 DEG C or T3≤88 DEG C, S1 is switched to first circulation pipeline, while air-cooled radiator closes
It closes, high temperature protection mode stops；
When 2 DEG C of T7 <, P1 is opened, and S1 is switched to air-cooled radiator access, and air-cooled radiator is closed, and system enters antifreeze
Circulation pattern；When T7 >=6 DEG C, P1 stops, and S1 is switched to first circulation pipeline, and antifreeze circulation pattern stops；
As 55 DEG C of T15 < and T4-T15 >=2 DEG C, P2, P4 and fan coil starting, system enter heat exchange cycle mode,
Solar thermal unit provides hot water, hot water needed for buffer tank provides heating to fan coil to buffer tank, and system is opened
Heating mode；As 45 DEG C of T15 < and when fan coil starts, heat pump cold and warm machine starting, P7 is opened, and heat pump cold and warm machine is to fan unit
Pipe heating, fan-coil heating；When T15 >=50 DEG C or fan coil stop, P7 stops, and heat pump cold and warm machine stops working.
Preferably, tap water subtracts through first when the first expansion drum measures the hydraulic pressure < 1.5MPa of first circulation pipeline
Pressure valve J1 is to first circulation pipeline moisturizing；When the first expansion drum measures hydraulic pressure >=2.0MPa of first circulation pipeline, first subtracts
Pressure valve J1 is closed；When the second expansion drum measures the hydraulic pressure < 1.5MPa of the 4th circulation line or the 5th circulation line, tap water
Through the second pressure reducing valve J2 to the 4th circulation line or the 5th circulation line moisturizing；When the second expansion drum measure the 4th circulation line or
When hydraulic pressure >=2.0MPa of the 5th circulation line, the second pressure reducing valve J2 is closed.
Preferably, as 5 DEG C of T1-T2 > or 110 DEG C of T3 >, the alarm of first circulation pipeline；When cooling in summer cyclic module
Under formula, at 95 DEG C of T4 >, heat storage water tank alarm；Under winter heat exchange cycle mode, at 62 DEG C of T4 >, heat storage water tank alarm.
Compared with the prior art, the advantages of the present invention are as follows: 1, provided by the invention solar airconditioning and phase-change accumulation energy one
Body system combines phase change energy storage technology with solar airconditioning technology, is the developmental primary innovation of air-conditioning technical, it will
Promote being widely applied for solar air-conditioner system.2, relative to traditional sensible heat energy-accumulating medium (such as water, salt water etc.), phase transformation
Energy storage material has the outstanding advantages that energy storage density is high, temperature change is small.Phase change energy storage technology is applied to solar energy by the present invention
The accumulation of heat end and cold-storage end of air-conditioning system, it is the characteristics of can solve solar energy intermittent, unstability, daytime (or fine day) is more
The remaining sun can be carried out storage, and (or rainy days) releases energy at night, realize the continuity of Solar use；Meanwhile in phase
In synthermal variation range, the energy storage density of phase-change material is 5~12 times of water, therefore, solar airconditioning of the present invention and phase transformation
The volume of existing water tank can be greatly lowered in the case where same stored energy capacitance in energy storage integrated system, save and use
Family space；And phase-changing energy storage material keeps temperature-resistant in thermal energy storage process, or varies less, and uses phase transformation at accumulation of heat end
Energy storage technology can stablize the temperature of refrigeration machine import hot water, significantly improve the operational efficiency of system, use phase transformation at cold-storage end
Energy storage technology can stablize chilled water temperature, improve the comfort that user uses.3, solar airconditioning and phase-change accumulation energy of the present invention
Integral system has two kinds of operational modes: cooling in summer mode and winter heating mode, passes through integrated and control solar energy
The seamless switching of solar energy and electric energy is realized in the connection of air-conditioning and back-up system (heat pump cold and warm machine), in system operation,
Preferentially using solar energy, and the heat pump cold and warm machine when solar energy is not enough to provide stable, the lasting energy, as back-up system
This deficiency can be made up, while back-up system initiation culture and runing time is effectively reduced, whole system runs more supernumerary segment
Energy.In addition, pass through phase transition thermal storage water tank, it can be achieved that phase-change material auto accumulation heat and heat release function, to effectively prevent first
Circulation line overheat.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of solar airconditioning and phase-change accumulation energy integral system in embodiment.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
The solar airconditioning of embodiment and phase-change accumulation energy integral system, as shown in Figure 1, include solar thermal unit 1,
Phase transition thermal storage water tank 2, cooling supply unit, buffer tank 4, fan coil 5 and heat pump cold and warm machine 6, solar thermal unit 1 pass through the
One circulation line 81 is connected with heat storage water tank 7, and heat accumulation coil pipe 71 is equipped in heat storage water tank 7, and heat storage water tank 7 passes through second circulation
Pipeline 82 is connected with phase transition thermal storage water tank 2, and phase-change material is stored in phase transition thermal storage water tank 2, and cooling supply unit includes cooling tower 32
With BrLi chiller 31, cooling tower 32 is connected by third circulation line 83 with BrLi chiller 31, heat storage water tank 7
It is connected through the 4th circulation line 84 with BrLi chiller 31, heat storage water tank 7 is through the 5th circulation line 85 and 4 phase of buffer tank
Even, there is common pall between the 4th circulation line 84 and the 5th circulation line 85, which is connected on heat storage water tank 7,
BrLi chiller 31 is connected through the 6th circulation line 86 with buffer tank 4, buffer tank 4 by the 7th circulation line 87 with
Fan coil 5 is connected, and the first circulation pump P1 of frequency conversion is provided on first circulation pipeline 81, is provided on the 4th circulation line 84
Second circulation pumps P2, and P2 is located on the 5th circulation line 85 simultaneously, and third circulating pump P3 is provided on the 6th circulation line 86, the
It is provided with the 4th circulating pump P4 on seven circulation lines 87, the 5th circulating pump P5, second circulation are provided on third circulation line 83
The 6th circulating pump P6, first circulation pipeline 81, second circulation pipeline 82, third circulation line the 83, the 4th are provided on pipeline 82
Several temperature are respectively arranged on circulation line 84, the 5th circulation line 85, the 6th circulation line 86 and the 7th circulation line 87
Sensor and several valves, buffer tank 4 are connected by the 8th circulation line 88 with heat pump cold and warm machine 6, the 8th circulation line 88
If the 7th circulating pump, dry temperature sensor and several valves are provided on；When cooling in summer, solar thermal unit 1 is to bromination
Lithium refrigeration unit 31 provides hot water, and BrLi chiller 31 provides chilled water to buffer tank 4, and buffer tank 4 is to fan unit
Pipe 5 provides the required chilled water that freezes；When winter heating, solar thermal unit 1 provides hot water, buffer tank 4 to buffer tank 4
Hot water needed for providing heating to fan coil 5.
In embodiments above, the fusing point of phase-change material is 75~95 DEG C, and selectable phase-change material is as follows:
| Title | Fusing point/DEG C | Enthalpy/(KJ/kg) |
| Trimethylolethane | 81-82 (freezing range: 75-73) | 155 |
| Arachic acid | 76.5 | 227 |
| Mg(NO3)2·6H2O | 89.9 | 167 |
| Acetamide | 82 |
In embodiments above, electric T-shaped valve S1 and air-cooled radiator 9, the sun are provided on first circulation pipeline 81
Energy heat collection unit 1 is connected with heat storage water tank 7 and air-cooled radiator 9 respectively through electric T-shaped valve S1.
In embodiments above, solar thermal unit 1 includes 11 He of the first solar thermal collector group parallel with one another
Second solar thermal collector group 12, is equipped with temperature sensor T1 on the outlet pipeline of the first solar thermal collector group 11, and second
Temperature sensor T2, the outlet pipeline of the first solar thermal collector group 11 are installed on the outlet pipeline of solar thermal collector group 12
Temperature sensor T3, the first solar thermal collector group are installed with the meet of the outlet pipeline of the second solar thermal collector group 12
11 outlet pipeline and the outlet pipeline of the second solar thermal collector group 12 converge after through electric T-shaped valve S1 respectively with water storage
Case 7 and air-cooled radiator 9 communicate, and flow sensor F1 and ball valve V1, P1 and heat storage water tank are equipped between S1 and heat storage water tank 7
It is equipped between 7 between first expansion drum 13, the first pressure reducing valve J1 and ball valve V2, S1 and air-cooled radiator 9 and gate valve is installed
The outlet pipeline of V20, air-cooled radiator 9 are connected with first circulation pipeline 81, are equipped with lock on the outlet pipeline of air-cooled radiator 9
Temperature is installed between valve V19, P1 and the first solar thermal collector group 11 and the water inlet pipe road of the second solar thermal collector group 12
Sensor T6 and temperature sensor T7 is equipped with temperature sensor T4 and T5 on heat storage water tank 7, and phase transition thermal storage water tank 2 enters water
Ball valve V17 is installed at mouthful, the water outlet of phase transition thermal storage water tank 2 is equipped with ball valve V18, is equipped on phase transition thermal storage water tank 2
Temperature sensor T18 and T19, heat storage water tank 7 are sequentially installed with P2 and ball valve on the water supply pipe of BrLi chiller 31
V3, BrLi chiller 31 be sequentially installed on the water return pipeline of heat storage water tank 7 temperature sensor T9 and ball valve V4, V3 and
One end of the close BrLi chiller 31 of V4 is connected with electric T-shaped valve S2 respectively, S2 simultaneously with BrLi chiller 31
It is connected, P2, the decompression of the second expansion drum 41, second is installed on the common pall of the 4th circulation line 84 and the 5th circulation line 85
Valve J2 and flow sensor F2 is provided with ball valve V7, ball valve V8 and third pressure reducing valve J3, the 6th circulation on the 5th circulation line 85
Temperature sensor T11, temperature sensor T10, ball valve V5 and ball valve V6, T10 and T11 are provided on pipeline 86 close to lithium bromide system
Cold group 31 is equipped with temperature sensor T14 and T15 on buffer tank 4, is provided with temperature sensor on third circulation line 83
T12, temperature sensor T13, ball valve V11 and ball valve V12, T12 and T13 are close to BrLi chiller 31, the 7th circulation line
Temperature sensor T16, temperature sensor T17, flow sensor F3, ball valve V9 and ball valve V10, the 8th circulation pipe are provided on 87
Ball valve V13, ball valve V15 and ball valve V14, ball valve V16 are provided on road 88.
The working method of above-mentioned solar airconditioning and phase-change accumulation energy integral system,
When cooling in summer:
V1, V2, V3, V4, V5, V6, V9~V20 are opened, and V7, V8 are closed；
T1 or when T2 >=85 DEG C, P1 is opened, and solar thermal unit 1 works, and system enters collection thermal cycling profile；P1 is opened
And run after ten minutes, if 85 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, T1 and T2 < 80
DEG C, then P1 stops, and collection thermal cycling profile stops；
As 90 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank 2 starts accumulation of heat；When T4≤88 DEG C or
At 2 DEG C of T4-T18 <, then P6 stops, and phase transition thermal storage water tank 2 stops accumulation of heat；When T4≤75 DEG C and T18-T4 >=6 DEG C, then P6 is opened
It opens, phase transition thermal storage water tank 2 starts heat release；As 80 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank 2 stops
Heat release；
When T4 >=95 DEG C or T3 >=110 DEG C, S1 is switched to 9 access of air-cooled radiator, while air-cooled radiator 9 is opened,
System opens high temperature protection mode；As 93 DEG C of T4 < or 105 DEG C of T3 <, S1 is switched to first circulation pipeline 81, while air-cooled
Radiator 9 is closed, and high temperature protection mode stops；
When T4 >=80 DEG C, P2 starting, and when bromine cooling machine generator temperature >=63 DEG C of BrLi chiller 31, bromination
Lithium refrigeration unit 31 is opened, and P3, P5 and P4 are opened, and cooling supply unit and fan coil 5 work, and solar thermal unit 1 is to bromination
Lithium refrigeration unit 31 provides hot water, and BrLi chiller 31 provides chilled water to buffer tank 4, and buffer tank 4 is to fan unit
Pipe 5 provides the required chilled water that freezes, and system opens refrigeration cycle mode；When 70 DEG C of T4 <, alternatively, 18 DEG C of T15 > and fan unit
When pipe 5 starts, cooling supply unit stops working, and heat pump cold and warm machine 6 starts, and P7 is opened, heat pump cold and warm machine 6 to 5 cooling supply of fan coil,
Fan coil 5 freezes；When T15≤15 DEG C or fan coil 5 stop, P7 stops, and heat pump cold and warm machine 6 stops working；
When winter heating:
V1, V2, V7, V8, V9, V10, V13~V20 are opened, and V3, V4, V5, V6, V11, V12 are closed；
T1 or when T2 >=50 DEG C, P1 is opened, and solar thermal unit 1 works, and system enters collection thermal cycling profile；P1 is opened
And run after ten minutes, if 50 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, T1 and T2 < 45
DEG C, then P1 stops, and collection thermal cycling profile stops；
As 60 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank 2 starts accumulation of heat；When T4≤58 DEG C or
At 2 DEG C of T4-T18 <, then P6 stops, and phase transition thermal storage water tank 2 stops accumulation of heat；When T4≤55 DEG C and T18-T4 >=4 DEG C, then P6 is opened
It opens, phase transition thermal storage water tank 2 starts heat release；As 58 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank 2 stops
Heat release；
As 62 DEG C of T4 > or 90 DEG C of T3 >, S1 is switched to 9 access of air-cooled radiator, while air-cooled radiator 9 is opened, and is
System opens high temperature protection mode；When T4≤60 DEG C or T3≤88 DEG C, S1 is switched to first circulation pipeline 81, while wind-cooling heat dissipating
Device 9 is closed, and high temperature protection mode stops；
When 2 DEG C of T7 <, P1 is opened, and S1 is switched to 9 access of air-cooled radiator, and air-cooled radiator 9 is closed, and system enters anti-
Freeze circulation pattern；When T7 >=6 DEG C, P1 stops, and S1 is switched to first circulation pipeline 81, and antifreeze circulation pattern stops；
As 55 DEG C of T15 < and T4-T15 >=2 DEG C, P2, P4 and fan coil 5 start, and system enters heat exchange cycle mode,
Solar thermal unit 1 provides hot water, hot water needed for buffer tank 4 provides heating to fan coil 5, system to buffer tank 4
Open heating mode；As 45 DEG C of T15 < and the starting of fan coil 5, heat pump cold and warm machine 6 starts, and P7 is opened, heat pump cold and warm machine 6
It heats to fan coil 5,5 heating of fan coil；When T15 >=50 DEG C or fan coil 5 stop, P7 stops, heat pump cold and warm machine 6
It stops working.
In above-mentioned solar airconditioning and the phase-change accumulation energy integral system course of work, followed when the first expansion drum 13 measures first
When the hydraulic pressure < 1.5MPa on endless tube road 81, tap water is through the first pressure reducing valve J1 to 81 moisturizing of first circulation pipeline；When the first expansion
When tank 13 measures hydraulic pressure >=2.0MPa of first circulation pipeline 81, the first pressure reducing valve J1 is closed；When the second expansion drum 41 measures
When the hydraulic pressure < 1.5MPa of four circulation lines 84 or the 5th circulation line 85, tap water is through the second pressure reducing valve J2 to the 4th circulation pipe
85 moisturizing of road 84 or the 5th circulation line；When the second expansion drum 41 measures the water of the 4th circulation line 84 or the 5th circulation line 85
When pressure >=2.0MPa, the second pressure reducing valve J2 is closed.As 5 DEG C of T1-T2 > or 110 DEG C of T3 >, first circulation pipeline 81 is alarmed；When
Under cooling in summer circulation pattern, at 95 DEG C of T4 >, heat storage water tank 7 is alarmed；Under winter heat exchange cycle mode, at 62 DEG C of T4 >,
Heat storage water tank 7 is alarmed.
Claims (7)
1. a kind of solar airconditioning and phase-change accumulation energy integral system, it is characterised in that: stored including solar thermal unit, phase transformation
Boiler, cooling supply unit, buffer tank, fan coil and heat pump cold and warm machine, the solar thermal unit are followed by first
Endless tube road is connected with heat storage water tank, and heat accumulation coil pipe is equipped in the heat storage water tank, and the heat storage water tank is followed by second
Endless tube road is connected with the phase transition thermal storage water tank, and phase-change material, the cooling supply are stored in the phase transition thermal storage water tank
Unit includes cooling tower and BrLi chiller, and the cooling tower passes through third circulation line and the lithium bromide refrigerating
Unit is connected, and the heat storage water tank is connected through the 4th circulation line with the BrLi chiller, the water storage
Case is connected through the 5th circulation line with the buffer tank, the 4th circulation line and the 5th circulation line it
Between there is common pall, which is connected on the heat storage water tank, and the BrLi chiller is through the 6th circulation
Pipeline is connected with the buffer tank, and the buffer tank is connected by the 7th circulation line with the fan coil,
It is provided with the first circulation pump P1 of frequency conversion on the first circulation pipeline, is provided with second on the 4th circulation line and follows
Ring pumps P2, and P2 is located at simultaneously on the 5th circulation line, is provided with third circulating pump P3 on the 6th circulation line,
It is provided with the 4th circulating pump P4 on 7th circulation line, is provided with the 5th circulating pump on the third circulation line
P5 is provided with the 6th circulating pump P6, the first circulation pipeline, second circulation pipeline, on the second circulation pipeline
If being respectively arranged on three circulation lines, the 4th circulation line, the 5th circulation line, the 6th circulation line and the 7th circulation line
Dry temperature sensor and several valves, the buffer tank are connected by the 8th circulation line with the heat pump cold and warm machine,
If being provided with the 7th circulating pump, dry temperature sensor and several valves on the 8th circulation line；When cooling in summer, the sun
Energy heat collection unit provides hot water to BrLi chiller, and BrLi chiller provides chilled water, buffered water to buffer tank
Case provides the required chilled water that freezes to fan coil；When winter heating, solar thermal unit provides hot water to buffer tank, delays
Hot water needed for waste preventer provides heating to fan coil.
2. a kind of solar airconditioning according to claim 1 and phase-change accumulation energy integral system, it is characterised in that: described
The fusing point of phase-change material is 75~95 DEG C.
3. a kind of solar airconditioning according to claim 1 and phase-change accumulation energy integral system, it is characterised in that: described
It is provided with electric T-shaped valve S1 and air-cooled radiator on first circulation pipeline, the solar thermal unit is through described electronic
Triple valve S1 is connected with the heat storage water tank and the air-cooled radiator respectively.
4. a kind of solar airconditioning according to claim 3 and phase-change accumulation energy integral system, it is characterised in that: described
Solar thermal unit includes the first solar thermal collector group and the second solar thermal collector group parallel with one another, and described first
Temperature sensor T1, the outlet pipe of the second solar thermal collector group are installed on the outlet pipeline of solar thermal collector group
Road is equipped with temperature sensor T2, the outlet pipeline of the first solar thermal collector group and the second solar energy collection
The meet of the outlet pipeline of hot device group is equipped with temperature sensor T3, the outlet pipeline of the first solar thermal collector group
After converging with the outlet pipeline of the second solar thermal collector group through electric T-shaped valve S1 respectively with the heat storage water tank
Communicated with the air-cooled radiator, be equipped between S1 and the heat storage water tank flow sensor F1 and ball valve V1, P1 with
First expansion drum, the first pressure reducing valve J1 and ball valve V2, S1 and the air-cooled radiator are installed between the heat storage water tank
Between gate valve V20 is installed, the outlet pipeline of the air-cooled radiator is connected with the first circulation pipeline, the wind
Gate valve V19 is installed, P1 and the first solar thermal collector group and described second are too on the outlet pipeline of cold heat sink
It is positive temperature sensor T6 and temperature sensor T7 to be installed between the water inlet pipe road of heat collector group, pacify on the heat storage water tank
Equipped with temperature sensor T4 and T5, the water inlet of the phase transition thermal storage water tank is equipped with ball valve V17, the phase-transition heat-storage
The water outlet of water tank is equipped with ball valve V18, and temperature sensor T18 and T19 are equipped on the phase transition thermal storage water tank, described
Heat storage water tank P2 and ball valve V3, the lithium bromide are sequentially installed on the water supply pipe of the BrLi chiller
Refrigeration unit is sequentially installed with leaning on for temperature sensor T9 and ball valve V4, V3 and V4 on the water return pipeline of the heat storage water tank
One end of the BrLi chiller is connected with electric T-shaped valve S2 respectively, S2 and meanwhile with the lithium bromide refrigerator
Group is connected, and P2 is equipped on the common pall of the 4th circulation line and the 5th circulation line, the second expansion drum, second is subtracted
Pressure valve J2 and flow sensor F2 is provided with ball valve V7, ball valve V8 and third pressure reducing valve J3, institute on the 5th circulation line
Temperature sensor T11, temperature sensor T10, ball valve V5 and ball valve V6 are provided on the 6th circulation line stated, T10 and T11 are leaned on
The BrLi chiller is equipped with temperature sensor T14 and T15 on the buffer tank, and the third is followed
Endless tube road is provided with temperature sensor T12, temperature sensor T13, ball valve V11 and ball valve V12, T12 and T13 close to described
BrLi chiller is provided with temperature sensor T16, temperature sensor T17, flow sensing on the 7th circulation line
Device F3, ball valve V9 and ball valve V10 are provided with ball valve V13, ball valve V15 and ball valve V14, ball valve on the 8th circulation line
V16。
5. the working method of a kind of solar airconditioning and phase-change accumulation energy integral system as claimed in claim 4, it is characterised in that:
The following steps are included:
When cooling in summer:
V1, V2, V3, V4, V5, V6, V9~V20 are opened, and V7, V8 are closed；
T1 or when T2 >=85 DEG C, P1 is opened, and solar thermal unit work, system enters collection thermal cycling profile；P1 is opened and is transported
It goes after ten minutes, if 85 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, 80 DEG C of T1 and T2 <, then and
P1 stops, and collection thermal cycling profile stops；
As 90 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank starts accumulation of heat；As T4≤88 DEG C or T4-
At 2 DEG C of T18 <, then P6 stops, and phase transition thermal storage water tank stops accumulation of heat；When T4≤75 DEG C and T18-T4 >=6 DEG C, then P6 is opened,
Phase transition thermal storage water tank starts heat release；As 80 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank stops heat release；
When T4 >=95 DEG C or T3 >=110 DEG C, S1 is switched to air-cooled radiator access, while air-cooled radiator is opened, and system is opened
Open high temperature protection mode；As 93 DEG C of T4 < or 105 DEG C of T3 <, S1 is switched to first circulation pipeline, while air-cooled radiator closes
It closes, high temperature protection mode stops；
When T4 >=80 DEG C, P2 starting, and when generator temperature >=63 DEG C of BrLi chiller, BrLi chiller is opened
It opens, P3, P5 and P4 are opened, and cooling supply unit and fan coil work, solar thermal unit provide heat to BrLi chiller
Water, BrLi chiller provide chilled water to buffer tank, and buffer tank provides the required chilled water that freezes to fan coil, is
System opens refrigeration cycle mode；When 70 DEG C of T4 <, alternatively, cooling supply unit stops work when 18 DEG C of T15 > and fan coil starting
Make, heat pump cold and warm machine starting, P7 is opened, and heat pump cold and warm machine freezes to fan coil cooling supply, fan coil；When T15≤15 DEG C or
When fan coil stops, P7 stops, and heat pump cold and warm machine stops working；
When winter heating:
V1, V2, V7, V8, V9, V10, V13~V20 are opened, and V3, V4, V5, V6, V11, V12 are closed；
T1 or when T2 >=50 DEG C, P1 is opened, and solar thermal unit work, system enters collection thermal cycling profile；P1 is opened and is transported
It goes after ten minutes, if 50 DEG C of T1 and T2 <, P1 stops, alternatively, P1 is opened and is run in 10 minutes, 45 DEG C of T1 and T2 <, then and
P1 stops, and collection thermal cycling profile stops；
As 60 DEG C of T4 > and T4-T18 >=4 DEG C, then P6 is opened, and phase transition thermal storage water tank starts accumulation of heat；As T4≤58 DEG C or T4-
At 2 DEG C of T18 <, then P6 stops, and phase transition thermal storage water tank stops accumulation of heat；When T4≤55 DEG C and T18-T4 >=4 DEG C, then P6 is opened,
Phase transition thermal storage water tank starts heat release；As 58 DEG C of T4 > or 2 DEG C of T18-T4 <, then P6 stops, and phase transition thermal storage water tank stops heat release；
As 62 DEG C of T4 > or 90 DEG C of T3 >, S1 is switched to air-cooled radiator access, while air-cooled radiator is opened, and system is opened
High temperature protection mode；When T4≤60 DEG C or T3≤88 DEG C, S1 is switched to first circulation pipeline, while air-cooled radiator is closed,
High temperature protection mode stops；
When 2 DEG C of T7 <, P1 is opened, and S1 is switched to air-cooled radiator access, and air-cooled radiator is closed, and system enters antifreeze circulation
Mode；When T7 >=6 DEG C, P1 stops, and S1 is switched to first circulation pipeline, and antifreeze circulation pattern stops；
As 55 DEG C of T15 < and T4-T15 >=2 DEG C, P2, P4 and fan coil starting, system enter heat exchange cycle mode, the sun
Energy heat collection unit provides hot water, hot water needed for buffer tank provides heating to fan coil to buffer tank, and system opens heating
Mode；As 45 DEG C of T15 < and fan coil starting, heat pump cold and warm machine starting, P7 is opened, and heat pump cold and warm machine is supplied to fan coil
It is warm, fan-coil heating；When T15 >=50 DEG C or fan coil stop, P7 stops, and heat pump cold and warm machine stops working.
6. the working method of a kind of solar airconditioning and phase-change accumulation energy integral system according to claim 5, feature
Be: when the first expansion drum measures the hydraulic pressure < 1.5MPa of first circulation pipeline, tap water is through the first pressure reducing valve J1 to first
Circulation line moisturizing；When the first expansion drum measures hydraulic pressure >=2.0MPa of first circulation pipeline, the first pressure reducing valve J1 is closed；When
When second expansion drum measures the hydraulic pressure < 1.5MPa of the 4th circulation line or the 5th circulation line, tap water is through the second pressure reducing valve J2
To the 4th circulation line or the 5th circulation line moisturizing；When the second expansion drum measures the 4th circulation line or the 5th circulation line
When hydraulic pressure >=2.0MPa, the second pressure reducing valve J2 is closed.
7. the working method of a kind of solar airconditioning and phase-change accumulation energy integral system according to claim 5, feature
It is: as 5 DEG C of T1-T2 > or 110 DEG C of T3 >, the alarm of first circulation pipeline；Under cooling in summer circulation pattern, 95 DEG C of T4 >
When, heat storage water tank alarm；Under winter heat exchange cycle mode, at 62 DEG C of T4 >, heat storage water tank alarm.
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| CN107763770B (en) * | 2017-09-27 | 2021-04-23 | 宁波大学 | Solar air conditioner and solar concentrated hot water combined system and energy allocation method thereof |
| CN108338582A (en) * | 2018-02-09 | 2018-07-31 | 张伯济 | Phase-change accumulation energy bedding system |
| CN109370897A (en) * | 2018-12-08 | 2019-02-22 | 内蒙古弘达生物环保科技有限责任公司 | A kind of biogas project heat source intelligent comprehensive utilizes system |
| CN111207434B (en) * | 2020-01-17 | 2021-11-16 | 四川省建筑设计研究院有限公司 | Solar energy coupling air source heat pump complementary heating system and control method |
| CN114623485A (en) * | 2022-03-17 | 2022-06-14 | 中航天建设工程集团有限公司 | Solar photovoltaic photo-thermal PVT and phase-change energy-storage coupling heat pump technology triple supply system |
| CN115773529A (en) * | 2022-12-05 | 2023-03-10 | 国网天津市电力公司 | Multi-energy complementary system and method for secondary heating of tail end of central heating system |
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