CN212930171U - Heating and heat supply dual-supply system for storing solar energy by utilizing ice-water mixture - Google Patents
Heating and heat supply dual-supply system for storing solar energy by utilizing ice-water mixture Download PDFInfo
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- CN212930171U CN212930171U CN202021815551.0U CN202021815551U CN212930171U CN 212930171 U CN212930171 U CN 212930171U CN 202021815551 U CN202021815551 U CN 202021815551U CN 212930171 U CN212930171 U CN 212930171U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The utility model relates to a heating and heat supply double supply system for storing solar energy by utilizing ice-water mixture, which comprises a solar energy storage system, a heat pump heating system, a water tank heating system and a heat preservation and storage water tank; wherein, heat preservation heat storage water tank includes heat preservation heat storage water tank upper strata and heat preservation heat storage water tank lower floor that separates heat each other, heat preservation heat storage water tank upper strata is used for storing hot water, heat preservation heat storage water tank lower floor is used for storing the frozen water mixture, just heat preservation heat storage water tank upper strata with be provided with the intercommunication pipeline between the heat preservation heat storage water tank lower floor, be provided with intercommunication pipeline control flap on this communicating pipeline. The system can ensure that the operation working condition of the heat pump in the heat pump heating system is unchanged, and the operation is always stable and efficient. In addition, the water in the inner space of the upper layer of the heat preservation and storage water tank can flow into the inner space of the lower layer, and gaps generated by the liquefaction of ice are filled, so that the occurrence of heat exchange deterioration caused by the gaps is prevented.
Description
Technical Field
The utility model relates to a clean energy and heating technical field, concretely relates to utilize ice water mixture to store heating and heat supply dual supply system of solar energy.
Background
At present, an air source heat pump system in winter can normally operate at the ambient temperature of more than 0 ℃, and the energy efficiency ratio of the system can be kept at a higher level. However, as the ambient temperature decreases, particularly when the ambient temperature is-15 degrees celsius or less, the evaporation temperature of the air source heat pump further decreases, the temperature difference of the system increases, the pressure ratio increases, the power consumption of the compressor increases, the efficiency decreases, and the energy efficiency ratio of the entire system also decreases. This not only results in poor heating effect of the system, but also further reduces the energy saving performance of the system. And the surface of an outdoor evaporator of the air source heat pump system is seriously frosted due to the excessively low ambient temperature, so that the system is not favorable for evaporation and heat absorption, and the use of the system is seriously restricted. Therefore, the use of the air source heat pump system is greatly limited in the areas with the average ambient temperature of about-15 ℃ at night in winter, such as Tibet and the like. But the Tibet region has abundant solar energy and can provide clean solar energy resources.
At present, a plurality of heat pump systems for heating by using solar energy exist, particularly, a solar direct expansion type heat pump system is a mature technology, but the application condition of the heat pump system is seriously limited, and heating at night cannot be realized. Therefore, some systems for storing solar energy for supplying heat have been derived, but these systems have numerous problems of expensive heat storage working medium, low heat storage density, heavy heat storage equipment, large performance fluctuation of the heat supply system caused by large temperature change in the heat storage and heat release processes, and attenuation of solid-gas heat exchange performance caused by gaps generated by ice water mixture heat storage when ice melts and stores heat, and the like, so that a novel technology is needed to solve the system for supplying heat by solar energy heat storage.
For this reason, there is a continuous need in the art to develop a heating and heating dual supply system that stores solar energy using an ice water mixture.
SUMMERY OF THE UTILITY MODEL
In order to make up the deficiency of the prior art, the purpose of this application lies in providing a heating and heat supply dual supply system that utilizes ice water mixture to store solar energy that operates stably high-efficient, heat exchange efficiency is high at first to solve the technical problem among the above-mentioned prior art.
By using water as a heat supply and energy storage medium, the solid-liquid phase change latent heat of the water is large, the energy storage density is high, a required water tank is small, and meanwhile, the water working medium is low in price, easy to obtain, and low in initial investment cost of equipment. Through heat preservation heat storage water tank, the upper water is heated temperature and risees and can be used for directly providing life hot water by keeping warm, and the aqueous phase of lower floor is out of shape into ice-water mixture and is used for the heat-retaining to be in the ice-water mixture state in the water tank of lower floor all the time, evaporation temperature when can be used for maintaining the heat pump heat supply is unchangeable, thereby guarantees that the operation operating mode of heat pump is unchangeable, and the operation is stable and high-efficient all the time. Use double-deck water tank, heat life hot water with solar collector collection's heat high temperature part in upper water tank, the low temperature part is used for the energy storage in lower water tank, reasonable use the solar energy of collection, satisfied the two demands that supply life hot water and heating simultaneously. And electric heating coil is equipped with in the upper strata of double-deck water tank, can carry out the flow of water working medium between the upper and lower two-layer, promotes the thermal exchange of upper and lower floor when solar energy is insufficient, and when solar energy heating frozen water mixture energy storage, the water in the upper strata can flow into the lower floor, compensaties because the space that the ice liquefaction brought, prevents because the appearance that the heat transfer that the space brought worsens.
In order to solve the above technical problem, the present application provides the following technical solutions.
In a first aspect, the present application provides a heating and heat supply dual-supply system for storing solar energy by using an ice-water mixture, wherein the heating and heat supply dual-supply system includes a solar energy storage system, a heat pump heating system, a water tank heating system and a heat preservation and storage water tank;
the heat preservation and storage water tank comprises a heat preservation and storage water tank upper layer and a heat preservation and storage water tank lower layer which are mutually insulated, wherein the heat preservation and storage water tank upper layer is used for storing hot water, the heat preservation and storage water tank lower layer is used for storing ice-water mixture, a communicating pipeline is arranged between the heat preservation and storage water tank upper layer and the heat preservation and storage water tank lower layer, and a communicating pipeline control valve is arranged on the communicating pipeline;
the solar energy storage system is used for absorbing solar energy and storing the solar energy in inner spaces of the upper layer and the lower layer of the heat-preservation and heat-storage water tank respectively through a mixture of water and ice water;
the heat pump heating system is used for releasing heat energy stored in the inner space of the lower layer of the heat-preservation and heat-storage water tank through an ice-water mixture;
and the water tank heat supply system is used for releasing heat energy stored in the inner space of the upper layer of the heat-preservation and heat-storage water tank through water.
In an embodiment of the first aspect, heat preservation and storage water tank still includes circulating water pump and circulation pipeline, circulation pipeline one end with heat preservation and storage water tank lower floor fluid intercommunication, one end with heat preservation and storage water tank upper strata fluid intercommunication, circulating water pump sets up in the circulation pipeline, and heat preservation and storage water tank lower floor with be provided with circulation outlet valve between the circulating water pump with be provided with circulation return water valve between the heat preservation and storage water tank upper strata.
In one embodiment of the first aspect, at least 10% of the inner volume of the inner space of the lower layer of the thermal storage water tank is not filled with the ice-water mixture.
In an embodiment of the first aspect, a heater is disposed in the inner space of the upper layer of the thermal insulation and storage water tank.
In one embodiment of the first aspect, the solar energy storage system comprises a solar thermal collector, a first liquid inlet pipe, a first heat storage coil, a first liquid outlet pipe and a circulation pump, which form a fluid circulation loop;
wherein the solar thermal collector is used for absorbing solar energy and heating water in a solar energy storage system;
the first heat storage coil comprises a liquid inlet and a liquid outlet and is arranged in the inner space of the lower layer of the heat preservation and heat storage water tank;
the first liquid inlet pipeline is provided with a first liquid inlet valve, and the first liquid inlet valve is arranged on a pipeline between the solar heat collector and the lower layer of the heat-preservation and heat-storage water tank;
wherein, be provided with first liquid valve and third liquid valve on the first drain pipe, first liquid valve sets up heat preservation and storage water tank lower floor with on the pipeline between the circulating pump, shown third liquid valve sets up the circulating pump with on the pipeline between the solar collector.
In an embodiment of the first aspect, the solar energy storage system further comprises a first bypass pipeline, the liquid inlet end of the first bypass pipeline is communicated with the first liquid inlet valve and the pipeline fluid between the lower layers of the heat preservation and storage water tank, the liquid outlet end of the first bypass pipeline is communicated with the first liquid outlet valve and the pipeline fluid between the circulating pumps, and the first bypass pipeline is provided with a bypass valve.
In one embodiment of the first aspect, the solar energy storage system further comprises a second liquid inlet line, a second heat storage coil, and a second liquid outlet line;
the second heat storage coil comprises a liquid inlet and a liquid outlet and is arranged in the inner space of the upper layer of the heat preservation and storage water tank;
one end of the second liquid inlet pipeline is in fluid communication with the solar thermal collector, and the other end of the second liquid inlet pipeline is in fluid communication with the second heat storage coil pipe;
one end of the second liquid outlet pipe is communicated with a liquid outlet fluid of the second heat storage coil pipe, one end of the second liquid outlet pipe is communicated with a first liquid inlet valve and a pipeline fluid between the lower layers of the heat preservation and storage water tank, and the second liquid outlet pipe is provided with a second liquid outlet valve.
In one embodiment of the first aspect, the heat pump heating system comprises an evaporator coil, a low temperature vapor line, a compressor, a high temperature vapor line, an indoor radiator, a high temperature return line, a flash tank, and a return line forming a fluid circulation loop;
the evaporation coil comprises an inlet and an outlet and is arranged in the inner space of the lower layer of the heat-preservation and heat-storage water tank;
wherein the low temperature vapor line is disposed between the evaporator coil outlet and the compressor, the high temperature vapor line is disposed between the compressor and the indoor radiator, the high temperature return line is disposed between the indoor radiator and the flash tank, and the return line is disposed between the flash tank and the evaporator coil inlet;
an air supplement pipeline is arranged between the flash tank and the compressor and used for supplementing saturated gas into the compressor;
and a first throttling valve is arranged on the high-temperature liquid return pipeline, and a second throttling valve is arranged on the liquid return pipeline.
In an embodiment of the first aspect, the heating system include with heat preservation heat storage tank upper strata fluid intercommunication's outlet pipe way and return water pipeline, outlet pipe way is used for following heat preservation heat storage tank upper strata is to user's transport hot water, the return water pipeline be used for to heat preservation heat storage tank upper strata make-up water, be provided with outlet valve on the outlet pipe way, just be provided with return water valve on the return water pipeline.
In an embodiment of the first aspect, the heating and heating dual-supply system for storing solar energy by using an ice-water mixture further includes a wireless temperature sensor and a controller, which are in communication with each other, the wireless temperature sensor is disposed in the internal space of the lower layer of the thermal insulation and heat storage tank and is used for measuring the temperature of the ice-water mixture, and the controller is configured to adjust the heat input or the cold input in the internal space of the lower layer of the thermal insulation and heat storage tank based on a temperature signal of the wireless temperature sensor.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. sufficient solar energy in daytime is collected by using the solar heat collector, and the solar energy is stored for heat supply of the heat pump system in low-temperature environment at night, so that clean and sustainable solar energy is effectively utilized, especially in places where solar energy is sufficiently charged in winter such as Tibet, the environment is protected, and the effects of energy conservation and emission reduction are achieved.
2. Sufficient solar energy in daytime is collected by using a solar heat collector, natural working medium water is used as a heat storage working medium for storing the solar energy, heat is stored and released by utilizing phase change latent heat of water converted between solid and liquid, the freezing point and the melting point of the water are 0 ℃ under normal pressure, the evaporation temperature of a heat pump system is effectively increased, the pressure ratio and the power consumption of the system are reduced, and the efficient and stable operation of the system is ensured.
3. The solar energy stored in the phase change heat reservoir in the daytime is used for supplying heat at night, so that the problems that the frosting of an evaporator is serious, the heat supply amount is reduced, the heat supply effect is poor and the energy efficiency of a system is reduced when an air source heat pump system directly absorbs heat from the air and evaporates at night in an extreme low-temperature environment are effectively solved.
4. The natural working medium water is used as the heat storage working medium for storing the solar energy, and the natural working medium water exists in a large amount in nature.
5. By using natural working medium water as a working medium for storing solar energy, the phase change latent heat of the natural working medium water is large when solid and liquid are converted, the required heat storage working medium is small in mass, the phase change heat reservoir is small in size, the occupied area is small, and the complexity of a system and the equipment installation difficulty are reduced.
6. By using natural working medium water as the heat storage working medium for storing solar energy, the natural working medium water has no dangerous attributes such as toxicity, flammability, explosiveness and the like, and can not cause any safety problem when being used as the heat storage working medium to leak in any state, thereby having good safety.
7. By using natural working medium water as the working medium for storing solar energy, the chemical property of the natural working medium water is very stable, and the decomposition problem caused by long-term use of other working media does not exist.
8. By using the small-temperature-difference terminal fan coil as the indoor radiator, the condensation temperature and pressure of the heat pump system are reduced, the pressure ratio and power consumption of the system are effectively reduced, the system performance is improved, and the efficient and stable operation of the system is ensured.
9. By using the heat preservation and storage water tank, the water on the upper layer of the water tank is heated and preserved heat to be used for directly providing domestic hot water, and the water on the lower layer of the water tank is always kept at 0 ℃ to be subjected to phase change to form an ice-water mixture for heat storage and heat release.
10. Through using heat preservation heat storage water tank, heat life hot water is heated with the heat high temperature part that solar collector collected in the water tank upper strata, and the low temperature part is used for the energy storage in the water tank lower floor, and the reasonable solar energy of having used the collection has satisfied the two demands that supply life hot water and heating simultaneously.
11. Through using heat preservation heat storage water tank, can carry out working medium exchange and heat exchange between the water working medium that water tank upper strata and lower floor were used for heat supply and energy storage, compensate water tank lower floor because the space that the ice liquefaction brought, prevent because the appearance that the heat transfer that the space brought worsens, guaranteed the high efficiency of water tank lower floor heat-retaining process.
Drawings
The present application may be better understood by describing embodiments thereof in conjunction with the following drawings, in which:
fig. 1 is a schematic diagram of a heating and heating dual supply system for storing solar energy by using an ice-water mixture according to an embodiment of the present application.
The reference numerals in the drawings have the following meanings:
11. indoor radiator
12. High-temperature liquid return pipeline
13. First throttle valve
14. Flash tank
15. Liquid return pipeline
16. Second throttle valve
17. Evaporation coil
18. Low temperature steam pipeline
19. Compressor with a compressor housing having a plurality of compressor blades
20. High temperature steam pipeline
21. Air supplement pipeline
31. First heat storage coil pipe
32. Circulating pump
33. Third liquid outlet valve
34. First liquid outlet pipeline
35. Solar heat collector
36. Second liquid inlet valve
37. Second liquid inlet pipeline
38. Second liquid outlet valve
39. Second heat storage coil
40. Second liquid outlet pipeline
41. First liquid inlet valve
42. First liquid inlet pipeline
43. Bypass valve
44. First bypass pipeline
45. First liquid outlet valve
51. Heat preservation and storage water tank
52. Electric heating coil
53. Water return valve
54. Water outlet valve
55. Water return pipeline
56. Water outlet pipeline
57. Circulating water return valve
58. Circulation pipeline
59. Circulating water pump
60. Circulating water outlet valve
61. Communicating pipeline
And 62, a communication pipeline control valve.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs.
All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. 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 otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It is noted that in the detailed description of these embodiments, in order to provide a concise description, all features of an actual implementation may not be described in detail.
Referring to fig. 1, in an embodiment, the present invention provides a heating and heating dual-supply system for storing solar energy by using ice-water mixture, which mainly comprises a solar energy storage system, a heat pump heating system, a water tank heating system and a heat preservation and storage water tank 51.
The solar energy storage system, the heat pump heating system and the water tank heating system are connected through the heat preservation and storage water tank 51 to realize heat exchange. In one embodiment, the thermal storage water tank 51 may be a double-layer thermal storage water tank. The heat preservation and storage water tank 51 comprises an upper hot water heat preservation layer of the heat preservation and storage water tank 51 and a lower ice-water mixture heat storage layer of the heat preservation and storage water tank 51 which are mutually heat-insulated. The upper hot water insulation layer of the heat insulation and storage water tank 51 is used for storing hot water and has sufficient water quantity. The lower ice-water mixture heat storage layer of the heat preservation and heat storage water tank 51 is used for storing ice-water mixture, and at least 10% of the inner volume of the lower inner space of the heat preservation and heat storage water tank 51 is not filled with the ice-water mixture, so that equipment is prevented from being damaged by expansion when water is completely solidified into ice. For example, in one embodiment, at least 20%, 30%, 40%, or even 50% of the internal volume of the lower internal space of the insulated hot water storage tank 51 is not filled with the ice-water mixture.
In one embodiment, the upper layer of the thermal storage water tank 51 and the lower layer of the thermal storage water tank 51 are separated by a thermally insulating separation layer. A communicating pipeline 61 is arranged in the water tank separating layer and used for connecting the upper layer of the heat-preservation and heat-storage water tank 51 with the lower layer of the heat-preservation and heat-storage water tank 51, and a communicating pipeline control valve 62 is arranged on the communicating pipeline 61.
In an embodiment, the heat preservation and storage water tank 51 further includes a circulating water pump 59 and a circulating pipeline 58, one end of the circulating pipeline 58 is communicated with the lower layer of the heat preservation and storage water tank 51, one end of the circulating pipeline is communicated with the upper layer of the heat preservation and storage water tank 51, the circulating water pump 59 is arranged in the circulating pipeline 58, the heat preservation and storage water tank 51 is arranged on the lower layer of the circulating water pump 59, and a circulating water outlet valve 60 is arranged between the circulating water pump 59 and the upper layer of the heat preservation and storage water tank 51.
In one embodiment, a heater is disposed in the inner space of the upper layer of the thermal insulation and heat storage water tank 51. In a preferred embodiment, the heater is an electric heater coil 52.
In one embodiment, the solar energy storage system includes a first heat storage coil 31, a circulation pump 32, a third liquid outlet valve 33, a first liquid outlet pipe 34, a solar heat collector 35, a second liquid inlet valve 36, a second liquid inlet pipe 37, a second liquid outlet valve 38, a second heat storage coil 39, a second liquid outlet pipe 40, a first liquid inlet valve 41, a first liquid inlet pipe 42, and a first liquid outlet valve 45. In another embodiment, the solar energy storage system further comprises a first bypass line 44 and a bypass valve 43 disposed on the first bypass line 44.
In one embodiment, the heat pump heating system includes an indoor radiator 11, a high temperature return line 12, a first throttle 13, a flash tank 14, a return line 15, a second throttle 16, an evaporator coil 17, a low temperature vapor line 18, a compressor 19, a high temperature vapor line 20, and a make-up gas line 21.
In one embodiment, the tank heating system includes an insulated hot water storage tank 51, an electric heating coil 52, a water return valve 53, a water outlet valve 54, a water return line 55, and a water outlet line 56.
The operation principle of the heating and heating dual supply system for storing solar energy by using ice-water mixture is as follows.
The solar collector 35 collects heat exchange working medium (i.e., water) inside the solar heating solar storage system when the sun is sufficient in the daytime. At this time, the third liquid outlet valve 33, the second liquid inlet valve 36, the second liquid outlet valve 38, the first liquid outlet valve 45 are opened, the first liquid inlet valve 41 and the bypass valve 43 are closed, the high-temperature heat exchange working medium flows into the upper hot water insulation layer of the heat insulation and storage water tank 51 first, and flows through the second heat storage coil 39 to heat water in the inner space of the upper layer of the heat insulation and storage water tank 51, so that the water temperature is increased to more than 50 ℃. Then, the heat exchange working medium with a slightly lower temperature flows into the first heat storage coil 31 in the ice-water mixture heat storage layer at the lower layer of the heat preservation and heat storage water tank 51, the ice-water mixture maintained at 0 ℃ in the heat storage layer is further melted, and the heat is further stored in the ice-water mixture at 0 ℃. Finally, the heat exchange medium flows through the circulation pump 32 and then flows into the solar heat collector 35 again to collect solar energy. At this moment, the control valve 62 of the communication pipeline in the water tank heating system can be opened to allow the hot water in the upper hot water insulation layer of the heat-preservation and heat-storage water tank 51 to flow into the lower layer in a proper amount, so that the lower layer of the heat-preservation and heat-storage water tank 51 is filled with the water working medium, the gap left by volume reduction after the solid ice melts is filled, heat exchange between the first heat-preservation coil pipe 31 and the gas in the gap is prevented, the heat exchange efficiency is deteriorated, and solid-liquid. The solid-liquid heat exchange coefficient is far higher than the solid-gas heat exchange coefficient and is about 2 orders of magnitude higher.
When the ice in the ice-water mixture is completely melted and the water temperature rises, the first liquid outlet valve 45 is closed, the bypass valve 43 is opened, the heat exchange working medium does not flow into the lower layer of the water tank any more, the energy storage is not carried out any more, and the temperature of the water tank at the lower layer is always kept at 0 ℃.
In the daytime when the sun is insufficient, the third liquid outlet valve 33, the first liquid inlet valve 41 and the first liquid outlet valve 45 are opened, the second liquid inlet valve 36, the second liquid outlet valve 38 and the bypass valve 43 are closed, the heat exchange working medium directly flows into the first heat storage coil 31 in the ice-water mixture heat storage layer at the lower layer of the heat preservation and heat storage water tank 51, and the ice-water mixture in the heat preservation and heat storage water tank is further melted at 0 ℃. Meanwhile, at the moment, the electric heating coil 52, the circulating water return valve 57, the circulating water pump 59, the circulating water outlet valve 60 and the communication pipeline control valve 62 in the water tank heating system are opened, the electric heating coil 52 continuously heats water on the upper layer of the heat-preservation and heat-storage water tank 51, then the water flows into the lower layer through the layered communication pipeline 61 of the heat-preservation and heat-storage water tank 51, and the circulating water pump 59 sends low-temperature water into the upper layer through the circulating water pipe 58 continuously until heat storage is finished. Finally, if the temperature of the water in the upper layer of the heat preservation and storage water tank 51 is not enough, the water can be further heated by the electric heating coil 52 until the temperature meets the heating requirement.
When heating at night, the heat pump heating system works, a heating working medium absorbs heat from constant 0 ℃ water in the water tank in the evaporation coil 17 and evaporates, generated steam flows into the compressor 19, flows into the indoor radiator 11 for condensation and heat supply after being compressed, heated and boosted, then flows into the flash tank 14 through the first throttle valve 13, and is flashed to generate saturated liquid and saturated steam, the saturated liquid flows into the evaporation coil 17 through the second throttle valve 16, and the saturated steam flows into the compressor 19 through the air supplementing pipeline 21 to improve the efficiency of the compressor 19, so that the overall efficiency of the system is improved. During heat supply, hot water on the upper layer of the heat-insulation and heat-storage water tank 51 in the water tank heating system flows into a user end through the water outlet pipeline 56, and after the use is finished, the consumed water amount is supplemented through the water return pipeline 55.
In another embodiment, the heating and heating dual-supply system for storing solar energy by using an ice-water mixture further comprises a wireless temperature sensor and a controller, wherein the wireless temperature sensor is arranged in the internal space of the lower layer of the thermal insulation and heat storage water tank 51 and used for measuring the temperature of the ice-water mixture, and the controller is configured to adjust the heat input or the cold input in the internal space of the lower layer of the thermal insulation and heat storage water tank 51 based on the temperature signal of the wireless temperature sensor. Specifically, when the wireless temperature sensor detects that the temperature in the internal space of the lower layer of the heat preservation and storage water tank 51 is higher than 0 ℃, the controller cuts off all heat input to the internal space of the lower layer of the heat preservation and storage water tank 51, so that the content in the internal space of the lower layer of the heat preservation and storage water tank 51 is always kept in the state of ice-water mixture, and the temperature of the content is always kept at 0 ℃. Similarly, when the wireless temperature sensor detects that the temperature in the internal space of the lower layer of the heat preservation and storage water tank 51 is lower than 0 ℃, the controller cuts off all cold energy input to the internal space of the lower layer of the heat preservation and storage water tank 51, so that the content in the internal space of the lower layer of the heat preservation and storage water tank 51 is always kept in the state of ice-water mixture, and the temperature of the content is always kept at 0 ℃.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A heating and heat supply dual-supply system for storing solar energy by utilizing ice-water mixture is characterized in that the heating and heat supply dual-supply system comprises a solar energy storage system, a heat pump heating system, a water tank heating system and a heat preservation and storage water tank;
the heat preservation and storage water tank comprises a heat preservation and storage water tank upper layer and a heat preservation and storage water tank lower layer which are mutually insulated, wherein the heat preservation and storage water tank upper layer is used for storing hot water, the heat preservation and storage water tank lower layer is used for storing ice-water mixture, a communicating pipeline is arranged between the heat preservation and storage water tank upper layer and the heat preservation and storage water tank lower layer, and a communicating pipeline control valve is arranged on the communicating pipeline;
the solar energy storage system is used for absorbing solar energy and storing the solar energy in the internal space of the heat preservation and heat storage water tank respectively through a mixture of water and ice water;
the heat pump heating system is used for releasing heat energy stored in the inner space of the lower layer of the heat-preservation and heat-storage water tank through an ice-water mixture;
and the water tank heat supply system is used for releasing heat energy stored in the inner space of the upper layer of the heat-preservation and heat-storage water tank through water.
2. The heating and heat supply dual-supply system for storing solar energy by using ice-water mixture as claimed in claim 1, wherein the heat-preservation and heat-storage water tank further comprises a circulating water pump and a circulating pipeline, one end of the circulating pipeline is in fluid communication with the lower layer of the heat-preservation and heat-storage water tank, the other end of the circulating pipeline is in fluid communication with the upper layer of the heat-preservation and heat-storage water tank, the circulating water pump is arranged in the circulating pipeline, a circulating water outlet valve is arranged between the lower layer of the heat-preservation and heat-storage water tank and the circulating water pump, and a circulating water return valve is arranged between the circulating water pump and the.
3. The dual heating and heating system using an ice-water mixture for solar energy storage according to claim 1, wherein at least 10% of the inner volume of the inner space of the lower layer of the thermal insulation and thermal storage water tank is not filled with the ice-water mixture.
4. The heating and heating dual supply system for storing solar energy by using ice-water mixture as claimed in claim 1, wherein a heater is provided in the inner space of the upper layer of the thermal insulation and thermal storage water tank.
5. The dual heating and supply system using ice water mixture to store solar energy as claimed in claim 1, wherein the solar energy storage system comprises a solar heat collector, a first liquid inlet pipeline, a first heat storage coil, a first liquid outlet pipeline and a circulating pump, which form a fluid circulation loop;
wherein the solar thermal collector is used for absorbing solar energy and heating water in a solar energy storage system;
the first heat storage coil comprises a liquid inlet and a liquid outlet and is arranged in the inner space of the lower layer of the heat preservation and heat storage water tank;
the first liquid inlet pipeline is provided with a first liquid inlet valve, and the first liquid inlet valve is arranged on a pipeline between the solar heat collector and the lower layer of the heat-preservation and heat-storage water tank;
wherein, be provided with first liquid valve and second liquid valve on the first drain pipe, first liquid valve sets up heat preservation heat storage water tank lower floor with on the pipeline between the circulating pump, the second liquid valve sets up the circulating pump with on the pipeline between the solar collector.
6. The dual supply system for heating and supplying solar energy stored with ice-water mixture as claimed in claim 5, wherein the solar energy storage system further comprises a first bypass pipeline, the inlet end of the first bypass pipeline is in fluid communication with the first inlet valve and the pipeline between the lower layers of the thermal insulation and heat storage water tank, the outlet end of the first bypass pipeline is in fluid communication with the first outlet valve and the pipeline between the circulating pump, and a bypass valve is disposed on the first bypass pipeline.
7. The heating and heating dual supply system for storing solar energy by using ice-water mixture as claimed in claim 5 or 6, wherein the solar energy storage system further comprises a second liquid inlet pipeline, a second heat storage coil and a second liquid outlet pipeline;
the second heat storage coil comprises a liquid inlet and a liquid outlet and is arranged in the inner space of the upper layer of the heat preservation and storage water tank;
one end of the second liquid inlet pipeline is in fluid communication with the solar thermal collector, and the other end of the second liquid inlet pipeline is in fluid communication with the second heat storage coil pipe;
one end of the second liquid outlet pipe is communicated with a liquid outlet fluid of the second heat storage coil pipe, one end of the second liquid outlet pipe is communicated with a first liquid inlet valve and a pipeline fluid between the lower layers of the heat preservation and storage water tank, and the second liquid outlet pipe is provided with a second liquid outlet valve.
8. The heating and heating dual supply system for storing solar energy by using ice-water mixture as claimed in claim 1, wherein the heat pump heating system comprises an evaporation coil, a low temperature steam pipeline, a compressor, a high temperature steam pipeline, an indoor radiator, a high temperature liquid return pipeline, a flash tank and a liquid return pipeline which form a fluid circulation loop;
the evaporation coil comprises an inlet and an outlet and is arranged in the inner space of the lower layer of the heat-preservation and heat-storage water tank;
wherein the low temperature vapor line is disposed between the evaporator coil outlet and the compressor, the high temperature vapor line is disposed between the compressor and the indoor radiator, the high temperature return line is disposed between the indoor radiator and the flash tank, and the return line is disposed between the flash tank and the evaporator coil inlet;
an air supplement pipeline is arranged between the flash tank and the compressor and used for supplementing saturated gas into the compressor;
and a first throttling valve is arranged on the high-temperature liquid return pipeline, and a second throttling valve is arranged on the liquid return pipeline.
9. The heating and heating dual-supply system for storing solar energy by using ice-water mixture as claimed in claim 1, wherein the heating system comprises a water outlet pipeline and a water return pipeline, the water outlet pipeline is in fluid communication with the upper layer of the heat-preservation and heat-storage tank, the water outlet pipeline is used for conveying hot water from the upper layer of the heat-preservation and heat-storage tank to a user, the water return pipeline is used for supplementing water to the upper layer of the heat-preservation and heat-storage tank, the water outlet pipeline is provided with a water outlet valve, and the water return pipeline is provided with a water return valve.
10. The heating and heating dual-supply system for storing solar energy by using ice-water mixture as claimed in claim 1, further comprising a wireless temperature sensor and a controller, which are communicated with each other, wherein the wireless temperature sensor is arranged in the internal space of the lower layer of the heat-preservation and heat-storage tank and is used for measuring the temperature of the ice-water mixture, and the controller is configured to adjust the heat input or the cold input in the internal space of the lower layer of the heat-preservation and heat-storage tank based on the temperature signal of the wireless temperature sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915794A (en) * | 2021-09-27 | 2022-01-11 | 河南科技大学 | Refrigeration and heating method of multi-energy complementary refrigeration/heating energy storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915794A (en) * | 2021-09-27 | 2022-01-11 | 河南科技大学 | Refrigeration and heating method of multi-energy complementary refrigeration/heating energy storage system |
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