CN107166771A - Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system - Google Patents
Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system Download PDFInfo
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- CN107166771A CN107166771A CN201710335150.1A CN201710335150A CN107166771A CN 107166771 A CN107166771 A CN 107166771A CN 201710335150 A CN201710335150 A CN 201710335150A CN 107166771 A CN107166771 A CN 107166771A
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- Prior art keywords
- heat
- pipe
- accumulation
- pipeline
- water
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
-
- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system, the problem of it solves solar water heater accumulation of heat, outer surface of building can be inlayed or be suspended on to the regenerative apparatus, effectively save space, without water pump, by the reliable and stable operation of Natural Circulation, its technical scheme is：Including accumulation of heat casing, solar water pipeline and heat-releasing pipeline are set in the heat storage tank body, the gap between accumulation of heat cabinet wall and solar water pipeline, heat-releasing pipeline, which is formed, fills phase change heat storage material in accumulation of heat space, the accumulation of heat space；Medium is flowed with natural circulation mode in solar water pipeline, and transfers heat to phase change heat storage material, and heat exchange is carried out with medium in heat-releasing pipeline after phase change heat storage material accumulation of heat.
Description
Technical field
The present invention relates to solar heat-preservation technical field, more particularly to a kind of Quick-action type wall hanging Natural Circulation phase transformation sun
Can regenerative apparatus and system.
Background technology
At present, solar water heater is a kind of most common solar energy heat utilization device, but because solar energy is become by weather
Change, the influence such as day alternates with night, have the shortcomings that discontinuous, unstable, therefore, carried out more than solar water heater equipped with regenerative apparatus
Accumulation of heat.
And the regenerative apparatus of existing solar water heater, most of is cylindrical water tank, except higher floor is arranged on roof
Outer major part is arranged on balcony, both takes living space, also influences indoor beauty；Small part uses the phase transformation of phase change heat storage material
Though heat storage tank space-consuming is slightly smaller, the high-temp liquid being typically necessary in water pump driving heat collector exchanges heat with heat storage tank, so
Not only consume energy, also reduce the reliability of solar water heating system.
In summary, in the prior art for solar water heater accumulation of heat the problem of, still lack effective solution.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of Quick-action type wall hanging Natural Circulation phase transformation sun
Outer surface of building can be inlayed or be suspended on to energy regenerative apparatus, the regenerative apparatus, and effectively save space, without water pump, passes through nature
Stable circulation reliability service；
Further, the present invention uses following technical proposals：
Set in Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus, including accumulation of heat casing, the heat storage tank body
Solar water pipeline and heat-releasing pipeline, the gap between accumulation of heat cabinet wall and solar water pipeline, heat-releasing pipeline are formed
Phase change heat storage material is filled in accumulation of heat space, the accumulation of heat space；
Medium is flowed with natural circulation mode in solar water pipeline, and transfers heat to phase change heat storage material, phase
After change heat storage material accumulation of heat heat exchange is carried out with medium in heat-releasing pipeline.
The solar heat-storing device of the present invention sets accumulation of heat casing, and solar water pipeline is set in heat storage tank body and is put
Hot water in pipe line, solar water pipeline in circulation heat collector, its hot water is flowed with natural circulation mode, in flow process
In transfer heat to phase change heat storage material；After phase change heat storage material heat absorption, when cold water circulates in heat-releasing pipeline, phase-transition heat-storage
Material transfers heat to cold water in heat-releasing pipeline, and then causes the heating of heat-releasing pipeline inner cold water, and being delivered to user needs hot water
Place.The device automatic cycle of the present invention, and heat exchange can be realized automatically without water pump setting, and space-consuming is smaller.
Further, the solar water pipeline includes the upper header with entrance and the lower collector pipe with outlet, institute
State upper header and be arranged at top in heat storage tank body, lower collector pipe is arranged at bottom in heat storage tank body, connected between upper header and lower collector pipe
It is connected to a few branch pipe.Hot water in heat collector is entered by upper header, enters lower collector pipe by branch pipe, and collection is entered back into by lower collector pipe
Hot device, variable density caused by being changed by water temperature in heat collector, it is possible to achieve Natural Circulation.
Further, the branch pipe is many, and many branch pipes are uniformly arranged between setting and upper header and lower collector pipe.Can be with
So that the phase change heat storage material in heat storage tank body absorbs even heat.
Further, the heat-releasing pipeline includes at least one coil pipe into snakelike distribution in perpendicular, the disk
Pipe upper end is connected with heat outting pipe outlet, and the coil pipe lower end is connected with heat release tube inlet.Heat-releasing pipeline is arranged to coil pipe, can be with
Increase the heat exchange area of heat-releasing pipeline and phase change heat storage material.
Further, the heat-releasing pipeline and solar water pipeline are arranged in a crossed manner.
Further, multiple water pipe brackets are set in the heat storage tank body, and heat-releasing pipeline is supported on water pipe bracket.Water pipe
Bracket is to heat-releasing pipeline with supporting role, it is ensured that its stability.
Further, the accumulation of heat casing top sets feeding port.Feeding port is used to add materials into casing and can be simultaneous
Exhaust outlet is done, feeding port is salable to close.
Further, the external side of the heat storage tank sets insulation material.Insulation material is set, it is ensured that in heat storage tank body
Temperature will not be affected by the external environment.
Further, the phase change heat storage material is inorganic hydrated salt, or the phase change heat storage material is expanded graphite/stone
Wax composite, the phase change heat storage material phase transition temperature is at 40-70 DEG C.
A kind of solar energy phase transition heat accumulation system, including heat collector and regenerative apparatus as described above, the upper header enter
Mouth and heat collector outlet, the outlet of the lower collector pipe is connected with heat collector entrance.Solar water pipeline and heat collector connect
Lead to, water temperature high-density step-down after the water heating in heat collector, hot water flows up into solar water pipeline in heat collector
Upper header, lower collector pipe is circulated to downwards via branch pipe, during flowing downward, and the hot water in solar water pipeline is and phase transformation
Heat exchange occurs for heat-storing material, and phase change heat storage material, which is heated, carries out phase-transition heat-storage.
Further, heat release tube inlet and malleation the water supply line connection, heat outting pipe outlet and user's water service pipe road connect
Connect.Cold water is entered after heat outting pipe by malleation water supply line, and cold water carries out heat exchange in phase change heat storage material and heat outting pipe, makes to put
User's water service pipe road is sent into after temperature of cold water rises in pipe line for users to use.
Compared with prior art, the beneficial effects of the invention are as follows：
Due to using phase change heat storage material, heat storage capacity is strong, compared with small volume needed for water accumulation of heat, and the flat rectangular bodily form is made
Shape, can inlay or hang on exterior wall or balcony, be not take up indoor inhabitation or balcony space.
Because solar water pipeline employs upper lower collector pipe and the structure of branch pipe, and upper header is located at highest point in case,
Lower collector pipe is located at lowest part in case, and heat storage tank branch pipe, which is cooled into branch pipe in down-comer, correspondence heat collector and is heated, turns into tedge,
Natural Circulation can be realized using the density contrast of water, it is safe and reliable to operation without water pump.
Due to heat-releasing pipeline can direct tap water pipe network, fluid interchange can be carried out with city planting ductwork hydraulic pressure, without water pump, peace
It is complete reliable；Tap water pipe line is coil arrangement, and heat exchange area is big, and heat exchange is abundant, and running water can be heated into shower heat immediately
Water.
Because accumulation of heat and exothermic process are using two sets of independent pipelines, accumulation of heat, heat release simultaneously independent can be carried out, easy to use,
Flexibly.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is solar heat-storing device main view profile of the present invention；
Fig. 2 is solar heat-storing device side view cutaway drawing of the present invention；
In figure, 1 is accumulation of heat casing, and 2 be solar heat water inlet, and 3 be solar water water return outlet, and 4 be solar water
Upper header, 5 be solar water lower collector pipe, and 6 be solar water branch pipe, and 7 heat release tube inlets, 8 heat outting pipes are exported, and 9 be heat release
Pipeline, 10 be phase change heat storage material, and 11 be water pipe bracket.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Term explains part：Natural Circulation refer to water supply using hot water and backwater temperature difference and make hot water in pipe network from
The mode of row circulation.
As background technology is introduced, the problem of there is solar water heater accumulation of heat in the prior art, in order to solve such as
On technical problem, present applicant proposes a kind of Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system.
In a kind of typical embodiment of the application, followed naturally there is provided a kind of Quick-action type wall hanging as Figure 1-Figure 2
Solar water pipeline and heat-releasing pipeline 9 are set in ring phase-change solar regenerative apparatus, including accumulation of heat casing 1, accumulation of heat casing 1,
Gap between the inwall of accumulation of heat casing 1 and solar water pipeline, heat-releasing pipeline 9, which is formed in accumulation of heat space, accumulation of heat space, fills
Phase change heat storage material 10；Accumulation of heat casing 1 is shaped as partially flat cube casing；
Medium is flowed with natural circulation mode in solar water pipeline, and transfers heat to phase change heat storage material, phase
After change heat storage material accumulation of heat heat exchange is carried out with medium in heat-releasing pipeline.
Solar water pipeline includes the upper header with entrance (i.e. solar heat water inlet 2), and (i.e. solar heat is waterborne
Collector 4) and with the lower collector pipe (i.e. solar water lower collector pipe 5) for exporting (i.e. solar water water return outlet 3), solar water
Upper header 4 is arranged at the internal upper part of accumulation of heat casing 1, and solar water lower collector pipe 5 is arranged at bottom in accumulation of heat casing 1, solar heat
At least one branch pipe (i.e. solar water branch pipe 6) is connected between collector 4 waterborne and solar water lower collector pipe 5.Solar heat
When water branch pipe 6 is set to many, uniformly arrangement is set and solar water upper header 4 and the sun many solar water branch pipes 6
Between energy hot water lower collector pipe 5, the phase change heat storage material in heat storage tank body can be caused to absorb even heat.Solar heat collection waterborne
Pipe 4 is horizontally placed on the inside the top of accumulation of heat casing 1, and solar water lower collector pipe 5 is horizontally placed on most lower inside accumulation of heat casing 1
Side, the generally same Cheng Guanlu of solar water pipeline.
Heat-releasing pipeline 9 includes at least one coil pipe into snakelike distribution in perpendicular, and coil pipe upper end goes out with heat outting pipe
Mouth 8 is connected, and coil pipe lower end is connected with heat release tube inlet 7.
In the regenerative apparatus of the present invention, heat-releasing pipeline and solar water pipeline are arranged in a crossed manner.
Multiple water pipe brackets 11 are set in accumulation of heat casing 1, and heat-releasing pipeline 9 is supported on water pipe bracket 11.Water pipe bracket is given
Heat-releasing pipeline is with supporting role, it is ensured that its stability.
The top of accumulation of heat casing 1 sets feeding port.Feeding port is used to exhaust outlet, filler are added materials and can also served as into casing
Mouth is salable to close.
The outside of accumulation of heat casing 1 sets insulation material.Insulation material is set, it is ensured that temperature in heat storage tank body will not be by
External environment influences.
Phase change heat storage material 10 is filled in inside accumulation of heat casing 1 the whole sky in addition to solar water pipeline and heat-releasing pipeline
Between, phase change heat storage material 10 is inorganic hydrated salt, or phase change heat storage material is expanded graphite/paraffin composite, there is relatively solid
Determine phase transition temperature, phase change heat storage material phase transition temperature is at 40-70 DEG C.
There is provided a kind of solar energy phase transition heat accumulation system, including thermal-arrest in another typical embodiment of the application
Device and regenerative apparatus as described above, the solar heat water inlet 2 and heat collector outlet of solar water upper header 4, too
The solar water water return outlet 3 of positive energy hot water lower collector pipe 5 is connected with heat collector entrance, is constituted in solar heat water loops, loop
Medium carries out Natural Circulation by regenerative apparatus and outside heat collector both sides density contrast.Solar water pipeline and heat collector connect
Lead to, water temperature high-density step-down after the water heating in heat collector, hot water flows up into solar water pipeline in heat collector
Upper header, lower collector pipe is circulated to downwards via branch pipe, during flowing downward, and the hot water in solar water pipeline is and phase transformation
Heat exchange occurs for heat-storing material, and phase change heat storage material, which is heated, carries out phase-transition heat-storage.
Heat release tube inlet 7 and malleation water supply line (can be the water sources such as the running water of city planting ductwork) connection, heat outting pipe go out
Mouth 8 and user's water service pipe road (can be that shower etc. is used at water) connection.Cold water is entered after heat outting pipe by malleation water supply line, phase transformation
Cold water carries out heat exchange in heat-storing material and heat outting pipe, makes to send into the confession of user's water service pipe road after the temperature of cold water rises in heat-releasing pipeline
User uses.
The wall-mounted phase-transition heat-storage casing that the present invention is provided, is shaped as flat rectangular body, and small volume can hang or inlay
In outer surface of building, save building and use space, beneficial to architecture-integral；Upper lower collector pipe and the structure of branch pipe can effectively utilize collection
The density contrast of water in hot device and heat storage tank pipeline and form Natural Circulation, exothermic process can be using pressing at the water source such as city planting ductwork
Power, package unit is all without water pump, and energy-saving safe is reliable；Accumulation of heat heat release can be carried out simultaneously, and pouring can be directly obtained by heat exchange box
Bath or hot water for life, it is flexible and convenient to use.
In order that the technical scheme of the application can clearly be understood by obtaining those skilled in the art, below with reference to tool
The course of work of body describes the technical scheme of the application in detail.
During fine day, external solar thermal collector heating heat collector reclaimed water makes hot in its temperature high-density step-down, heat collector
Water is flowed up, and enters solar water upper header 4 in accumulation of heat casing 1, and solar heat in accumulation of heat casing 1 by connecting tube
The water in collector 5 enters outside heat collector by connecting leg supplement under water；Water in solar water upper header 4 passes through solar water
The process that branch pipe 6 flows downward is cooled down by phase change heat storage material 10, and temperature is gradually reduced, density rise, into solar water
Water conservancy in lower collector pipe 5, external solar thermal collector and the solar water pipeline of accumulation of heat casing 1 is carried out certainly with both density contrasts
So circulation.Phase change heat storage material 10 is heated in such flow process and carries out phase-transition heat-storage.
When needing to use water, the cold water at the water source such as running water in city planting ductwork enters heat outting pipe from heat release tube inlet 7
Phase change heat storage material 10 is exchanged heat in road 9, with heat storage tank 1, and because heat-releasing pipeline is longer coil pipe, cold water is passing through accumulation of heat
Become after case and can reach higher temperature, then the place of hot water is needed by flow direction shower of heat outting pipe outlet 8 etc..
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus, it is characterized in that, including accumulation of heat casing, the accumulation of heat casing
Interior setting solar water pipeline and heat-releasing pipeline, between accumulation of heat cabinet wall and solar water pipeline, heat-releasing pipeline between
Phase change heat storage material is filled in gap formation accumulation of heat space, the accumulation of heat space；
Medium is flowed with natural circulation mode in solar water pipeline, and transfers heat to phase change heat storage material, and phase transformation stores
After hot material accumulation of heat heat exchange is carried out with medium in heat-releasing pipeline.
2. regenerative apparatus as claimed in claim 1, it is characterized in that, the solar water pipeline includes the upper collection with entrance
Pipe and the lower collector pipe with outlet, the upper header are arranged at top in heat storage tank body, under lower collector pipe is arranged in heat storage tank body
Portion, connects at least one branch pipe between upper header and lower collector pipe.
3. regenerative apparatus as claimed in claim 2, it is characterized in that, the branch pipe is many, and many branch pipes are uniformly arranged setting
Between upper header and lower collector pipe.
4. regenerative apparatus as claimed in claim 2, it is characterized in that, the heat-releasing pipeline includes at least one in perpendicular
Into the coil pipe of snakelike distribution, the coil pipe upper end is connected with heat outting pipe outlet, and the coil pipe lower end is connected with heat release tube inlet.
5. regenerative apparatus as claimed in claim 1, it is characterized in that, the heat-releasing pipeline and solar water pipeline intersection are set
Put.
6. regenerative apparatus as claimed in claim 1, it is characterized in that, multiple water pipe brackets, heat release are set in the heat storage tank body
Pipe-support is on water pipe bracket.
7. regenerative apparatus as claimed in claim 1, it is characterized in that, the accumulation of heat casing top sets feeding port；The accumulation of heat
Insulation material is set on the outside of casing.
8. regenerative apparatus as claimed in claim 1, it is characterized in that, the phase change heat storage material is inorganic hydrated salt, or described
Phase change heat storage material is expanded graphite/paraffin composite, and the phase change heat storage material phase transition temperature is at 40-70 DEG C.
9. a kind of solar energy phase transition heat accumulation system, it is characterized in that, including heat collector and regenerative apparatus as claimed in claim 4,
The entrance and heat collector outlet of the upper header, the outlet of the lower collector pipe is connected with heat collector entrance.
10. hold over system as claimed in claim 9, it is characterized in that, heat release tube inlet and malleation the water supply line connection is put
Heat pipe is exported and the connection of user's water service pipe road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710335150.1A CN107166771A (en) | 2017-05-12 | 2017-05-12 | Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710335150.1A CN107166771A (en) | 2017-05-12 | 2017-05-12 | Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107166771A true CN107166771A (en) | 2017-09-15 |
Family
ID=59814942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710335150.1A Pending CN107166771A (en) | 2017-05-12 | 2017-05-12 | Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system |
Country Status (1)
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| CN (1) | CN107166771A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883593A (en) * | 2017-11-09 | 2018-04-06 | 内蒙古润泰新能源科技有限公司 | Energy storage pool and energy-storage system |
| CN108871031A (en) * | 2018-05-17 | 2018-11-23 | 辽宁工程技术大学 | A kind of phase change material device and its application method |
| CN111637773A (en) * | 2020-04-26 | 2020-09-08 | 青岛海尔新能源电器有限公司 | Heat exchanger and heat pump water heater |
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| CN202582309U (en) * | 2012-04-13 | 2012-12-05 | 极地熊（上海）储能技术有限公司 | Phase-change heat storage unit |
| CN105043149A (en) * | 2015-08-09 | 2015-11-11 | 大连理工大学 | Phase change heat storage and release integrated heat exchanger |
| CN105509345A (en) * | 2015-12-30 | 2016-04-20 | 西安交通大学 | Solar energy storage device utilizing honeycombed heat storage units |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201191144Y (en) * | 2007-12-03 | 2009-02-04 | 陈定兴 | Phase change energy storageheat exchanger |
| CN201653219U (en) * | 2009-12-03 | 2010-11-24 | 东华大学 | Solar hot-water system phase change heat storage device |
| CN202582309U (en) * | 2012-04-13 | 2012-12-05 | 极地熊（上海）储能技术有限公司 | Phase-change heat storage unit |
| CN105043149A (en) * | 2015-08-09 | 2015-11-11 | 大连理工大学 | Phase change heat storage and release integrated heat exchanger |
| CN105509345A (en) * | 2015-12-30 | 2016-04-20 | 西安交通大学 | Solar energy storage device utilizing honeycombed heat storage units |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883593A (en) * | 2017-11-09 | 2018-04-06 | 内蒙古润泰新能源科技有限公司 | Energy storage pool and energy-storage system |
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| CN111637773A (en) * | 2020-04-26 | 2020-09-08 | 青岛海尔新能源电器有限公司 | Heat exchanger and heat pump water heater |
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Application publication date: 20170915 |