CN104930730A - Phase-change heat storage solar water heater without heat storage box - Google Patents
Phase-change heat storage solar water heater without heat storage box Download PDFInfo
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- CN104930730A CN104930730A CN201510403937.8A CN201510403937A CN104930730A CN 104930730 A CN104930730 A CN 104930730A CN 201510403937 A CN201510403937 A CN 201510403937A CN 104930730 A CN104930730 A CN 104930730A
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
The invention provides a solar water heater using a phase-change material as a heat storage medium. The problem that an existing phase-change heat storage solar water heater is high in cost and low in heat conducting efficiency is solved. The phase-change heat storage solar water heater without a heat storage box comprises full-glass solar vacuum heat-collecting tubes, a header and a support, wherein a water inlet and a water outlet are formed in the header. In addition, the phase-change heat storage solar water heater is further provided with a phase-change material filling port. The full-glass solar vacuum heat-collecting tubes are filled with the phase-change material. Finned tube exchangers are arranged in the full-glass solar vacuum heat-collecting tubes, the whole vacuum tubes and are almost full of the finned tube exchangers, and the finned tube exchangers are in tight contact with the inner walls of the vacuum tubes a. A little space for phase-change material expansion is reserved at the upper portion of each vacuum tube. Due to the fact that the phase-change material is used as the heat storage medium, the heat storage capacity of the heat storage medium is several times or more of that of water, and more heat can be stored. Due to the heat storage box is omitted, the phase-change material is directly filled in the vacuum tubes, and cost is greatly reduced. The full-glass solar vacuum heat-collecting tubes directly transfer converted heat energy to the heat storage medium and is high in heat efficiency. The vacuum tubes do not bear pressure, and hot water is still output in a pressure-bearing mode.
Description
Technical field
The present invention relates to solar water heater, specifically, the solar water heater of to be a kind of with phase-change material be heat storage medium.
Technical background
Existing solar water heater is using water as heat storage medium, and it utilizes the rising of water temperature (sensible heat) to carry out accumulation of heat, and thus heat storage capacity is very low; And along with the rising of water temperature, its dispersed heat is also more.
Utilize phase-change material as the heat storage medium of solar water heater, greatly can improve the heat storage capacity of water heater.Although some patents have also considered the heat storage medium utilizing phase-change material as solar water heater, they have had heat storage tank, and by conducting-heat elements, the heat energy that solar energy changes are passed to phase-change material, and thus cost is high, and heat transfer efficiency is low.
Summary of the invention
The present invention is to solve: existing phase change thermal storage solar water heater cost is high, the problem that heat transfer efficiency is low.
Phase change thermal storage solar water heater without thermal storage tank of the present invention, comprises full-glass solar energy collecting vacuum tube, header, support, header is provided with water inlet and delivery port, is provided with phase-change material in addition and fills mouth; At full-glass solar energy collecting vacuum tube built with phase-change material; Heat exchange of heat pipe is arranged in full-glass solar energy collecting vacuum tube, finned tube exchanger be almost full of whole vacuum tube and with the inwall close contact of vacuum tube; The expansion space of a little phase-change material is left on the top of vacuum tube.The fin of described finned tube exchanger leaves hole, is convenient to liquid phase-change material and can be full of between the fin in whole vacuum tube.
Adopt finned tube exchanger, finned tube exchanger be almost full of whole vacuum tube and with the inwall close contact of vacuum tube; Exactly in order to allow phase-change material fully contact with finned tube exchanger, abundant heat exchange.The present invention is owing to utilizing phase-change material for heat storage medium, and its heat storage capacity is times or higher of water, can store the feature of more heat, eliminate heat storage tank, directly phase-change material is contained in vacuum tube, thus greatly reduces costs, and hot water is still with the water outlet of pressure-bearing mode.In addition, the heat energy of conversion is directly passed to heat storage medium by full-glass solar energy collecting vacuum tube, eliminates conducting-heat elements, and thus the thermal efficiency is high.
Its course of work: the heat storage medium in vacuum tube and phase-change material are solid-state at normal temperatures, when fine day, solar energy heat collection pipe absorbs solar energy and solar energy is converted to heat energy, pass to the phase-change material between fin by the finned tube exchanger of the inwall close contact of vacuum tube, the temperature of phase-change material is raised gradually.When phase-change material temperature rises to phase transition temperature, start by solid-state to liquid phase transition process.When starting phase transformation, partial phase change material becomes liquid state, and along with the conversion of solar energy, the heat that phase-change material absorbs increases gradually, is got more and more, until all become liquid state from the solid-state phase-change material becoming liquid state.After this, the mode that liquid phase-change material can raise with temperature continues accumulation of heat.When using water, cold water flows in finned tube from water inlet, absorbs the heat that phase-change material stores in finned tube exchanger gradually, and temperature rising becomes hot water and flows out from delivery port.Liquid phase-change material transfers heat to the water in heat exchanger tube, and temperature can decline gradually.When its temperature to be down to by liquid state to solid-state phase transition temperature, a small amount of phase-change material can be become solid-state from liquid state.Along with the continuous increase of water consumption, the solid portion in phase-change material increases gradually, until all become solid-state.After this, the mode that solid-state phase-change material still can decline with temperature continues to release heat, the cold water in heating fins pipe.
As improvement of the present invention, the phase transition temperature of described phase-change material is 45 DEG C-85 DEG C.
As improvement of the present invention, the external diameter >=70mm of described full-glass solar energy collecting vacuum tube.
As improvement of the present invention, described finned tube exchanger is U-shaped finned tube exchanger.
For phase change thermal storage solar water heater without thermal storage tank recited above, between the finned tube exchanger in described full-glass solar energy collecting vacuum tube, adopt series system, series and parallel mode or parallel way can also be adopted.
For any one phase change thermal storage solar water heater without thermal storage tank recited above, it also can comprise the electric heater be arranged in vacuum tube, and electric heater inserts in finned tube exchanger, can enable electric heater to heat when overcast and rainy.
Beneficial effect of the present invention: 1, owing to adopting phase-change material to be heat storage medium, its heat storage capacity is times or higher of same volume size water.When fine day, more heat can be stored in order to overcast and rainy use.2, without heat storage tank and conducting-heat elements, thus cost is greatly reduced.3, the heat energy of conversion is directly passed to heat storage medium by full-glass solar energy collecting vacuum tube, and the thermal efficiency is high.4, vacuum tube not pressure-bearing, be convenient to manufacture, cost is low.5, hot water is still with the water outlet of pressure-bearing mode, bath comfort.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment.
Fig. 2 is the view that vacuum tube hush panel looks up from vacuum tube.
Fig. 3 is fin hole figure.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment: phase change thermal storage solar water heater without thermal storage tank
In the present embodiment, finned tube exchanger adopts U-shaped finned tube exchanger, phase change thermal storage solar water heater without thermal storage tank shown in Fig. 1, comprise full-glass solar energy collecting vacuum tube 9, header 1, support 10, header 1 is provided with water inlet 5 and delivery port 6, is provided with phase-change material in addition and fills mouth 3; At full-glass solar energy collecting vacuum tube 9 built with phase-change material 7; U-shaped finned tube exchanger 8 is arranged in full-glass solar energy collecting vacuum tube 9, U-shaped finned tube exchanger 8 be almost full of whole vacuum tube 9 and with the inwall close contact of vacuum tube 9; The expansion space of a little phase-change material is left on the top of vacuum tube 9.The fin of described U-shaped finned tube exchanger 8 leaves hole 12 (see Fig. 3), be convenient to liquid phase-change material and can be full of between the fin in whole vacuum tube 1.In header 1, be also provided with heat-insulation layer 2 and vacuum tube hush panel 4, Fig. 2 is the view that vacuum tube hush panel 4 looks up from vacuum tube, 41 is mouth of pipe clip, and 42 is U-tube hole, and 43 for filling pore.Series system is adopted between U-shaped finned tube exchanger 8 in header 1 in each full-glass solar energy collecting vacuum tube 9.
When fine day, solar energy heat collection pipe absorbs solar energy and solar energy is converted to heat energy, pass to the phase-change material 7 between fin by the U-shaped finned tube exchanger 8 of the inwall close contact of vacuum tube 9, the temperature of phase-change material 7 is raised gradually, start by solid-state to liquid phase transition process.Along with the conversion of solar energy, the heat that phase-change material absorbs increases, gradually until all become liquid state.After this, the mode that liquid phase-change material 7 can raise with temperature continues accumulation of heat.When using water, cold water flows in U-tube 8 from water inlet 5, absorbs the heat that phase-change material 3 stores in U-shaped finned tube exchanger 8 gradually, and temperature rising becomes hot water and flows out from delivery port 6.After liquid phase-change material 7 transfers heat to the water in heat exchanger 8, temperature can decline gradually.When its temperature to be down to by liquid state to solid-state phase transition temperature, phase-change material 7 is become solid-state gradually from liquid state, along with the continuous increase of water consumption, until all become solid-state.After this, the mode that solid-state phase-change material 7 still can decline with temperature continues to release heat, the cold water in heating U-tube 8.
Claims (7)
1. phase change thermal storage solar water heater without thermal storage tank, comprise full-glass solar energy collecting vacuum tube, header, support, header is provided with water inlet and delivery port, it is characterized in that: at full-glass solar energy collecting vacuum tube built with phase-change material, finned tube exchanger is arranged in full-glass solar energy collecting vacuum tube, finned tube exchanger be full of whole vacuum tube and with the inwall close contact of vacuum tube; The expansion space of phase-change material is left on the top of vacuum tube; Header is also provided with phase-change material and fills mouth.
2. phase change thermal storage solar water heater without thermal storage tank according to claim 1, is characterized in that: the fin of described finned tube exchanger leaves hole, is convenient to liquid phase-change material and can be full of between the fin in whole vacuum tube.
3. phase change thermal storage solar water heater without thermal storage tank according to claim 1 and 2, is characterized in that: the phase transition temperature of described phase-change material is 45 DEG C-85 DEG C.
4. phase change thermal storage solar water heater without thermal storage tank according to claim 1 and 2, is characterized in that: the external diameter >=70mm of described full-glass solar energy collecting vacuum tube.
5. phase change thermal storage solar water heater without thermal storage tank according to claim 1 and 2, is characterized in that: adopt series system between the finned tube exchanger in described full-glass solar energy collecting vacuum tube.
6. phase change thermal storage solar water heater without thermal storage tank according to claim 1 and 2, is characterized in that: adopt series and parallel mode between the finned tube exchanger in described full-glass solar energy collecting vacuum tube.
7. phase change thermal storage solar water heater without thermal storage tank according to claim 1 and 2, is characterized in that: adopt parallel way between the finned tube exchanger in described full-glass solar energy collecting vacuum tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510403937.8A CN104930730A (en) | 2015-07-13 | 2015-07-13 | Phase-change heat storage solar water heater without heat storage box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510403937.8A CN104930730A (en) | 2015-07-13 | 2015-07-13 | Phase-change heat storage solar water heater without heat storage box |
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| CN104930730A true CN104930730A (en) | 2015-09-23 |
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| CN201510403937.8A Pending CN104930730A (en) | 2015-07-13 | 2015-07-13 | Phase-change heat storage solar water heater without heat storage box |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650897A (en) * | 2016-01-05 | 2016-06-08 | 上海理工大学 | Solar instantaneous water-based phase change heat accumulator |
| CN105928227A (en) * | 2016-05-26 | 2016-09-07 | 杨新甫 | Heat-storage-tank-free phase-change heat storage solar water heater |
| CN106885381A (en) * | 2017-03-23 | 2017-06-23 | 中国建筑股份有限公司 | A kind of solar energy hot hold over system |
| CN106931679A (en) * | 2017-03-23 | 2017-07-07 | 中国建筑股份有限公司 | A kind of solar energy hot refrigeration system and its progress control method based on accumulation of energy |
| CN109357317A (en) * | 2018-09-27 | 2019-02-19 | 山东泰安亿美达能源科技有限公司 | A kind of solar heating air-conditioning |
| CN112344560A (en) * | 2019-08-09 | 2021-02-09 | 芜湖美的厨卫电器制造有限公司 | Shell assembly and phase change water heater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205049A (en) * | 1982-05-26 | 1983-11-29 | Toshiba Corp | Solar heat collecting tube |
| CN101907362A (en) * | 2010-08-30 | 2010-12-08 | 江苏省华扬太阳能有限公司 | Phase change thermal storage solar water heater without thermal storage tank |
| CN201772655U (en) * | 2010-08-30 | 2011-03-23 | 江苏省华扬太阳能有限公司 | Phase-change heat accumulating solar water heater without heat accumulating case |
| CN103335415A (en) * | 2013-06-26 | 2013-10-02 | 江苏启能新能源材料有限公司 | Phase change heat storage solar water heater with enhanced heat absorption capability |
| CN203671962U (en) * | 2014-01-23 | 2014-06-25 | 河北科技大学 | Solar water heater with heat storage and release functions |
-
2015
- 2015-07-13 CN CN201510403937.8A patent/CN104930730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58205049A (en) * | 1982-05-26 | 1983-11-29 | Toshiba Corp | Solar heat collecting tube |
| CN101907362A (en) * | 2010-08-30 | 2010-12-08 | 江苏省华扬太阳能有限公司 | Phase change thermal storage solar water heater without thermal storage tank |
| CN201772655U (en) * | 2010-08-30 | 2011-03-23 | 江苏省华扬太阳能有限公司 | Phase-change heat accumulating solar water heater without heat accumulating case |
| CN103335415A (en) * | 2013-06-26 | 2013-10-02 | 江苏启能新能源材料有限公司 | Phase change heat storage solar water heater with enhanced heat absorption capability |
| CN203671962U (en) * | 2014-01-23 | 2014-06-25 | 河北科技大学 | Solar water heater with heat storage and release functions |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650897A (en) * | 2016-01-05 | 2016-06-08 | 上海理工大学 | Solar instantaneous water-based phase change heat accumulator |
| CN105928227A (en) * | 2016-05-26 | 2016-09-07 | 杨新甫 | Heat-storage-tank-free phase-change heat storage solar water heater |
| CN106885381A (en) * | 2017-03-23 | 2017-06-23 | 中国建筑股份有限公司 | A kind of solar energy hot hold over system |
| CN106931679A (en) * | 2017-03-23 | 2017-07-07 | 中国建筑股份有限公司 | A kind of solar energy hot refrigeration system and its progress control method based on accumulation of energy |
| CN109357317A (en) * | 2018-09-27 | 2019-02-19 | 山东泰安亿美达能源科技有限公司 | A kind of solar heating air-conditioning |
| CN112344560A (en) * | 2019-08-09 | 2021-02-09 | 芜湖美的厨卫电器制造有限公司 | Shell assembly and phase change water heater |
| CN112344560B (en) * | 2019-08-09 | 2022-03-18 | 芜湖美的厨卫电器制造有限公司 | Shell assembly and phase change water heater |
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Application publication date: 20150923 |
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