CN102840693A - Heat pipe type panel solar heat collecting device provided with liquid return pipe - Google Patents
Heat pipe type panel solar heat collecting device provided with liquid return pipe Download PDFInfo
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- CN102840693A CN102840693A CN2011101704446A CN201110170444A CN102840693A CN 102840693 A CN102840693 A CN 102840693A CN 2011101704446 A CN2011101704446 A CN 2011101704446A CN 201110170444 A CN201110170444 A CN 201110170444A CN 102840693 A CN102840693 A CN 102840693A
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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 discloses a heat pipe type panel solar heat collecting device provided with a liquid return pipe, which relates to the technology of a panel solar water heater. The heat pipe type panel solar heat collecting device provided with the liquid return pipe comprises a plurality of heat collecting sheets, upper and lower communicating pipes and the liquid return pipe. The upper and lower communicating pipes are respectively connected with the heat collecting sheets paved in parallel and the liquid return pipe. The liquid return pipe connects the tail end of the lower communicating pipe with the upper communicating pipe. Heat transfer pipes on the heat collecting sheets are the same with or close to the liquid return pipe in size, but the size of the heat transfer pipes is smaller than that of the upper and lower communicating pipes. Ethanol working media are filled in the heat transfer pipes, the upper and lower communication pipes and the liquid return pipe. After sunlight is irradiated on the heat collecting pipes, heat absorbed by the heat collecting pipes is gathered to the heat transfer pipes. After the working media in the pipes absorb heat, the liquid ethanol working media are evaporated into a steam state and enter to the upper communicating pipe. The heat is re-transferred to a water tank through water circulation in a sleeve inside the upper communicating pipe, the working media flow back to the lower communicating pipe through the liquid return pipe after being condensed into liquid in the upper communicating pipe, and the liquid working media are distributed into the heat transfer pipes of the heat collecting sheets through the lower communicating pipe.
Description
Technical field
The present invention relates to the flat plate solar water heater technical field, is a kind of heat pipe-type flat solar energy heat collector with liquid back pipe.
Background technology
General flat-plate solar collector adopts the glass-vacuum tube thermal-arrest, carries out heat exchange by the water forced flow in the circulation line, becomes hot medium after colder medium is heated and be recycled to water tank from heat collector in heat collector; Colder water generation heat exchange in the medium of heat and the water tank, thus the water in the water tank is heated up, be recycled to heat collector again after the medium cooling; So continuous cycle heat exchange, thus reach the purpose that adds hot water, from the angle of thermal conduction study; Inboard thermal resistance is big, starts slow.The employed heat transfer medium of heat collector generally is glycol water or water, and thermal capacitance is big, and it is slow to conduct heat, and is prone to night form contrary circulation losses, and collecting efficiency is not high.
Summary of the invention
For overcoming defective of the prior art, the purpose of this invention is to provide a kind of heat pipe-type flat solar energy heat collector, its efficient heat-collecting can start flash heat transfer under relatively low temperature; Long period is utilized solar energy relatively, and basic not contrary circulation losses; Because of ethanol working medium freezing point is low, can play antifreeze effect, simultaneously little, in light weight, safe and reliable, sturdy and durable, the long service life of volume, withstand voltage, environmental protection.
In order to achieve the above object, technical method of the present invention is:
A kind of heat pipe-type flat solar energy heat collector with liquid back pipe comprises a plurality of heat collecting sheets, last lower communicating tube, liquid back pipe; Its heat collecting sheet comprises heat-transfer pipe and is coated with the heat absorbing sheet of sunshine absorption film, the discharging that is parallel to each other and tiles of a plurality of heat collecting sheets;
At least one liquid back pipe is parallel with heat collecting sheet, will go up communicating pipe and lower communicating tube interlinks, and is used for the backflow of condensate liquid;
Last lower communicating tube parallel is put, and is weldingly connected with each heat collecting sheet; Lead to each other the heat-transfer pipe of each heat collecting sheet, last lower communicating tube and liquid back pipe inside, forms confined space, and be filled with liquid working substance in inside by the heat pipe mode;
Last communicating pipe is a sleeve structure, and inner sleeve and heating water tank interlink, and is used for the water of cyclic heating water tank, the outer tube sealed at both ends;
The lower communicating tube sealed at both ends.
Described heat pipe-type flat solar energy heat collector, its said each heat collecting sheet, it simultaneously is coated with the heat absorbing sheet of sunshine absorption film, and heat-transfer pipe is welded on the axis; Heat absorbing sheet is a rectangle, and heat-transfer pipe is welded on the mid point line of rectangle two minor faces, parallels with long limit, and is welded on the non-plated film face.
Described heat pipe-type flat solar energy heat collector, its said a plurality of heat collecting sheet tilings and parallel discharging, heat collecting sheet does not have the space each other, and heat collecting sheet has been arranged the back and has been formed a sunshine heat-absorbent surface.
Described heat pipe-type flat solar energy heat collector, it is said, and to go up lower communicating tube internal diameter be 2～4 times of heat-transfer pipe internal diameter on the heat collecting sheet.
Described heat pipe-type flat solar energy heat collector, its said liquid back pipe length and in heat-transfer pipe identical or approaching on external diameter and the heat collecting sheet.
Described heat pipe-type flat solar energy heat collector, its said liquid working substance is the liquid ethanol under the normal temperature and pressure.
Described heat pipe-type flat solar energy heat collector, it is said to fill by the heat pipe mode, is wholely to fill with the heat pipe form, and the working medium liquid filled ratio is volume ratio 30%-60%.
Described heat pipe-type flat solar energy heat collector, its said last communicating pipe outer tube and the equal in length of lower communicating tube or close, inner sleeve and heating water tank in last communicating pipe interlink, and need heated water mobile in this inner sleeve pipeline.
In view of ordinary flat formula solar energy storage work start-up temperature height; Be prone to shortcomings such as contrary circulation losses; The advantage of a kind of novel pipe flat solar energy heat collector of the present invention is: heat collector can start under relatively low temperature, flash heat transfer, and the long period is utilized solar energy relatively; Solar energy utilization ratio is high, and basic not contrary circulation losses.Because of the freezing point of ethanol working medium is low, can play antifreeze effect, have also simultaneously that volume is little, in light weight, safe and reliable, sturdy and durable, an advantage such as long service life, withstand voltage, environmental protection.
Description of drawings
Fig. 1 is a kind of heat pipe-type flat solar energy heat collector side to light sketch map of the present invention;
Fig. 2 a is a heat collector shady face sketch map of the present invention;
Fig. 2 b is the termination knot composition of last communicating pipe;
Fig. 2 c is a lower communicating tube termination knot composition.
The specific embodiment
A kind of new heat pipe formula panel solar acquisition means with liquid back pipe of the present invention adopts hot pipe technique, has a great difference with the classic flat-plate solar energy heat collector in the version arrangement, refluxes for making things convenient for liquid, and specialized designs has liquid back pipe.
The present invention adopts the multi-disc heat collecting sheet to tile side by side, and links to each other with last lower communicating tube respectively, forms the enclosure space that an inside links to each other; The solar energy that heat collecting sheet absorbs passes to the heat-transfer pipe on each heat collecting sheet, after the working medium in the heat-transfer pipe is heated, undergoes phase transition; Heat passes in the communicating pipe inner layer sleeve after being delivered to communicating pipe; After condensation behind the working medium heat release, condensed liquid are back to lower communicating tube by liquid back pipe, and be assigned in each heat-transfer pipe; Be coated with coating for selective absorption on the extinction face that tiling forms, the absorption that is in sunshine is arranged, can reduce the reflection loss of sunshine, reduce the energy that heat radiation causes simultaneously and scatter and disappear, utilize solar energy to greatest extent.
A kind of heat pipe-type flat solar energy heat collector of the present invention with liquid back pipe:
A) the parallel tiling of a plurality of heat collecting sheets in the heat pipe-type flat solar energy heat collector is placed, and is seamless between each heat collecting sheet.The heat-transfer pipe of each heat collecting sheet two ends up and down welds with last lower communicating tube respectively; Form the space that inside communicates; Last lower communicating tube closed at both ends; And length is identical or close with the heat collecting sheet group length that tiling forms, and is connected with a liquid back pipe in last lower communicating tube end, and caliber is identical or close with heat-transfer pipe caliber on each heat collecting sheet.
B) each heat collecting sheet structure is identical, generally is made up of copper heat-transfer pipe, the rectangle heat absorbing sheet that is coated with coating for selective absorption, and heat-transfer pipe is welded on the minor face line of centres of heat absorbing sheet.
C) whole device is inner links to each other and sealing, and inside is filled with a certain amount of working media.
In the selection of heat-transfer pipe diameter, be benchmark to meet the coupling of conducting heat on last lower communicating tube and the heat collecting sheet, adopting ratio usually is 2: 1～4: 1.As to adopt lower communicating tube be φ 25 * 2, and heat-transfer pipe is φ 10 * 1, and liquid back pipe is identical with heat-transfer pipe or close, and other ratio changes according to application conditions.
Fig. 2 a is a kind of heat pipe-type flat solar energy heat collector shady face sketch map of the present invention, and wherein liquid back pipe 1, the heat absorbing sheet 2 on the heat collecting sheet, the heat-transfer pipe 3 on the heat collecting sheet, last communicating pipe 4, lower communicating tube 5.
Last communicating pipe 4 and lower communicating tube 5 parallel being oppositely arranged, the heat-transfer pipe 3 on a plurality of heat collecting sheets is arranged in parallel, and each heat-transfer pipe all welds with last lower communicating tube; Each heat-transfer pipe inner chamber all communicates with last lower communicating tube, and heat absorbing sheet 2 tilings on the heat collecting sheet are arranged, and are seamless each other; Form the solar energy heat absorbing face; Heat absorbing sheet 2 and heat-transfer pipe 3 axially are welded to connect along heat-transfer pipe, liquid back pipe 1 and heat-transfer pipe 3 parallel placements, and place communicating pipe 4 to link to each other with the end of lower communicating tube 5.
Last communicating pipe 4, lower communicating tube 5, heat-transfer pipe 3 and liquid back pipe 1 material generally are copper, and the heat absorbing sheet material is stainless sheet steel, aluminium sheet or copper coin, and thickness is below 0.5mm.
Fig. 2 b is last communicating pipe 4 and inner layer sleeve 6 structural representations, and plug 7 can be with the termination sealing of last communicating pipe, last communicating pipes 4 end side identical therewith.
Recirculated water communicates with water tank in the inner layer sleeve 6.
Fig. 2 c is lower communicating tube 5 end construction sketch mapes, and plug 8 is with the sealing of lower communicating tube 5 terminations, and lower communicating tube 5 end side are identical therewith.
The heat collector inner chamber is filled with ethanol by the heat pipe mode, and liquid filled ratio is volume ratio 30%-60%.
Operation principle of the present invention is following:
When the present invention used, needing with liquid back pipe 1 was minimum point with lower communicating tube 5 tie points, and lower communicating tube 5 becomes 3-10 ° with the place, so that condensed fluid flow back into lower communicating tube 5 by liquid back pipe 1.When solar irradiation was mapped to flat solar energy heat collector side to light of the present invention, absorber plate 2 absorbed heats, passes to each heat-transfer pipe 3, and the ethanol working medium in the heat-transfer pipe 3 are heated; Undergo phase transition, generate steam, rise in communicating pipe 4; Heated vapor is condensed into liquid after touching the cold inner sleeve 6 in communicating pipe 4, is flow back in the lower communicating tube 5 by liquid back pipe 1; And be assigned in each heat-transfer pipe 3, be heated again, repeat said process; Inner layer sleeve 6 constantly absorbs heat, takes away heat through the recirculated water that communicates with water tank of internal flow again, thereby continues the water in the heating water tank.
Among Fig. 1 and Fig. 2 a, Fig. 2 b, Fig. 2 c, the part illustrative of only the present invention being correlated with, other is like insulation, casing, connecting line, water route circulation, water tanks etc. are well-known, in this omission.
Main part of the present invention is the utilization of special construction heat pipe, for the peripheral improvement of heat pipe, as: 1. be provided with a plurality of liquid back pipes; 2. the augmentation of heat transfer mode in the inner sleeve is like static turbulent etc.; 3. it is unequal to go up lower communicating tube size and length, also is classified as the protection domain of claims of the present invention.
The most reasonably arranging is the heat absorbing sheet arrangement of tiling side by side, but as other form occurs and arrange, also be classified as the protection domain of claims of the present invention.
Claims (8)
1. the heat pipe-type flat solar energy heat collector with liquid back pipe comprises a plurality of heat collecting sheets, last lower communicating tube, liquid back pipe; It is characterized in that: heat collecting sheet comprises heat-transfer pipe and is coated with the heat absorbing sheet of sunshine absorption film, the discharging that is parallel to each other and tiles of a plurality of heat collecting sheets;
At least one liquid back pipe is parallel with heat collecting sheet, will go up communicating pipe and lower communicating tube interlinks, and is used for the backflow of condensate liquid;
Last lower communicating tube parallel is put, and is weldingly connected with each heat collecting sheet;
Lead to each other the heat-transfer pipe of each heat collecting sheet, last lower communicating tube and liquid back pipe inside, forms confined space, and be filled with liquid working substance in inside by the heat pipe mode;
Last communicating pipe is a sleeve structure, and inner sleeve and heating water tank interlink, and is used for the water of cyclic heating water tank, the outer tube sealed at both ends;
The lower communicating tube sealed at both ends.
2. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: said each heat collecting sheet is its heat absorbing sheet that simultaneously is coated with the sunshine absorption film, and heat-transfer pipe is welded on the axis; Heat absorbing sheet is a rectangle, and heat-transfer pipe is welded on the mid point line of rectangle two minor faces, parallels with long limit, and is welded on the non-plated film face.
3. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: said a plurality of heat collecting sheet tilings and parallel discharging, and heat collecting sheet does not have the space each other, and heat collecting sheet has been arranged the back and has been formed a sunshine heat-absorbent surface.
4. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: the said lower communicating tube of going up, internal diameter are 2～4 times of heat-transfer pipe internal diameter on the heat collecting sheet.
5. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: said liquid back pipe length and in heat-transfer pipe identical or approaching on external diameter and the heat collecting sheet.
6. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: said liquid working substance is the liquid ethanol under the normal temperature and pressure.
7. heat pipe-type flat solar energy heat collector as claimed in claim 1 is characterized in that: saidly filling by the heat pipe mode, is wholely to fill with the heat pipe form, and the working medium liquid filled ratio is volume ratio 30%-60%.
8. heat pipe-type flat solar energy heat collector as claimed in claim 1; It is characterized in that: said last communicating pipe outer tube and the equal in length of lower communicating tube or close; Inner sleeve and heating water tank in last communicating pipe interlink, and need heated water in this inner sleeve pipeline, to flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101704446A CN102840693A (en) | 2011-06-23 | 2011-06-23 | Heat pipe type panel solar heat collecting device provided with liquid return pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101704446A CN102840693A (en) | 2011-06-23 | 2011-06-23 | Heat pipe type panel solar heat collecting device provided with liquid return pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102840693A true CN102840693A (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101704446A Pending CN102840693A (en) | 2011-06-23 | 2011-06-23 | Heat pipe type panel solar heat collecting device provided with liquid return pipe |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224800A (en) * | 2018-01-02 | 2018-06-29 | 南京工业大学 | Novel flat plate type solar heat collector |
| CN111854180A (en) * | 2020-07-23 | 2020-10-30 | 南京工业大学 | Cavity type solar flat plate collector and system thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59183254A (en) * | 1983-03-31 | 1984-10-18 | Matsushita Electric Ind Co Ltd | Solar water heater of heat pipe type |
| CN2292257Y (en) * | 1995-03-28 | 1998-09-23 | 于兆范 | Separated heat-pipe solar energy water heater used for all year round |
| CN201779883U (en) * | 2010-09-07 | 2011-03-30 | 黄永年 | Heat pipe type flat plate collector |
| CN102087053A (en) * | 2011-03-04 | 2011-06-08 | 浙江大学 | Solar flat plate collector capable of exchanging heat through micro-channel |
| CN201877453U (en) * | 2010-10-21 | 2011-06-22 | 中国科学技术大学 | Heat-pipe solar energy opto-electrical and opto-thermal comprehensive utilization device |
-
2011
- 2011-06-23 CN CN2011101704446A patent/CN102840693A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59183254A (en) * | 1983-03-31 | 1984-10-18 | Matsushita Electric Ind Co Ltd | Solar water heater of heat pipe type |
| CN2292257Y (en) * | 1995-03-28 | 1998-09-23 | 于兆范 | Separated heat-pipe solar energy water heater used for all year round |
| CN201779883U (en) * | 2010-09-07 | 2011-03-30 | 黄永年 | Heat pipe type flat plate collector |
| CN201877453U (en) * | 2010-10-21 | 2011-06-22 | 中国科学技术大学 | Heat-pipe solar energy opto-electrical and opto-thermal comprehensive utilization device |
| CN102087053A (en) * | 2011-03-04 | 2011-06-08 | 浙江大学 | Solar flat plate collector capable of exchanging heat through micro-channel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224800A (en) * | 2018-01-02 | 2018-06-29 | 南京工业大学 | Novel flat plate type solar heat collector |
| CN111854180A (en) * | 2020-07-23 | 2020-10-30 | 南京工业大学 | Cavity type solar flat plate collector and system thereof |
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Application publication date: 20121226 |