CA2227297A1 - Heat-pipe heat exchanger for solar energy collector - Google Patents
Heat-pipe heat exchanger for solar energy collector Download PDFInfo
- Publication number
- CA2227297A1 CA2227297A1 CA002227297A CA2227297A CA2227297A1 CA 2227297 A1 CA2227297 A1 CA 2227297A1 CA 002227297 A CA002227297 A CA 002227297A CA 2227297 A CA2227297 A CA 2227297A CA 2227297 A1 CA2227297 A1 CA 2227297A1
- Authority
- CA
- Canada
- Prior art keywords
- inner space
- pipe
- working substance
- heat
- channels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/90—Solar heat collectors using working fluids using internal thermosiphonic circulation
- F24S10/95—Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
-
- 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
Abstract
A heat-pipe heat exchanging structure for use in solar energy collectors. The heat exchanging structure comprises corrugated sheet absorbent, cover plate and pipe led out and capable of transporting flowing working substance. The corrugated sheet absorbent connects to the cover plate by forming parallel channels and enclosing a closed inner space, the pipe capable of transporting flowing working substance crosses the channels by maintaining the enclosure of the inner space, and there is saturated vapour in the closed inner space. The saturated vapour can be that of a low-boiling liquid, for instance alcohol, or water vapour at low pressure. The pipe capable of transporting flowing working substance may cross the channels either inside or outside the inner space.
Description
HEAT-PIPE HEAT EXCHANGER FOR SOLAR ENERGY COLLECTOR
Field of the Invention The present invention relates to heat exchangers, and more particularly to a solar pcmel heat exchanger.
Backg~round of the Invention As a general solution for planar solar energy collectors, under the cover plate that reflects beams with a wave length above 3 micrometers there is a sunbeam absorbing surface that absorbs beams with a wave length below 3 micrometers and transforms them into heat, but is little inclined to thermal emission. From the 15 absorbing surface of the solar panel, heat is transferred directly to the flowing working substance due to intim~te contact between the flowing working substance and the absorbiing surface; the heated flowing working fluid then being removed. The heat exchanger created by connecting the absorbing surface and the flowing working agent is separated from the environment by solid heat insulation from below, and by air gap 20 from albove, from the direction of the solar radiation.
Several solutions are available to improve the efficiency of the heat exchanger.The formation of such a heat exchanger is described for instance by German utility model No. G 93 13124. When the heat exchanger is insulated from its environment 25 by vacuum, efficiency improves, since the heat loss is reduced. Patent description No.
DE 3611764 describes the formation of a vacuum plane collector, but it has the drawbiack that a lot of supporting rods are necessary to ensure proper pressure-tightness and mechanical strength. Patent description No. DE 4007839, Fig. 8 describes the formation of another vacuum plane collector. The main point of the30 solutic,n is that the absorbing surface is provided with double wall cover, divided into cells that let through the sunbeams. Vacuum is produced in the cells. Mechanical strength and pressure-tightness is ensured by the suitaLbly small size of the cells and the cun~ed design of their inner side.
The disadvantage of these solutions is the dependence on sunshine according 5 to the weather and, through this, the temperature change of the working substance in a low and wide range. This is elimin~tecl by the heat-pipe heat-exchanger solar energy collector structure that uses the known vacuum pipes. According to this solution, the working substance that flows in the heat exchanger is heated by the condensation heat of the heat pipes that connect to the absorbent surface located co-axially inside the 10 vacuum pipes which let the sunbeams through. Compared to plane collectors, this structure, which is comprised of separate co-axial pipes, is sophisticated and is expensive to produce, and needs additional elements to achieve proper mechanical strength.
15 3. Brief Summary of the Invention The solution described herein is intended to elimin~te the disadvantage of costly m~nllf~cture inherent in creating co-axial piping, yet has a simple construction, is cost-effective to produce, has proper mechanical strength in itself, and can be used 20 for normal plane collectors.
We have recognized that a structure forming heat pipes can be created with the proper geometric formation of the absorbent sheet normally used in plane collectors, and that the connection of the pipe capable of delivering the working substance 25 flowing to this structure enables condensation heat exchange of given temperature.
The heat exch~nging structure according to the invention contains corrugated sheet absorbent, cover plate, and pipe let out and capable of transporting the flowing working agent. The corrugated sheet absorbent connects to the cover plate by making 30 parallel channels and enclosing a closed internal area, the pipe capable of transporting the flowing working substance crosses the channels by m~int~ining the enclosure of the inner space, and there is saturated vapour in the closed inner space. The saturated steam c an be that of a low-boiling liquid, eg. alcohol, or can be water vapour at low pressure. The pipe capable of transporting the flowing working substance may cross the channels either inside or outside the inner space.
s The heat exch~nging structure with the above forrnation is simple, easy and cheap to produce, has proper mechanical strength, and can be applied in plane collectors.
Brief Dcse. ;~,lion of the D. .. ~
The details of the sarnple are demonstrated by an advantageous execution example, according to the figures.
Fig. 1 is the plan view of the heat exch~n~ing structure of the present 1 5 invention;
Fig. 2 is the side view of the heat exch~nging structure of Fig. l; and Fig. 3 is a section taken along plane A-A of the heat exch~nging structure of Fig. 1.
Detailed De~ lion of the Invention The absorbent 1 of the heat exchanger in this example is a corrugated sheet made of copper or aluminum alloy, produced by pressing, practicably framed by plane edges. The cover plate 2 connects to the absorbent 1 by lap seam welding, enclosing, 25 by a surface side of the absorbent 1, a closed inner space 3 including parallel channels 4. In the inner space 3, there is .. fixed by welding in a way to m~int~in the enclosure of the inner space -- one straight pipe 5 perpendicularly crossing the parallel channels 4 pracl:ically near an end, capable of transporting the flowing working substance therewithin, and leading away from the heat exchanger so as to permit transport of the 30 heated flowing working substance away from the heat exchanger of the present inventiion. In the inner space 3 vacuurn is produced with the usual methods, so there is low-]pressure saturated water vapour in the inner space 3. Expediently, a pressure meter 6 that can be read from outside is connected to the inner space 3.
With the operation of the heat exch~nging structure placed non-horizontally, 5 the channels 4 in the closed inner space 3 function as heat exchanger as effected by sunshine. The uprising vapour continuously condenses on the wall of the pipe 5 delivering the working substance which is in the upper part of the heat exch~nging structure, and thereby transfers the condensation heat at a temperature being independent in a wide range of the sunshine strength. With the adjustment of the10 working substance flow, the working substance will have the required temperature due to the heat exchange. The pressure of the inner space 3 can be continuously monitored on the pressure meter 6.
In other examples for execution design, the cover plate is connected to the 15 absorbent 1 by pressing and/or bonding.
In other examples of execution design, the saturated vapour is that of a low-boiling alcohol, preferably methanol.
The heat exch~nging structure according to the invention has a simple construction, has proper mechanical strength in itself, and is cost-effective to produce.
It is advantageous to use in plane collectors. Compared to normal plane collectors, it has improved efficiency, its operating method excludes the overheating of the working surface. It is capable of heat exch~nging at given temperature even in case of low environmental temperature and weak sunshine.
Field of the Invention The present invention relates to heat exchangers, and more particularly to a solar pcmel heat exchanger.
Backg~round of the Invention As a general solution for planar solar energy collectors, under the cover plate that reflects beams with a wave length above 3 micrometers there is a sunbeam absorbing surface that absorbs beams with a wave length below 3 micrometers and transforms them into heat, but is little inclined to thermal emission. From the 15 absorbing surface of the solar panel, heat is transferred directly to the flowing working substance due to intim~te contact between the flowing working substance and the absorbiing surface; the heated flowing working fluid then being removed. The heat exchanger created by connecting the absorbing surface and the flowing working agent is separated from the environment by solid heat insulation from below, and by air gap 20 from albove, from the direction of the solar radiation.
Several solutions are available to improve the efficiency of the heat exchanger.The formation of such a heat exchanger is described for instance by German utility model No. G 93 13124. When the heat exchanger is insulated from its environment 25 by vacuum, efficiency improves, since the heat loss is reduced. Patent description No.
DE 3611764 describes the formation of a vacuum plane collector, but it has the drawbiack that a lot of supporting rods are necessary to ensure proper pressure-tightness and mechanical strength. Patent description No. DE 4007839, Fig. 8 describes the formation of another vacuum plane collector. The main point of the30 solutic,n is that the absorbing surface is provided with double wall cover, divided into cells that let through the sunbeams. Vacuum is produced in the cells. Mechanical strength and pressure-tightness is ensured by the suitaLbly small size of the cells and the cun~ed design of their inner side.
The disadvantage of these solutions is the dependence on sunshine according 5 to the weather and, through this, the temperature change of the working substance in a low and wide range. This is elimin~tecl by the heat-pipe heat-exchanger solar energy collector structure that uses the known vacuum pipes. According to this solution, the working substance that flows in the heat exchanger is heated by the condensation heat of the heat pipes that connect to the absorbent surface located co-axially inside the 10 vacuum pipes which let the sunbeams through. Compared to plane collectors, this structure, which is comprised of separate co-axial pipes, is sophisticated and is expensive to produce, and needs additional elements to achieve proper mechanical strength.
15 3. Brief Summary of the Invention The solution described herein is intended to elimin~te the disadvantage of costly m~nllf~cture inherent in creating co-axial piping, yet has a simple construction, is cost-effective to produce, has proper mechanical strength in itself, and can be used 20 for normal plane collectors.
We have recognized that a structure forming heat pipes can be created with the proper geometric formation of the absorbent sheet normally used in plane collectors, and that the connection of the pipe capable of delivering the working substance 25 flowing to this structure enables condensation heat exchange of given temperature.
The heat exch~nging structure according to the invention contains corrugated sheet absorbent, cover plate, and pipe let out and capable of transporting the flowing working agent. The corrugated sheet absorbent connects to the cover plate by making 30 parallel channels and enclosing a closed internal area, the pipe capable of transporting the flowing working substance crosses the channels by m~int~ining the enclosure of the inner space, and there is saturated vapour in the closed inner space. The saturated steam c an be that of a low-boiling liquid, eg. alcohol, or can be water vapour at low pressure. The pipe capable of transporting the flowing working substance may cross the channels either inside or outside the inner space.
s The heat exch~nging structure with the above forrnation is simple, easy and cheap to produce, has proper mechanical strength, and can be applied in plane collectors.
Brief Dcse. ;~,lion of the D. .. ~
The details of the sarnple are demonstrated by an advantageous execution example, according to the figures.
Fig. 1 is the plan view of the heat exch~n~ing structure of the present 1 5 invention;
Fig. 2 is the side view of the heat exch~nging structure of Fig. l; and Fig. 3 is a section taken along plane A-A of the heat exch~nging structure of Fig. 1.
Detailed De~ lion of the Invention The absorbent 1 of the heat exchanger in this example is a corrugated sheet made of copper or aluminum alloy, produced by pressing, practicably framed by plane edges. The cover plate 2 connects to the absorbent 1 by lap seam welding, enclosing, 25 by a surface side of the absorbent 1, a closed inner space 3 including parallel channels 4. In the inner space 3, there is .. fixed by welding in a way to m~int~in the enclosure of the inner space -- one straight pipe 5 perpendicularly crossing the parallel channels 4 pracl:ically near an end, capable of transporting the flowing working substance therewithin, and leading away from the heat exchanger so as to permit transport of the 30 heated flowing working substance away from the heat exchanger of the present inventiion. In the inner space 3 vacuurn is produced with the usual methods, so there is low-]pressure saturated water vapour in the inner space 3. Expediently, a pressure meter 6 that can be read from outside is connected to the inner space 3.
With the operation of the heat exch~nging structure placed non-horizontally, 5 the channels 4 in the closed inner space 3 function as heat exchanger as effected by sunshine. The uprising vapour continuously condenses on the wall of the pipe 5 delivering the working substance which is in the upper part of the heat exch~nging structure, and thereby transfers the condensation heat at a temperature being independent in a wide range of the sunshine strength. With the adjustment of the10 working substance flow, the working substance will have the required temperature due to the heat exchange. The pressure of the inner space 3 can be continuously monitored on the pressure meter 6.
In other examples for execution design, the cover plate is connected to the 15 absorbent 1 by pressing and/or bonding.
In other examples of execution design, the saturated vapour is that of a low-boiling alcohol, preferably methanol.
The heat exch~nging structure according to the invention has a simple construction, has proper mechanical strength in itself, and is cost-effective to produce.
It is advantageous to use in plane collectors. Compared to normal plane collectors, it has improved efficiency, its operating method excludes the overheating of the working surface. It is capable of heat exch~nging at given temperature even in case of low environmental temperature and weak sunshine.
Claims (6)
1. A heat-pipe heat exchanging structure for use in solar energy collector, including corrugated sheet absorbent, cover plate and pipe led out and capable of transporting flowing working substance, characterized in that the corrugated sheet absorbent connects to the cover plate by forming parallel channels and enclosing a closed inner space, the pipe capable of transporting flowing working substance crosses the channels by maintaining the enclosure of the inner space, and there is saturated vapour in the closed inner space.
2. The structure according to claim 1 is characterized in that the saturated vapour is that of a low-boiling liquid.
3. The structure according to claim 1 is characterized in that the saturated vapour is water vapour at low pressure.
4. The structure according to claim 1 characterized in that the pipe capable of transporting the flowing working substance crosses the channels in the closed inner space.
5. The structure according to claim 2 characterized in that the pipe capable of transporting the flowing working substance crosses the channels in the closed inner space.
6. The structure according to claim 3 characterized in that the pipe capable of transporting the flowing working substance crosses the channels in the closed inner space.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702080A DE19702080A1 (en) | 1997-01-22 | 1997-01-22 | Flat heat exchanger for solar collector |
| DEGE19702080.1 | 1997-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2227297A1 true CA2227297A1 (en) | 1998-07-22 |
Family
ID=7817991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002227297A Abandoned CA2227297A1 (en) | 1997-01-22 | 1998-01-19 | Heat-pipe heat exchanger for solar energy collector |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2227297A1 (en) |
| DE (1) | DE19702080A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235760A (en) * | 2011-06-24 | 2011-11-09 | 东南大学 | Separated flat heat pipe solar water heater |
| CN102506597A (en) * | 2008-11-03 | 2012-06-20 | 赵耀华 | Platy heat pipe and processing technology thereof |
| CN105241093A (en) * | 2014-07-11 | 2016-01-13 | 北京帅鑫博朗科技发展有限公司 | Efficient heat collecting and heat transmitting planar solar panel core and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0111993D0 (en) * | 2001-05-17 | 2001-07-04 | Lamb Leo | An improved solar collector panel |
-
1997
- 1997-01-22 DE DE19702080A patent/DE19702080A1/en not_active Withdrawn
-
1998
- 1998-01-19 CA CA002227297A patent/CA2227297A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506597A (en) * | 2008-11-03 | 2012-06-20 | 赵耀华 | Platy heat pipe and processing technology thereof |
| CN102235760A (en) * | 2011-06-24 | 2011-11-09 | 东南大学 | Separated flat heat pipe solar water heater |
| CN105241093A (en) * | 2014-07-11 | 2016-01-13 | 北京帅鑫博朗科技发展有限公司 | Efficient heat collecting and heat transmitting planar solar panel core and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19702080A1 (en) | 1998-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4513732A (en) | Passive integral solar heat collector system | |
| AU2013270295B2 (en) | Solar photo-thermal receiving device | |
| CN102954601A (en) | Pantile solar concentration heat collector | |
| US4335706A (en) | Energy collector and transfer apparatus | |
| KR100692949B1 (en) | Solar Wavy-Absorber for Evacuated Tubular Solar Collector | |
| CA2227297A1 (en) | Heat-pipe heat exchanger for solar energy collector | |
| CN2384176Y (en) | Heat pipe solar heat collector | |
| US20230383997A1 (en) | Light-splitting reflection high-concentration photovoltaic photothermal integrated cavity receiver | |
| CN103574933A (en) | Heating medium superconductive tube sheet integrated collector | |
| US20030196652A1 (en) | Solar energy collector system | |
| KR101233976B1 (en) | Condenser for solar heat absorber of vacuum tube type for concentrating sunlight having curvature type reflector | |
| CN102042578A (en) | Concentrating solar steam boiler | |
| RU2450217C2 (en) | Heat receiving panel of solar collector | |
| KR100970861B1 (en) | Flat type solar heat collector having double vacuum tube | |
| CN211011964U (en) | Solar energy collecting and utilizing device | |
| CN202955881U (en) | Heating medium superconducting tube plate integration collector | |
| KR100340625B1 (en) | Integral plate type absorber plate of flat plate solar collector and manufacturing method of it | |
| JPS5828901B2 (en) | solar collector | |
| KR20120113632A (en) | Condenser for solar heat absorber of vacuum tube type for concentrating sunlight having uneven type reflector | |
| KR101207952B1 (en) | Piping connection of large size solar collector | |
| KR200263373Y1 (en) | Solar collector having a heat exchanger of double tube type | |
| CN217844330U (en) | Solar vacuum heat collecting tube and solar water heater | |
| KR200438722Y1 (en) | Heat transducer for solar concentrator module | |
| JPS6315739Y2 (en) | ||
| CN206113380U (en) | Heat tube type all -glass vacuum solar collector tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |