DE19849688A1 - Device for increasing degree of effect of solar collector uses first completely flowed-through absorber in sandwich format with parallel back plate arranged beneath absorber plate - Google Patents
Device for increasing degree of effect of solar collector uses first completely flowed-through absorber in sandwich format with parallel back plate arranged beneath absorber plateInfo
- Publication number
- DE19849688A1 DE19849688A1 DE19849688A DE19849688A DE19849688A1 DE 19849688 A1 DE19849688 A1 DE 19849688A1 DE 19849688 A DE19849688 A DE 19849688A DE 19849688 A DE19849688 A DE 19849688A DE 19849688 A1 DE19849688 A1 DE 19849688A1
- Authority
- DE
- Germany
- Prior art keywords
- absorber
- plate
- back plate
- effect
- solar collector
- 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.)
- Ceased
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
- F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
- F24S10/503—Solar heat collectors using working fluids the working fluids being conveyed between plates having conduits formed by paired plates, only one of which is plane
-
- 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
- F24S10/25—Solar heat collectors using working fluids having two or more passages for the same working fluid layered in direction of solar-rays, e.g. having upper circulation channels connected with lower circulation channels
-
- 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
- F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
-
- 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
Description
Vorrichtung zur Erhöhung des Wirkungsgrades von Sonnenkollektoren durch Verwendung eines Solarabsorbers in Sandwichausführung, bestehend aus drei verschiedenen profilierten Platten, durch deren Zwischenräume zwei entgegensetzt fließende Mediumströme geführt werden, und aus einem Reflexionsspiegel.Device for increasing the efficiency of solar panels Use of a solar absorber in sandwich design, consisting of three different profiled plates, with two spaces in between flowing medium streams are guided, and from a reflection mirror.
Solaranlagen arbeiten nach dem Prinzip der Photovoltaik bzw. Thermik. Gegenstand dieser Erfindung sind die thermischen Solaranlagen.Solar systems work on the principle of photovoltaics or thermals. object of this invention are the thermal solar systems.
Die Absorber von thermischen Solaranlagen bestehen aus einer zur Aufnahme der Sonnenenergie selektiv beschichteten Absorberplatte, die die Sonnenenergie in Wärme umwandelt, aus einem unter der Platte entlanggeführten Wärmetransport medium und aus einer unterschiedlich ausgeführten Wärmeisolierung.The absorbers of thermal solar systems consist of one for receiving the Solar energy selectively coated absorber plate, which the solar energy in Converted heat from a heat transfer along the plate medium and made of different types of thermal insulation.
Verschiedene technische Ausführungen eines Absorbers unterscheiden sich neben der Art der Beschichtung und Isolierung besonders durch die Art und Weise, in der das Wärmetransportmedium durch den Absorber geführt wird. Abhängig von der Qualität und Quantität des Kontakts zwischen Absorberplatte und Wärmetransport medium treten hier nennenswerte Energieverluste durch Abstrahlung auf. Diese Energieverluste fallen hauptsächlich deshalb an, weil die Kontaktfläche, die für die direkte Wärmeübertragung zur Verfügung steht, durch die jeweilige bauliche Ausführung limitiert ist.Different technical designs of an absorber also differ the type of coating and insulation, particularly the way in which the heat transfer medium is passed through the absorber. Depends on the Quality and quantity of contact between absorber plate and heat transfer medium there are significant energy losses due to radiation. This The main reason for energy losses is because the contact area required for the direct heat transfer is available through the respective structural Execution is limited.
Da der Wirkungsgrad einer Solaranlage entscheidend vom Umfang der auftretenden Energieverluste bestimmt wird und der Absorber in dieser Hinsicht eine Schwachstelle der gesamten Solaranlage darstellt, konzentriert sich die neue Vorrichtung auf die Optimierung seiner baulichen Ausführung. Beim derzeitigen Stand der Technik (galvanisch aufgebrachte Selektivbeschichtung) sind die Energieverluste durch Reflexion am Absorberblech bereits auf weniger als 15% reduziert. Weitere Energieverluste an den Seiten des Absorberrahmens und an der unteren Absorberseite verringern jedoch immer noch in erheblichem Maße den Gesamtwirkungsgrad jeder Solaranlage. Letztere sind der Gegenstand der hier dargelegten Optimierung.Because the efficiency of a solar system depends crucially on the extent of the Energy loss is determined and the absorber in this regard Represents the weak point of the entire solar system, the new is concentrated Device to optimize its construction. At the current State of the art (electroplated selective coating) Energy losses due to reflection on the absorber sheet already less than 15% reduced. Further energy losses on the sides of the absorber frame and on the lower absorber side, however, still reduce the Overall efficiency of every solar system. The latter are the subject of here optimization outlined.
Die Neuheit der Vorrichtung besteht darin, daß dem Wärmetransportmedium das gesamte zwischen zwei Platten befindliche Hohlraumvolumen für die Durchströmung zur Verfügung gestellt wird.The novelty of the device is that the heat transfer medium total void volume between two plates for the flow is made available.
Um Turbulenzen bei der Durchströmung zu vermeiden und den Kontakt des aufgeheizten Wärmetransportmediums mit der unteren Rückenplatte wegen der hier auftretenden Energieverluste zu minimieren, befindet sich zwischen den zwei Platten eine weitere profilierte oder ebene Platte. Diese trennt das Wärmemedium in einen oberen und einen unteren Strom, welche in entgegengesetzter Richtung aneinander vorbei fließen, getrennt durch das Profil der Zwischenplatte.In order to avoid turbulence in the flow and the contact of the heated heat transfer medium with the lower back plate because of the here To minimize energy losses that occur is between the two plates another profiled or flat plate. This separates the heat medium into one upper and a lower current, which face each other in opposite directions flow past, separated by the profile of the intermediate plate.
Der untere Wärmestrom ist dabei immer der vom Wärmeaustauscher zurück kehrende, abgekühlte Teil.The lower heat flow is always that of the heat exchanger back sweeping, cooled part.
Durch gezielte Profilierung der Zwischenplatte im Zickzack- bzw. Wellensystem (aber auch in der ebenen Ausführung) hat die Rückenplatte über ihre gesamte Fläche ausschließlich direkten Kontakt mit diesem kühleren Teil des Wärmestroms, an der Absorberrückenplatte treten daher nur noch geringfügige Strahlungsverluste auf.Through targeted profiling of the intermediate plate in a zigzag or wave system (but even in the flat version) the back plate has over its entire surface only direct contact with this cooler part of the heat flow at which The absorber back plate therefore only has slight radiation losses.
An der tiefsten Stelle des Kollektors wird der untere dann in den oberen Wärmestrom umgeleitet. Dieser benetzt vollständig die Unterseite der Absorberplatte und hat gleichzeitig über die Fläche des Profils direkten Kontakt zum unteren Mediumstrom der dadurch leicht vorgewärmt wird.At the lowest point of the collector, the lower one then flows into the upper heat flow redirected. This completely wets the underside of the absorber plate and has at the same time direct contact to the lower medium flow over the surface of the profile which is slightly preheated.
Die Absorberrückentemperatur bleibt relativ niedrig, nur wenig Energieverluste treten auf. Damit sinken die Ansprüche an die Effektivität der unteren Absorberisolierung in Bezug auf Mächtigkeit und Materialeigenschaften ganz entschieden gegenüber den Ansprüchen an herkömmliche Absorber.The absorber back temperature remains relatively low, with little energy loss on. This lowers the demands on the effectiveness of the lower absorber insulation In terms of thickness and material properties, it was decidedly different from the Demands on conventional absorbers.
Durch Verwendung eines Reflexionsspiegels in geringer Entfernung unterhalb der Rückenplatte erübrigt sich bei der neuen Vorrichtung jegliche Isolierung mit Mineralwolle u. ä.By using a reflection mirror a short distance below the Back plate is no longer necessary with the new device Mineral wool u. Ä.
Der Vorteil der neuen Vorrichtung ergibt sich aus der optimalen Nutzung der Sonnenenergie (erhöhte Wärmeaufnahme), aus der Einsparung von Isolier materialien und daraus resultierender längerer Lebensdauer des Kollektors sowie aus verbesserten Recyclingmöglichkeiten, da herkömmliche Isolierungen häufig noch ökologisch problematische Materialien enthalten.The advantage of the new device results from the optimal use of the Solar energy (increased heat absorption), from the saving of insulation materials and the resulting longer service life of the collector as well from improved recycling options, since conventional insulation is often still contain ecologically problematic materials.
Genannt werden soll weiterhin die Reduzierung der Kollektormächtigkeit, die durch das Wegfallen der Isolierschicht mehr als 50% betragen kann.The reduction in collector thickness caused by the loss of the insulating layer can amount to more than 50%.
Durch die Verbesserung des Wirkungsgrades entwickeln sich die technischen Ausmaße der Solaranlagen sehr zugunsten der Verbraucher.By improving the efficiency, the technical ones develop Dimensions of the solar systems very much in favor of consumers.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19849688A DE19849688A1 (en) | 1998-10-28 | 1998-10-28 | Device for increasing degree of effect of solar collector uses first completely flowed-through absorber in sandwich format with parallel back plate arranged beneath absorber plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19849688A DE19849688A1 (en) | 1998-10-28 | 1998-10-28 | Device for increasing degree of effect of solar collector uses first completely flowed-through absorber in sandwich format with parallel back plate arranged beneath absorber plate |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19849688A1 true DE19849688A1 (en) | 2000-05-11 |
Family
ID=7885922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19849688A Ceased DE19849688A1 (en) | 1998-10-28 | 1998-10-28 | Device for increasing degree of effect of solar collector uses first completely flowed-through absorber in sandwich format with parallel back plate arranged beneath absorber plate |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19849688A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1451507A2 (en) * | 2001-10-01 | 2004-09-01 | Futura Solar, Inc. | Structurally integrated solar collector |
-
1998
- 1998-10-28 DE DE19849688A patent/DE19849688A1/en not_active Ceased
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1451507A2 (en) * | 2001-10-01 | 2004-09-01 | Futura Solar, Inc. | Structurally integrated solar collector |
EP1451507A4 (en) * | 2001-10-01 | 2006-08-02 | Futura Solar Inc | Structurally integrated solar collector |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8131 | Rejection |