AT12607U1 - COMBINATION COLLECTOR - Google Patents

Abstract

Solar collector (1) for the combination of solar thermal energy and photovoltaic, wherein the solar collector (1) has a partially transparent photovoltaic module (2) in thin-film technology on the inlet side (3) and behind the photovoltaic module (2) on the side facing away from the inlet side (3) there is a solar absorber (4).

Description

Austrian Patent Office AT12 607U1 2012-08-15

description

COMBINATION COLLECTOR

The invention relates to a solar collector for solar thermal and photovoltaic.

From DE 102 07 852 A1, a solar collector is known in which a photovoltaic element is arranged between the solar thermal absorber and the glass pane on the side facing the light. The solar thermal absorber cools the photovoltaic element so that it can achieve a higher electrical efficiency. To prevent an electrical short circuit, there is an electrical insulation between the solar thermal absorber and the photovoltaic element. In such a structure, the solar thermal absorber can only absorb the heat that is transmitted from the photovoltaic element via the insulation on the way of heat conduction.

The invention has for its object to provide solar collector for combination of solar thermal and photovoltaic, which is characterized by compact design and both high electrical and thermal efficiency.

This is achieved according to the features of independent claim 1, characterized in that a solar collector has a partially transparent photovoltaic module in thin-film technology on the inlet side and behind the photovoltaic module on the side facing away from the inlet side is a solar absorber. As a result, on the one hand reduces the height compared to the prior art and on the other hand increases the thermal efficiency. In addition, the use of thin-film technology achieves a significant saving in the raw material silicon.

In conventional photovoltaic modules crystalline silicon is used. The absorption of the light takes place in a relatively thin surface layer (about 10 pm), so that a relatively large part of the crystalline silicon layer is not required for absorption.

In thin-film technology, an approximately 1 μm thick layer of amorphous silicon is applied to a substrate in physical (PVD) or chemical (CVD) processes.

By means of the CSG process (Crystalline Silicon on Glass) crystalline thin-film cells can be applied with less than two microns thin silicon layers directly on a glass slide. By means of laser and inkjet printing technology, the power supply is applied.

Thin-film solar cells made of black silicon achieve a particularly high efficiency.

Advantageous embodiments of the invention will become apparent from the features of the dependent claims.

The invention will now be explained in detail with reference to FIG.

The figure shows a solar collector 1 with a photovoltaic module 2 on the inlet side 3, which faces the solar radiation after installation, and a solar absorber 4, which is located behind the photovoltaic module 2 on the side facing away from the inlet side 3. The photovoltaic module 2 has a partially transparent thin-film layer 5 vapor-deposited on a substrate in the form of a glass plate 14, which preferably consists of amorphous silicon. On the inlet side 3, another glass plate 13 covers the thin layer 5. The solar absorber 4 consists of a copper tube 12 which is welded to an aluminum sheet 11. Behind the solar absorber 4 on the side facing away from the inlet side 3, a thermal insulation 7 is arranged. On the inlet side 3 facing side of the thermal insulation 7 is a heat reflection film 6, which preferably comprises aluminum and / or gold and / or silver arranged.

The copper tube 12 of the solar absorber 4 is connected via a circulation pump 8 with a heat- 1 / third

Claims (4)

Austrian Patent Office AT12 607U1 2012-08-15 meaustauscher 9 connected. This heat exchanger 9 is in turn connected to a heating system not shown in detail. The thin film 5 is connected to an inverter 10. During operation of the solar collector 1 thermal radiation passes through the upper glass pane 13 on the thin film 5 of the photovoltaic module 2. The produced power is passed to the inverter 10 and fed into an electrical network. Part of the heat radiation penetrates the partially transparent thin layer 5 and the lower glass plate 14 and reaches the solar absorber 4, which heats up and forwards heat via a fluid in the copper tube 12 by means of the circulation pump 8 to the heat exchanger 9. There, the heat is transferred to any heat consumer, such as a heating and / or hot water. The thermal insulation 7 prevents heat conduction via larger heat losses can reach the environment. The heat reflection film 6 ensures that the heat losses via radiation from the solar absorber 4 are minimized. Instead of the upper glass plate 13 and a transparent film, the thin film 5 can protect. As a film, for example, an ETFE films (ethylene-tetrafluoroethylene) of thickness 0. 2.mm serve. Claims 1. A solar collector (1) for the combination of solar thermal and photovoltaic, wherein the solar collector (1) via a partially transparent photovoltaic module (2) in thin-film technology on the inlet side (3) and behind the photovoltaic module (2) on the inlet side (3 ) facing away from a solar absorber (4), characterized in that the photovoltaic module (2) has a on a substrate, preferably a glass plate, vapor-deposited semi-transparent thin film (5) made of amorphous silicon. 2. Solar collector (1) according to claim 1, characterized in that behind the solar absorber (4) on the inlet side (3) facing away from a heat reflection film (6) is arranged. 3. Solar collector (1) according to one of claims 1 or 2, characterized in that behind the solar absorber (4) on the inlet side (3) facing away from a thermal insulation (7) is arranged. 4. Solar collector (1) according to claim 2 and 3, characterized in that the heat reflection film (6) on the inlet side (3) facing side of the thermal insulation (7) is arranged. 1 sheet of drawings 2/3