Thermal Losses in Sealed, Gas-filled Flat Plate Solar Collectors
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2007

A sealed space between absorber and cover glass makes it possible reducing the influence of humidity condensate and dust at the same time as the enclosed space can be filled with a suitable gas for lowering the losses. This paper is about the size of the losses in these collectors. A calculating model of a gas-filled flat plate solar collector was built in Matlab with standard heat transfer formulas. It showed that the total loss can be reduced up to 20% when changing to an inert gas. It is also possible using a much shorter distance and still achieve low losses at the same time as the mechanical stresses in the material is reduced.

solfångare

Författare

Johan Vestlund

Chalmers, Energi och miljö, Installationsteknik

Jan-Olof Dalenbäck

Chalmers, Energi och miljö, Installationsteknik

Mats Rönnelid

ISES Solar World Congress 2007 Proceedings

Ämneskategorier

Övrig annan teknik