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Thermal Losses in Sealed, Gas-filled Flat Plate Solar Collectors

Johan Vestlund (Institutionen för energi och miljö, Installationsteknik) ; Jan-Olof Dalenbäck (Institutionen för energi och miljö, Installationsteknik) ; Mats Rönnelid
ISES Solar World Congress 2007 Proceedings (2007)
[Konferensbidrag, övrigt]

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.

Nyckelord: solfångare



Denna post skapades 2008-01-01. Senast ändrad 2008-01-01.
CPL Pubid: 64023

 

Institutioner (Chalmers)

Institutionen för energi och miljö, Installationsteknik (2005-2014)

Ämnesområden

Övrig annan teknik

Chalmers infrastruktur