Fur-like photothermal converter surface

Details Fur-like photothermal converter surface Fur-like photothermal converter surface

F - Mech Eng,Light,Heat,Weapons

24

J

60/40, 126/11.14

F24J 2/48 (2006.01) F24J 2/04 (2006.01) F24J 2/46 (2006.01)

Patent

CA 1063464

FUR-LIKE PHOTOTHERMAL CONVERTER SURFACE ABSTRACT OF THE DISCLOSURE In order to reduce energy losses by convection and/or thermal radiation from the radiation-absorbing surface of a photothermal energy converter for the utilisation of solar energy, the said surface is provided with a multiplicity of projecting fibres sufficiently close to one another to suppress convection, each fibre consisting of a material which is permeable to the incident luminous radiation to be absorbed and at least partly opaque to infrared thermal radiation which may be reemitted from the said surface whereby energy losses by radiation are reduced. The fibres can be, for example, glass or plastics fibres and can be integral with or implanted in the said surface. Preferably, the fibres have diameters in the range 25 to 500 micrometers, a height of the order of 5 cm, and an average distance between fibres in the range 100 to 5000 micrometers.

269299

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