Solar radiation energy collector - has liquid circulated between glass sheets and contg. suspension of carbon particles giving large absorption and contact area

摘要

The solar energy collector is formed of two sheets of glass spaced apart and sealed by a strip of elastic material. A fluid coloured black by a suspension of carbon particles circulates through the space thus formed. It enters the space by a tube through the lower part of the elastic strip and leaves by a tube through the upper part of the elastic strip. When the assembly is exposed to sunlight the carbon absorbs radiation and heats the liquid by direct contact. There is a large total surface available both for absorption of radiation and for heat exchange. The fluid circulates by natural convection and flows through the heating coil of a heat exchanger to give up its heat.