Importance

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Abstract

A solar water heating system including a solar collector panel and a combination storage tank and heat exchanger unit for receiving liquid heated in the solar collector panel. The collector panel includes a collector plate made from a pair of steel plates welded together and having a heat absorbing porcelain glass coating on the surface thereof which is exposed to the suns rays. The heat exchanger unit is comprised of a storage tank containing the water to be heated and a plurality of vertically extending heat exchange tubes mounted inside and sealed from the water in the storage tank. The liquid heated in the collector plate is circulated by a pump unit through a first conduit connected between the bottom of the heat exchange tubes and the inlet of the collector plate and through a second conduit from the outlet of the collector plate to the top of the heat exchange tubes. An air transfer conduit is connected in parallel flow relationship with the second conduit to facilitate complete and rapid drainage of the collector plate and exposed piping when the circulation pump is shut off.

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First Claim