Inventors:
Eben J. Gramer - Golden CO
Melvin O. Johnson - Littleton CO
International Classification:
F24J 302
Abstract:
A method of heating a liquid and a solar heating panel therefor is disclosed. The method comprises forming one or more obstruction free, longitudinally extending liquid passageways one side of each passageway being formed from a metallic material whereon the outer surface of said metallic material contains a solar radiation heat absorbing coating and each passageway has a width to depth ratio varying between approximately 6. 5 to 15 and a mean hydraulic radius varying between approximately 0. 018 to 0. 027, exposing the solar radiation heat absorbing coating to solar radiation energy, and heating a liquid by passing said liquid through said passageway and simultaneously maintaining a substantially constant cross-sectional area flow path through said passageway. By such means the liquid is accelerated as same flows from one end of said passageway to the other end. The liquid is passed through said passageway while maintaining a laminar or non-turbulent flow therethrough.