THERMOSTATICALLY COLNTROLLED NON-TRACKING TYPE SOLAR ENERGY HEATING SYSTEM

摘要

1524694 Solar heating NATIONAL AERONAUTICS & SPACE ADMINISTRATION 11 Nov 1975 [22 Nov 1974] 46565/75 Heading F4L A solar energy heating system comprises at least one cylindrical Fresnel lens 10 mounted above a plurality of elongated fluid channels C. The channels are disposed in the East-West direction and are interconnected by inlet and outlet headers. Each channel has a separate thermostatically controlled valve (32, Fig. 2) which only allows fluid flow through the channel when the valve senses a temperature above a preselected temperature. The valve may have a bimetallic snap action element; or the valve may proportionately control the fluid flow rate as a function of temperature. The channels are preferably V-shaped; may either be on a curved surface (as shown) or on a plane surface (Fig. 1, not shown); may either be spaced apart or welded together; or may either be of identical size and shape or the outer channels Cx, Cy may be wider than the central channel Cc. The lenses 10 are preferably disposed in an East-West array (Fig. 3, not shown). The surfaces of the channels exposed to the sun's rays may be covered with a coating of silicon carbide or combinations of molybdenum and silicon oxides. The working fluid may be water, ethylene glycol or an organic compound.