Solar heating cell

Solar energy gathering system including, in combination:

• a. cell means including a generally solar transmissive enclosed fluid retaining zone with length and width dimensions substantially greater than the thickness dimension, and with an inclined flat plate disposed for solar viewing and forming one wall of said enclosure and having an inlet and an outlet for the transfer of fluid energy transfer medium therethrough, surface means including said flat solar transmissive plate comprising the solar viewing wall of said cell means, an opaque solar radiation responsive plate forming a backing plate for said cell means, and with said solar viewing wall and said backing plate being arranged to support, retain and expose said fluid energy transfer medium contained therein to incident solar energy;
• b. a fluid energy transfer medium arranged to flow through said cell and comprising a fluid normally in liquid state at ordinary ambient environmental conditions and being normally translucent;
• c. a solar energy absorbing medium in substantially uniformly dispersed admixture with said fluid energy transfer medium and present in sufficient quantities so as to render said energy transfer medium as retained within said cell and between said solar viewing wall and said backing plate substantially opaque to incoming incident solar energy;
• d. a dispersant in said fluid energy transfer medium for maintaining said solar energy absorbing medium in substantially uniform dispersion within said fluid energy transfer medium;
• e. pumping means for forcibly transferring said fluid energy transfer medium through said system;
• f. a heat extraction vessel for receiving fluid energy transfer medium from said cell means in liquid state and having at least one heat exchange surface for extracting thermal energy from said fluid energy transfer medium;
• and
• g. said pumping means including means for recirculating spent fluid energy transfer medium from said heat extraction vessel to the inlet of said cell means.