Stoves and furnaces – Heaters – Surface
Patent
1975-06-16
1976-10-26
Sprague, Kenneth W.
Stoves and furnaces
Heaters
Surface
F24J 302
Patent
active
039877825
ABSTRACT:
Discloses a closed-system, solar heat holder for thin-film heating of heat-transfer fluid in a tank. Solar energy, passing through an insulated glass cover, is trapped between the glass cover and an absorbing surface to heat the absorbing surface and thereby a thin film of heat-transfer fluid passing between the thin-film spacing provided by the absorbing surface and a parallel-disposed, insulated baffle with a bimetallic thermostat valve controlling the passage therethrough of such heat-transfer fluid which, when heated, in turn gives up heat to fluid flowing through a heat exchanger thereby cooling such heated heat-transfer fluid. Another insulated baffle is disposed parallel to the first baffle and the cooled heat-transfer fluid moves downwardly between the baffles to the bottom of the tank. A pneumatic container in the tank contracts to relieve the tank of pressure resulting from the heating and expansion of the heat-transfer fluid. Mirrors disposed between the glass cover and absorbing surface reflect solar energy onto the absorbing surface during variations of solar energy incidence when the sun's rays are not perpendicular to the glass cover.
REFERENCES:
patent: 1158175 (1915-10-01), Cherrier
patent: 2122821 (1938-07-01), Mohr
patent: 2358476 (1944-09-01), Routh et al.
patent: 2553073 (1951-05-01), Barnett
patent: 2553302 (1951-05-01), Cornwell
patent: 3834355 (1974-09-01), Arant
Sprague Kenneth W.
Yeung James C.
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