Solar heat collector with convection suppressor

Details Solar heat collector with convection suppressor Solar heat collector with convection suppressor

1977-02-23

1979-04-17

Sprague, Kenneth W.

Stoves and furnaces

Heaters

Surface

126270, F24J 302

Patent

active

041495225

ABSTRACT:
A solar heat collector having reduced convention losses until a predetermined absorber means excess temperature is reached and including a radiant energy absorbing means which has a first and a second surface. Means for the passage of a fluid to be heated is positioned in contact with the second surface of the absorbing means. Means for reducing conduction losses are positioned adjacent to the means for passage thereby sandwiching the means for passage between the absorbing means and the means for reducing. Glazing means which is transparent to radiant energy is positioned over the first surface of the absorbing means and is spaced apart therefrom thereby trapping air between the glazing means and the absorbing means. Means to suppress convection flow of the trapped air until a predetermined absorbing means temperature is reached. The means to suppress convection is located between the glazing means and the absorbing means thereby reducing losses due to convection from the absorbing means. The means to suppress convection losses provides for very high operating efficiencies at all operating temperatures up to a predetermined maximum, at which it ceases to function and the efficiency quickly reaches zero with any additional increase in collector operating temperature.

REFERENCES:
patent: 3946892 (1976-03-01), Rigal et al.
patent: 3980071 (1976-09-01), Barber, Jr.
patent: 4016861 (1977-04-01), Taylor
patent: 4076016 (1978-02-01), Phillips

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