Closed system solar heater

Details Closed system solar heater Closed system solar heater

1976-03-10

1977-03-08

Sprague, Kenneth W.

Stoves and furnaces

Heaters

Surface

165107, 237 1A, F24J 302

Patent

active

040107345

ABSTRACT:
A solar heating system of the closed type comprises a solar collector, a water storage tank, and water lines therebetween. The solar collector preferably comprises a continuous length of tubing coiled in a helical array of closely adjacent turns, having a water inlet communicating with the outermost turn and a water outlet communicating with the innermost turn. Comparatively cold water is taken from a water outlet adjacent the bottom of the storage tank and is pumped through a line to the water inlet of the solar collector, and heated water is supplied from the solar collector water outlet, together with cold water from an external supply, to a common inlet adjacent the top of the storage tank. The water line between the solar collector water outlet and the tank water inlet includes a U-shaped section disposed external of the tank and having legs at least equal to the height of the tank, to provide a heat trap which minimizes the loss of heat from the tank.

REFERENCES:
patent: 2838043 (1958-06-01), Bliss, Jr.
patent: 3236294 (1966-02-01), Thomason
patent: 3799145 (1974-03-01), Butterfield

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