Heat exchanger and drain down for solar collector

Details Heat exchanger and drain down for solar collector Heat exchanger and drain down for solar collector

1979-04-02

1981-03-24

Yeung, James C.

Heat exchange

Non-communicating coaxial enclosures

Helical conduit means

126420, 126435, 126437, 165163, F28D 712, F24J 302

Patent

active

042574790

ABSTRACT:
A solar collector has a liquid system independent of a household hot water heater system, the two systems transferring heat in a heat exchanger. The heat exchanger has an open top inner tank enclosed in a closed outer tank, a coil connected to the hot water tank system circulates under main pressure in a coil in the annular space between the inner and outer tanks. Liquid from the collector enters at the bottom of the annular space, flows upward around the coil and overflows the top of the inner tank. A pump draws liquid from the bottom of the inner tank for circulation through the solar collector system. The liquid in the collector system drains by gravity into the inner tank at any time that the collector circulating pump is not operating, thus providing freeze protection during all normal operations and also at such time that a power failure may occur.

REFERENCES:
patent: 1951403 (1934-03-01), Goddard
patent: 2324257 (1943-07-01), Ekert
patent: 2425669 (1947-08-01), Brock
patent: 3100523 (1963-08-01), Marrujo
patent: 3482625 (1969-12-01), Bray
patent: 4067314 (1978-01-01), Bollefer
patent: 4082143 (1978-04-01), Thomason
patent: 4083490 (1978-04-01), Cunningham et al.
patent: 4108160 (1978-08-01), Harper
patent: 4130110 (1978-12-01), Bottum
patent: 4138996 (1979-02-01), Cartland

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