Heat exchange – Side-by-side tubular structures or tube sections
Patent
1978-08-10
1979-07-17
Richter, Sheldon Jay
Heat exchange
Side-by-side tubular structures or tube sections
34 86, 34 90, 165179, 165184, F28F 142
Patent
active
041612140
ABSTRACT:
A laundry dryer source of heat for providing warm gas to dry laundry is utilized to heat water for laundry washer use, and is particularly suited for coin operated laundries. Each dryer has a gas burner and a heat absorbtion water coil in the flame area of the burner, the coils being connected in a circuit between a cool water outlet and a heated water inlet of a typical automatic water heater tank, with pump means for circulating cool water from the tank through coils and returning heated water from the coils to the tank whenever any of the dryers are in operation. In one embodiment continuous water flow through the coils is provided during heating operation by substantially equal pressure differentials between the cold water inlet and the hot water outlet of each of the coils, and is further assured by provision of coils having substantially straight, horizontal runs, alternate runs being generally coplanar with the planes spaced apart. Preferably the coil has a continuous spiral groove along its inner face and a companion fin along its outer face.
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patent: 3771238 (1973-11-01), Vaughn
Lowe James L.
Mouzavires William E.
Richter Sheldon Jay
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