Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1985-04-01
1987-01-20
Cline, William R.
Heat exchange
Movable heating or cooling surface
Rotary drum
165 26, 165 39, 165 40, F25B 2900, G05D 2300, B60H 100, B61D 2700
Patent
active
046374540
ABSTRACT:
A wide range temperature control system for controlling and maintaining the temperature of a first cooling liquid in an indirect heat exchanger at a predetermined setpoint within a wide range of temperatures is disclosed. The system proportions flow of a second cooling liquid between a cooling coil located in the heat exchanger and a bypass path. Flow through the bypass path is regulated by a temperature sensitive valve responsive to outflow temperature of the second cooling liquid from the heat exchanger. Bypassed flow mixes with the outflow from the heat exchanger and thereby establishes and maintains the temperature sensitive valve in a proportional flow mode. The flow of second cooling liquid through the cooling coil is proportioned to the differential in temperature between the second cooling liquid and the first cooling liquid and to the dynamic heat conditions within the heat exchanger at any time. The heat exchanger is thereby enabled to provide precise or "tight" temperature regulation over a wide range of setpoint temperatures.
REFERENCES:
patent: 2254917 (1941-09-01), Schroder
patent: 2432186 (1947-12-01), Whann
patent: 2433420 (1947-12-01), Booth
patent: 2788176 (1957-04-01), Andersen
patent: 2975308 (1961-03-01), Kilbourne
patent: 3512580 (1970-05-01), Kyroudis
patent: 3852147 (1974-12-01), Wilson
patent: 4095644 (1978-06-01), Huff
patent: 4367785 (1983-01-01), Allen
Product Specification Sheet, "Tempflow.TM.-FX Temperature Sensitive Flow Control Valve", Bay Voltex Corporation, 1982.
Cline William R.
Ford John K.
Harrison David B.
Mydax, Inc.
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