Refrigeration – Processes – Fluid external of refrigeration producing cycle
Patent
1986-04-14
1988-01-05
Wayner, William E.
Refrigeration
Processes
Fluid external of refrigeration producing cycle
62184, F25B 3904
Patent
active
047167408
ABSTRACT:
Controller apparatus and method for single or multiple heat exchange systems of the type including a working fluid circuit connected to each heat exchanger and with a working fluid in the circuit. In a multiple heat exchange system configuration, a manifold couples together all of the working fluid outputs or inputs from all of the heat exchangers for all of the systems, with an averaging relay for receiving inputs representative of the refrigerant head pressure for the condenser of each heat exchange system and for providing an output from the averaging relay representative of an average of the pressures for all of the systems. A control circuit, such as a pneumatic, electrical or electronic circuit, controls the rate of flow and/or the rate of heat exchange for the working fluid into or out of the manifold responsive to the output of the averaging relay in order to control all of the heat exchange systems dependent upon the average energy demand, to thereby reduce the overall energy requirements for all of the heat exchange systems. In a single heat exchange system configuration, the output rate of and/or the heat exchange characteristics of one heat exchanger (i.e., a cooling tower) is controlled by the refrigerant pressure characteristics.
REFERENCES:
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patent: 4085594 (1978-04-01), Mayer
patent: 4210957 (1980-07-01), Spethmann
patent: 4483152 (1984-11-01), Bitondo
patent: 4533080 (1985-08-01), Clark et al.
patent: 4554964 (1985-11-01), Awano et al.
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