Refrigeration – Automatic control – Refrigeration producer
Patent
1994-11-28
1996-07-23
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
62217, 622284, F25D 1702
Patent
active
055378307
ABSTRACT:
A method of controlling the operation of a centrifugal compressor in a water chiller system. The compressor's capacity is variable by modulating its speed of rotation or by modulating its inlet guide vane's position. The water chiller includes an evaporator having a leaving water temperature. The method comprises the steps of: monitoring the leaving water temperature; determining if the leaving water temperature is in a steady state; modulating the compressor capacity by modulating speed of rotation if the leaving water temperature is in a steady state; and modulating the compressor capacity by modulating inlet guide vane position if the leaving water temperature is not in a steady state.
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Goshaw Craig M.
Rentmeester Paul C.
Sullivan Brian T.
American Standard Inc.
Beres William J.
Ferguson Peter D.
O'Driscoll William
Tanner Harry B.
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