Adjustable surge and capacity control system

Details Adjustable surge and capacity control system Adjustable surge and capacity control system

F - Mech Eng,Light,Heat,Weapons

25

B

341/38

F25B 49/00 (2006.01) F04D 27/02 (2006.01)

Patent

CA 1139400

078241-Y ADJUSTABLE SURGE AND CAPACITY CONTROL SYSTEM Abstract: An adjustable surge and capacity control system for matching a capacity control system to an inverter- driven centrifugal compressor based liquid chiller having unknown surge characteristics. The necessary adaptation of the capacity control circuit to a particular chiller is attained by the provision of two potentiometers (104,120) which are adjustable to develop a functional which avoids surge and operates the system in an efficient manner at all feasible operating point loads and heads. The use of a circuit employing a pair of potentiometers permits the formation of the appropriate functional with two degrees of shaping flexibility.

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