Adjustable surge and capacity control system

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

1979-09-12

1981-06-30

Casaregola, Louis J.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Plural diverse condition responsive

62228, F01D 1700, F25B 100

Patent

active

042759870

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 which are adjustable to develop a function 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 function with two degrees of shaping flexibility.

REFERENCES:
patent: 3355906 (1967-12-01), Newton
patent: 3555844 (1971-01-01), Fleckenstein et al.
patent: 3695774 (1972-10-01), Martz et al.
patent: 3780532 (1973-12-01), Norbeck
patent: 4151725 (1979-05-01), Kountz et al.

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