System and method for capacity control in a multiple...

Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system

Reexamination Certificate

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Details

C062S185000, C062S228400, C062S510000, C417S002000, C417S007000, C417S044100

Reexamination Certificate

active

10822492

ABSTRACT:
A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid temperature setpoint. In response to an increase in the load in the chiller system, the algorithm determines if a compressor should be started and adjusts the operating speed of all operating compressors when an additional compressor is started. In response to a decrease in the load in the chiller system with multiple compressors operating, the algorithm determines if a compressor should be de-energized and adjusts the operating speed of all remaining operating compressors when a compressor is de-energized.

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