Non-linear control algorithm in vapor compression systems

Details Non-linear control algorithm in vapor compression systems Non-linear control algorithm in vapor compression systems

2007-02-06

2007-02-06

Jiang, Chen Wen (Department: 3744)

Refrigeration

Automatic control

Of external fluid or means

C062S209000, C236S07800D, C700S042000

Reexamination Certificate

active

10793486

ABSTRACT:
A PID control for a vapor compression system utilized to heat water identifies a particular range of error signals and derivative of the error signals that could be indicative of the cycle moving in an inefficient direction. If this determination is made, then a substitute for the error signal is utilized. In particular, the determination is made if both the error and the derivative of the error are negative. The substitute multiplies the error with its derivative to result in a positive product. This ensures the system will not move in the inefficient direction.

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