Monitoring compressor performance in a refrigeration system
First Claim
Patent Images
1. A method comprising:
- calculating an isentropic efficiency of a compressor of a refrigeration system;
averaging said isentropic efficiency over a predetermined period;
comparing said average to an efficiency threshold, said efficiency threshold being based on a predetermined percentage of a benchmark isentropic efficiency that is based on at least one of an ideal suction enthalpy, an ideal intake enthalpy, and an ideal discharge enthalpy; and
detecting a compressor malfunction based on said comparison.
8 Assignments
0 Petitions
Accused Products
Abstract
A method for monitoring compressor performance in a refrigeration system includes calculating an isentropic efficiency of a compressor of the refrigeration system, averaging isentropic efficiency over a predetermined period, comparing the average to an efficiency threshold, and detecting a compressor malfunction based on the comparison. The method may be executed by a controller or stored in a computer-readable medium.
-
Citations
42 Claims
-
1. A method comprising:
-
calculating an isentropic efficiency of a compressor of a refrigeration system; averaging said isentropic efficiency over a predetermined period; comparing said average to an efficiency threshold, said efficiency threshold being based on a predetermined percentage of a benchmark isentropic efficiency that is based on at least one of an ideal suction enthalpy, an ideal intake enthalpy, and an ideal discharge enthalpy; and detecting a compressor malfunction based on said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method comprising:
-
receiving a suction pressure signal that corresponds to a suction pressure of a compressor of a refrigeration system; receiving a discharge pressure signal that corresponds to a discharge pressure of said compressor; receiving a suction temperature signal that corresponds to a suction temperature of said compressor; receiving a discharge temperature signal that corresponds to a discharge temperature of said compressor; calculating a suction entropy and a suction enthalpy of said compressor based on said suction pressure signal and said suction temperature signal; calculating a discharge enthalpy based on said discharge temperature signal and said discharge pressure signal; calculating an intake enthalpy based on said suction entropy; calculating an isentropic efficiency of said compressor based on said intake enthalpy, said discharge enthalpy, and said suction enthalpy; averaging said isentropic efficiency over a predetermined period; comparing said average to an efficiency threshold; and
detecting a compressor malfunction based on said comparison. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A method comprising:
-
calculating an isentropic efficiency of a compressor of a refrigeration system; averaging said isentropic efficiency over a predetermined period; comparing said average to an efficiency threshold; detecting a compressor malfunction based on said comparison; and comparing said isentropic efficiency with a predetermined efficiency maximum and a predetermined efficiency minimum and generating said notification when said isentropic efficiency is one of greater than said predetermined efficiency maximum and less than said predetermined efficiency minimum. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
Specification