| CPC F24F 11/49 (2018.01) [F24F 11/38 (2018.01)] | 40 Claims |
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1. A monitoring and early problem detection system for a heating, ventilating, and air conditioning and refrigeration (HVAC&R) system, comprising:
a hardware-based data acquisition processor operable to acquire observations about the HVAC&R system, the observations including fluid temperature measurements for a condenser and fluid temperature measurements for an evaporator, the observations further including compressor input power parameter measurements corresponding to the fluid temperature measurements;
a hardware-based compressor input power parameter processor operable to learn a relation between the fluid temperature measurements and the compressor input power parameter measurements, the compressor input power parameter processor configured to compute a predicted value for a compressor input power parameter using the relation; and
a hardware-based degradation detection processor operable to determine whether performance degradation has occurred in the HVAC&R system based on comparing the predicted value for the compressor input power parameter against an acquired compressor input power parameter measurement;
wherein the compressor input power parameter processor stores the compressor input power parameter measurements acquired by the data acquisition processor via a two-dimensional temperature map containing a plurality of cells, and wherein for each cell, the compressor input power parameter processor stores the compressor input power parameter measurements corresponding to that cell as summary statistics; and
wherein the compressor input power parameter processor indexes each cell in the two-dimensional temperature map using the fluid temperature measurement for the condenser and the fluid temperature measurement for the evaporator corresponding to that cell.
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