Patent ID: 8024938
Filing Date: 2011-09-27
Classification: F25B

Abstract:
1. A method of testing a refrigeration system comprising the steps of: operating a compressor of the circuit to be tested under full load in cooling mode for the refrigeration circuit to be tested; allowing the compressor for the circuit to be tested to reach at least a quasi-steady operating condition; measuring the refrigeration cycle parameters; where the refrigeration cycle parameters include at least the entering air dry-bulb temperature, suction line temperature, suction line pressure, and the return air wet-bulb temperature; where at least one of the liquid line pressure or the discharge line pressure is measured; using one measured parameter to determine a condenser saturation temperature; calculating at least one performance parameter; determining at least one corresponding target parameter and range from those parameters and ranges specified by said refrigeration system's manufacturer; comparing at least one performance parameter to the corresponding target parameter and range; determining whether the performance parameter falls outside the target parameter and range; where if the performance parameter falls outside the target parameter and range then the refrigeration system is eligible for correction; where the condenser saturation temperature is determined from the liquid line pressure; where the performance parameter is condensing temperature over ambient; where condensing temperature over ambient is calculated from the condenser saturation temperature and the entering air dry-bulb temperature; where the condensing temperature over ambient is compared to the corresponding target parameter; and where the condensing temperature over ambient must be at least one of less than about +30° F. or less than about 10° F. over the manufacturer's recommended target parameter for a valid verification test.