Calculate using the nameplate amperage and voltage and a power factor. Measure the input kW fan using a power meter reading true RMS power. Table 397: Evaporator Fan Controller Calculations Assumptions Term Unit Values Source , Energy savings due to evaporator being kWh Calculated Calculated shut off , Heat energy savings due to reduced kWh Calculated Calculated heat from evaporator fans , Control energy savings due to electronic kWh Calculated Calculated controls on compressor and evaporator , Power demand of evaporator fan kW Calculated Calculated calculated from any of the methods described above , Power demand of compressor motor kW Calculated Calculated and condenser fan calculated from any of the methods described above , Conversion from kW to ton 0.28 Conversion Factor 5%, Reduced run-time of compressor and 5% 7 None evaporator due to electronic controls , Conversion factor from kW to 0.746 Conversion Factor horsepower PF, Power Factor of the motor None Fan motor: 0.75 1, 5, 6 Compressor motor: 0.9 %Off, Percent of annual hours that the None 46% 2 evaporator is turned off , Efficiency of typical refrigeration system 1.6 3 , Equivalent annual full load hours of EDC Data Gathering EDC Data Gathering compressor operation 4,072 1, 4
Calculate using the nameplate amperage and voltage and a power factor. Measure the input kW fan using a power meter reading true RMS power. Table 397: Evaporator Fan Controller Calculations Assumptions Term Unit Values Source , Energy savings due to evaporator being shut off kWh Calculated Calculated , Heat energy savings due to reduced heat from evaporator fans kWh Calculated Calculated , Control energy savings due to electronic controls on compressor and evaporator kWh Calculated Calculated , Power demand of evaporator fan calculated from any of the methods described above kW Calculated Calculated , Power demand of compressor motor and condenser fan calculated from any of the methods described above kW Calculated Calculated , Conversion from kW to ton 0.28 Conversion Factor 5%, Reduced run-time of compressor and evaporator due to electronic controls None 5% 7 , Conversion factor from kW to horsepower 0.746 Conversion Factor PF, Power Factor of the motor None Fan motor: 0.75 Compressor motor: 0.9 1, 5, 6 %Off, Percent of annual hours that the evaporator is turned off None 46% 2 , Efficiency of typical refrigeration system 1.6 3 , Equivalent annual full load hours of compressor operation EDC Data Gathering EDC Data Gathering 4,072 1, 4
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