The ESM™ was installed to optimize the energy consumption of two Bitzer chillers each with two compressors and operating on 18.75 kW input, as well as on one holding freezer in the bakery.
Over a six month period in 2011, the ESM™ units and the refrigeration system were monitored in order to gather compressor energy usage data. Energy data loggers were installed to monitor the energy consumption of the compressors both with and without the ESM™ units in operation.
These loggers took data samples every 8 seconds with an accumulated record every 6 minutes. During the analysis, the data is accumulated and averaged over one hour periods to provide comparative data. The temperature performance of the units during the evaluation was also monitored.