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This study examines the energy consumption of automatic icemakers installed in domestic refrigerators. This study builds upon the findings of a previous study and examines two additional refrigerator-freezers of different configurations. Both of the units used in the present study, one French door unit and one single door unit, have a bottom-mounted freezer with an icemaker installed in the freezer compartment. The icemaker in the single door unit does not employ electric resistance heaters to free frozen ice from the icemaker, instead it uses a twist tray which consumes very little power. The energy consumption of icemaker is difficult to measure because it operates on a periodic cycle which is independent of the compressor cycle used to maintain the cold temperatures in the domestic refrigerator; therefore methods proposed prior to this study have been subject to significant truncation error due to parameters characterized over incomplete icemaker or compressor cycles. The purpose of this study is to define a method of measuring the energy consumption of automatic icemakers that will generate a repeatable and reproducible result. Several sets of test data were analyzed and used to decipher the energy consumption of automatic icemakers. Through this effort, we developed a method of test to characterize icemaker energy consumption which circumvents the inherent problem with its measurement, truncation error due to incomplete cycling. The truncation error is avoided by measuring specific parameters with different sections of data from the same data set. This method was found to rapidly approach steady state values for the icemaker energy consumption. We then analyzed data sets from a prior study and found similar results for

Development of a Method to Measure the Energy Consumption of Automatic Icemakers in Domestic Refrigerators with Single Speed Compressors