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AWWA ACE68851
- Field Tests of Commercial Ice Machines: Do They Perform as Reported in ARI?
- Conference Proceeding by American Water Works Association, 11/01/2008
- Publisher: AWWA
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This powerpoint presentation begins by presenting the objectives of the study including the following: to measure actual water and energy usage of eight machinesconsisting of two water-cooled and six air-cooled units;to compare the field-measured water and energy usage ratesto ARI and/or manufacturer supplied (laboratory) testingdata; todetermine for each machine the annual water, wastewater,and energy consumption and saving that could be achievedby retrofitting with models that are more water/energy efficient; and,capture field data that can be used to quantify the energysaving potential for reductions in regional water distribution(pumping) and wastewater treatment. This is followed by information on how ice machines work, and the Air-Conditioning and RefrigerationInstitute (ARI) Ice Machine Database. Study evaluation methods include the following:one-month of water and electrical energy usage data wascollected;water consumption was measured with a single-jetpaddlewheel turbine installed at the inlet line of each machineand used in tandem with an electronic data logger thatrecorded time-stamped pulses from each meter;an energy data logger was installed in the circuit breakerpanel feeding each machine to record power and energyconsumption; and,ice production was directly weighed for three consecutiveharvest cycles and then averaged. Presentation conclusions indicate the following: savings (water and energy) can beachieved with more efficient machines;potential for off-peak loading, the only appliance incommercial food service; and,ARI data is a good benchmark for specifying ice machinesair-cooled machines. Includes tables, figures.
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