Performance of a Stand-Alone Wind-Electric Ice Maker for Remote Villages

Two ice makers in the 1.1 metric tons/24-hour (1.2 tons/day) size range were tested to determine their performance when directly coupled to a variable-frequency wind turbine generator. Initial tests were conducted using a dynamometer to simulate the wind to evaluate whether previously determined potential problems were significant and to define basic; performance parameters. Field testing inNorman, Oklahoma, was completed to determine the performance of one of the ice makers under real wind conditions. As expected, the ice makers produced more ice at a higher speed than rated, and less ice at a lower speed. Due to the large start-up torque requirement of reciprocating compressors, the ice making system experienced a large start-up current and corresponding voltage drop whichrequired a larger wind turbine than expected to provide the necessary current and voltage. Performance curves for ice production and power consumption are presented. A spreadsheet model was constructed; to predict ice production at a user-defined site given the wind conditions for that location.; Future work should include long-term performance test and research on reducing the large; start-upcurrents the system experiences when first coming on line.