Hydrocarbons21.com: Freezer with Variable-Speed R290 Compressor Found to Use 41% Less Energy than Fixed-Speed Unit

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In a study conducted by Brazilian manufacturer Embraco (a brand of Nidec Global Appliance) and Italian OEM EPTA Refrigeration, a vertical ice cream freezer using a prototype variable-speed propane (R290) compressor was found to use 41% less energy than a reference cabinet using a fixed-speed (on/off) R290 compressor. 

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