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I have read several discussions about this. The answer I see most often is that "Air to air is is not used in refrigeration" for the reasons listed above. The temperature differential in winter is often taken advantage of in a gas or liquid cycle. Heat recovery is a common approach to utilizing winter temperature differentials to maximize efficiency. For example the walk in cooler is allowed to run all winter and the refrigeration loop is used as a heater.
Most applications for "Economizer" are geared towards HVAC but the principles are used in refrigeration too.
https://www.techtarget.com/searchdat...0conditioners.
Last edited by Maurice Mcmurry; 05-14-2024 at 9:17 AM.
Reason: economizer link
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