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Hot gas defrost - the next step in commercial kitchen refrigeration

Monday, December 11, 2017

Energy use has never been such a hot topic for commercial refrigeration as it is now. Kitchen refrigerators and freezer units drive a significant proportion of energy bills across the food service industry. Authorities and customers alike are focusing on efficiency standards and ratings to understand not just what a unit costs to buy, but what it costs to operate. For the refrigeration design engineer, that's a challenge. Because many efficiency improvements have already been made, they need to look again at the fundamentals, and consider new approaches.

At Danfoss, we believe it's time for commercial kitchen refrigeration manufacturers to adopt hot gas defrost techniques that are already saving so much energy in cold rooms and ice machines. The technology is proven, it's familiar, and many of today's professional refrigeration units already use the multifunction refrigeration controllers needed to make it work.

That means hot gas defrost is actually simpler and more cost effective than many of the alternatives currently being tested at some manufacturers. And with around 8 – 10% energy savings, the benefits are significant. In this article, we'll recap how hot gas defrost works and why it's so efficient – and suggest some approaches to implement it in a straightforward, low-maintenance way.

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