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peter pirillo Basic Refrigerant Circuit Course September 29, 2022, 9:11 pm
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Why (and When) Do We Need Defrost?
Why Defrost? Let's start with the basics and move on from there. Defrost is necessary when the coil temperature drops below 32°F. Defrost can be as simple as turning the compressor off for a period of time or as elaborate as reversing the flow of refrigerant for the whole system or just parts of the […]Read more
What is the "Mid Point" of a Refrigerant Blend?
As we have mentioned in several previous articles (such as this one HERE), many blended refrigerants have glide, which simply means they boil and condense over a range of temperatures instead of just one temperature. As an example, consider refrigerant R407c. It is a zeotropic blend, which means it has enough glide to make a […]Read more
Design Temperature Difference for Chillers
I get emails from time to time with questions that stem from the articles or the podcast. This was a great question, but I was not the best person to answer it. I reached out to Jeff Neiman, our resident HVAC School chiller tech, and he answered it. Here is the question: Hello Bryan, Thanks […]Read more