n Refrigeration
Refrigeration systems and heat pumps are similar in theory; the difference is based on which portion of the heat transfer is of interest to the expert. By Greg Scrivener
In heat pump systems, energy is rejected to a hot reservoir at the desire temperature while using as little energy as possible.
As promised in the previous issue, the discussion on heat pumping continues. Since we want to have a more in-depth look at several of the more challenging aspects of heat pumps in commercial and industrial settings in future issues, we are going to take a quick step back and go through a few of the fundamentals. Most of us were probably taught the second law of thermodynamics in several of its forms at some point in our lives. Maybe this lesson was done in school or maybe it was an outcome of some life experience. I remember vividly one particular instance of putting my thumb into a car lighter as a young boy (it had such cool-looking red circles; how could I resist?). As soon as my thumb touched that glowing red heating element, the energy from the hot element moved into my thumb Continued on page “45”
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March 2022 – Plumbing & HVAC
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