n Refrigeration
When recovering heat from a refrigeration system, you could allow the refrigerant to condense, or you can remove only a portion of the energy and desuperheat it. By Greg Scrivener
A desuperheating heat exchanger that controls the glycol portion of the heat exchanger to ensure that refrigerant is not condensed. The red arrow indicates the temperature probe used to measure the outlet temperature. The float can be seen on the bottom of the picture. We’ve focused a lot lately on heat pumps where the purpose of the refrigeration system is heating. However, sometimes we want to recover only a small amount of heat. For instance, when heating a small space or preheating some make-up air or water, we don’t want to make things complex. When recovering heat from a refrigeration
32
Plumbing & HVAC – July/August 2022
system, you fundamentally have two choices — you can allow the refrigerant to condense, and the heat recovery heat exchanger becomes a condenser, or you can remove only a portion of the energy from the refrigerant and desuperheat it. The choice between these two types of heat recovery systems is determined based on how
www.plumbingandhvac.ca
