Heat from a variety of sources can be turned into a valuable asset if practical. A good example is a facility with a large refrigeration system that also is using hot water or needs heat for other purposes such as environmental heating. Since the refrigeration expels heat to the outside in order to accomplish the refrigeration cycle, this heat can be diverted or used for another purpose and still maintain the cycle efficiently.
Other heat recovery systems may involve hot gas exhaust from a steam boiler. Typically, approximately 20% of the heat energy is expelled up the exhaust stack as waste. This exhaust temperature is by average 325 degrees. Heat can be recovered from this exhaust and diverted either back into the feed stock for replacement water, another hot fluid process or pre-warming the input gas back into the burner itself.
Exhaust systems with MUA can have a ERV (energy recovery ventilation) that passes the outgoing air with the incomming air through a heat exchanger to capture around 60% of the outgoing energy and transfer it to the incomming air stream. This can cut MUA heating costs by the same amount as the efficiency of the system.
Target inductries are heat treating, food proccessing, powder finishing, foundries and MUA for a variety of exhaust processes.