WordReference Random House Unabridged Dictionary of American English © 2020
heat exchang′er, 
  • Thermodynamicsa device for transferring the heat of one substance to another, as from the exhaust gases to the incoming air in a regenerative furnace.
    • 1900–05

    Collins Concise English Dictionary © HarperCollins Publishers::
    heat exchanger n
    1. a device for transferring heat from one fluid to another without allowing them to mix
    'heat exchanger' also found in these entries:
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