In many industrial processes there is waste of energy or a heat stream that is being exhausted, heat exchangers can be used to recover this heat and put it to use by heating a different stream in the process.
U mnogim industrijskim procesima postoji rasipanje energije ili struja fluida pa se izmjenjivači topline mogu koristiti za ponovno dobivanje te topline i njeno korištenje za grijanje neke druge struje u procesu.