An exchanger is someone or something that exchanges one thing for another. It could be a person who swaps items with someone else, or a device that converts one form of energy, currency, or goods into another. Full definition
During cooling, fresh water is heated to 40 °C, which is then fed to the EasiHeat system where the system's internal plate heat exchanger heats it to 90 °C to supply the process. (foodprocessing-technology.com)
Q What is the requirement of heat exchangers in the Indian market when it comes to processed foods? (fmtmagazine.in)
Another possible emission source of CO2 is seawater heated in heat exchangers of big ships. (realclimate.org)