Heat Exchangers
Heat exchangers are devices that transfer heat between two or more fluids (liquids, gases) without them mixing, used widely in HVAC, power generation, and refrigeration for heating, cooling, and energy recovery, working by passing fluids through separate channels (like tubes or plates) to allow thermal energy to move from hotter to colder mediums, often increasing efficiency by recovering waste heat. Common types include shell-and-tube, plate, and air-cooled exchangers, each designed for specific applications like engine radiators or industrial processes.