A Heat Exchanger is a device that transfers heat between two or more fluids without mixing them. It is widely used in industries to heat or cool liquids, gases, or steam efficiently. Common types include shell-and-tube, plate, air-cooled, and finned heat exchangers. https://www.heatexchanger.co.in/Heat-Exchanger-Blog-Details/role-of-heat-exchangers-in-industries/