A Heat Exchanger is a device that transfers heat between two or more fluids without mixing them. It is widely used in industries, power plants, HVAC systems, and chemical processes to efficiently heat or cool fluids. Common types include shell-and-tube, plate, air-cooled, double-pipe, and coil heat exchangers. https://www.heatexchanger.co.in/Heat-Exchanger-Blog-Details/role-of-heat-exchangers-in-industries/