A heat exchanger is a device that transfers heat between two or more fluids or gases without mixing them. It improves energy efficiency, maintains process temperatures, and is widely used in industries like power plants, chemical and petrochemical processing, HVAC systems, and marine applications for reliable heating and cooling. https://www.heatexchanger.co.in/Heat-Exchanger-Blog-Details/role-of-heat-exchangers-in-industries/