Heat Exchanger Theory

A heat exchanger is a device that transfers heat between two or more fluids without mixing them. This is done to either heat a colder fluid or cool a hotter one. For example, in a car radiator, hot engine coolant passes through tubes while air blows over them, cooling the fluid down. The efficiency of a heat exchanger depends on factors like surface area, flow rates, and temperature difference. These devices are widely used in heating, cooling, and industrial processes, helping save energy and improve system performance by optimizing temperature control.