A heat exchanger is a device that transfers heat between two or more fluids. It is commonly used in various industrial processes and HVAC systems to efficiently transfer heat energy from one fluid to another.
The basic principle of a heat exchanger involves the transfer of heat through a solid wall that separates the two fluids. The fluids can be in direct contact with each other, or they can be separated by a metal wall or a tube bundle.
There are different types of heat exchangers, including shell and tube, plate, and finned tube heat exchangers. Each type has its own design and construction, depending on the specific application and requirements.