Gas-gas Heat Exchanger:
An gas-gas heat exchanger facilitates the transfer of thermal energy through the exchange of heat between two or more air streams. One air stream serves as the heat source (hot air stream), while the other acts as the heat carrier (cold air stream). The heat from the hot air stream is transferred to the cold air stream via conduction, convection, and radiation, causing the cold air stream to heat up, while the hot air stream cools down. This process enables the transfer of heat from the hot air stream to the cold air stream, achieving the transfer of thermal energy and efficient energy utilization.