LMTD (Log Mean Temperature Difference)

Log Mean Temperature Difference (LMTD) is a mathematical way to measure the temperature difference in heat exchangers, which transfer heat between two fluids. Unlike simply averaging the inlet and outlet temperatures, LMTD accounts for the varying temperatures along the heat exchanger to give a more accurate measure of heat transfer effectiveness. It's especially useful in engineering to design systems like air conditioners and boilers, ensuring they operate efficiently by optimizing heat exchange based on the changing temperatures of the fluids involved.