To determine heat transfer rate, heat transfer coefficient, LMTD. The unit consist a two design ,mild steel shell houses the copper pipes. End box for shell which carriers a baffle at the center to make the heat exchanger of two pass type. cold fluid passes out side the tubes in the shell. Hot water flows inside the tubes. Temp. of hot water & cold fluid measured by thermometer.flow rates and temp. of hot and cold fluid can measured.