This project is the improvement of the concentric tube and shell and tube heat exchangers which have been changed the temperature indicators from analog to digital. All digital temperature indicators with type K thermocouple were used to measure the hot water temperatures and the cold water temperatures.
From the results and calculations are found many factors effected to the heat transfer rate. For instance the heat transfer rate is increased by flow rate and heat transfer rate of counter flow heat exchanger have better than parallel flow. Higher different between hot and cold water and higher heat transfer rate. Especially the shell and tube heat exchanger, heat transfer rate is increased with the numerous tub
