Numerical study of heat transfer and exergy analysis of a heat exchanger with single and double segmental baffles

Considering the significant role of heat exchangers in industrial applications, the study of their behavior and how the various parameters influence on their performance has been considered extremely. In this paper, heat transfer and exergy analysis of a threedimensional baffled shell and tube heat exchanger is investigated numerically. The number of baffles and also the change of the baffle to the segmental ones are considered as the physical variable of the problem. The ?-? SST turbulence model is used to simulate the turbulent flow. The two hot and cold fluids are oil and water, respectively. Heat transfer, pressure drop and exergy analysis are analyzed for different conditions. The results show that heat transfer rate and exergy loss increase by increasing the oil flow rate. By changing the number of baffles from 3 to 5, the amount of heat transfer and the loss of exergy enhance. © 2018 Lavoisier.