Heat Transfer and Global Energy Balance in a Plate Heat Exchanger

Abstract

Heat transfer evaluation in a plate heat exchanger (PHE) is one of the most common issue which is widely used in many engineering processes. The objective of this paper determine to formulate a global energy balance in a PHE and to study the heat losses, firstly focuses to study the heat transfer in countercurrent and parallel flow and to measure the temperature profile and to determine the number of transfer units (NTU) effectiveness of a plate heat exchanger. An addition to calculate the overall heat transfer coefficient using criteria equations, also focused to draw the temperature profile of the heat exchanger for both configurations countercurrent and parallel flow with temperature on the axial axis and thermocouple position on the horizontal axis. Furthermore discussed the behaior of temperature across the heat exchanger, compare the countercurrent and parallel flow arrangements, cpaing the experimental heat exchanger effectiveness with that estimated by the NTU method, the NTU effectiveness method application in the calculation of the output temperatures of a PHE. This concentric plate heat exchanger allows the study of heat transfer between hot water flowing through an internal sheets and cold water flowing in the ring area lying between the internal and external sheets, the plate heat exchanger allows measuring hot and cold water temperatures in different points of the heat exchanger.