A Mathematical Model for Thermo-Hydraulic Design  of Shell and Tube Heat Exchanger Using a  Step By Step Technique

Ghazi Mohammed, Ali; Hussain Tarrad, Ali

	A Mathematical Model for Thermo-Hydraulic Design of Shell and Tube Heat Exchanger Using a Step By Step Technique
Journal of Engineering and Sustainable Development
Article 1, Volume 10, Issue 4, 2006, Pages 12-35
Authors
Ali Ghazi Mohammed; Ali Hussain Tarrad
Abstract
In this work experimental and theoretical model predictions for thermal and hydraulic design of shell and tube heat exchanger are presented. The tests were carried out at hot fluid temperature range between (40) to (60) C° at atmospheric pressure for volumetric flow rates ranged between (800) to (1800) l/hr.The model presented for this object was suggested to be accomplished by using the step by step technique. In this model, the heat exchanger was divided into longitudinal increments along the heat exchanger for both tube and shell sides. The output of each increment for both sides of process and service fluids including the thermal and hydraulic parameters are considered to be the input of the next increment and so on until the final temperature and load of the heat exchanger together with the hydraulic requirements were reached.Two methods were applied in the suggested design model, Kern and Bell-Delaware, inaddition to the step by step technique. The prediction of heat exchanger performance of thepresent model well agreed with the above mentioned methods.The results of the present model showed a good agreement with the experimental data obtained during this investigation for the performance parameters considered in the model. The predicted values of the overall heat transfer coefficient showed a divergence ranged between (15%) and (17%) for service fluid flow rates of (850) and (1000) l/hr respectively

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