Optimization And Design Modification Of Shell And Tube Heat Exchanger For An Economizer:

Abstract

This Thesis Considers Detail Study Of Existing Shell And Tube Heat Exchanger Of An Economizer For Awash Melkasa Aluminum Sulfate And Sulfuric Acid Share Company (Amassa S.Co) And Made Design Modification As Well As Optimization Of This Heat Exchanger By Using Univariate Optimization Technique On Microsoft Excel And Using Ant Colony Optimization Technique (Aco) In Matlab. Here Multi-Objective Optimization Of The Heat Transfer Rate And Cost Of A Shell And Tube Heat Exchanger Is Presented With Multiple Pareto-Optimal Solutions To Capture The Trade-Off Between The Two Objectives In Both Techniques. Five Decision Variables Were Considered: Tube Layout, Tube Diameter, Fin Height, Fin Space, And Fin Thickness. For These Decision Variables Sensitivity Analysis Has Been Performed In Order To Observe The Variational Influences Of Decision Variables Over Optimization Objectives And Then Focus On More Sensitive Decision Variables In A Case Of Univariate Technique To Decrease Problem Complexities. In This Study It Is Found That Tube Layout, Fin Height And Fin Space Have More Variational Effect On Objective Variables. Pareto Front Graphs Are Constructed For Multi Objective Optimization And The Best Solution Is Selected By Comparing The Two Techniques Values Based On Requirements. Finally, From Aco Optimal Values, A Point At Heat Transfer Rate And Total Cost Of 7.7481?? 105???? And 1.1463?? 106$ Respectively Is Selected As The Best Optimum Shell And Tube Heat Exchanger.