EXPERIMENTAL INVESTIGATION AND PERFORMANCE OPTIMIZATION OF A CROSS FLOW HEAT EXCHANGER BY ENTROPY GENERATION MINIMIZATION APPROACH

Year 2019, Volume: 5 Issue: 2 - Issue Name: Special Issue 9: International Conference on Mechanical Engineering 2017, Istanbul, Turkey, 1 - 12, 29.01.2019

S. K. Rout

https://doi.org/10.18186/thermal.519128

Cited By: 5

Abstract

The exergy loss and performance optimization of
a cross flow heat exchanger (CFHE) with air and hot water as working fluid have
been experimentally investigated. Experiments are performed on various mass
flow rates of hot water and air over a ranges of 0.015 kg.s^-1– 0.04
kg.s^-1 and 0.117 kg.s^-1 - 0.763 kg.s^-1
respectively. To validate the results of the present study, they are compared
with available data in literature through which a reasonably a good agreement
is obtained between them. This study demonstrates the successful application of
Taguchi approach for optimal design of the (CFHE). The effects of design
parameters and two different operating conditions such as the fin pitch, the
inside tube diameter and the mass flow rate of water and air on exergy loss are
investigated. In the Taguchi experimental design method, exergy loss is considered
as performance parameter and it is revealed that parameter combinations such as

_h=0.0163 kg.s^-1,

_a=0.1175 kg.s^-1, d_i=0.0199 m and F_p=0.00259
m resulted optimum performance. Contribution ratios of each parameter on exergy
loss are assessed. Mass flow rate of air is determined to be the most effective
parameter on exergy loss with a contribution ratio of 51.26 % followed by mass
flow rate of hot water, fin pitch, and diameter contribution ratios of  35.91 %, 7.02 % , 5.79 % respectively.

Keywords

Experimental Investigation, Cross Flow Heat Exchanger, Performance Optimization, Exergy Analysis, Taguchi Method

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