Study surface roughness on overall performance of parallel flow microchannel heat exchanger

  • Ahmed A. Ali Thi-Qar University, College of Engineering , Mechanical Engineering Department, Iraq
  • †, Mushtaq I. Hasan Thi-Qar University, College of Engineering, Mechanical Engineering Department, Iraq
  • Ghassan Adnan Thi-Qar University,College of Engineering, Mechanical Engineering Department, Iraq
Keywords: surface roughness, Microchannel heat exchanger, Laminar flow, Numerical investigation, Thermal performance

Abstract

The aim of this paper is  to investigate numerically the  surface roughness effects on the overall performance of parallel flow microchannel heat exchanger (PFMCHE) with different  hydraulic diameters. Water  has been used  as working fluid flow velocities in one direction for hot and cold channels with  square shape. Surface roughness considered in this study has been  choiced as ratio with equal 0.14 of surface roughness to hydraulic diameter. The obtained results showed that, the pumping power increased with increasing effect of surface roughness and decreasing hydraulic diameter, also the thermal performance increased slightly with increasing surface roughness
Published
2019-06-16
Section
Articles