Title: Exergy analysis of laminar fluid flow in stainless steel microtubes

Authors: Nezaket Parlak; Mesut Gur; Tahsin Engin; Hasan Kucuk

Addresses: Faculty of Engineering, Department of Mechanical Engineering, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey. ' Faculty of Mechanical Engineering, Department of Mechanical Engineering, Istanbul Technical University, Gumussuyu 34437 Istanbul, Turkey. ' Faculty of Engineering, Department of Mechanical Engineering, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey. ' Faculty of Engineering, Department of Mechanical Engineering, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey

Abstract: In the study, exergy analysis of steady laminar fluid flow in stainless steel microtubes with diameters between 103 ?m and 179 µm were conducted in the adiabatic conditions experimentally. The exergy losses were obtained for deionised water flowing in rough microtubes with the surface relative roughness of 2–6%. Results indicated that the exergy loss was in a good agreement with the conventional theory and the increasing in relative roughness leads to increasing exergy loss. As Re increases, measured exergy losses were found to be significantly higher than that of the predicted values.

Keywords: exergy analysis; laminar flow; fluid flow; stainless steel microtubes; second law analysis; exergy loss; deionised water; surface roughness.

DOI: 10.1504/IJEX.2011.043918

International Journal of Exergy, 2011 Vol.9 No.4, pp.472 - 485

Received: 18 Nov 2010
Accepted: 29 May 2011
Published online: 01 Dec 2011 *

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