Title: Exergetic analysis of a long two-phase closed thermosyphon system

Authors: Behrooz M. Ziapour, Hadi Shaker

Addresses: Faculty of Engineering, Department of Mechanical Engineering, The University of Mohaghegh Ardabili, Ardabil, 179, Iran. ' Faculty of Engineering, Department of Mechanical Engineering, The University of Mohaghegh Ardabili, Ardabil, 179, Iran

Abstract: The focus of present study is to provide a simplified engineering model of the long thermosyphon. In this paper, combination of the thermal network analysis and the lumped capacity were used in order to simulate thermal characteristics of a long two-phase closed thermosyphon operation. Then the T-s diagram of the thermosyphon processes was presented based on the combination model analysing results. Finally, the exergy analysis of the thermosyphon components was performed for different refrigerants as the working fluids. The results show that increasing the ambient heat transfer coefficient causes to decrease of the condenser and total exergy destruction rates.

Keywords: exergy analysis; fill charge ratio; lumped capacity; heat transfer; thermal networks; long thermosyphon; engineering models; simulation; refrigerants; working fluids; condenser rate; exergy destruction rate.

DOI: 10.1504/IJEX.2010.035517

International Journal of Exergy, 2010 Vol.7 No.6, pp.714 - 730

Received: 06 Jun 2009
Accepted: 20 Apr 2010
Published online: 30 Sep 2010 *

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