The Effect of Nanoparticles on Thermal Efficiency of Double Tube Heat Exchangers in Turbulent FlowReportar como inadecuado




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ISRN Mechanical Engineering - Volume 2014 2014, Article ID 274560, 5 pages -

Research Article

Department of Chemistry, Islamic Azad University, Arak Branch, Arak 38361-1-9131, Iran

Department of Chemistry, Islamic Azad University, Saveh Branch, Saveh 39197-15179, Iran

Department of Chemical Engineering, Faculty of Sciences, University of Arak, Arak 38156-8-8349, Iran

Received 7 February 2014; Accepted 11 March 2014; Published 27 March 2014

Academic Editors: M. Al-Nimr and M. Yürüsoy

Copyright © 2014 Reza Aghayari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper refers to the Overall Heat Transfer Coefficient of Nano Fluids OHTCNF in heat exchangers and the relevant effective parameters. An improvement in Heat Transfer HT and OHTCNF containing nanoaluminum oxide with ca. 20 nm particle size and particular volume fraction in the range of 0.001-0.002 has been reported. The effects of temperature and concentration of nanoparticles on HT variation as well as Overall Heat Transfer Coefficient OHTC in a countercurrent double tube heat exchanger with turbulent flow have been studied. The experimental results show a remarkable 8%–10% rise in the mean HT and the OHTC. Accordingly, with an increase in the processing temperature and-or particle concentration the OHTC was observed to increase.





Autor: Reza Aghayari, Heydar Madah, Bahram Keyvani, Abdolreza Moghadassi, and Fatemeh Ashori

Fuente: https://www.hindawi.com/



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