IJERT-EMS
IJERT-EMS

Experimental Investigation on Transient State Performance of Natural Circulation Loop


Experimental Investigation on Transient State Performance of Natural Circulation Loop
Authors : G. Narendar, AVSS Kumara Swami Gupta, A. Krishnaiah
Publication Date: 30-05-2016

Authors

Author(s):  G. Narendar, AVSS Kumara Swami Gupta, A. Krishnaiah

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 5 - Issue. 06 , June - 2016

e-ISSN:   2278-0181

 DOI:  http://dx.doi.org/10.17577/IJERTV5IS060090

Abstract

Natural circulation loop is a passive system, without the aid of power operating devices, the working fluid circulates due to temperature difference existing within the loop. A vertically placed pipe loop equipped with two heat exchangers placed at its lower end and upper end of the loop for heating and cooling of the loop fluid forms the natural circulation loop. The bottom heat exchanger acts as ‘heat source’ and the top one acts as ‘heat sink’. The heat is transferred from source to sink through the circulation of loop fluid. The fluid circulates in the loop due to density difference caused by the temperature variation between heat source and heat sink, there by transporting loop fluid from the source to the sink without the aid of any external mechanical device like pump. For transient state experiments, the performance of natural circulation loop with different concentrations of nanofluids with continuous increase in temperature of heat source from 50 °C to 90 °C are investigated. During transient state operation the average fluid flow rate is more for CuO nanofluid than Alumina nanofluid.

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