Experimental Studies on the Thermal Performance of a Closed Loop Pulsating Heat Pipe Using Water-Ethanol Binary Working Fluids
P. Venkataramana1, P. Vijaya Kuamr2, B. Bala Krishna3

1P. Venkataramana, Research Scholar, Department of Mechanical Engineering, JNTUK, Santhiram Engineering College, Nandyal (Andhra Pradesh), India.
2P. Vijaya Kuamr, Department of Mechanical Engineering, LBRCE, Mylavaram (Andhra Pradesh), India.
3B. Bala Krishna, Department of Mechanical Engineering, JNTUCEK, Kakinada (Andhra Pradesh), India.
Manuscript received on 27 February 2019 | Revised Manuscript received on 14 March 2019 | Manuscript Published on 17 March 2019 | PP: 135-140 | Volume-7 Issue-ICETESM18, March 2019 | Retrieval Number: ICETESM32|19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: The closed-loop pulsated heat pipe is a self-excited operated thermally with a two-phase heat transfer system, which controls the functioning of heat from one place to another place with no temperature drop. The Experiment is conducted on a single closed-loop pulsated heat-pipe is made of brass with various filled ratios 40%, 50%, 60%, 70% and 80%. Experimental investigations are conducted for the heat inputs ranging from 20 watts – 100 watts. The utility of other than conventional fluids were not used by any researcher and hence try to estimate the performance of PHP using azeotrope mixtures as working fluids. When used as a mixture they exhibit less boiling point rather than individual components. In this regard azeotrope mixtures of ethanol-water having weight proportions’ of 90.5% and 4.5%, respectively, and acetone/water, acetone/ethanol having volume ratios 1 : 1 is utilized as working fluids under the experimental way. Performance of a PHP has been derived in terms of estimation of thermal resistance or coefficient of heat transfer. Out of various mixtures verified based on that attains less thermal resistance or maximum heat transfer coefficient would be considered as a most suitable working fluid for PHP operation.
Keywords: Single Loop Pulsating Heat Pipe, Heat Transfer Coefficient, Thermal Resistance, Temperature.
Scope of the Article: Heat Transfer