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  Scopus ID: 21100926589

Experimental Analysis of Closed Loop Pulsating Heat Pipe Working with Water Based Nanofluid at Different Concentrations

Santhisree Nerella, Bhramara Panitapu, Sudheer Nakka, Maruthi Rao Chella and Kalyan Charan Agir

Abstract

The experimental investigation focused on the performance of a multi-turn closed loop pulsating heat pipe (CLPHP) with inner and outer diameters of 2 mm and 3.1 mm, respectively. This investigation was conducted under various conditions, including different fill ratios of 50% and 60%, with heat input applied at the bottom in a vertical orientation. The study employed two different working fluids: water and a water-based nanofluid containing SiO2 at varying concentrations (0.1%, 0.5%, and 1%). The addition of SiO2 nanoparticles was intended to enhance the performance of the CLPHP due to their superior thermal conductivity properties. The analysis, focusing on thermal resistance as a performance metric, confirmed that a 50% fill ratio is optimal for the CLPHP’s performance. However, at a 60% fill ratio, superior performance was observed when lower heat inputs were applied. The experimental results demonstrated that the lowest overall thermal resistance was achieved when a 1% concentration of nanofluid was added to the base fluid. This result was found to be even better than the thermal resistance achieved with pure water.

Published on: November 27, 2023
doi: 10.17756/nwj.2023-s4-031
Citation: Nerella S, Panitapu B, Nakka S, Chella MR, Agir KC. 2023. Experimental Analysis of Closed Loop Pulsating Heat Pipe Working with Water Based Nanofluid at Different Concentrations. NanoWorld J 9(S4): S177-S180.

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