Experimental investigation on thermosyphon aid phase change material heat exchanger for electronic cooling applications

• Published in: Journal of energy storage Vol. 39; p. 102649
• Main Authors: Gopi Kannan, K, Kamatchi, R
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2021
• Subjects: Electronic cooling; Heat extraction; Phase change material; Stored heat power; Thermic fluids; Stored heat power; Heat extraction; Phase change material; Thermic fluids; Electronic cooling
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2021.102649

•Created setup is suitable for all desired ranges of electronic modules.•Developed model is a power-free operation that causes less operating cost.•Rate of heat dissipation is high and stored as latent heat for future usage.•Stored heat power by PCM as input of small units with minimum of 4% energy-savings.•Less maintenance due to the absence of prime mover. In this work, cooling of electronic modules is experimentally investigated using a thermosyphon aid phase change material (PCM) heat exchanger with different thermic fluids such as n-hexane, benzene and DI water respectively. The experiments are conducted simultaneously by evaluating the thermal performance of thermic fluids and heat power stored by PCM for various heat inputs ranging from 70 to 110 W. At high heat input conditions, the value of low thermal resistance, maximum convective heat transfer coefficient (CHTC) and percentage of heat extraction of n-hexane are 0.350 K/W, 185.53 W/m2K and 99.2% respectively. Low enthalpy of vapourization and a high degree of superheat is the criteria for the obtained results. Also, temperature variation in PCM during melting is analysed by the influence of vapourized thermic fluids for different heat inputs. The maximum heat power stored by PCM is found as 7.78 W for vapourized n-hexane at 110 W due to high mass flow rate and less time for reaching steady-state temperature (SST) of PCM. The solidification of PCM is noted using cold water at regular time intervals during power-off conditions and observed that n-hexane influenced molten PCM takes 25 min for complete solidification.