International Journal of Advanced Innovative Technology in Engineering (IJAITE)

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Experimental Study on Thermal Performance of a Closed Loop Pulsating Heat Pipe

Dr. P. R. Wadnerkar, Ku. Vaishnavi S. Sonar, Prof. Vijay G. Gore

Abstract :

Pulsating heat pipes (PHP) have created a newer arena and promising possibilities as passive devices for heat transfer applications, especially suited for thermal management of electronics. A closed-loop pulsating heat pipe (CLPHP) made of copper with 2.5 mm ID and 3 mm OD with fin in the condenser section is used in the present work to evaluate the heat transfer performances where the evaporation section is 50 mm, the adiabatic section is 120 mm and condensation section is 80 mm. The attempt is to study on an experimental basis the heat transfer performances of CLPHP for two working fluid conditions. Acetone and Ethanol are used as working fluids with 60% filling ratio to 100% filling ratio in CLPHP with 3 loops during the experiment. The experimental results indicate a strong influence of gravity and thermophysical properties of the working fluid on the performance of the CLPHP studied with different orientations and heat loads. The results demonstrate the effect of heat by operated working fluid used in the condenser section, the input heat flux, and physiochemical properties of the working fluid on the thermal performance of the device. The CLPHP at 0o inclination exhibit the considerable enhancement of heat transfer in the condition of acetone as working fluid compared with that of ethanol as working fluid inside the CLPHP. The results indicate that the performance of CLPHP changes with different fill ratio and heat loads. Better heat transfer performance was obtained from Acetone rather than ethanol for same heat load parameters during experimentation.

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