Parametric Investigation of Closed Loop Pulsating Heat Pipe with Cerium Oxide Nanofluid

In this study, a closed-loop pulsating heat pipe experimental investigation was done with ۱% wt concentration of cerium oxide/EG-water (۶۰-۴۰) nanofluid. The unsteady state measurement was done to determine the effect of heat input, filling ratio and evacuation pressure on the thermal performance of the closed-loop pulsating heat pipe. The thermal performance is assessed in terms of temperature variation, thermal resistance and effective thermal conductivity of the pulsating heat pipe. The most appropriate behaviour is observed at ۰.۰۷۹۹ bar evacuation pressure with ۵۰% FR. The lowermost thermal resistance of ۰.۱۱۶۵۹۸K/W was observed at ۰.۰۷۹۹ bar evacuation pressure and ۵۰% FR. The effective thermal conductivity value was observed as ۵۰۷۸.۳۴ W/mK at ۵۰% FR, ۰.۰۷۹۹ bar for ۸۰W heat input which is ۱۲ to ۱۳ times better than pure copper. The pulsation action inside the pulsating heat pipe is verified with the power spectral density analysis. This study supports the better performance of the heat pipe at ۵۰% FR with a lower evacuation pressure of ۰.۰۷۹۹ bar.

کلیدواژه ها:

Thermal management ، Pulsating heat pipe ، Nanofluid ، Cerium Oxide ، FFT