Mohammad BANEZHAD JANNATI - Department of Mechanical Engineering, Islamic Azad University of Mashhad, Iran
Hamidreza GOSHAYESHI - Department of Mechanical Engineering, Islamic Azad University of Mashhad, Iran

Pulsating heat pipe is an efficient heat exchange device which is being used for cooling and heating recovery .In the present work, we made a closed-loop pulsating heat pipe with six U-turns and we used water in our system. Moreover the use of water-nanofluid was studied with two different filling ratios 40% and 50% and 1% mass concentration. At the end we calculated heat resistance coefficients of water and water-nanofluid in each step and compared the results and showed that 50% filling ratio was the best in our study.

Pulsating heat pipe, water-nanofluid, filling ratio, heat resistance coefficient