Experimental Investigation of Pulsating Heat Pipe

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Jamshidi, Hamed | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39098 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Shafiee, Mohammad Behshad
Abstract:
Pulsating heat pipes (PHP) are complex heat transfer devices which unlike conventional heat pipes do not contain any wick in their structure. The effective parameters consist of; working fluid, volumetric filling ratio, operational orientation and input heat power have been investigated here. The experimental set-up we have contemplated, fabricated and tested included five turns, made of copper tube coupled with two glass tube of internal diameter 1.8 mm. The height of evaporator, condenser and adiabatic section was 60, 60 and 150 mm, respectively. The evaporator was heated with electrical element connected to an AC variant power supply and the condenser was connected to a constant temperature water cool bath. The working fluids employed were water, ethanol, silver-water nanofluid and Tio2-water nanofluid. The results indicate that 40% filling ratio has the best performance for water and 50% for ethanol. The PHP will work independent of inclination angle. Also, the results show that nanofluid has a better performance as working fluid
Keywords:
Experimental Investigation ; Nanofluid ; Heat Resistance ; Pulsating Heat Pipe

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