Experimental Investigation of Design Parameters on Oscillating Heat Pipe (OHP) Based Waste Heat Recovery System

• Main Author: Kaya, Mustafa Nezih
• Other Authors: Alta Knizley
• Format: Others
• Language: en
• Published: MSSTATE 2018
• Subjects: Mechanical Engineering
• Online Access: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04192018-130159/

<p>In this research, we quantify the parametric effects (number of turns, inclination angle, and filling ratio) on different designs of closed loop oscillating heat pipes (CLOHPs). Experiments were conducted on a CLOHP, which is made of copper tube with 1.65-mm inner diameter. Tubes are heated and cooled by constant temperature in wind tunnels, and n-pentane was used as the working fluid. The numbers of turns used were 5, 7, and 9. The effects of number of turns were investigated in order to prove the less gravity effect when the number of turns increases. Inclination angles used were 75, 82.5, and 90-degree. Inclination angle effects were investigated to verify that inclination angle decreases the affects of gravitational force. The tubes were charged to 0 and to 70 percent of total volume of tubes with n-pentane to demonstrate optimum heat transfer between condenser and evaporation sections. The importance of this work is in presenting design parameters to obtain lower energy consumption in comparison to previous known designs. Results indicate that 9 turns, 90-degree inclination angle, and charging 70 percent n-pentane of tubes were the most effective design parameters.</p>