Study on Liquid Column Oscillation and Heat Transport Characteristics of Pulsating Heat Pipe Using Ethanol Aqueous Solution

Abstract

In this study, experiments were carried out using a one-turn pulsating heat pipe having a visualization flow channel. Deionized water, ethanol and ethanol aqueous solution were used as the working fluid. As a result, it was found that by using the ethanol aqueous solution, the effective thermal conductivity increases compared with deionized water and ethanol. Heat transport performances of the pulsating heat pipe were evaluated in terms of the liquid column oscillation and the liquid film formed in the flow channel.