Thermal Performance of a Two Phase Closed Thermosyphon Charged with Different working Fluids

Abstract

In this study, thermal performance of two phase closed thermosyphon was investigated experimentally for various filling ratio from 30% to 90% and with various operating temperature range from 30°C to 70°C in heat input range of 0 to 1200W. Copper tube of 1000mm length with 6.7mm inside diameter and 8mm outside diameter were employed. A series of experiment were carried out to investigate the maximum heat transfer capabilities of water, ethanol, methanol and acetone and to compare the maximum heat transfer rate of water, with ethanol, methanol and acetone. The result showed the maximum heat transport capability of water is high compared to that of other working fluids such as ethanol, methanol and acetone, at all filling ratios and at all operating temperatures. And also the maximum heat transport capability increases with increasing operating temperature.