J0230102 Heat Transfer Characteristics of a Thermosyphon Fabricated on a Plastic Plate : Fundamental Experiments Using Water and Ethanol

Fundamental experiments have been conducted on the heat transfer characteristics of the thermosyphon fabricated on the plastic plate by using water and ethanol as the working fluid. The thermosyphon is the gravity-assisted thermal device to transport heat by utilizing the latent heat of evaporation and condensation of the working fluid; it works without any external power. In experiments, the temperature distributions of the thermosyphon with water and ethanol are measured respectively by changing the heat input and the liquid volume inside the thermosyphon. The experimental results are shown on the transient and the steady-state heat transfer characteristics of the thermosyphon. The discussion is also made on the difference between the cases of water and ethanol. Furthermore, based on the thermal resistance network model, the effective thermal conductivity of the thermosyphon is evaluated. It is confirmed that the heat transfer performance of the thermosyphon with water is better than that with ethanol in the present experimental range.