The Experimental Study On Straight Heat Pipe Performance With Different Working Fluids For Automobile Passive Cooling Applications Ragil Sukarno*, Muhammad Samudera Zahran, Rizky Nahdatul, Riyadi, Eko Arief Syaefudin, Danar Hari Krisyono
Department of Mechanical Engineering,
Universitas Negeri Jakarta,
Jl. Rawamangun Muka, Jakarta Timur 13220, Indonesia
Abstract
The air conditioning system in a car^s cabin is essential for ensuring passenger comfort. On the other hand, the energy requirements for the AC system are very high. The use of heat pipes as energy-recovery equipment in HVAC systems in the building has proven to be efficient. Most commercial heat pipes currently employ water as their working fluid. However, improvements in heat pipe performance are urgently needed. The study aims to determine the effect of different working fluids and filling ratio on the thermal performance of heat pipe. The working fluids in heat pipes were varied to include deionized water, methanol, and acetone, with a filling ratio of 20%. The heat pipe used was made of copper with a total length of 700 mm and an outer diameter of 10 mm. The results show that heat pipe with acetone yields the best thermal performance compared to deionized water and methanol, by the lowest thermal resistance. These results are expected to serve as a guide for selecting heat pipe working fluids and filling ratio in the automobile passive cooling applications.
Keywords: heat pipe, working fluids, temperature, thermal resistance, passive cooling
