Cascade straight heat pipe for computer cooling system with nanofluid

Abstract

Computer Central Processing Unit (CPU) technology is being developed rapidly for better work performance together with smaller size. This technology development produces significant heat flux increase on the processor. In this paper, a cascade straight heat pipe (CSHP) is created for a better CPU cooling system which is a fully passive system using nanofluids and hybrid nanofluid as the working fluid. Heat loads were given to the CSHP at 10 watts, 20 watts, 30 watts, and 40 watts, respectively. Based on the experiment's result, the CSHP with Al2O3-TiO2-water working fluid showed the best performance, decreasing 41.872% of the simulator plate temperature at maximum load while also having the highest condenser output temperature. The CSHP with Al2O3-water working fluid decreased 35.243% of the simulator plate temperature. The CSHP with water working fluid decreased only 28.648% of the simulator plate temperature and had the lowest condenser output temperature. The CSHP with Al2O3-TiO2-water showed the lowest thermal resistance and the highest coefficient of heat transfer.