Thermal Resistance of Cascade Heat Pipe as CPU Cooling System to  Maintain Safe Temperature for Computer

Wayan Nata Septiadi; Fazlur Rahman; Made Ricki Murti; Komang Wahyu Tri Prasetia; Gerardo Janitra Puriadi Putra; Luh Putu Ike Midiani; Luh Putu Ike Midiani; Nandy Putra

Authors

Wayan Nata Septiadi Department of Mechanical Engineering, Udayana University, Kampus Unud Bukit Jimbaran, Badung-Bali 80361, Indonesia
Fazlur Rahman Department of Mechanical Engineering, Udayana University, Kampus Unud Bukit Jimbaran, Badung-Bali 80361, Indonesia
Made Ricki Murti Heat Transfer Laboratory, Department of Mechanical Engineering, Udayana University, Kampus Unud Bukit Jimbaran, Badung-Bali 80361, Indonesia
Komang Wahyu Tri Prasetia Department of Mechanical Engineering, Udayana University, Kampus Unud Bukit Jimbaran, Badung-Bali 80361, Indonesia
Gerardo Janitra Puriadi Putra Department of Mathematics, College of Sciences, University of Basrah, Basrah, Iraq
Luh Putu Ike Midiani Mechanical Engineering Department, Bali State Polytechnic, Kampus Bukit Jimbaran, Badung-Bali 80361, Indonesia
Luh Putu Ike Midiani Mechanical Engineering Department, Bali State Polytechnic, Kampus Bukit Jimbaran, Badung-Bali 80361, Indonesia
Nandy Putra Department of Mechanical Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok, Indonesia

Keywords:

Cascade heat pipe, thermal resistance, Cooling system, CPU, Safe temperature

Abstract

Computer will overheat quickly if used in a state of full load continuously. One component on a computer that generates heat is the central processing unit (CPU) which is a key component on a computer where program instructions are processed. One of the right solutions to cool the CPU is the use of heat pipes as cooling system, using several size containers, loaded with a special liquid liquid to deliver the heat from the evaporator zone to the other end called condenser zone, but because the heat pipe condenser output temperature is still high therefore a cascade heat pipe was created to lower the output temperature. In this study there are four CPU cooling systems used namely single condenser cascade heat pipe and a double condenser cascade heat pipe, while others two cooling systems as a comparison namely non-cascade heat pipe and non-cascade heat pipe with fan. This study aims to find out the cooling performance of cascade heat pipe as CPU cooling system in a small form factor desktop PC by testing variations in workload, the workload given is idle load (12W) where the processor only runs the operating system without the software load so the processor utilization is only 1% -10%. Next is the medium load (30W) that uses 2 threads with processor utilization of 50% -90%. The last workload is full load (35W) with the number of threads used being 4 with processor utilization of 90% -100%. This research found that the thermal resistance of the cascade heat pipe tended to be higher than that of the non-cascade heat pipe, however the increase that occurred was not too large compared to the resulting performance of 60.2°C in the processor and 40.4°C in the heat sink for the cascade double condenser, the operating temperature of the CPU does not increase significantly as the thermal resistance increases on the cascade heat pipe.