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써멀 그리스의 열전달계수에 따른 CPU 온도변화에 관한 비교
심재웅,조홍종,조규창,곽준재,금성민 한국기계기술학회 2021 한국기계기술학회지 Vol.23 No.2
In this study, the effect of thermal grease and heat sink material of cooler on CPU temperature was measured and compared with LinX(v0.9.6) and HWMonitor.When the computer is booted without thermal grease applied, the CPU temperature rises rapidly, and the CPU temperature reaches 100℃ after 60 seconds for aluminum heat sink and 140 seconds for copper heat sink. The CPU temperature is lower as the thermal conductivity coefficient of thermal grease is higher, and the CPU temperature is lower when the thermal conductivity coefficient of the cooler is higher. In addition, when using a thermal grease and a heat sink with a high coefficient of thermal conductivity, the cooler rpm can be lowered, which is considered to be advantageous in terms of system stability and energy saving.
고열전도성 재료를 첨가한 서멀그리스의 열전달성능에 관한 연구
박상혁(Sang-Hyeok Park),백성미(Sung-Mi Back),양진호(Jin-Ho Yang),허선철(Sun-Chul Huh) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
The heat dissipation performance of the CPU package greatly affects the performance and lifetime of the CPU. Thermal grease is a kind of TIM, which removes the air layer between the heat spreader and the heat sink during the heat dissipation process of the CPU, so that the heat dissipation smoothly proceeds. However, if thermal grease with low heat transfer performance is used, heat dissipation rate is slowed down. In this study, thermal grease with high performance was prepared by mixing nanoparticles of graphene and metal with high thermal conductivity into thermal grease, and the heat transfer rate was measured. The results showed that the thermal grease mixed with graphene and silver was efficient and the thermal grease with graphene was the most efficient.
CNT 열전달 물질에 의한 50W LED의 방열 성능평가
조영태(Young-Tae Cho),이충호(Choong-Ho Lee) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.6
In this study, cooling and heat-transfer tests are performed to compare and evaluate the thermal conductivity in a prepared CNT TIM (thermal interface material). A polymerized CNT heat-transfer resin and commercial thermal grease (Shinetsu G-747) were applied for a comparison test in both cases. Cooling experiments with an aluminum foil specimen were performed in order to measure the temperature distribution using an infrared camera, and in heat radiation experiments, performance testing of the thermal conductivity was conducted using high-power LEDs. Carbon resin with the polymerization of graphite and carbon black, and CNT-polymerized CNT resin with graphite and carbon black were tested and compared with using G-747. It was found that the cooling performance and the heat transfer ability in both the carbon resin and the CNT-polymerized CNT resin were greater than those of G-747 because the temperature by 5.0℃ in both cases appeared lower than that of the G-747.
강하늘(Haneul Kang),김현지(Hyunji Kim),김광수(Kwangsu Kim),임성훈,허선철(Sunchul Huh) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.7
Recently, as electronic devices and main boards have been miniaturized and increased in performance, the power density of emission has been rapidly increasing. In order to improve the heat dissipation performance of the electronic device, a heat conductive material having excellent internal heat dissipation performance is used. Accordingly, in this study, nickel nano thermal grease was prepared by mixing nickel nano powder used as a heat transfer medium with silicon oil. As a result, it improved by about 190% compared to silicone base oil.