Carbon nanotubes (CNTs) are one of the most valuable materials with high thermal conductivity (2000 W/m · K compared with thermal conductivity of Ag 419 W/m · K). This suggested an approach in applying the CNTs in thermal dissipation system for high power electronic devices, such as computer processor and high brightness light emitting diode (HB-LED). In this work, multiwalled carbon nanotubes (MWCNTs) based liquid was made by COOH functionalized MWCNTs dispersed in distilled water with concentration in the range between 0.2 and 1.2 gram/liter. MWCNT based liquid was used in liquid cooling system to enhance thermal dissipation for computer processor. By using distilled water in liquid cooling system, CPU's temperature decreases by about 10°C compared with using fan cooling system. By using MWCNT liquid with concentration of 1 gram/liter MWCNTs, the CPU's temperature decreases by 7°C compared with using distilled water in cooling system. Theoretically, we also showed that the presence of MWCNTs reduced thermal resistance and increased the thermal conductivity of liquid cooling system. The results have confirmed the advantages of the MWCNTs for thermal dissipation systems for the μ-processor and other high power electronic devices.
展开▼
机译:碳纳米管(CNTs)是最有价值的材料,具有较高的热导率(2000 / W / m·K与Ag 419 W / m·K的热导率相比)。这提出了将CNTs应用于散热系统中的方法,该散热系统用于大功率电子设备,例如计算机处理器和高亮度发光二极管(HB-LED)。在这项工作中,通过将COOH官能化的MWCNT分散在蒸馏水中而制成的多壁碳纳米管(MWCNT)基液体,其浓度范围为0.2至1.2微克/升。基于MWCNT的液体被用于液体冷却系统中,以增强计算机处理器的散热。通过在液体冷却系统中使用蒸馏水,与使用风扇冷却系统相比,CPU的温度降低了约10°C。通过使用浓度为1微克/升MWCNT的MWCNT液体,与在冷却系统中使用蒸馏水相比,CPU的温度降低了7°C。从理论上讲,我们还表明,多壁碳纳米管的存在降低了热阻,并增加了液体冷却系统的热导率。结果证实了MWCNT在μ处理器和其他大功率电子设备的散热系统中的优势。
展开▼