PCM thermal control unit for portable electronic devices: experimental and numerical studies
PCM thermal control unit for portable electronic devices: experimental and numerical studies
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DOI：
10.1109/tcapt.2003.811480
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发表时间：
2003-06
影响因子：
--
通讯作者：
E. Alawadhi;C. Amon
中科院分区：
文献类型：
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作者：
E. Alawadhi;C. Amon
本文研究了便携式电子设备的热控制单元（TCU）的有效性进行实验和数值分析。TCU的目标是改善电子设备的热管理，当它们的工作时间被限制在几个小时内。它由有机相变材料（PCM）和导热增强剂（TCE）组成。为了克服PCM相对较低的导热率，将TCE结合到PCM中以提高其导热率。TCU结构复杂，并且用它来建模电子设备需要时间和精力。因此，本研究开发了近似的，但有效的，解决方案建模的TCU，采用有效的热物理性能。TCU组件属性被平均化，并且考虑单个TCU材料。这种方法是通过比较数值预测与实验结果进行评估。数值模型，然后用于研究的重要参数，实验昂贵的检查，如PCM潜热，斯特凡数，和热源功率的影响。结果表明，TCU可以提供一个可靠的解决方案，便携式电子设备，避免过热和热致疲劳，以及满足人体工程学的要求的解决方案。
This paper investigates the effectiveness of a thermal control unit (TCU) for portable electronic devices by performing experimental and numerical analyses. The TCU objective is to improve thermal management of electronic devices when their operating time is limited to a few hours. It is composed of an organic phase change material (PCM) and a thermal conductivity enhancer (TCE). To overcome the relatively low thermal conductivity of the PCM, a TCE is incorporated into the PCM to boost its conductivity. The TCU structure is complex, and modeling an electronic device with it requires time and effort. Hence, this research develops approximate, yet effective, solutions for modeling the TCU, which employ effective thermo-physical properties. The TCU component properties are averaged and a single TCU material is considered. This approach is evaluated by comparing the numerical predictions with the experimental results. The numerical model is then used to study the effect of important parameters that are experimentally expensive to examine, such as the PCM latent heat, Stefan number, and heat source power. It is shown that the TCU can provide a reliable solution to portable electronic devices, which avoids overheating and thermally-induced fatigue, as well as a solution which satisfies the ergonomic requirement.