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Fundamental Experiments and Numerical Analyses on Heat Transfer Characteristics of a Vapor Chamber : Effect of Heat Source Size 小糸, 康志 96172 コイト, ヤスシ Koito, Yasushi 井村, 英昭 96173 望月, 正孝 96174 齊藤, 祐士 96175 サイトウ, ユウジ Saito, Yuji 斉藤, 祐士 鳥居, 修一 146927 Torii, Shuichi トリイ, シュウイチ 小糸, 康志 96172 コイト, ヤスシ Koito, Yasushi Imura, Hideaki 96168 Mochizuki, Masataka 96169 Saito, Yuji 96170 Torii, Shuichi 96171 530 Heat Transfer Heat Pipe Thermosyphon Vapor Chamber Heat Spreader Heat Source Size application/pdf 論文(Article) A vapor chamber is used as a novel heat spreader to cool high-performance MPUs (microprocessor units). The vapor chamber is placed between small heat sources and a large heat sink. This paper describes the effect of heat source size on the heat transfer characteristics of the vapor chamber. First, by the experiments, the effect of heat source size on the　temperature distribution of the vapor chamber is investigated, and the validity of the mathematical model of the vapor chamber is confirmed. Secondly, by the numerical analyses, the effect of heat source size on the thermal resistances inside the vapor chamber is discussed. It is found that the heat source size greatly affects the thermal resistance of the evaporator section inside the vapor chamber. Although the thermal resistance is hardly affected by the heat generation rate and the heat flux of the heat source, it increases as the heat source becomes smaller. journal article 社団法人 日本機械学会 2006-11-15 VoR application/pdf JSME international journal. Ser. B, Fluids and thermal engineering 4 49 1233 1240 AA10888815 https://kumadai.repo.nii.ac.jp/record/22156/files/110004850826.pdf http://hdl.handle.net/2298/13218 https://kumadai.repo.nii.ac.jp/records/22156 eng 13408054 社団法人 日本機械学会