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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 コイト, ヤスシ Koito, Yasushi 小糸 コイト Koito 康志 ヤスシ Yasushi 井村, 英昭 望月, 正孝 齊藤, 祐士 サイトウ, ユウジ Saito, Yuji 斉藤, 祐士 齊藤 サイトウ Saito 斉藤 祐士 ユウジ Yuji 祐士 鳥居, 修一 Torii, Shuichi トリイ, シュウイチ 鳥居 Torii トリイ 修一 Shuichi シュウイチ 小糸, 康志 コイト, ヤスシ Koito, Yasushi 小糸 コイト Koito 康志 ヤスシ Yasushi Imura, Hideaki Mochizuki, Masataka Saito, Yuji Saito Yuji Torii, Shuichi 社団法人 日本機械学会 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. 社団法人 日本機械学会 2006-11-15 eng journal article VoR http://hdl.handle.net/2298/13218 https://kumadai.repo.nii.ac.jp/records/22156 http://doi.org/10.1299/jsmeb.49.1233 13408054 AA10888815 JSME international journal. Ser. B, Fluids and thermal engineering 49 4 1233 1240 https://kumadai.repo.nii.ac.jp/record/22156/files/110004850826.pdf application/pdf 995.9 kB 2020-03-02