1 0 0 0 OA ベーパーチャンバーの伝熱特性に関する基礎実験と数値解析 熱源サイズの影響
- 著者
- 小糸 康志 井村 英昭 望月 正孝 齊藤 祐士 鳥居 修一
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.72, no.714, pp.404-411, 2006-02-25 (Released:2011-03-03)
- 参考文献数
- 12
- 被引用文献数
- 1
A “Vapor Chamber” is used as a novel heat spreader to cool high-performance MPUs (micro-processor 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.
1 0 0 0 二相二重管熱サイホン内の伝熱特性
- 著者
- 井村 英昭 吉田 正道
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.56, no.532, pp.3816-3820, 1990-12-25
- 被引用文献数
- 4
An experimental study on the heat transfer coefficient and critical heat flux in two-phase double-tube thermosyphons was carried out using water, ethanol and R113 as the working liquids. The same experiment for a single-tube thermosyphon was also performed for comparison. The effects of the top-end shape of inner tubes on the heat transfer coefficient and the critical heat flux were investigated in detail. As a result, it was shown that the heat transfer coefficient was not significantly affected by the difference of the top-end shape, but the critical heat flux was very sensitive to the top-end shape of the inner tubes. For R113, the critical heat flux in the thermosyphon with the inner tube having a T- or flange-shape top-end, was about four times as large as that in the single-tube thermosyphon.