最小傳熱阻 的英文怎麼說
中文拼音 [zuìxiǎozhuànrèzǔ]
最小傳熱阻
英文
minimum resistance of heat tra fer-
Of the currently available coolers for electronic products with a high heat flux, microchannel heat sinks have been proved to be able to provide the best heat transfer performance and are one of the most promising coolers. the manifold microchannel ( mmc ) heat sink has many advantages such as low thermal resistance, compact structure, little amount of coolant, low flow rate, uniform temperature distribution along the flow direction and many others, so it is able to provide the best heat transfer performance : lowering the maxmal temperature and the temperature difference
在目前高熱通量電子產品冷卻器中，微通道熱沉已被證實是傳熱性能最佳且最具應用潛力的冷卻方式之一，而歧管式微通道熱沉因具有低熱阻、結構緊湊、所需冷卻液量小、沿流動方向溫度分佈均勻等優點則成為減小電子元器件換熱表面最高溫度、降低溫度變化的一種有效方法。The optimum inclination angle is between 15 ~ 20, the length of thermosyphon will not change the phase - change heat transfer coefficient of the evaporation section and the condensation, which will enlarge heat transfer area of thermosyphon and increase the heat exchange capacity. the head - on speed of wind only stranger the heat transfer of the evaporation section and the condensation section. the experiment shows that the mathematic model closely fits to the thermosyphon, moreover, the one key to resolve the thermosyphon effect lies in decreasing the thermoresistance of evaporating section and condensation section. this study can provide directions and experience in the future research
傾斜角越大，熱虹吸管總熱阻越大，最佳傾角在15 20之間;充液率過多或過少都會對傳熱性能產生不利影響，對于本實驗採用的1 . 75m 、 2m 、 2 . 5m 、 3m熱虹吸管，最佳充液率在20 % 35 %之間;管長對傳熱也有影響，管長不改變熱虹吸管蒸發段和冷凝段的換熱系數，只增加了熱虹吸管的換熱面積，增大換熱量;迎面風速的大小，起到強化熱虹吸管蒸發段和冷凝段換熱的目的。The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller thermal expansion coefficient, lower in thermal expansion, fatigue durable, good elasticity, and reduces oil consumption so as to prevent instability while revolving at high speed and obtain perfect performance
鈦合金汽門彈簧比一般鋼閥材質更輕巧、熱膨脹系數小、熱量傳導擴散更低、耐疲勞、彈性佳、減少油耗，以阻止在高速運轉下的不穩定以獲致最完美的性能表現。
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