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首页> 外文期刊>International Journal of Heat and Mass Transfer >Enhancement of CHF in open thermosyphon with heated bottom chamber
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Enhancement of CHF in open thermosyphon with heated bottom chamber

机译：带加热的底部腔室的开放式热虹吸管中的CHF增强

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An experiment has been carried out to elucidate the critical heat flux (CHF) of an open thermosyphon with a bottom heated chamber and to enhance the CHF using a concentric-tube connecting between the heated chamber and an upper cooling chamber. The CHF data are measured for the saturated liquid of Rll3 at a different pressure and different dimension of concentric tubes. The CHF data without the inner tube are in good agreement with the existing correlation and analytical result. Heat supplied to the bottom chamber is absorbed by evaporation of liquid and vapor generated thereby makes a counter-current flow of vapor and liquid in an ordinary thermosyphon without the concentric-tube. On the other hand, in the thermosyphon with the concentric-tube by which the counter-current flow can be controlled well, the CHF can be improved as much as several times of the CHF without the inner tube at an optimum condition. The CHF is increased with an increase in the diameter of inner tube up to its optimum diameter and then decreases continuously as the inner tube diameter approaches the outer tube diameter.
机译：已经进行了实验以阐明带有底部加热室的开放式热虹吸管的临界热通量（CHF），并使用连接在加热室和上部冷却室之间的同心管来提高CHF。在不同压力和同心管尺寸的情况下，对Rll3的饱和液体测量CHF数据。不带内胎的CHF数据与现有的相关性和分析结果非常吻合。提供给底部腔室的热量通过液体的蒸发而吸收，从而产生的蒸气在没有同心管的普通热虹吸管中形成蒸气和液体的逆流。另一方面，在具有同心管的热虹吸管中，通过该同心管可以很好地控制逆流，在没有使内管处于最佳状态的情况下，CHF可以提高到CHF的几倍。 CHF随内管直径的增加而增加，直至达到最佳直径，然后随着内管直径接近外管直径而连续减小。

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