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首页> 外文会议>日本伝熱シンポジウム >Boiling Heat Transfer Characteristics of Lead-bismuth/Steam-water Direct Contact Two-phase Flow (The 1st Report, Experimental Study)
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Boiling Heat Transfer Characteristics of Lead-bismuth/Steam-water Direct Contact Two-phase Flow (The 1st Report, Experimental Study)

机译：沸腾传热特性铅铋/蒸汽 - 水直接接触两相流（第1次报告，实验研究）

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摘要

Characteristics of direct contact boiling heat transfer in lead-bismuth/steam-water two-phase flow was investigated experimentally using a high pressure lead-bismuth-steam-water loop. Water was injected into Pb-Bi flow at the outlet of an electric heater pin bundle and subsequently boiled in a vertical circular tube. Local temperatures in the test tube were measured under the conditions: the system pressure of 7MPa, Pb-Bi inlet temperature of 460°C, and the injected water temperature of 220°C. Overall volumetric heat transfer coefficient was estimated from heat transfer rate. The overall heat transfer coefficient decreased with the superheat at low injection flow rate and was nearly constant for high injection flow rate. The local heat transfer coefficient was higher than average one in the whole tube, which means that the direct contact boiling heat transfer coefficient was high near the injection region.
机译：使用高压铅 - 铋 - 蒸汽 - 水环实验研究了铅 - 铋/蒸汽水两相流中直接接触沸腾热传递的特性。将水注入电加热器销束的出口处的PB-BI流中，随后在垂直圆管中煮沸。试管中的局部温度在条件下测量：7MPa，Pb-Bi入口温度为460℃的系统压力，注射水温为220℃。总体体积传热系数估计来自传热速率。在低注射流速下，总传热系数随超漏流降低，并且对于高注射流速几乎是恒定的。局部传热系数高于整个管中的平均值，这意味着直接接触沸腾的传热系数高于注射区域附近。

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