High-performance and simplify study on replacing a secondary loop of FBR with a tank.

用水箱替代 FBR 二次回路的高性能和简化研究。

• 批准号: 10358012
• 负责人: MIYAZAKI Keiji
• 金额: $ 12.1万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10358012/
• 关键词: FBR; New IHX; Steam generator; Liquid metal; Gallium; Forced convective heat transfer; Temperature fluctuation; Safety; 温度ゆらぎ; 自然循環熱伝達

For the purpose of cost reduction of loop type FBR while keeping same safety level, we proposed AIHX (Advanced Intermediate Heat eXchanger), which is a combined IHX/SG simplified module. The long size heating apparatus was fabricated in 1998 and was used as a test channel. Liquid metal Ga was used as an intermediate heat transfer medium. In 1999, Ga circulation loop was added to the apparatus with a circulation pump, and series of forced circulation heat transfer experiments were performed with a parameter of Pe?500. A summary was described below.(1) Forced convective heat transfer characteristics of AIHX with Ga as working fluid. Heat transfer coefficient in the heating section was found to fall on a region (100【less than or equal】Pe【less than or equal】500) higher than Subboti'n equation (Nu=5+0.025PeィイD10.8ィエD1) and correlation function of Nu=5+0.05PeィイD10.8ィエD1 was obtained. In the cooling section, heat transfer coefficient fell on a region higher than Hoe's equation (Nu=0.43+0.228PeィイD10.67ィエD1), and correlation of Nu=6.34+0.256PeィイD10.67ィエD1 was obtained. These data show a good heat transfer characteristic of AIHX.(2) Temperature fluctuation and an analysis of local fluid motion and transfer mechanism In the heating section, a local flow velocity estimated by the cross correlation method showed a good agreement with the EMF value. A RMS value of temperature fluctuation was found to have a peak in a velocity change. This suggests that fluctuation is generated by temperature gradient and fluid disturbance mixed mechanism.(3) Feasibility of AIHX as a replaced heat exchanger in FBRWith using a natural convective heat transfer scaled from the present data, the heat transfer has estimated to be almost the same with or slightly better than Monju in performance. If it is designed to used with forced convection, the performance of the AIHX will be better than the present design base for Monju.

为了降低循环型快堆的成本，同时保持相同的安全水平，我们提出了AIHX （Advanced Intermediate Heat换热器），它是IHX/SG的简化组合模块。该长尺寸加热装置于1998年制造，并用作测试通道。采用液态金属Ga作为中间传热介质。1999年，在装置中加入了Ga循环回路，并配以循环泵，进行了一系列以Pe?500为参数的强制循环换热实验。摘要如下所述。(1)以Ga为工质的AIHX强制对流换热特性。发现加热段的换热系数落在一个高于Subboti方程（Nu=5+0.025Pe μ u \ \ D10.8 μ u \ \ D1）的区域（100【小于等于】Pe【小于等于】500），得到Nu=5+0.05Pe μ u \ D10.8 μ u \ D1的相关函数。在冷却段，换热系数落在高于Hoe方程（Nu=0.43+0.228Pe D10.67 D1）的区域，得到Nu=6.34+0.256Pe D10.67 D1的相关性。这些数据表明AIHX具有良好的传热特性。(2)温度波动及局部流体运动和传递机理分析在加热段，用互相关法估计的局部流速与EMF值吻合较好。温度波动的均方根值在速度变化中有一个峰值。这表明波动是由温度梯度和流体扰动混合机制产生的。(3) AIHX作为fbr替代换热器的可行性。根据现有数据，采用自然对流换热，其换热性能与Monju几乎相同或略优于Monju。如果设计成强制对流使用，AIHX的性能将优于目前文殊号的设计基地。