...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Heat Transfer Engineering >Mitigation of Temperature Gradients in the Buffer Tank of a Natural Circulation Loop Simulating Passive Decay Heat Removal in a Pool Type Reactor
【24h】

Mitigation of Temperature Gradients in the Buffer Tank of a Natural Circulation Loop Simulating Passive Decay Heat Removal in a Pool Type Reactor

机译：天然循环回路缓冲罐中的温度梯度减轻模拟泳池型反应器中的被动衰减热量去除

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study considers the decay heat removal through passive systems (i.e., natural convection) in the pool-type experimental reactor MYRRHA (SCK·CEN). The low velocities associated with natural convection may cause a degradation of the thermal mixing in the upper plenum of the reactor: buoyancy dominated phenomena, such as stratification, buoyant jets or convective cells may occur. The large temperature gradients associated with these phenomena may induce thermal loads on the structure, compromising its integrity. The objectives of this work are, in order, (1) achieving an understanding of the fluid mechanics leading to the formation of thermal gradients in the upper plenum and (2) mitigating the temperature gradients the upper plenum's geometry. The methodology chosen to address the problem is experimental. A "two-dimensional" water facility modeling a slab of the reactor's primary loop was designed. Simultaneous measurements of velocity and temperature were performed in the model's buffer tank using thermocouples and innovative optical imaging techniques. It was observed that vertical thermal gradients develop in the tank because of the combined effect of stratification and advection. Important reductions of local gradients were observed when changing porosity and position of upper plenum's buffer plates.
机译：本研究考虑了通过池型实验反应器Myrrha（SCK·CEN）中的无源系统（即自然对流）通过被动系统（即自然对流）进行衰变热除去。与天然对流相关的低速度可能导致反应器的上层中的热混合的劣化：可能发生浮力主导的现象，例如分层，浮力喷射器或对流细胞。与这些现象相关的大的温度梯度可能导致结构上的热负荷，损害其完整性。本工作的目标是（1）实现了对流体力学的理解，导致上部增压室中的热梯度的形成和（2）减轻了上层压力梯度的温度梯度。选择解决问题的方法是实验性的。设计了“二维”水设施，建模了反应堆主要环路的板坯。使用热电偶和创新的光学成像技术在模型缓冲罐中进行速度和温度的同时测量。观察到垂直热梯度由于分层和平流的综合效应而在罐中开发。在更换上层缓冲板的孔隙度和位置时，观察到局部梯度的重要减少。

著录项

  • 来源
    《Heat Transfer Engineering》 |2020年第18期|1315-1340|共26页
  • 作者

    Chiara Spaccapaniccia; Philippe Planquart; Jean-Marie Buchlin;

  • 作者单位

    von Karman Institute for Fluid Dynamics Rhode Saint Genese Belgium;

    von Karman Institute for Fluid Dynamics Rhode Saint Genese Belgium;

    von Karman Institute for Fluid Dynamics Rhode Saint Genese Belgium;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号