• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>6th international conference on nanochannels, microchannels and minichannels 2008 >DRYOUT INCIPIENCE AND CRITICAL HEAT FLUX IN SATURATED FLOW BOILING OF REFRIGERANTS IN A VERTICAL UNIFORMLY HEATED MICROCHANNEL
【24h】

DRYOUT INCIPIENCE AND CRITICAL HEAT FLUX IN SATURATED FLOW BOILING OF REFRIGERANTS IN A VERTICAL UNIFORMLY HEATED MICROCHANNEL

机译：垂直均匀加热微通道中制冷剂饱和流沸腾中的干燥倾向和临界热通量

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

The prediction of dryout occurrence is crucial in the design and safety of compact heat exchangers. For this purpose, a series of experimental tests have been performed to investigate dryout incipience and critical heat flux (CHF) in a circular vertical microchannel with internal diameter of 640 μm and a uniformly heated length of 213 mm using refrigerants R-134a, R-22 and R-245fa as working fluids. The effects of mass flux, system pressure, and refrigerant on the dryout heat flux and vapour quality are explored in detail. Finally, the experimental CHF results are compared to existing correlations both specially developed for microchannels and for macroscale geometries. The comparison shows good agreement with the classical Katto and Ohno (1984) correlation, developed for conventional large tubes. On the other hand, none of the microchannel correlations predicts in agreement the experimental data.
机译：干燥发生的预测对于紧凑型热交换器的设计和安全至关重要。为此，已使用制冷剂R-134a，R-进行了一系列实验测试，以研究内径为640μm且均匀加热长度为213 mm的圆形垂直微通道中的干燥开始和临界热通量（CHF）。 22和R-245fa作为工作流体。详细探讨了质量通量，系统压力和制冷剂对变干热通量和蒸汽质量的影响。最后，将实验性CHF结果与专门针对微通道和宏观几何结构开发的现有相关性进行比较。比较表明，它与为传统大型管开发的经典Katto和Ohno（1984）相关性很好。另一方面，微通道相关性均不能一致地预测实验数据。

著录项

  • 来源
  • 会议地点 Darmstadt(DE);Darmstadt(DE)
  • 作者

    Claudi Martin-Callizo; Rashid Ali; Bjoern Palm;

  • 作者单位

    Applied Thermodynamics and Refrigeration, Royal Institute of Technology, KTH Brinellvaegen 68, 100 44-SE, Stockholm, Sweden;

    Applied Thermodynamics and Refrigeration, Royal Institute of Technology, KTH Brinellvaegen 68, 100 44-SE, Stockholm, Sweden;

    Applied Thermodynamics and Refrigeration, Royal Institute of Technology, KTH Brinellvaegen 68, 100 44-SE, Stockholm, Sweden;

  • 会议组织
  • 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