• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>other >Horizontal convective boiling of R448A R449A and R452B within a micro-fin tube
【2h】

Horizontal convective boiling of R448A R449A and R452B within a micro-fin tube

机译：微翅片管内R448AR449A和R452B的水平对流沸腾

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This article presents local convective boiling measurements in a micro-fin tube for three low global warming potential refrigerants: R448A, R449A, and R452B. An existing correlation was modified to predict multi-component mixtures, which predicted 98% of the measurements to within ±20%. The new correlation was used to compare the heat transfer coefficient of the three test fluids at the same heat flux, saturated refrigerant temperature, and refrigerant mass flux. The resulting comparison showed that refrigerant R452B exhibited the highest heat transfer, in large part due to its approximately 28% larger liquid thermal conductivity and smaller temperature glide as compared to the tested low-global warming potential refrigerants. For the example case, the heat transfer coefficient for R449A was approximately 8% larger than that for R448A, while the heat transfer coefficient for R452B was more than 59% larger than either R448A or R449A. The heat transfer coefficients for R448A and R449A were roughly between 26 and 48% less than that of R404A for the example case. In contrast, the model predicts that the R452B heat transfer coefficient was approximately 13% larger than that of R404A for the same conditions.
机译：本文介绍了在微翅片管中对三种低全球变暖潜能的制冷剂：R448A，R449A和R452B 的局部对流沸腾测量。修改了现有的相关性以预测多组分混合物，该混合物将98％的测量值预测在±20％以内。新的相关性用于比较三种测试流体在相同热通量，饱和制冷剂温度和制冷剂质量通量下的传热系数。结果比较表明，制冷剂R452B表现出最高的热传递，这在很大程度上是由于与经测试的低全球变暖潜能的制冷剂相比，制冷剂R452B的液体导热系数高约28％，温度滑移较小。对于示例情况，R449A的传热系数比R448A的传热系数大大约8％，而R452B的传热系数比R448A或R449A都大59％以上。对于示例情况，R448A和R449A的传热系数大约比R404A的传热系数小26％至48％。相反，该模型预测在相同条件下，R452B的传热系数比R404A的传热系数大约大13％。

著录项

  • 期刊名称 other
  • 作者

    MARK A. KEDZIERSKI; DONGGYU KANG;

  • 作者单位
  • 年(卷),期 -1(22),8
  • 年度 -1
  • 页码 1090–1103
  • 总页数 30
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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