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首页> 外文期刊>International Journal of Heat and Mass Transfer >Subcooled and saturated boiling of ammonia-lithium nitrate solution in a plate-type generator for absorption machines
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Subcooled and saturated boiling of ammonia-lithium nitrate solution in a plate-type generator for absorption machines

机译：吸收机用平板式发生器中氨-硝酸锂溶液的过冷饱和沸腾

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摘要

This paper presents the experimental heat transfer evaluation during subcooled and saturated boiling of ammonia-lithium nitrate solution in a fusion plate heat exchanger, acting as a vapor generator under operating conditions representative of single-effect absorption machines. The solution flow rate and outlet temperature were modified in the ranges of 0.041-0.083 kg/s and 78-97 ℃, respectively. The region where vapor bubbles begin to arise is estimated using a correlation for the wall superheat required for the onset of nucleate boiling. Results show that subcooled boiling is present in the generator. The initial boiling temperature is about 3.1 ℃ lower than the saturation temperature. The influence of the heat and mass fluxes on the boiling heat transfer coefficient is analyzed. The paper offers a correlation for the Nus-selt number, including the subcooled and saturated boiling regions.
机译：本文介绍了在熔融板式换热器中氨-硝酸锂溶液过冷和饱和沸腾过程中的实验传热评估，该换热器在代表单效吸收机的运行条件下充当蒸汽发生器。溶液流速和出口温度分别在0.041-0.083 kg / s和78-97℃的范围内进行了修改。使用发生核沸腾所需的壁过热的相关性来估计汽泡开始出现的区域。结果表明发生器中存在过冷沸腾。初始沸腾温度比饱和温度低约3.1℃。分析了热通量和质量通量对沸腾传热系数的影响。本文提供了Nus-selt数的相关性，包括过冷和饱和沸腾区域。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第18期|p.4914-4922|共9页
  • 作者

    M. Venegas; A. Zacarias; C. Vereda; A. Lecuona; R. Ventas;

  • 作者单位

    Departamento de lngenierta Termica y de Fluidos, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganes, Madrid, Spain;

    Academia de Termicas ESIME Azcapotzalco, Instituto Politecnico National, Av. De las Granjas 682, Col. Santa Catarina, 02550 D.F. Mexico, Mexico;

    Departamento de lngenierta Termica y de Fluidos, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganes, Madrid, Spain;

    Departamento de lngenierta Termica y de Fluidos, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganes, Madrid, Spain;

    Departamento de lngenierta Termica y de Fluidos, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganes, Madrid, Spain;

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

    ammonia-lithium nitrate solution; subcooled boiling; saturated boiling; heat transfer; fusion plate heat exchanger; plate generator; absorption chillers;

    机译：氨-硝酸锂溶液;过冷沸腾;饱和沸腾;传热;熔融板式换热器;板式发生器;吸收式制冷机;

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