LiCl溶液垂直管外降膜发生效果的实验

doi:10.11949/j.issn.0438-1157.20161415

化工学报 ›› 2016, Vol. 67 ›› Issue (S2): 87-93.DOI: 10.11949/j.issn.0438-1157.20161415

LiCl溶液垂直管外降膜发生效果的实验

梁之琦, 徐孟飞, 殷勇高

东南大学能源与环境学院, 江苏南京 210096

收稿日期:2016-10-08 修回日期:2016-11-06 出版日期:2016-12-30 发布日期:2016-12-30
通讯作者: 殷勇高
基金资助:
国家自然科学基金项目（51376043）；霍英东教育基金会高等院校青年教师基金项目（141052）。

Effect of falling-film generation outside vertical tube with lithium chloride aqueous solution

LIANG Zhiqi, XU Mengfei, YIN Yonggao

School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2016-10-08 Revised:2016-11-06 Online:2016-12-30 Published:2016-12-30
Supported by:
supported by the National Natural Science Foundation of China (51376043) and the Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (141052).

摘要/Abstract

摘要：

为了探究LiCl水溶液在低位太阳能吸收式制冷系统中的发生过程中的传热传质效果，在降膜发生实验装置基础上研究了LiCl水溶液在垂直管外降膜发生的传热传质过程。阐述了不同运行工况如不同的热水和溶液的流量、热源的温度、溶液的浓度和系统压力对LiCl水溶液发生过程传热传质效果的影响。同时也进行了相同工况下LiBr水溶液的对比实验。结果表明相同运行工况下LiCl水溶液降膜发生过程和LiBr水溶液的降膜发生过程有着相似的变化规律。虽然LiCl水溶液的垂直降膜发生速率略低于LiBr水溶液，但传质效果相差不大，LiCl溶液的低运行浓度有利于循环热力性能的提升。

关键词: 实验验证, 垂直管, 降膜, 传质过程, LiCl水溶液, 层流

Abstract:

An experimental investigation of falling-film generation outside vertical tube with lithium chloride aqueous solution was conducted.For the purpose of the development of a high performance of heat and mass transfer utilizing a lithium chloride aqueous solution as the working pair in solar absorption refrigeration system which use the low grade source, an experimental apparatus is set up to study the process of heat and mass transfer in generator using low temperature source.The experiments show that how the operation conditions such as the flow rate of hot water and the solution, the temperature of the heat source, the concentration of the solution and the system pressure influent the generation process.Some contrast experiments at the same condition with lithium bromide are carried on.The variation trend of the vertical falling film generation with lithium chloride aqueous solution is similar with that with lithium bromide aqueous solution.Although the mass rate of falling film generation with lithium chloride aqueous solution is slightly lower than that using lithium bromide aqueous solution, it has little difference in the effect of heat and mass transfer, and it is good for the performance of the system cycle which using the two working pairs becoming higher at the same condition because of the low operation concentration of lithium chloride aqueous solution.

Key words: experimental validation, vertical tube, falling-film, mass transfer, lithium chloride aqueous solution, laminar flow

中图分类号:

TB657.5

梁之琦, 徐孟飞, 殷勇高. LiCl溶液垂直管外降膜发生效果的实验[J]. 化工学报, 2016, 67(S2): 87-93.

LIANG Zhiqi, XU Mengfei, YIN Yonggao. Effect of falling-film generation outside vertical tube with lithium chloride aqueous solution[J]. CIESC Journal, 2016, 67(S2): 87-93.

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LiCl溶液垂直管外降膜发生效果的实验

Effect of falling-film generation outside vertical tube with lithium chloride aqueous solution

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