Study on Heat and Mass Transfer Performance of the Absorber Covered with Net on the Pipe Surface in a LiBr-H2O Absorption Chiller
The absorber is one of important components in Lithium-bromide/water (LiBr-H2O) absorption chiller. During refrigeration the refrigerant vapor(water vapor)is absorbed by LiBr-H2O concentrated solution inner at regulated working conditions. Improving the absorbing efficiency of absorber is the crucial factor to increase the COP of double-effect LiBr-H2O absorption refrigerating machine. In the paper, the mathematical model of falling-film absorber was established based on double-effect LiBr-H2O absorption refrigerating cycle, and install stainless steel screen on the surface of pipe of shell-pipe absorber. With the aid of wicking action of reticulation material, it can make the LiBr aqueous solution stay on the pipe surface longer advisably, i.e. increasing the liquid adhesive ability of the pipe appearance, this can ensure the liquid film clinging to the wall surface to strengthen falling film ability, and then strengthen heat and mass transfer efficiency. However, the time of liquid attachment can not last too long, otherwise the solution circulating efficiency would bring down and decline the heat and mass transfer effect.
Falling-film absorber Wicking action Heat and mass transfer LiBr-H2O absorption refrigeration
Xie G Z Fa X M
Beijing University of Civil Engineering and Architecture,Beijing 100044,P.R.China
国际会议
上海
英文
461-465
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）