Experimental investigation on effect of LiBr concentration and nano-particle on flow pattern and lifting capacity of bubble pump

GAO Hong-tao; LIU Hao-ran; MAO Fei; SONG Yu-chao

doi:10.16411/j.cnki.issn1006-7736.2018.03.016

2018 , Vol. 44 >Issue 3: 108 - 114

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2018.03.016

Experimental investigation on effect of LiBr concentration and nano-particle on flow pattern and lifting capacity of bubble pump

GAO Hong-tao ,
LIU Hao-ran ,
MAO Fei ,
SONG Yu-chao

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（Institute of Refrigeration & Cryogenics Engineering, Dalian Maritime University, Dalian 116026，China）

Received date: 2018-02-02

Revised date: 2018-03-16

Online published: 2024-06-27

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Abstract

In order to improve the characteristics of the bubble pump, it is necessary to understand the influence of the concentration of lithium bromide solution and the amount of nano-additive on the bubble pump flow pattern and solution lift, and the effect of different flow patterns on the solution lift. A two-stage bubble pump absorption refrigeration experiment bench was set up. Experiments were carried out by using the highspeed camera to record the movement of bubbles in a firststage riser to study the difference of flow patterns and their effect on the lift amount of solution under different conditions. The experimental results show that there are five flow patterns: bubbly flow, slug flow, plug flow, churn flow and annular flow in succession. The lift amount of solution in slug flow, plug flow and annular flow increases with increase of lithium bromide concentration in the solution and the amount of nano-CuO in the solution until the amount of nano-additives reaches 0.25%.

Key words： flow pattern in bubble pump; nano-additives; absorption refrigeration; experimental investigation

Cite this article

GAO Hong-tao , LIU Hao-ran , MAO Fei , SONG Yu-chao . Experimental investigation on effect of LiBr concentration and nano-particle on flow pattern and lifting capacity of bubble pump[J]. Journal of Dalian Maritime University, 2018 , 44(3) : 108 -114 . DOI: 10.16411/j.cnki.issn1006-7736.2018.03.016

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