Experiment on Absorption and Evaporation Performance of a NH<sub>3</sub>-H<sub>2</sub>O-LiBr Absorption Chiller

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Experiment on Absorption and Evaporation Performance of a NH₃-H₂O-LiBr Absorption Chiller

更新时间：2025-07-09

- Experiment on Absorption and Evaporation Performance of a NH₃-H₂O-LiBr Absorption Chiller
- Vol. 45, Issue 3, Pages: 40-43+116(2011)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB651
- Online First：10 March 2011，
  
  Published：2011
- 稿件说明：
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Experiment on Absorption and Evaporation Performance of a NH₃-H₂O-LiBr Absorption Chiller[J]. 2011, 45(3): 40-43+116.
DOI：

Experiment on Absorption and Evaporation Performance of a NH₃-H₂O-LiBr Absorption Chiller[J]. 2011, 45(3): 40-43+116. DOI：

摘要

对1.5 kW NH

-H

O-LiBr吸收式制冷机的吸收和蒸发性能进行了实验研究.实验共采用20组溶液

其中氨的质量分数分别为50%、55%和60%

LiBr的质量分数范围为0～50%.有关吸收性能的实验结果表明

LiBr的加入并不能一直降低吸收压力

当LiBr浓度增大到一定值时

吸收压力反而升高

导致吸收效果恶化

此时的LiBr浓度称为吸收压力LiBr拐点浓度

且随着氨浓度的升高

该LiBr拐点浓度减小.有关蒸发性能的实验结果表明

发生器溶液中氨浓度一定时

相同温度下蒸发器内蒸发压力随着LiBr浓度的升高均先增大后减小.有关系统性能系数的实验结果表明

发生器溶液中氨浓度一定时

系统性能系数随着LiBr浓度的升高均先增大后减小.当w(NH

)为60%、w(LiBr)为30%时

系统最大性能系数为0.402

较二元NH

-H

O机组提高了30.94%

说明该实验结果可指导NH

-H

O-LiBr三元溶液在吸收式制冷机中的应用.

Abstract

Experiments were carried out on the absorption and evaporation performance of an NH

-H

O-LiBr absorption chiller with a refrigerating capacity of 1.5 kW. Twenty groups of solutions were tested in the experiment with different NH

concentration of 50%

55% and 60% and the LiBr concentration from 0 to 50%. The results show that the absorption pressure would not consistently decrease with an increase in LiBr in the solution. When the LiBr concentration reached an inflexion value

the absorption pressure would rise

leading to the deterioration of the absorption process

and the LiBr inflexion value wo

uld decrease with an increase in NH

concentration. Moreover

the evaporation pressure would rise at first and then decline with an increase in LiBr concentration when the NH

concentration in the generator and the temperature in the evaporator were unchanged during the process. In addition

the COP would increase at first and then decrease with an increase in LiBr concentration at certain NH

concentration in the generator. The maximum COP of the system with the NH

concentration of 60% and the LiBr concentration of 30% was 0.402

30.94% higher than that of an NH

-H

O refrigeration system.

关键词

Keywords

references

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STEIU S, SALAVERA D, BRUNO J, et al. A basis for the development of new ammonia-water-sodium hydroxide absorption chillers[J]. International Journal of Refrigeration, 2009, 32(4):577-587.

BALAMURU V, IBRAHIM O, BARNETT S. Simulation of ternary ammonia-water-salt absorption refrigeration cycles[J]. International Journal of Refrigeration, 2000, 23(1):31-42.

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SUN D. Comparison of the performances of NH3-H2O, NH3-LiNO3 and NH3-NaSCN absorption refrigeration systems[J]. Energy Convers, 1998, 39(5):357-368.

靳华栋, 孙淑凤, 王立. 吸收式制冷用氨-硝酸锂工质对及循环系统的研究[J]. 低温与超导, 2007,35(1):65-68.

JIN Huadong, SUN Shufeng, WANG Li. The study of ammonia-lithium nitrate mixtures and absorption refrigeration cycle[J]. Cryogenics and Superconductivity, 2007,35(1):65-68.

AHLBY L, HODGETT D, RADERMACHER R. NH3-H2O-LiBr as working fluid for the compression/absorption cycle [J]. International Journal of Refrigeration, 1993, 16(4):65-73.

WU Yuyuan, CHEN Yan, WU Tiehui. Experimental researches on characteristics of vapor-liquid equilibrium of NH3-H2O-LiBr system [J]. International Journal of Refrigeration, 2006, 29(2):328-335.

禹志强,吴铁辉,吴裕远,等. 氨-水和氨-水-溴化锂在吸收式制冷机中的对比实验研究[J].西安交通大学学报, 2009, 43(3):46-49.

YU Zhiqiang, WU Tiehui, WU Yuyuan, et al. Experimental comparison between ammonia-water and ammonia-water-lithium bromide in absorption chiller[J]. Journal of Xi'an Jiaotong University, 2009,43(3):46-49.

何树青, 吴铁晖, 吴裕远, 等. NH3-H2O-LiBr 三元溶液特性的理论和实验研究[J]. 上海交通大学学报, 2009, 43(10):1609-1211.

HE Shuqing, WU Tiehui, WU Yuyuan, et al. Experimental investigation on characteristics of vapor-liquid equilibrium of NH3-H2O-LiBr system[J]. Journal of Shanghai Jiaotong University, 2009, 43(10):1609-1211.

何树青, 吴铁晖, 吴裕远, 等. 溴化锂对NH3-H2O-LiBr 三元溶液特性作用机理的初步研究[J]. 西安交通大学学报, 2008,42(7):848-851.

HE Shuqing, WU Tiehui, WU Yuyuan, et al. Mechanism of action of LiBr on characteristics of NH3-H2O-LiBr ternary solution[J]. Journal of Xi'an Jiaotong University, 2008,42(7):848-851.

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Experiment on Absorption and Evaporation Performance of a NH3-H2O-LiBr Absorption Chiller

DOI：

摘要

Abstract

关键词

Keywords

references

Experiment on Absorption and Evaporation Performance of a NH₃-H₂O-LiBr Absorption Chiller