摘要
结合Danckwerts的界面更新模型,初步分析了纳米颗粒强化氨水鼓泡吸收过程的机理。改变不同的氨气流量和基液氨水浓度,进行了Al2O3纳米颗粒对氨水鼓泡吸收性能的强化实验。实验表明:Al2O3纳米颗粒对氨水鼓泡吸收性能具有强化效果;在实验条件下,加纳米颗粒的吸收效果最大可以达到没有加纳米颗粒的1.22倍;在保持其它条件一定时,随着氨气流量增加,溶液吸收率增加,但有效吸收率出现有增大也有减小的不规律特征,而随着基液氨水浓度的增加,有效吸收率增加比较明显。为研制小型氨水吸收式制冷机的鼓泡式吸收器提供参考。
From the Danckwerts theoretical surface renewal model of mass transfer, an approach using nanoparticles to enhance ammonia bubble absorption process was examined in this study. In our experiment, the ammonia vapor flow flux and the concentration ratio of bulk ammonia solution were adjusted and their effects on ammonia bubble absorption were explored. The experimental results show that the absorption ratio was significantly increased by adding Al2O3 nanoparticles in the bulk solution, and the effective absorption ratio could reach 1.22 times that without Al2O3 nanoparticles in the bulk solution. In addition, the increase in the concentration ratio of ammonia solution enhanced the effective absorption ratio clearly while the variation of the ammonia vapor flow flux did not exhibit consistent positive influence on absorption process.
出处
《制冷学报》
CAS
CSCD
北大核心
2010年第1期31-34,共4页
Journal of Refrigeration
基金
国家自然科学基金(50606027)资助项目
上海市研究生教育创新计划项目(JWCXSL0901)
上海市重点学科建设项目(S30503)资助~~
关键词
工程热物理
强化吸收
纳米颗粒
氨水
鼓泡
Engineering thermophysics
Absorption enhancement
Nanoparticles
Ammonia
Bubble
