化工进展2019，Vol.38Issue(3)：1316-1323,8.DOI:10.16085/j.issn.1000-6613.2018-1075
超声强化小型溴化锂吸收式制冷机性能实验研究
Experimental investigation on the performance of small LiBr absorption refrigerator enhanced by ultrasonic waves
摘要
Abstract
With ultrasonic transducers stuck on the side walls (4 mm-thick) of a generator, the effects of ultrasonic waves (28 kHz) on the performance of an absorption refrigerator (10 kW) were experimentally investigated under two height levels of LiBr solution in the generator. The mechanism of boiling heat and mass transfer enhanced by ultrasonic waves in LiBr solution was also analyzed. For the case without ultrasonic waves, the flow rate of LiBr solution increases with the speed-motor frequency of solution pump increasing from 17 Hz to 18 Hz, the height level of the solution in the generator rises by 5 cm and the refrigeration capacity increases by 16.8％, but the COP (coefficient of performance) decreases by 44.3％.The ultrasonic waves enhance the refrigerator performance and the effects are related to the solution height levels in the generator. The refrigeration capacity and COP are improved by 19.6％ and 13.8％, respectively when the solution height level is 8-10 cm higher than the center line of the ultrasonic transducers; when the solution height level is 3-5 cm higher, the refrigeration capacity and COP are only improved by 4.7％ and 5.4％, respectively. The experimental results provide guidelines for performance improvement of small LiBr absorption refrigerators by using ultrasonic waves.关键词
吸收式制冷/传热传质/溶液泵/超声波/频率Key words
absorption refrigeration/heat and mass transfer/solution pump/ultrasonic wave/frequency分类
通用工业技术引用本文复制引用
朱茂川,周国兵..超声强化小型溴化锂吸收式制冷机性能实验研究[J].化工进展,2019,38(3):1316-1323,8.基金项目
北京市科技计划(Z151100003515002) （Z151100003515002）
北京市自然科学基金(3152022) （3152022）
