摘要
本文搭建了两级气泡泵与溴化锂制冷系统耦合特性实验台,进行了实验研究,实验中用气泡泵代替了传统的溶液泵,以进一步提高能源的利用率。实验结果表明：1）装置运行初期,因气泡泵本身的间歇性以及气泡泵流型转换的影响,系统参数,如一次冷剂蒸汽和稀溶液流量等参数,表现出不稳定性。随着装置继续运行,当气泡泵中的流型为环状流时,系统参数趋于稳定。2）在稀溶液浓度为53%时,1740 W的加热功率对系统性能系数（COP）影响最大,超过1740 W后,增加加热功率的影响不再显著。3）在无热交换器的情况下,加热功率为1740 W,稀溶液浓度为53%,管径为9.5mm,冷凝器温度为38-42℃,蒸发器温度为15-18℃时,系统的制冷系数为0.62-0.68。
An experimental rig of coupling characteristic of double-stage bubble pump with Lithium Bromide（LiBr） refrigeration system was set up,and experiments were carried out.In the experiment,bubble pump was used instead of traditional solution pump to improve the utilization ration of energy.Experimental results reveal that：1） At the beginning of experimental system operation,the parameters of the system,such as first-stage refrigerant vapor flow and weak solution flow,show non-steadiness due to the intermittent and flow pattern conversion in bubble pump.As the operation goes on,the parameters of the system become stable when the flow pattern of the bubble pump is annular flow.2） The influence of heat input of 1740 W on the system coefficient of performance（COP） is more significant when the LiBr solution concentration is 53%.The influence of increasing heat input on COP becomes less dominant when heat input is above 1740 W.3） The COP of the refrigeration system ranges from 0.62 to 0.68 in the case of no solution heat exchanger,heat input 1740 W,weak solution concentration 53%,pipe diameter 9.5 mm,condensation temperature range of 38°C to 42℃,and evaporation temperature range of 15℃ to 18℃.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2016年第5期935-940,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50976015)
辽宁省科学技术计划项目(No.2010224002)
交通运输部海事局科技项目(No.2012_27)
中央高校基本科研业务费专项资金资助(No.3132014338)
关键词
两级气泡泵
溴化锂吸收式制冷
耦合特性
实验研究
double-stage bubble pump
lithium bromide absorption refrigeration
coupling characteristics
experimental investigation
