摘要
依据双膜理论假设,建立了规整填料绝热吸收器数学模型,通过对连续性方程和动量方程简化得出速度关系式,从而保证程序计算结果收敛和减少计算时间,依据计算结果分析了喷淋溶液温度、浓度、流量和吸收压力对传质系数影响,并将计算结果和实验结果进行比较.结果表明,增加喷淋溶液流量能显著增大溴化锂溶液绝热吸收过程传质系数;数值计算结果和实验结果吻合较好.
A mathematical model of the adiabatic absorber with structured packings was developed. The continuity and momentum equation was simplified in order to make the solution converge and to save computation time. Based on the prediction results, the influences of solution flow rate, solution temperature, solution concentration, and vapor pressure on the coefficient of mass transfer were analyzed. The results have revealed that the available method to enhance the mass transfer in the adiabatic absorption of water vapor into lithium bromide aqueous solutions is to increase the flow rate of spray solution. The prediction results are in good agreement with our experiment results.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第7期16-20,共5页
Journal of Hunan University:Natural Sciences
基金
国家十一五科技支撑计划重点项目(2006BAJ04B04)
关键词
吸收制冷
传热
传质
规整填料
数学模型
absorption refrigeration
heat transfer
mass transfer
structured packing
mathematical model
