逆流热源塔传热传质模型建立与凝水调节的可行性  

Modeling of heat and mass transfer in counterflow heat-source tower and feasibility study of moisture condensation control

作　　者：刘成兴[1] 梁彩华[1] 文先太[1] 张小松[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2013年第4期788-792,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51106023);"十二五"国家科技支撑计划资助项目(2011BAJ03B14);江苏省自然科学基金重点资助项目(BK2010029)

摘　　要：为探讨通过调节运行参数对热源塔内凝水量进行控制的可行性,在建立逆流热源塔内溶液与空气间热质传递数学模型并对其验证的基础上,深入研究了以乙二醇水溶液为工作介质热源塔的入塔空气湿度和入塔溶液温度对塔内凝水量的影响规律.结果表明:当热源塔入塔空气含湿量从4.9 g/kg减小至2.2 g/kg时,塔内凝水量从1.98 g/s减小至-0.40 g/s;当入塔溶液温度从-5℃升高到-1℃时,塔内凝水量由0.56 g/s减小至-0.07 g/s.通过降低入塔空气湿度或者提高入塔溶液温度,可减少热源塔内凝水量,甚至实现溶液浓度再生,从而为减少系统溶液再生需求,高效解决热源塔热泵的溶液再生问题提供了新思路.To study the feasibility of moisture condensation control in heat-source tower by operating parameter regulation,a mathematic model of heat and mass transfer betw een air and solution in the counterflow heat-source tow er w as developed and validated.The effect of the humidity ratio of inlet air and the solution inlet temperature on moisture condensation in the heat-source tow er w as investigated by using ethylene glycol aqueous solution as w ork fluid.The results show that the rate of moisture condensation decreases from 1.98 g/s to-0.40 g/s as the humidity ratio of inlet air decreases from 4.9 g/kg to 2.2 g/kg.The rate of moisture condensation decreases from 0.56 g/s to-0.07 g/s w ith a rise in the solution inlet temperature from-5 ℃ to-1 ℃.The rate of moisture condensation in the heat-source tow er decreases w ith the decrease of the humidity ratio of inlet air and the increase of the solution inlet temperature.And solution’s reconcentration can even be realized by heat-source tow er itself.It is a new w ay to reduce the system demand of solution reconcentration and solve the solution reconcentration problem efficiently.

关 键 词：热源塔 传质 乙二醇 凝水控制 

分 类 号：TK121[动力工程及工程热物理—工程热物理]