溶液调湿空调系统浓度差的变化规律研究

从理论上分析了溶液分支流量对溶液平衡浓度差的影响,给出了溶液平衡浓度差的理论计算模型。模拟计算结果表明:随着溶液分支流量的增大,浓溶液和稀溶液之间的平衡浓度差减小;在相同的溶液分支流量下,Li Cl溶液的平衡浓度差比Li Br溶液略大;系统冷负荷和热负荷增加量均随溶液分支流量的增大而增大,但随板式换热器进出口溶液温差的增大而减小;与Li Br溶液相比,Li Cl溶液循环过程受溶液分支流量的影响相对较大。

Research on Solution Concentration Difference of Liquid Desiccant Systems

The effect of the solution branch flow on solution equilibrium concentration difference based on the theoretical analysis was proposed,and the calculation model of solution equilibrium concentration difference was presented. The simulation results illustrated that with the increasing of the equilibrium concentration of solution branch flow,solution concentration difference between strong solution and weak solution decreases; and that in the same solution branch flow rate,the equilibrium concentration of Li Cl solution was slightly larger than Li Br solution; and the cooling capacity and heating capacity of the heat pump system increased while the solution branch flow rate increased,and decreased with the decrease of inlet-and-outlet solution temperature of the plate heat exchanger; and that compared with Li Br solution,Li Cl solution circulation was more likely affected by solution branch flow rate.