热源塔传质特性的分析和实验研究

Mass transfer characteristics in heat-source tower

Through analyzing the characteristics of equipment for cooling/heating, the superiority of a heat pump with heat-source tower for cooling/heating is presented.With different inlet air parameters and inlet solution temperatures, four different modes of mass transfer in the heat-source tower were discussed theoretically and the latent heat percentage, humidity difference of inlet and outlet air streams, and heating capacity with different inlet parameters were studied by experiments.The experimental results showed that as the inlet solution temperature increased from -2℃ to 4℃, the latent heat percentage reduced from 27% to zero.With the increase of the air flow rate and inlet air temperature, the latent heat percentage decreased and the total heat transfer rate increased.As the flow rate of solution increased from 2.9 L·min^-1 to 6.4 L·min^-1, the latent heat percentage was raised from 15% to 28% and the total heat transfer rate was also increased nearly 50%.Experimental data also showed that the latent heat percentage in the heat-source tower was usually less than 30%, which provided a guide for control of solution concentration and regeneration of solution.