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.