Abstract:

Solar liquid collector/regenerator combines solar photothermic transformation and liquid regeneration，effectively achieving liquid regeneration for solar energy-driven liquid desiccant cooling systems.In this paper a group of dimensionless heat and mass transfer equations describing the heat and mass transfer processes in the solar liquid C/R can be obtained by defining total temperature difference（ΔT₀）and dimensionless heat loss coefficient and validated by comparing with the related experimental data.Through the analysis of effect of inlet parameters of air and solution on the regeneration performance，it was found that when the air inlet temperature rose by 12℃ and humidity ratio decreased by 12 g•kg^-1，the increment of outlet concentration of solution increased by above 30% and 70% respectively and when the solution inlet temperature rose by 30℃，the increment of outlet concentration of solution raise increased by above 160%.From the effect of four kinds of variable groups，the increase of number of heat transfer units（NTU），flow rate ratio，total temperature difference ΔT₀ and Lewis factor Le could promote the regeneration of solution.Compared to the parallel-current regeneration，the increment of solution concentration in the counter-current regeneration case could increase by about 10%.