An experimental investigation of falling-film generation outside vertical tube with lithium chloride aqueous solution was conducted.For the purpose of the development of a high performance of heat and mass transfer utilizing a lithium chloride aqueous solution as the working pair in solar absorption refrigeration system which use the low grade source

an experimental apparatus is set up to study the process of heat and mass transfer in generator using low temperature source.The experiments show that how the operation conditions such as the flow rate of hot water and the solution

the temperature of the heat source

the concentration of the solution and the system pressure influent the generation process.Some contrast experiments at the same condition with lithium bromide are carried on.The variation trend of the vertical falling film generation with lithium chloride aqueous solution is similar with that with lithium bromide aqueous solution.Although the mass rate of falling film generation with lithium chloride aqueous solution is slightly lower than that using lithium bromide aqueous solution

it has little difference in the effect of heat and mass transfer

and it is good for the performance of the system cycle which using the two working pairs becoming higher at the same condition because of the low operation concentration of lithium chloride aqueous solution.