Experimental analysis of the performance of lithium bromide liquid desiccant in air dehumidification process with experimental design

Nowadays, we can reduce the latent load of the system with using desiccant as an absorbent in air conditioning and cooling systems. In this research the operation of lithium bromide liquid desiccant in air dehumidification process is investigated with using experimental design of a central composite design of response surface methodology. The effect of four input factors including air inlet humidity and temperature, desiccant concentration and mass flow rate ratio of desiccant solution to the air as a response is investigated. The air and desiccant outlet temperature and dehumidification mass rate is expressed as a function of input parameters with a reduced quadratic equation and the model has shown good agreement with experimental data. The optimum conditions showed that using a desiccant solution with concentration of 50%, mass flow rate ratio of 2.4, air inlet temperature of 28.8(oC)and air inlet humidity of 0.0190 (kgw/kgda) maximize the dehumidification mass rate and minimize the air and desiccant outlet temperature.