Conventional air conditioning systems based on the vapor compression principle are primary electricity consumers and their refrigerants have negative environmental impacts. The combined liquid desiccant dehumidification and vapor compression system are defined as hybrid liquid desiccant systems. Desiccant dehumidification is the technology for dehumidifying of the air by absorbing the moisture from it. When the moisture absorbs, the air is dehumidified and became most suitable for cooling purpose in humid and hot climates. For this reason, the liquid desiccant dehumidification technology is proposed as an alternative to the traditional vapour compression systems due to its advantage in, removing the air latent load, friendly environment, removing of pollutants from the process air and reduction the electrical energy consumption.