Study on LiBr-Liquid Desiccant System Driven by Heat Pump

Humidity is one of the most important factors for human thermal comfort, and the liquid desiccant system is an effective dehumidification mode, especially for renewable energy such as solar energy or waste heat acting as the driving heat. The whole system performance is depended on high absorption (or desorption) of water vapor in absorption (or desorption) process. Moreover, the cooling and heating energy should apply to absorption and desorption process respectively since the latent heat of water vapor transferred between air and liquid desiccant solution. However, in a real system, cooling and heating energy are always independent and matching imperfectly. In this study, heat pump is applied in a liquid desiccant system as the cooling and heating energy which can use thoroughly. Moreover, lithium bromide is acted as the working solution which is focused on experimentally test. Furthermore, different operating conditions including moist air temperature, air humidity, air flow et al in absorber and in generator are measured in the experiment test. Consequently, the experimental results is given and analyzed.