Abstract
Due to the significant impact of indoor humidity on Indoor Air Quality, human comfort and energy consumption, many researchers have investigated the use of various hygroscopic materials to moderate indoor humidity levels and save energy. The results show that the indoor relative humidity of the room with hygroscopic materials is more stable and moderate. Although many laboratory measurements and numerical simulation studies have been done for hygroscopic materials, there is little study on moisture exchange between materials with limited thickness and indoor air. The EMPD model is widely used due to its fast solution time and reasonable accuracy. However, it is not suitable when the hygroscopic material is thin and limited. In this paper, a double effective moisture penetration depth (DEMPD) model is described and developed. An application analysis of the proposed DEMPD model is presented. The results show that the DEMPD model can well simulate the moisture exchange between hygroscopic material with limited thickness and indoor air while the traditional EMPD model shows a great deviation.
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