고분자 제습재료의 확산계수 측정에 관한 실험적 연구

Recently, A desiccant cooling system is attracting attention as one of the alternatives to prevent environmental destruction. Adsorption isotherm and diffusivity of desiccant material are major characteristics determining the performance of the desiccant cooling system and desiccant rotor. In this study, we manufacture a novel polymeric desiccant and measure adsorption, characteristics using constant-volume variable-pressure(CVVP) method. The measured adsorption isotherm is greatly influenced by relative humidity rather than temperature. The polymeric desiccant adsorbs water vapor by 40% and 80% of desiccant weight when relative humidity is 40% and 60% respectively. It adsorbs more than nine times than Silica-gel at 20℃. Diffusivity ranged from 7×10￣¹² to 2.5×10￣¹¹ ㎡/s. It shows tendency that the diffusicity increased with relative humidity up to 30% and decreased with higher relative humidity.