화학공학소재연구정보센터
Journal of the Korean Industrial and Engineering Chemistry, Vol.11, No.7, 780-784, November, 2000
PSA Heat Pump 용 흡착제 성능의 비교
Comparisons of Adsorbents for the Use of PSA Heat Pump
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초록
Pressure Swing Adsorption (PSA) Heat pump에서 좋은 열효율을 얻기 위해서는 좋은 열특성을 가지는 흡착제의 사용이 필요하다. 흡착제로 실리카겔, 활성 알루미나, 제올라이트 13X, 제올라이트 4A를 선택하고 탄산가스를 피흡착제로 하여 흡착식 히트펌프를 시험하였다. 온도분리의 효율을 높이기 위하여 흡착제에는 LiBr 그리고 피흡착제에는 수분을 가하였다. 흡착 사이클의 결과로 나타나는 것은 흡착제중 실리카겔이 열 전달 속도가 가장 컸다. 입자의 크기를 60-80과 25-35 mesh 사이에서 변화시키며 실험한 결과 온도분리모양에는 큰 변화를 주지 못했다. 흡착제에 LiBr의 함침은 온도분리와 흡착열량을 증가시켰다. LiBr 함침량, 3%에서 최대 온도분리를 나타내었다.
Heat pump by Pressure Swing Adsorption(PSA) needs adsorbents having good thermal properties for a high efficiency of heating and cooling cycle. As the adsorbents, silica gel, alumina, zeolite-4A and zeolite-13X were selected, and using carbon dioxide as an adsorbate the adsorption-heat-pump was examined. LiBr was impregnated on silica gel and alumina, and water vapor was also added to the adsorbate to increase the efficiency of temperature splitting. The adsorption and desorption cycle indicates that the heat transfer rate was the highest when the silica gel was used as the adsorbent among others. The particle size of the adsorbent, ranging from 25-35 mesh to 60-80 mesh, did not affect the shape of temperature cycle. Impregnation of LiBr on the adsorbent increased the temperature splitting and the amount of heat. Maximum splitting was observed at 3 wt% of LiBr.
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