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Received May 25, 2017
Accepted July 14, 2017
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기체 유동층에서 입자 비산속도 상관식에 의한 수송속도의 예측
Predicting the Transport Velocity by the Correlation on Particle Entrainment Rate in the Gas Fluidized-bed
건국대학교 화학공학과, 05029 서울특별시 광진구 능동로 120 1COMSATS Institute of Information Technology 화학공학과, 54000 Defence Road, Lahore, Pakistan 2한국에너지기술연구원, 34129 대전광역시 유성구 가정로 152
Department of Chemical Engineering, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029, Korea 1Department of Chemical Engineering, COMSATS Institute of Information Technology, Defence Road, Lahore 54000, Pakistan 2Korea Institute of Energy Research, 152, Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea
choijhoo@konkuk.ac.kr
Korean Chemical Engineering Research, October 2017, 55(5), 638-645(8), 10.9713/kcer.2017.55.5.638 Epub 19 October 2017
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Abstract
기체 유동층에서 입자비산속도에 관한 상관식을 사용하여 입자의 수송속도를 예측하는 모델을 제안하였다. Choi 등과 Li와 Kato의 상관식을 사용하여 emptying time 방법을 모사하였다. 기체속도의 단위에 의한 영향을 배제하기 위해서, 기체속도를 종말속도로 나눈 무차원 속도를 x-축의 값으로 사용하였다. y-축은 입자비산속도의 역수를 사용하였다. 기체속도를 증가시킬 때, y-값의 감소 기울기가 절대값으로 0.398 [m2s/kg]를 나타내는 무차원 속도를 수송속도로 간주 하였다. 모델의 예측값은 고온, 고압에서도 측정값과 비교적 잘 일치하였다.
A model for predicting the transport velocity was proposed using the correlation of the particle entrainment rate in the gas fluidized bed. The emptying time method was simulated using correlations of Choi et al. and Li and Kato. In order to exclude the influence of the unit of the gas velocity, the dimensionless velocity obtained by dividing the gas velocity by the terminal velocity was used as the value of the x-axis. The inverse of the particle entrainment rate was used as the value of the y-axis. When increasing the gas velocity, the non-dimensional velocity, at which the decreasing slope of the y-value is 0.398 [m2s/kg] in absolute value, was considered as the transport velocity. The transport velocity predicted by the model was in good agreement even at high temperature and high pressure.
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Li JL, Kato K, Powder Technol., 118(3), 209 (2001)
