서지주요정보
내부 순환유동층 연소로에서 석탄연소 및 열전달 특성 = Coal combustion and heat transfer characteristics in an internal circulating fluidized bed combustor
서명 / 저자 내부 순환유동층 연소로에서 석탄연소 및 열전달 특성 = Coal combustion and heat transfer characteristics in an internal circulating fluidized bed combustor / 박승식.
저자명 박승식 ; Park, Seung-Sik
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000887

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9006

SMS전송

도서상태

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초록정보

The effects of gas velocity (0.038~0.15 m/s), excess air ratio (1.0~1.3) and bed temperature in the fluidized bed (700~900°C) on the total entrainment rate, combustion efficiency and heat transfer coefficient in the combustor have been determined. The solids circulation rate has been determined by particle velocity of heated particles which is measured by the time-lag of signals from two thermistor probes vertically located in the bed. The solids circulation rate increases linearly with increasing gas velocity in the fluidized bed and pressure drop across an orifice opening. The total entrainment rate increases with an increase in gas velocity in the fluidized bed, but it decreases with an increase in bed temperature. The unburned carbon loss in flyash decreases with an increase in bed temperature, but it increases with an increase in gas velocity in the fluidized bed. The combustion efficiency increases with increasing bed temperature, excess air ratio and solids circulation rate. The heat transfer coefficient in the fluidized bed combustor increases with an increase in gas velocity, through a maximum value, thereafter, it decreases with increasing gas velocity. The heat transfer coefficient in fluidized bed increases with increasing bed temperature. The heat transfer coefficients in the present study have been correlated in terms of the relevant dimensionless parameters as: $Nu_t=\frac{h_oD_t}{k_g}=259.1(1-\epsilon)(Re_s/Ar_s)^{0.33}\Bigg[\frac{\rho _sC_{ps}D_t^{3/2}g^{1/2}}{k_g}\Bigg]^{0.06}Pr^{0.30}$ $Nu_p=\frac{h_od_p}{k_g}=1.108Re^{-0.36}Re_w^{0.34}[(Re_s/Ar_s)^{0.59}+0.6944Fr_w^{0.89}]Pr^{0.28}$ $Nu_p=\frac{h_od_p}{k_g}=0.648Re^{0.33}Re_m^{-0.91}Re_w^{-0.10}$

서지기타정보

서지기타정보
청구기호 {MCE 9006
형태사항 vii, 125 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Seung-Sik Park
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 93-99
주제 Heat --Transmission.
유동상 소각. --과학기술용어시소러스
열 전달. --과학기술용어시소러스
Fluidized bed combustion.
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