서지주요정보
내부 순환유동층연소로의 수력학적 특성 및 CWM(coal-water-mixture)의 연소특성 = Hydrodynamics and CWA(coal-water-mixture) combustion characteristics in a circulating fluidized bed with a draft tube
서명 / 저자 내부 순환유동층연소로의 수력학적 특성 및 CWM(coal-water-mixture)의 연소특성 = Hydrodynamics and CWA(coal-water-mixture) combustion characteristics in a circulating fluidized bed with a draft tube / 이운재.
저자명 이운재 ; Lee, Woon-Jae
발행사항 [대전 : 한국과학기술원, 1991].
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소장정보

등록번호

8002249

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9121

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Hydrodynamic properties(solid circulation rate, gas bypassing) in a cold model internal circulating fluidized bed(0.3m I.D. × 0.6m height) with a draft tube(0.1m I.D. × 0.3m height) have been determined. The effect of gas velocities(0.12~1.05m/s) to the draft tube and to the downward moving bed(0.12~0.18m/s), gap height(0.065~0.2m), static bed height(0.365~0.465m) of solids on solids circulation rate and gas bypassing from the draft tube to the moving bed have been determined. The solids circulation rate has been determined by using two thermistors probes. The solids circulation rate increases with increasing gas velocities to the draft tube and to the downward moving bed and consequent increase in pressure drop across the gap opening. When the static bed height of solids is identical to the height of draft tube, a maximum solids circulation rate can be attained. At a constant gas velocity to the annulus, the gas bypassing from the annulus to the draft tube increases with increasing gas velocity to the draft tube and gap height. It has been found that the gas bypassing from the draft tube to the annulus occurs up to the gas velocity to the annulus reaches 0.6 times of minimum fluidizing velocity($U_{mf}$). However, the gas bypassing reverses from the annulus to the draft tube when the gas velocity to annulus reaches above 0.6$U_{mf}$. Combustion characteristics of CWM(coal-water mixture) in an internal circulating fluidized bed combustor as the same dimension of the cold model bed have been determined. The total entrainment rate increase with an increases in gas velocity in the draft tube, but it decrease with an increase in bed temperature. The unburned carbon loss in flyash increases with an increase in gas velocity in the draft tube. The overall combustion efficiency increases with increasing bed temperature, but decrease with increasing gas velocity in the draft tube. The heat transfer coefficient in the annulus(moving bed) increases with increasing gas velocity and bed temperature.

서지기타정보

서지기타정보
청구기호 {MCE 9121
형태사항 viii, 118 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Woon-Jae Lee
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 101-106
주제 Hydrodynamics.
유동층 연소. --과학기술용어시소러스
수력학. --과학기술용어시소러스
Fluidized-bed combustion.
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