서지주요정보
LiBr-$H_2O$ 분무식 흡수식 내에서의 열/물질 전달 특성에 관한 실험적 연구 = Experimental study of heat/mass transfer characteristics within a spraying-Type LiBr-$H_2O$ absorber
서명 / 저자 LiBr-$H_2O$ 분무식 흡수식 내에서의 열/물질 전달 특성에 관한 실험적 연구 = Experimental study of heat/mass transfer characteristics within a spraying-Type LiBr-$H_2O$ absorber / 김유동.
저자명 김유동 ; Kim, Yu-Dong
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008572

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 98020

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In the absorber of most absorption refrigeration systems, aqueous solution of LiBr at high concentration is sprinkled on the horizontal tube-bank cooled by cooling water. In this case, heat and mass transfers occur simultaneously. However, to make the systems more compact, a concept of spraying-type absorber can be considered. In this type, the processes of heat and mass transfers can be separated into two steps. That is, the strong solution of LiBr-$H_2O$ is subcooled below the equilibrium condition through a small heat exchanger, and then sprayed into the environment of the refrigerant vapor for absorption. In the present study, a series of the experiments have been performed to examine the heat and mass transfer characteristics of a LiBr-$H_2O$ spray within a spraying-type absorber. Effects of the absorber pressure and the flow rate and the inlet temperature and concentration of the LiBr aqueous solution were investigated. The experimental results show that the absorption performance is improved with the increases of the inlet concentration of LiBr-$H_2O$ and the absorber pressure, and with the decrease of the inlet temperature. Also, the maximum absorption rate is limited by the thermodynamic equilibrium condition. An analysis has been performed based on the simplified drop absorption model and compared with the experimental results. The analytical results underpredict the absorption performance. This implies that the region near the nozzle exit, where the simplified model doesn't apply, has dominant contribution to the absorption performance. At 170d(d : nozzle exit orifice diameter) downstream of the atomizer, the absorption (about 90% of the maximum absorption) is almost completed, and the absorption downstream of this point is rather insignificant.

서지기타정보

서지기타정보
청구기호 {MME 98020
형태사항 ix, 51 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Yu-Dong Kim
지도교수의 한글표기 : 이상용
지도교수의 영문표기 : Sang-Yong Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 수록
주제 리튬브로마이드
흡수기
흡수
분무
LiBr-$H_2O$
Absorber
Absorption
Spray
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