유하액막식 암모니아 흡수기에서 증기 유동방향에 따른 열 및 물질전달 특성Heat and Mass Transfer Characteristics of a Falling Film Ammonia Absorber with Respect to the Vapor Flow Direction
- Other Titles
- Heat and Mass Transfer Characteristics of a Falling Film Ammonia Absorber with Respect to the Vapor Flow Direction
- Authors
- 권경민; 정시영; 김병주; 정은수
- Issue Date
- 2004
- Publisher
- 대한설비공학회
- Keywords
- Heat and mass transfer(열 및 물질전달); Ammonia absorber(암모니아 흡수기); Parallel flow(평행류); Counter-current flow(대향류); Falling film(유하액막); Heat and mass transfer(열 및 물질전달); Ammonia absorber(암모니아 흡수기); Parallel flow(평행류); Counter-current flow(대향류); Falling film(유하액막)
- Citation
- 설비공학 논문집, v.16, no.1, pp.16 - 25
- Journal Title
- 설비공학 논문집
- Volume
- 16
- Number
- 1
- Start Page
- 16
- End Page
- 25
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/26449
- ISSN
- 1229-6422
- Abstract
- The flow and heat/mass transfer in the falling-film of a heat exchanger can be influenced by the motion of the surrounding refrigerant vapor. In this study, the effect of the vapor flow direction on the absorption heat transfer has been investigated for a falling-film helical coil which is frequently used as the absorber of ammonia/water absorption refrigerators. The experiments were carried out for different solution concentration. The heat and mass transfer performance was measured for both parallel and counter-current flow. The effect of vapor flow on the heat and mass transfer is found to be increased with decreasing solution concentration. In the experiments with low solution concentration, whose vapor specific volume is great, the counter-current flow of vapor resulted in uneven distribution of falling- film and reduced the heat transfer performance of the absorber. The direction of the vapor flow hardly affected the thermal performance as the solution concentration became stronger since the specific volume of the ammonia/water vapor was much smaller than that of the water vapor.
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Collections - College of Engineering > Department of Mechanical and System Design Engineering > 1. Journal Articles
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