암모니아-물 흡수식 냉각기의 동적 해석Dynamic Analysis of an Ammonia-Water Absorption Chiller
- Other Titles
- Dynamic Analysis of an Ammonia-Water Absorption Chiller
- Authors
- 김병주
- Issue Date
- 2004
- Publisher
- 대한설비공학회
- Keywords
- Absorption system; Dynamic analysis; Bulk concentration; Charging ratio; Time constant; 흡수식 시스템; 동적 해석; 체적 농도; 충전비; 시간 상수
- Citation
- 설비공학 논문집, v.16, no.10, pp.990 - 998
- Journal Title
- 설비공학 논문집
- Volume
- 16
- Number
- 10
- Start Page
- 990
- End Page
- 998
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/26220
- ISSN
- 1229-6422
- Abstract
- Dynamic behavior of an ammonia-water absorption system was investigated numerically. Thermal-hydraulic model for a single-effect 3 RT chiller was developed by applying transient conservation equations of total mass, NH3 mass, energy and momentum to each component. Transient variations of system properties and transport variables were analysed during start-up operation. Numerical analyses were performed to quantify the effects of bulk concentration and charging ratio on the system performance in terms of cooling capacity, coefficient of performance, and time constant of system. For an absorption chiller considered in the present study, optimum charging ratio and bulk concentration were to found to exist, which resulted in the maximum cooling capacity and COP. The time constant increased as the charging ratio increased, but decreased with the increase of bulk concentration.
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