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손성필(Seong Pil Son),김성민(Seong Min Kim),김지성(Ji Sung Kim),왕은석(Eun Seok Wang),박상준(Sang Jun Park),우성민(Sung Min Woo),김인관(In Gwan Kim),김민수(Min Soo Kim),박찬우(Chan Woo Park) 대한설비공학회 2018 설비공학 논문집 Vol.30 No.6
In this study, the basic performance characteristics of a falling film type absorber for use in an absorption chiller were investigated. In order to improve the performance of the absorber, newly-designed heating pipes were tested. End Cross 38, End Cross 40, End Cross 26-2 V, End Dimple, and NF tubes were tested, as well as conventional tubes (Floral tube and End Cross 26 tube). If the falling film absorber is theoretically divided into an upper part that covers the top 35%, a middle part that covers the middle 35% below the upper part, and a lower part that covers the bottom 30%, a high heat transfer and vapor absorption process occurs in the upper region, with successively lower heat transfer and vapor absorption processes in the middle and lower parts. In the case of a low liquid film flow rate of less than 20 liquid film Re, the EC 26 tube has a high overall heat transfer coefficient, and at high liquid film flow rates of 20 to 30 liquid film Re, which are the operating conditions of actual absorption refrigerator commercial equipment, the EC 40 tube has the highest overall heat transfer coefficient. It was also found that the EC 2 V heat transfer tube has a high overall heat transfer coefficient. Finally, it was found that the Floral tube had a generally low heat transfer coefficient.
냉온수 동시 발생 하이브리드 타입 흡수식 냉동/히트펌프 사이클 성능 특성 연구
이승민(Seung Min Lee),홍성주(Sung Joo Hong),김인관(In Gwan Kim),권오경(Oh Kyung Kwon),박찬우(Chan Woo Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
In this research, numerical analysis of hybrid absorption heat pump with capability of simultaneous cold and hot water production was studied. The hybrid heat pump consist of a single-effect absorption chiller and a single-stage heat pump which work all at once, was examinated to produce 95℃ hot water and 7℃ cold water from 100℃ exhausted heat. Therefore, cycle and elements characteristics of system were evaluated specifically for those mentioned analytical condition.