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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.
제2종 LiBr-H2O 흡수식 히트펌프의 운전 변수에 따른 성능 수치 해석
윤준성(Jun Seong Yoon),권오경(Kwon Oh Kyung),차동안(Cha Dong An),배경진(Bae Kyung Jin),김인관(In Gwan Kim),김민수(Min Soo Kim),박찬우(Chan Woo Park) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
In this study, Engineering Equation Solver(EES) program was used to predict the performance of an Absorption Heat Transformer(AHT). AHTs have potential in the use of low-level heat sources such as industrial waste heat. low-level heat sources can be raised to high-level heat sources through the cycle of the ATHs. The Performance modelling of a double-effect AHT in this study uses LiBr-H2O as the working solution. The concentration of this working solution ranges from 58.2% to 62.2%. The components of the AHT include absorber, generator, condenser, evaporator and solution heat exchanger. The temperature of the cooling water is 25℃ and the temperature of the water used as the low-level heat source is 90℃. This low-level heat source can be transformed to steam at 120℃ in the Absorber. To find efficient condition, compare with another type’s AHT.
중대형급 냉수, 스팀 동시 공급형 흡수식 히트펌프 시제품 성능시험 결과 분석
하현호(Hyun Ho Ha),김한길(Han Gil Kim),풍익(Feng Yi),조대한(Dea Han Cho),유인평(In Pyung Yoo),권오경(Oh Kyung Kwon),배경진(Kyung Jin Bae),김남용(Nam Yong Kim),홍성주(Sung Joo Hong),박찬우(Chan Woo Park),김인관(In Gwan Kim) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
The combination of Absorption Heat Pump Type II and Single Effect Absorption Chiller is the Absorption Heat Transformer with simultaneous supply of chilled water and steam. This type of absorption heat transformer can supply steam of 120℃ and chilled water of 8℃ simultaneously by using hot water of 90℃ as heat source. A heat source of the cycle of this absorption heat transformer passes through generator and high temperature generator. The consist formation of the cycle are evaporator to produce chilled water, high temperature absorber to produce high temperature water, low temperature absorber and condenser for heat dissipation; in addition, the control system is structured exclusively for steam and chilled water. A prototype is designed based on ability of supplying 100 usRT of cooling capacity and 200kg/h of steam, and manufactured to execute performance evaluation accordingly.
제 2종 흡수식 히트펌프의 냉매열교환기 적용에 따른 특성 변화에 관한 연구
이창현(Chang Hyun Lee),윤준성(Jun Seong Yoon),이광표(Gwang Pyo Lee),서양(Yang Seo),김인관(In Gwan Kim),권오경(Oh Kyung Kwon),차동안(Dong An Cha),배경진(Kyung Jin Bae),김민수(Min Su Kim),박찬우(Chan Woo Park) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
This study was carried out a numerical analysis the effects of how to configure refrigerant heat exchanger on the performance of type II absorption heat pump. There are two kinds of heat exchange methods, solution to refrigerant and waste hot water to refrigerant. When the waste hot water is bypassed to the refrigerant heat exchanger, steam mass rates ars increased compared to the standard model. When the solution was bypassed to the refrigerant heat exchanger, steam mass rates are lower than in the case where the waste heat water was used in the refrigerant heat exchanger. Thus, in constructing the refrigerant heat exchanger, it is possible to obtain a higher Steam mass value by using waste water than by using a solution.
냉수, 스팀 동시 발생용 하이브리드 흡수식 히트 펌프의 수치적 해석
이창현(Chang Hyun Lee),홍성주(Sung Joo Hong),김병련(Byung Ryun Kim),김재인(Jae In Kim),이승민(Seong Min Lee),김인관(In Gwan Kim),권오경(Oh Kyung Kwon),박찬우(Chan Woo Park) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This study was carried out a numerical analysis the hybrid absorption heat pump that simultaneously produces cold water and steam. The hybrid absorption heat pump is a combination of a single-effect absorption chiller and a single-stage absorption heat pump. The heat pump uses 90℃ waste heat from the industry to produce 120℃ steam that can be used in the process and produces 7℃ cooling water at the same time. In this study, numerical simulations were carried out for characteristics of each element and cycle characteristics for each variable under conditions of producing 120 steam and 7 cold water.
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.
플로랄 형상의 구리관 고온흡수기의 열전달 성능 특성에 관한 실험적 연구
김정재(Jeong Jae Kim),배경진(Kyung Jin Bae),김인관(In Gwan Kim),김용찬(Yong Chan Kim),권오경(Oh Kyung Kwon) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6
The objective of this study is to investigate the heat transfer performance characteristics of a high temperature absorber with regard to the solution concentration. An experimental apparatus consists of a generator, a condenser, an evaporator, and the high-temperature absorber. The high temperature absorber is a falling film type with a small pressure drop, and floral copper tubes are employed. The experimental data was measured for about 30 minutes at steady state. The solution concentration was selected within the range of ±2 wt% based on 61 wt%, which has less crystallization risk and a stable heat transfer performance. When the solution concentration increase from 61 to 63 wt%, the heat transfer rate of the high temperature absorber increased by 22% and overall heat transfer coefficient decreased by 10%.