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냉매 열교환기 구성방법에 따른 제 2종 흡수식 히트펌프의 성능 특성 변화에 관한 연구
이창현(Chang Hyun Lee),윤준성(Jun Seong Yoon),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 설비공학 논문집 Vol.29 No.7
The objective of this study was to determine the effect of refrigerant heat exchanger on the performance of type II absorption heat pump performance using numerical analysis. Two heat exchange installation methods were used: solution to refrigerant and waste hot water to refrigerant. These methods were compared to the standard model of hot water flow without using refrigerant heat exchanger. When waste hot waters were bypassed to refrigerant heat exchanger, COP was not affected. However, steam mass generation rates were increased compared to those of the standard model. When solutions were bypassed to the refrigerant heat exchanger, results were different depending on the place where the solution rejoined. COP and steam mass generation rates were lower compared to those when waste heat water was passed to refrigerant heat exchanger. Thus, it is possible to obtain higher steam mass generation rates by using waste water and installing refrigerant heat exchanger.
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.
흡수식 냉동기용 판형 냉매 드레인 열교환기 성능 특성에 관한 연구
김병련(Byeong-ryeon Kim),이창현(Jun-seong Yoon),박찬우(Chan-woo Park) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
The performance of a plate heat exchanger for using liquid solution the absorption chiller was analyzed. The objectives of this paper are to measure the heat transfer and pressure drop of the plate heat exchanger for absorption system applications. Three types of plate heat exchangers with different chevron angles are tested in the present experiment. The working fluid is H2O/LiBr solution with the LiBr concentration range of 55% in mass. The results show that the overall heat transfer coefficient increases linearly with increasing Re. This work is a basic study of a cycle in which LiB aqueous solution, which has been diluted through the absorption of water vapor in the absorber of an absorption chiller, is made concentrated before reaching the regenerator.