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흡수식 냉동기 열회수용 판형 열교환기 성능 특성에 관한 연구
김병련(Byeong-ryeon Kim),김재인(Jae-in Kim),이승민(Seung-min Lee),김태훈(Tea-hoon kim),박찬우(Chan-woo Park) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
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.
어병세균 Edwardsiella tarda에 대한 한약재 추출물의 항균활성
김아라 ( Ah Ra Kim ),김도균 ( Do Kyun Kim ),변태환 ( Tea Hwan Byun ),조은지 ( Eun Jee Jo ),이은우 ( Eun Woo Lee ),권현주 ( Hyun Ju Kwon ),김병우 ( Byung Woo Kim ),김태훈 ( Tae Hoon Kim ),이경본 ( Kyung Bon Lee ),김영만 ( Young Man 한국식품저장유통학회(구 한국농산물저장유통학회) 2011 한국식품저장유통학회지 Vol.18 No.1
The methanol extracts of 19 commercial herb medicines was analyzed to antibacterial activities against Edwardsiella tarda, causing several fish diseases. Rhus javanica showed most strong antibacterial activity against E. tarda and Escherichia coli. Methanol extract of R. javanica was further extracted using several organic solvents having different polarity. Extract from ethyl acetate fraction showed strong activity against E. tarda as well as E. coli. Minimal inhibitory concentration, MIC of R. javanica extract was measured and resulted showing 64 ㎍/㎖ for E. tarda and 256 ㎍/㎖ for E. coli. It is needed that, from these results, further purification and isolation of reposible compound of these activities and further study on the synergy effect using combination with antibiotics against pathogenic bacteria.