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이상재(S.J.Lee),김대훈(D.H.Kim),이민규(M.K.Lee),권영철(Y.C.Kweon),장근선(K.S.Chang),윤준원(J.W.Yun),정지환(J.H.Jeong) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
The purpose of this study is to investigate me characteristics of the air-side heat transfer and pressure drop on the fin pattern of six types of φ 9.52 nun finned-tube heat exchangers. An air-enthalpy Calorimeter is used in this experiment. Experiments are carried out by changing velocity (from 0.7 m/s to 1.5 m/s). From results, we can see that the air-side heat transfer coefficients and the pressure drop depend upon the geometry of the heat exchanger. With increasing the inlet air velocity, the heat transfer and the pressure drop increase linearly and exponentially, respectively. At the same heat transfer area, the heat transfers in the low velocities are nearly the same and those in 1.5 m/s have the maximum 3% difference. The pressure drops have the different trend for the fin patterns.
ABA 처리가 ‘파라다이스’ 포도의 착색과 과실품질에 미치는 영향
이민규 ( Lee,M. G. ),허재윤 ( J. Y. Heo ),박성민 ( S. M. Park ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2019 강원 농업생명환경연구 Vol.31 No.2
‘Paradise’, a triploid grape cultivar, needs application of gibberellin acid in order to induce seedless fruit with large size, which can result in poor berry coloration under unsuitable growth conditions. Global warming leading to warm climates can be one of major reasons to prohibit production of ‘Paradise’ with high quality. Abscisic acid (ABA) is a well-known plant hormone that is related to the maturation of grape berries, and its application can be useful to avoid the problem of poor berry coloration. Hence, this study was conducted to investigate the effect of ABA application on fruit coloration and characteristics in ‘Paradise’ grape cultivar. ABA-treated berries were characterized by superior coloration compared to control berries. In addition, treatment with high concentration of ABA led to better fruit characteristics which result from early maturation. Therefore, ABA application seems to be an effective method for enhancing the fruit color and quality of ‘Paradise’ grape cultivar.