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스페이서의 재질변화에 따른 전열교환기 성능변화에 관한 연구
임태건(Tae-Kun Lim),전병헌(Byung-Heon Jeon),안영철(Young-Chull Ahn) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
The importance of ventilation system is being emphasized by interest of indoor air quality. Especially, heat recovery ventilation system has attracted attention as most effective ventilation plan. Because it can reduce hazardous construction materials, indoor air pollutions, and also can reduce air conditioning energy cost. In heat recovery ventilator, the element core is the most important part. The element core is composed of liner and spacer. And liner and spacer are stacked alternately. On the Liner, heat and humidity transfer are made between supply and exhaust air. And spacer plays a role as a tunnel of exhaust and supply. In this study, We investigated and analyzed the efficiency of a heat recovery ventilator, when the spacer’s properties are changed. As a result, Difference spacer’s properties affect an efficiency of heat recovery ventilator.
전열교환기 급, 배기 풍량비에 따른 열 교환 효율의 실험적 분석
임태건(Lim Tae-Kun),전병헌(Jeon Syung-Heon),안영철(Ahn Young-Chull) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.3
The importance of ventilation system is being emphasized by interest of indoor air quality. Especially, heat recovery ventilation system has attracted attention as most effective ventilation plan. Because it can reduce hazardous construction materials, indoor air pollutions, and also can reduce air conditioning energy. A heat recovery ventilation system has a supply fan and an exhaust fan, and the air flow rates can be controlled individually. In this study, heat transfer characteristics of the system, when the air flow rates are controlled, have been investigated and analyzed. The optimum air flow ratio between supply and return flows is 1:1 and the total heat transfer reaches maximum at that point.
자궁경부 상피내종양의 치료로서 환상투열요법 시행 후 잔류병변의 예측인자
임태건(Tai Gun Im),황호명(Ho Myong Hwang),정영주(Young Ju Jeong),오병찬(Byung Chan Oh) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.8
N/A Objective : The purpose of this study was to determine whether unexplained elevation of second- trimester maternal serum beta-human chorionic gonadotropin (β-hCG) is associated with adverse pregnancy outcomes. Method : Between January 1998 and December 1999, we evaluated 2112 pregnant women undergoing second trimester triple marker screening test who delivered at our hospital. Inclusion criteria were singleton pregnancy, confirmed gestational age, and hCG level greater than 2.0 MoM. The exclusion criteria were fetal anomaly, abnormal karyotype, MSAFP level greater than 2.0 MoM, uE3 level less than 0.4 MoM, and referred patients with pregnancy-induced hypertension (PIH). A group of randomly selected women with normal maternal serum hCG and AFP levels served as control. Results : Women with unexplained elevation of hCG level showed increased risks for PIH (p<0.001) and preterm delivery (p<0.003). There were no significant diffrences between study and control groups with respect to placental abruption, fetal distress, PROM, intrauterine fetal death, and apgar score. Conclusion ; Pregnancies with unexplained elevation of hCG levels should be regarded as high-risk pregnancies and managed accordingly. The combination with these biomarkers such as VEGF, plasminogen activating factor I and AT-III as a screening test for PIH may be useful.
스페이서의 재질변화에 따른 전열교환기 성능변화에 관한 연구
임태건(Tae-Kun Lim),전병헌(Byung-Heon Jeon),김종원(Jong-Won Kim),정성학(Sung-Hak Jung),이승갑(Seung-Kap Lee),안영철(Young-Chull Ahn) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.3
The importance of ventilation system is being emphasized by interest of indoor air quality. Especially, heat recovery ventilation system has attracted attention as most effective ventilation plan. Because it can reduce hazardous construction materials, indoor air pollutions, and also can reduce air conditioning energy cost. In heat recovery ventilator, the element core is the most important part. The element core is composed of liner and spacer. And liner and spacer are stacked alternately. On the Liner, heat and humidity transfer are made between supply and exhaust air. And spacer plays a role as a tunnel of exhaust and supply. In this study, we investigated and analyzed the efficiency of a heat recovery ventilator, when the spacer’s properties are changed. As a result, difference spacer’s properties affect an efficiency of heat recovery ventilator.