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겨울철 난방에너지 절감을 위한 이중외피형 태양열 집열시스템 설계 조건별 성능 분석
방수연,윤나리,허연숙 대한설비공학회 2023 설비공학 논문집 Vol.35 No.5
Double-skin facade (DSF) consists of two or more layers between which air flows. DSF can be used as a passive system by harnessing natural ventilation and preheating effect for heating, cooling, and ventilation. It can also be used with an active system either by simply alternating the passive mode with the existing active systems. Based on the capability of a DSF in providing preheated air by solar heat gains, this paper proposes a DSF-inspired solar heating system (hereinafter, the double-skin solar heating system) for integration into a building’s active system. This system warms up the air inside the DSF cavity and delivers the preheated air into an air-handling unit (AHU). We examined the architectural and material parameters of the system and analyzed the energy performance to quantify the benefit of such a system. For parametric analysis, a case study of a medium-sized office building was set up where the double-skin solar heating system was installed, and the geometry and thermal properties of the system were investigated. The parametric analysis demonstrated that the width of the double-skin solar heating system is the most influencing factor.
일개 상급종합병원 응급중환자실 내 심정지 후 저체온요법을 적용한 환자의 말초 청색증 발생 현황
방수연,이영희,Bang, Soo Youn,Yi, Young Hee 한국중환자간호학회 2021 중환자간호학회지 Vol.14 No.3
Purpose : This study aimed to identify the incidence of peripheral cyanosis and the characteristics and clinical results of patients with therapeutic hypothermia after a cardiac arrest. Methods : Data were collected from April to June 2021 via the electrical medical records of 95 patients with therapeutic hypothermia for 72 hours after a cardiac arrest admitted to an acute care unit at a tertiary hospital between January 1, 2016, and December 31, 2019. The data were analyzed using descriptive statistics and a t-test, Mann-Whitney U test, Chi-squared test, Fisher's exact test, and logistic regression using SPSS/WIN. Results : The incidence of peripheral cyanosis was 20%. In the peripheral cyanosis group, peripheral vascular disease, fibrinogen, vasopressor, infection, disseminated intravascular coagulation, acute physiology, chronic health evaluation II score on the second hospital day, nursing intervention, and mortality on the seventh hospital day were higher. The level of fibrinogen and use of vasopressors affected the occurrence of peripheral cyanosis. Conclusion : Considering the influencing variables, careful observation is necessary for patients with high fibrinogen levels and vasopressor use. These results provide basic data to recognize the need for nursing intervention for peripheral cyanosis and encourage nurses to deliver them during therapeutic hypothermia.
방수연,김진현 한국생물공학회 2017 Biotechnology and Bioprocess Engineering Vol.22 No.5
The adsorption of 10-deacetylpaclitaxel onto Sylopute was investigated at different initial 10-DAP concentrations, adsorption temperatures, and durations. The Freundlich isotherm model showed good fit to the equilibrium adsorption data. It was found that adsorption capacity increases with increasing temperature and that the adsorption of 10-DAP onto Sylopute is favorable and physical in nature. The obtained kinetic data agree well with the pseudo-second-order model, and the adsorption reaches equilibrium very quickly within 1 min. Thermodynamic parameters revealed the endothermic, irreversible and nonspontaneous nature of adsorption. The isosteric heat of adsorption changes very little as the adsorption capacity increases.
방수연(Suyeon Bang),윤나리(Nari Yoon),허연숙(Yeonsook Heo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study proposes the double-skin solar air heating system to supply the fresh outdoor air to the air-handling unit through the double-skin facade cavity after preheating it with use of solar radiation. Parametric analysis of the double-skin solar air heating system geometry and thermal properties is performed through a case study of a medium office building. The parametric analysis evaluates the preheating effect of the width of the system in relation to the building width and thermal properties of glazing and absorber materials and corresponding energy-saving outputs.
방수연(Suyeon Bang),윤나리(Nari Yoon),허연숙(Yeonsook Heo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study proposes the double-skin solar air heating system to supply the fresh outdoor air to the air-handling unit through the double-skin facade cavity after preheating it with use of solar radiation. Parametric analysis of the double-skin solar air heating system geometry and thermal properties is performed through a case study of a medium office building. The parametric analysis evaluates the preheating effect of the width of the system in relation to the building width and thermal properties of glazing and absorber materials and corresponding energy-saving outputs.