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박준언(Park Jun-Eon),김익상(Kim Iksang),박선호(Park Seon-Ho) 한국영어교과교육학회 2008 영어교과교육 Vol.7 No.1
In this paper, the authors explain the theoretical underpinnings of immersion foreign language education and propose several instructional models in Korean EFL classroom contexts. We propose five instructional models that can be utilized in schools depending upon the availability of competent teachers, the degree of collaboration between Korean teachers and native-speaker English teachers.
UTC Solarwall 건축물 통합시스템 년간 에너지 성능평가 Simulation 기술에 관한 연구
박준언(Jun-Un Park),이의준(Eye-Joon Lee),정모(Mo Chung) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
UTC(Unglazed Transpired Collector) Solarwall Solar Air Heating(SAHS) systems have unique advantages for space heating and tempering ventilation air over the conventional collector system such as flat plate collector and vacuum collector. SAHS can improve radiation loss due to nonglazed component and convectional loss due to enhanced plate surface configuration. Heating energy and its equivalent green house emission performance can be improved from the use of this solar air heating system. A consistent method to estimate annual EPI(Energy Performance Index), energy savings per unit area, has been required to be implemented in many IPMVP(International Performance Measurement Verification Protocol) and ESCO(Energy Service Company)project. This study is to develop a simulation and verification method to estimate the annual energy savings in future ESCO solar wall project.
후면 환기형 BIPV 시스템의 레이놀즈수에 따른 전력 및 열성능 특성에 관한 해석적 연구
박준언(Jun Un Park),서항석(Hang Suk Suh),이성주(Sung Joo Lee),최윤식(Yun Shic Choi) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.7
The purpose of this study was to analyze the electrical and thermal characteristics of the various types of ventilating BIPV systems. Compared with the conventional top and down block off type, the top and down open BIPV system using natural stack effect and mechanical ventilating type has potential to improve the conventional block off type BIPV systems’ in-site various problems like PV cell high temperature. These kinds of conventional block off BIPV have low efficiency power production and shut-off at the junction box for high humidity ratio environment condition. Hence, it is critical to compare the PV cell temperature, efficiency, and power production between the mechanical ventilating type BIPV and the conventional block off and natural ventilating type BIPV system. For this purpose, the IPMVP OPTION D analytical program TRNSYS and the type 567 model based on the Sandia model were used and the PV cell temperature, PV electricity efficiency, and BIPV system useful energy rate were estimated with different Reynolds number cases, such as the natural ventilation and the forced mechanical ventilation flow. As for results, first at the BIPV electrical point of view, the Reynolds number increasing led to lower PV cell temperature, higher PV efficiency, and higher PV power production. Especially, the maximum BIPV cell temperature occurred at 12 am on October 3. At that time, at each case-1 (Reynolds number 0) and case-9 (Reynolds number 30,304), the respective PV cell temperature value showed 67.6℃ and 36.3℃, respectively, and the corresponding PV efficiency indicated 8.0% and 12.3%, respectively. The individual PV production power value marks were 59.5 kW and 91.9 kW. Second, at the PV thermal view point, increasing Reynolds number induces more annually BIPV building heating useful energy. Particularly at each case-1 (Reynolds number 0) and case-9 (Reynolds number 30,304), the respective BIPV building heating useful energy showed 0 kWh/yr and 7,514 kWh/yr.
변동식 열적증기재압축장치TVR 시스템의 에너지절감 평가 사례에 관한 연구
박준언(Joonun Park),김광호(Kwangho Kim),서항석(Hang Suk Suh) 대한설비공학회 2015 대한설비공학회 학술발표대회논문집 Vol.2015 No.11
TVR system is thermal vapor recompression system, which saves steam energy by thermal recompression mechanism. TVR use waste steam from high temperature condensing water or low-pressure steam from industrial process. In this study basic concept, practical design and expected effects of variable TVR system is introduced. For this study a corrugated paper production company is selected for applying variable TVR system in paper drying process using steam heat. In this study energy saving ratio of variable TVR system is estimated as 11.3% which is good enough in economical point of view.