스팬드럴용 투광형 결정계 BIPV창호의 후면단열 조건에 따른 연간 온도 및 발전성능 분석 연구
Annual Base Performance Evaluation on Cell Temperature and Power Generation of c-Si Transparent Spandrel BIPV Module depending on the Backside Insulation Level
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Recently, finishing materials at spandrel area, a part of curtain-wall system, are gradually forced to improve thermal insulation performance in order to enhance the building energy efficiency. Also, Building Integrated Photovoltaics(BIPV)systems have been installed in the exterior side of the spandrel area, which is generally composed of windows. Those BIPVs aim to achieve high building energy efficiency and supply the electricity to building. However, if transparent BIPV module is combined with high insulated spandrel, it would reduce the PV efficiency for two major reasons. First, temperature in the air space, located between window layer and finishing layer of the spandrel area, can significantly increase by solar heat gain, because the space has a few air density relative to other spaces in building. Secondly, PV has a characteristics of decreased Voltage(Voc and Vmp) with the increased temperature on the PV cell. For these reasons, this research analyzed a direct interrelation between PV Cell temperature and electricity generation performance under different insulation conditions in the spandrel area. The different insulation conditions under consideration are 1) high insulated spandrel(HIS)2) low insulated spandrel(LIS) 3) PV stand alone on the ground(SAG). As a result, in case of 1) HIS, PV temperature was increased and thus electricity generation efficiency was decreased more than other cases. To be specific, each cases’maximum temperature indicated that 1) HIS is 88.8℃, 2) LIS is 74.2℃, and 3) SAG is 66.3℃. Also, each cases yield electricity generation like that 1) HIS is 913.3kWh/kWp, 2) LIS is 942.8kWh/kWp, and 3) SAG is 981.3kWh/kWp. These result showed that it is needed for us to seek to the way how the PV Cell temperature would be decreased.
Abstract
Recently, finishing materials at spandrel area, a part of curtain-wall system, are gradually forced to improve thermal insulation performance in order to enhance the building energy efficiency. Also, Building Integrated Photovoltaics(BIPV)systems have been installed in the exterior side of the spandrel area, which is generally composed of windows. Those BIPVs aim to achieve high building energy efficiency and supply the electricity to building. However, if transparent BIPV module is combined with high insulated spandrel, it would reduce the PV efficiency for two major reasons. First, temperature in the air space, located between window layer and finishing layer of the spandrel area, can significantly increase by solar heat gain, because the space has a few air density relative to other spaces in building. Secondly, PV has a characteristics of decreased Voltage(Voc and Vmp) with the increased temperature on the PV cell. For these reasons, this research analyzed a direct interrelation between PV Cell temperature and electricity generation performance under different insulation conditions in the spandrel area. The different insulation conditions under consideration are 1) high insulated spandrel(HIS)2) low insulated spandrel(LIS) 3) PV stand alone on the ground(SAG). As a result, in case of 1) HIS, PV temperature was increased and thus electricity generation efficiency was decreased more than other cases. To be specific, each cases’maximum temperature indicated that 1) HIS is 88.8℃, 2) LIS is 74.2℃, and 3) SAG is 66.3℃. Also, each cases yield electricity generation like that 1) HIS is 913.3kWh/kWp, 2) LIS is 942.8kWh/kWp, and 3) SAG is 981.3kWh/kWp. These result showed that it is needed for us to seek to the way how the PV Cell temperature would be decreased.
참고문헌 (8)
- 국토해양부, "건축물의 설비기준 등에 관한 규칙", ~ (2011)
- Jong-ho Yoon, "A Study on the Glazing Surface Temperature and Thermal Shock of BIPV Window Applied to the Spandrel Area of Curtain Wall System in Office Building" (2012), Architectural Institute of Korea
- Jurij Kurnik, "Outdoor testing of PV module temperature and performance under different mounting and operational condition" (2011), Solar Energy Materials and Solar Cell
- Dong-Su Kim, "The Evaluation of the Temperature Characteristics at the Spendrels of Curtain wall with a-Si BIPV Window System", Korean Solar Energy Society, Conference (2012)
- M. Mattei, "Calculation of the polycrystalline PV module temperature using a simple method of energy balance" (2006), Renewable Energy
- Kyung-Eun, Park, "Generation characteristics of BIPV module as spandrel glass according to temperature variation", Korean Institute of Architectural Sustainable Environment and Building Systems, Conference (2007)
- "Energy Plus Engineering Reference, LBNL, Oct.2010", ~ (2010)