A Basic Study on the Development of PV Module Applying Building Envelope Technology for Energy Reduction
AUTHORS
Heangwoo Lee,Major of Space Design, College of Design, Sangmyung University, Cheonan, Korea
ABSTRACT
Recently, energy consumption in the building sector continues to rise, and many studies are being conducted to address this problem. In particular, building envelopes are the largest sources of heat loss in buildings, so the demand for related studies is increasing to improve its performance. Building envelopes are composed of element technologies related to insulation, daylighting, shading, and concentrating light. However, each technology has pros and cons, making it unsuitable for saving building energy. Therefore, the purpose of this study is to build basic data for building envelopes by proposing and validating the performance of a building envelope that can simultaneously concentrate light and perform daylighting. For this purpose, this study validated the effectiveness of saving building energy through a full-scale testbed. The main findings are as follows. 1) This study integrated a curved light shelf (daylighting system) with a PV module (to concentrate light) and proposed attaching the PV module to the bottom of the light shelf to solve issues that reduce PV generation efficiency. 2) The optimal angle of a flat light shelf for saving lighting energy during summers was 30° and based on this, the amount of lighting energy used to satisfy the optimal indoor illumination (400 lx) was 0.144 kWh. 3) The optimal angle of the curved light shelf with a PV module proposed in this study is 30° and based on this, 0.129 kWh of lighting energy was used to satisfy the optimal indoor illumination of 400 lx. The curved light shelf with a PV module can also produce energy through the PV module, so it can save building energy by 16.6% compared to a conventional flat light shelf considering the energy produced by the PV module.
KEYWORDS
Building envelope, Photovoltaic, Performance evaluation, Energy saving
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