고성능 필름적용을 고려한 이중 창호의 일사량 계산

초록

This paper presents a refined methodology for calculating solar radiation through double-layered window systems, addressing the limitations of conventional approaches outlined in ISO 9050 and EN410. While these standards employ fixed transmittance values for glass layers, leading to inaccuracies in complex fenestration systems with varying films and coatings, the proposed method incorporates directional transmittance. By considering the distinct transmittance values of each glass layer depending on the direction of solar radiation, this method achieves enhanced accuracy. A comprehensive analysis of diverse double layered window configurations with varying film types and positions was conducted. Comparisons between the proposed method and conventional approaches revealed significant discrepancies in solar radiation calculations, particularly in configurations with internal reflective coatings. Furthermore, a notable difference was observed in the calculated radiant heat exchange from the interior to the exterior environment. The enhanced accuracy of the proposed method offers valuable implications for energy-efficient building design and performance evaluation, enabling more precise calcluation of solar heat gain and optimization of window system design.

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