A Fundamental Study on the Development of New Energy Performance Index in Office Buildings

Recently, there have been significant concerns regarding excessive energy use in office buildings with a large window-to-wall ratio (WWR) because of the curtain wall structure. However, prior research has confirmed that impact window area on consumption varies depending building size. A newly proposed window-to-floor (WFR) correlates better building. In this paper, we derived correlation by analyzing simulation using EnergyPlus, and results are as follows. case small buildings, study showed WWR requirement increase proportionally, smaller size is, higher sensitivity will be. also was not established for approximately 3600 m2 or larger. Nevertheless, from between WFR requirements, it could be deduced required increased proportionally when 0.1 higher. On other hand, WWR, U-value, solar heat gain coefficient (SHGC), material property values windows had little effect 20%, highest seen at 100%. Further, an SHGC below 0.3, decreased increasing regardless U-value. addition, need in-depth windows’ SHGC, verified through future studies. studies performance, visible light transmittance (VLT), U-value variables, examined.