Development of annual calculation method of lighting energy saving effect by daylight utilization using various shading devices

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420593
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Architectural environment/Equipment
• Research Institution: National Institute for Land and Infrastructure Management (2016); Building Research Institute (2014-2015)
• Principal Investigator: Miki Yasuhiro 国土技術政策総合研究所, 住宅研究部, 室長 (90356014)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 昼光利用 / 照明エネルギー / 日照調整装置 / 年間計算法 / 空間の明るさ / 窓面のグレア

Outline of Final Research Achievements

As energy saving measures for lighting, daylight utilization is expected to be highly effective, so it is required to be able to evaluate its effect appropriately. However, in the current calculation of annual daylight utilization effect, quality of indoor visual environment is insufficiently satisfied since glare from the window and spatial brightness by daylight utilization are not considered. Therefore, in this research, to development of annual calculation method of lighting energy saving effect which satisfied the quality of indoor visual environment of the daylight utilization using various shading devices, the subjective experiment with scale models and luminance analysis from annual daylight simulations were carried out. As a result, we showed the possibility of average luminance evaluation as index of spatial brightness, the possibility of existing index DGP as glare evaluation, and the calculation method for reduction effect of lighting consumption using them.

Free Research Field

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