間接照明之照明效率研究

Lighting Utilization Effect Of Indirect Lighting Patterns

林菲華(FEI-HUA LIN)

指導教授 ： 張謙允

中原大學/設計學院/室內設計研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500467

摘要

摘 要

「間接照明」受限於燈具種類、配光方式、建材反射率、投光距離及角度，裝修結構型式等，導致照明率降低損耗率升高。間接照明常用在洗牆照明，其洗牆效果與理想遮光線位置何在？本研究做了二個實驗來驗證。實驗﹙壹﹚：以天花板與層板之間接照明形式，用螢光燈的直接與間接照明方式進行實驗。另選用〈Dialux〉照明軟體，以相對相同條件模擬。實驗（貳）：設一木作燈罩以二種不同高度，燈具分置三個位置，螢光燈下照實驗洗牆效果。
實驗結果發現：實驗﹙壹﹚實體空間：（一）三種間接照明形式的照明損失，至少40%，大者接近68%。（二）牆面之A水平測點位置，都有最大的照度、輝度值。（三）任一層板懸垂高度，牆面上方的中央數值最大。（四）長向牆面層板下方，照度及輝度都較短向牆面低。（五）照度變化與層板位置有顯著的相關性，其最小平方值顯示有80%～85%的預測力。實驗﹙壹﹚（Dialux）模擬空間：以照度來看〈Dialux〉模擬與實測比較，照明損失率以下降40公分最大達4.15個百分點。下降50及60公分平均，差異1.5個百分點與實測接近，照度的近似度相當高。
實驗（貳）：實體空間（一）最大照度在燈具中心延伸線上，右側比左側照度大。（二）A 燈位置有遮光罩時；牆面處，遮光罩高度變化照度變化不明顯。地面處，遮光罩高度大則照度變小。（三）B燈位置有遮光罩時，牆面與地面照度變化呈正比規律變化。（四）距離燈具中心愈近則照度愈大，愈遠則照度愈小。（五）距離燈具最近檢測點，與次近檢測點照度落差最大，差異達五倍至八倍。

關鍵字

照度 ； 輝度 ； 間接照明 ； 照明率

並列摘要

ABSTRACT

Confined by specific design variables, including light source, power distribution pattern, reflectance ratio of interior surfaces, light distribution pattern, and spatial formation, “indirect lighting patterns” that are widely employed in “wall-wash” lighting design, inevitably produces such drawbacks as the lost of utilization effect. Even though, it is essential for designers to contemplate relevant design issues. Specifically, they include cove dimension with regard to room size, choice of luminaire for evenly distributed luminance on wall-wash design, and the degree to which indirect lighting pattern lost its utilization effect.
These contemplations are verified through three sets of experimental processes. First, comparative lost of utilization effect is tested through three varying cove heights for indirect lighting and direct lighting. Second, comparative luminance distribution of a wall-wash design is conducted to ping point fluorescent luminaire position on a cove. Third, a lighting design simulation software, Dialux, is employed to calculate similar lighting variables. These experiments are all carried out in a rectangular dark room for accurate light measurements. With the aid of light meter and luminance meter, it is found that light utilization effect loss is rather conspicuous, ranging from 40%to 68%. The central portions of all walls in the room reveal highest luminance and illumination values regardless of cove height variations. In the case of a rectangular room, shorter walls obtain higher values of luminance and illumination than that of longer walls. Little discrepancy is found in further comparison between the values obtained in the dark room and that of simulation. As for the test of wall-wash lighting design, the positions of three fluorescent tubes cause dramatic change of light distribution. It is found, generally, that the closer a fluorescent tube is positioned to the wall, the better even distribution of luminance may occur.

並列關鍵字

Indirect lighting ； Lighting utilization ； Luminance ； Illumination

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