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Estimation of outdoor illuminance for passive solar architecture in Malaysia

机译：马来西亚被动太阳能建筑的户外照度估算

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Illuminance and daylight availability are important parameters in daylighting design for passive, low energy architecture. In Malaysia, the only climatic parameter that can be used for determining daylight availability is global solar irradiation, which is measured at major meteorological stations around the country. However, it is possible to estimate the global illuminance from global solar irradiation data if the global luminous efficacy is known. Several attempts have been made to determine the mean and hourly global luminous efficacy values for the sky at Shah Alam in the Klang Valley, Malaysia, which is about 15 km away from Malaysia's capital city, Kuala Lumpur. Global solar irradiation data is available from this station and global illuminance may be derived from solar irradiation data using global luminous efficacy, K_G Past studies in the determination of K_G involved the measurement of global illuminance using simple outdoor luxmeters and simultaneous data collection of global solar irradiance using a pyranometer. The present study used a sky scanner to measure both parameters simultaneously from the sky dome. The results of the present study were then compared with the results of previous work for the same location. The mean global luminous efficacy was calculated for each set of data using the General Illuminance Model. The monthly average illuminance was then estimated using the obtained K_G while the irradiance data used were from the Model Year Climate (MYC) data. The illuminance was also calculated using the Du Mortier-Perraudeau-Page (DPP) Model recommended for intermediate or average sky types. The results of K_G obtained from the 2 periods of measurements were then compared with that produced by the DPP Model. This paper shows that the sky scanner results are closer to the data produced from the DPP model than those obtained from the separate luxmeter-pyranometer experimental set-up.
机译：照度和日光可用性是被动，低能量架构的灯光设计中的重要参数。在马来西亚，可以用于确定日光可用性的唯一气候参数是全球太阳能照射，该参数在全国各地的主要气象站测量。然而，如果已知全局发光效率，则可以从全局太阳照射数据估计全局照度。已经提出了几次尝试，以确定马来西亚Klang谷的Shah Alam天空的平均值和每小时全球发光疗效值，距离马来西亚首都吉隆坡约有15公里。从该站获得全球太阳能照射数据，并且全局照度可以使用全球发光功效来源于太阳照射数据，K_G过去研究涉及使用简单的户外借调的全球照度的测量和全球太阳能辐照的同步数据收集使用pyranometer。本研究使用了天空扫描仪，从天空圆顶同时测量两个参数。然后将本研究的结果与同一位置的先前工作的结果进行比较。使用普通照度模型对每组数据计算平均全局发光功效。然后使用所获得的K_G估计每月平均照度，而使用的辐照数据来自模型年度气候（MYC）数据。使用推荐用于中间或平均天空类型的Du Martier-Perraudeau-Page（DPP）模型也计算了照度。然后将从DPP模型产生的2个测量期获得的K_G的结果。本文表明，天空扫描仪结果更接近于从DPP模型产生的数据，而不是从单独的豪华豪华师实验设置中获得的数据。

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