สืบค้นงานวิจัย
Assessment and Modeling of Luminous Efficacy of the Daylight in Tropical Climate
Litthanoulok Laspho - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Assessment and Modeling of Luminous Efficacy of the Daylight in Tropical Climate
ผู้แต่ง / หัวหน้าโครงการ (EN): Litthanoulok Laspho
บทคัดย่อ (EN): This thesis aims to study the characteristics of daylight efficacy in a tropical climate. With solar irradiance and daylight illuminance measurements at a station in Thailand, the statistical data of the hourly mean values and the standard deviations of the efficacy of global, diffuse horizontal and beam normal components were derived. This study explores the variations of daylight efficacy with climate conditions as well as the correlations with some insolation parameters of Perez's clearness (varepsilon), brightness index (Delta), and Solar zenith angle (phi s). The Mean Bias Difference (MBD) and Root Mean Square Difference (RMSD) are used for evaluation of prediction performances of the efficacy models proposed by various authors. The results of MBD and RMSD illustrated that no model is suitable for tropical climates. In this study, two models were proposed for global efficacy and diffuse efficacy. The models are capable of determining the efficacy for all sky conditions. As observed from a number of plots of variations of the efficacy with sky conditions, the models chose Perez's clearness (phi s) for the model input. The less effective brightness index (Delta) was excluded from the models. Solar zenith angle (phi s) in radian is also the input of the models. Therefore, this thesis proposes new efficacy models for tropical climates and the models are obtained by fitting the values of the relative luminous efficacy as a function of Perez's clearness (varepsilon) and Solar zenith angle (phi s).
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): http://dcms.thailis.or.th/dcms/dccheck.php?Int_code=54&RecId=13399&obj_id=37870
เผยแพร่โดย (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
คำสำคัญ (EN): Global efficacy
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

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Assessment and Modeling of Luminous Efficacy of the Daylight in Tropical Climate
Litthanoulok Laspho
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
ไม่ระบุวันที่เผยแพร่
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