دانلود مقاله ISI انگلیسی شماره 66665
عنوان فارسی مقاله

تجزیه و تحلیل اشعه جذب شده توسط سقف های گنبدی شکل و طاقی در مقایسه با سقف های مسطح

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
66665 2003 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
An analysis of absorbed radiation by domed and vaulted roofs as compared with flat roofs
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Energy and Buildings, Volume 35, Issue 6, July 2003, Pages 539–548

کلمات کلیدی
وابستگی زاویه جذب؛ جذب تابش؛ نیم گنبد و زاویه طاق
پیش نمایش مقاله
پیش نمایش مقاله تجزیه و تحلیل اشعه جذب شده توسط سقف های گنبدی شکل و طاقی در مقایسه با سقف های مسطح

چکیده انگلیسی

Domed or vaulted roofs have been extensively used in buildings throughout the Middle East and other hot arid regions. Many studies have focused on climate-related considerations, but very little quantitative research exists in the literature. In this study, an attempt was made to calculate the insolation absorbed by these roofs, as compared with flat roofs, based on angular dependence of absorptance and solar geometry. Results showed that a domed or vaulted roof will absorb more solar radiation than its corresponding flat roof. The ratios Kb, Ktot increase with the increase of the half dome or vault angle but are insignificantly affected by climate characteristics and latitude of the location. It was also seen that a south–north facing vaulted roof both reduces the solar heat gain of buildings in summer months and increases solar heat gain in winter months compared to one which faces east–west; the greater the proportion of area exposed to the sun is, the smaller the amount of beam radiation that will be absorbed by a curved roof. Furthermore, results showed that even if absorptance is assumed to be constant this would affect total solar heat gain of the roofs studied by less than 4%.

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