دانلود مقاله ISI انگلیسی شماره 64857
عنوان فارسی مقاله

مدل سازی فرایند انتشار گرما در لایه های غیر جاندار بام های سبز

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64857 2011 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Modeling the heat diffusion process in the abiotic layers of green roofs
منبع

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

Journal : Energy and Buildings, Volume 43, Issue 6, June 2011, Pages 1341–1350

کلمات کلیدی
بام سبز ؛ عملکرد حرارتی؛ سرمایش تبخیری؛ انتشار حرارتی؛ محیط متخلخل مرطوب؛ لایه های غیرجاندار؛ مدل نظری
پیش نمایش مقاله
پیش نمایش مقاله مدل سازی فرایند انتشار گرما در لایه های غیر جاندار بام های سبز

چکیده انگلیسی

Green roofs have been increasingly installed to alleviate some common environmental problems. The thermal benefit of living vegetation on rooftop has been extensively studied. The individual and joint contribution of the non-living green roof layers, namely soil, rockwool (water storage) and plastic drainage layers, to thermal performance of green roof has seldom been assessed. This study evaluates the insulating and cooling effects of these abiotic materials. A one-dimensional theoretical model was developed to assess the heat diffusion process in the layers. The model was validated with empirical results from three experimental plots. A calibration procedure was successfully applied to determine key model parameters. The model can capture the most critical features of temperature variations and thermal performance of common abiotic green roof materials. The appreciable water-retention capacity of rockwool plays the dual role of supplying water to the soil to enhance evaporative cooling, and increasing the specific heat capacity of the green roof. The plastic drainage sheet with ample air spaces serves as an excellent thermal insulator. The model remains robust despite seasonal and weather variabilities. Our research findings contradict with some researches in the temperate region that the thermal dissipation in green roofs with dense vegetation is lower than thermally insulated bare roofs. The theoretical model could be used to simulate the micro-environmental conditions and predict the thermal performance of different materials to improve green roof design.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.