دانلود مقاله ISI انگلیسی شماره 64847
عنوان فارسی مقاله

عمق برف و نوع پوشش گیاهی بر بازده گرمایی بام سبز در فصل زمستان تاثیر دارد

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64847 2014 9 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Snow depth and vegetation type affect green roof thermal performance in winter
منبع

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

Journal : Energy and Buildings, Volume 84, December 2014, Pages 299–307

کلمات کلیدی
شار حرارتی؛ دمای خاک؛ عایق؛ تابش خورشیدی؛ باد
پیش نمایش مقاله
پیش نمایش مقاله عمق برف و نوع پوشش گیاهی بر بازده گرمایی بام سبز در فصل زمستان تاثیر دارد

چکیده انگلیسی

Green roofs reduce building energy consumption in hot seasons, but cold season thermal performance has received little attention. The goals of this study were to quantify heat flux in an extensive green roof system, relate heat flux to solar radiation, substrate temperature and snow depth, and to determine the relationships between vegetation type, snow accumulation, and substrate temperature. Over the building heating season, we found lower net heat loss from green compared to conventional roofs. Doubling green roof substrate depth had no additional impact in lowering net heat loss. We also quantified substrate temperatures and snow depths from green roofs in different microclimates and vegetation types. Different roof microclimates (sheltered, exposed, over unheated building) resulted in differential snow accumulation; deeper snow resulted in lower variability in heat flux. The benefits of green relative to conventional roofs were lower in extreme winter conditions when the substrate was frozen and/or had snow cover, but also during sunny conditions. Plant species differentially affected depth and duration of snow coverage. Substrate temperatures also differed according to plant growth form during both snow-covered and bare conditions. Net thermal benefits of green roofs in winter will depend on climate, plant choice, roof construction and location.

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