دانلود مقاله ISI انگلیسی شماره 64808
عنوان فارسی مقاله

نفوذ لایه برف انباشته در روند انتقال گرما از طریق اسمبلی های بام سبز

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64808 2015 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Accumulated snow layer influence on the heat transfer process through green roof assemblies
منبع

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

Journal : Building and Environment, Volume 87, May 2015, Pages 82–91

کلمات کلیدی
بام سبز ؛ برف؛ انتقال گرما؛ رسانائی برف
پیش نمایش مقاله
پیش نمایش مقاله نفوذ لایه برف انباشته در روند انتقال گرما از طریق اسمبلی های بام سبز

چکیده انگلیسی

A green roof can reduce the peak thermal cooling loads and reduce the building energy consumption during the summer. It is also necessary to understand the thermal performance of these green roof assemblies during the winter when affected by an accumulation of snow on the rooftops. This study presents an experimental investigation and discusses the snow influence on the heat transfer processes through green roof assemblies. The on-site experiments were conducted in the outdoor test facility in Pennsylvania, U.S.A. during the winter of 2010/2011. The experiments were conducted on green roof buildings and on reference buildings for comparison. The collected data included the local meteorology, building operation data, and manually measured snow properties. The measured heat fluxes show that the heat flow though the green roof assemblies compared to the typical roof assemblies were reduced by approximately 23% when there was not an accumulated snow layer. However, this difference in the heat flux was only 5% when the roof structure had an accumulated snow layer. To quantify the snow effects on the heat transfer through green roof assemblies, the Johansen method was then used for snow conductivity calculations on rooftops. These equations should be a part of the total energy balance for the snow covered green roof assemblies because the snow layer significantly altered the heat transfer through these roof assemblies.

خرید مقاله
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