دانلود مقاله ISI انگلیسی شماره 64852
عنوان فارسی مقاله

اثرات گیاه و انتخاب زیر لایه بر عملکرد حرارتی بام های سبز در طول تابستان

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64852 2014 13 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Effects of plant and substrate selection on thermal performance of green roofs during the summer
منبع

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

Journal : Building and Environment, Volume 78, August 2014, Pages 199–211

کلمات کلیدی
عملکرد بام سبز؛ کارخانه و انتخاب زیر لایه؛ مدل بام سبز؛ شار حرارتی؛ تابش خالص
پیش نمایش مقاله
پیش نمایش مقاله اثرات گیاه و انتخاب زیر لایه بر عملکرد حرارتی بام های سبز در طول تابستان

چکیده انگلیسی

Green roof assemblies influence the total roof surface energy balance for a building. The energy balance for a green roof depends mostly on the selection of plants and substrates suitable for the building's location. This study measured thermal properties of common green roof materials and selected two types of plants and substrates to simulate transient thermal performance of different green roof assemblies. The selected plants and substrates have the highest and lowest reflectivity values to establish upper and lower bounds of thermal performance. The simulations use a previously developed green roof model including weather data for four cities representing different climate zones in the U.S. Based on the simulations, substrate heat fluxes and net radiation fluxes are compared for five days in July of the typical meteorological year. The results show that green roof assemblies receive net radiation fluxes that differ by 20%, and peak net radiation fluxes that differ by 16%, due to their different spectral reflectivity values. However, the substrate heat fluxes are similar for different green roof assemblies, as a roof insulation layer diminished this flux. Overall, the material selection of green roof assemblies is more important for buildings located in climate zone 4 or 5 than buildings located in climate zone 2 or 3, where limited water availability for evapotranspiration during hot, dry summers results in little thermal performance variability. Independent of the climate zones, simulation results show that the plant type has an important effect on the net radiation.

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