دانلود مقاله ISI انگلیسی شماره 64810
عنوان فارسی مقاله

توسعه و اعتبار مدل حرارت و انتقال همزمان جرم برای بام های سبز

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64810 2012 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Development and validation of a coupled heat and mass transfer model for green roofs ☆
منبع

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

Journal : International Communications in Heat and Mass Transfer, Volume 39, Issue 6, July 2012, Pages 752–761

کلمات کلیدی
بام سبز ؛ انتقال همزمان حرارت و رطوبت، مدل پویا؛ اعتبار تجربی؛ تبخیر و تعرق؛ خنک کننده غیر فعال
پیش نمایش مقاله
پیش نمایش مقاله توسعه و اعتبار مدل حرارت و انتقال همزمان جرم برای بام های سبز

چکیده انگلیسی

This paper describes a dynamic model of transient heat and mass transfer across a green roof component. The thermal behavior of the green roof layers is modeled and coupled to the water balance in the substrate that is determined accounting for evapotranspiration. The water balance variations over time directly impact the physical properties of the substrate and the evapotranspiration intensity. This thermal and hydric model incorporates wind speed effects within the foliage through a new calculation of the resistance to heat and mass transfer within the leaf canopy. The developed model is validated with experimental data from a one-tenth-scale green roof located at the University of La Rochelle. A comparison between the numerical and the experimental results demonstrates the accuracy of the model for predicting the substrate temperature and water content variations. The heat and mass transfer mechanisms through green roofs are analyzed and explained using the modeled energy balances, and parametric studies of green roof behavior are presented. A surface temperature difference of up to 25 °C was found among green roofs with a dry growing medium or a saturated growing medium. Furthermore, the thermal inertia effects, which are usually simplified or neglected, are taken into account and shown to affect the temperature and flux results. This study highlights the importance of a coupled evapotranspiration process model for the accurate assessment of the passive cooling effect of green roofs.

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