دانلود مقاله ISI انگلیسی شماره 66664
عنوان فارسی مقاله

مطالعات تجربی در یک پیکربندی حوض سقف جدید برای خنک کننده ساختمان ها

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
66664 2003 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Experimental studies on a novel roof pond configuration for the cooling of buildings
منبع

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

Journal : Renewable Energy, Volume 28, Issue 10, August 2003, Pages 1513–1522

کلمات کلیدی
حوض سقف؛ سرمایش تبخیری؛ لایه بندی حرارتی
پیش نمایش مقاله
پیش نمایش مقاله مطالعات تجربی در یک پیکربندی حوض سقف جدید برای خنک کننده ساختمان ها

چکیده انگلیسی

A new evaporation based passive cooling technology was tested. The technology is based on the exposure of “floating” wetted cloth to the ambient air. It was compared to various other passive cooling techniques, with very favorable results. Two identical shallow ponds were constructed. One of them was covered with white cotton towels stretched on a densely perforated PVC panel supported by pieces of waterproof polystyrene keeping it just floating on the water surface. Five comparable experiments of different cooling techniques have been carried out. The results indicate that the new cooling technique performed slightly better than the pond with movable insulation, which is widely considered as one of the best roof cooling techniques based on evaporation. It seems that the higher efficiency of the tested technique is due to the thermal stratification created in the water inside the pond, which more effectively resists the transfer of heat gains from the sun and ambient air into the deep water of the pond. In turn, the water temperature near the floor of the pond is lower, thus heat flow from the building to the pond is increased. During the experiment, all the ponds which were compared were ranked according to performance (from best to worse): shaded pond with towels floated on it, pond with towels floated on it and pond with movable insulation, shaded open pond, open pond, covered pond.

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