دانلود مقاله ISI انگلیسی شماره 66666
عنوان فارسی مقاله

کارایی خنک کننده استراتژی های چشم انداز شهری در آب و هوای گرم و خشک

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
66666 2009 8 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
The cooling efficiency of urban landscape strategies in a hot dry climate
منبع

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

Journal : Landscape and Urban Planning, Volume 92, Issues 3–4, 30 September 2009, Pages 179–186

کلمات کلیدی
محیط زیست شهری؛ خنک کننده؛ راندمان مصرف آب؛ مناطق گرم خشک؛ سایه
پیش نمایش مقاله
پیش نمایش مقاله کارایی خنک کننده استراتژی های چشم انداز شهری در آب و هوای گرم و خشک

چکیده انگلیسی

This paper describes a climatic analysis of landscape strategies for outdoor cooling in a hot-arid region, considering the efficiency of water use. Six landscape strategies were studied, using different combinations of trees, lawn, and an overhead shade mesh. The effects of these treatments were tested during the summer season in two semi-enclosed courtyards located at an urban settlement in the arid Negev Highlands of southern Israel. Compared to a non-vegetated exposed courtyard, which on average reached a maximum air temperature of 34 °C in mid-afternoon, a similar courtyard treated with shade trees and grass yielded a daytime temperature depression of up to 2.5 K, while shading the courtyard with a fabric shading mesh, counter-intuitively, caused a relative increase of nearly 1 K. Unshaded grass was found to cause only a small air temperature depression and had the highest water requirement. However when the grass was shaded, either by the trees or by the shade mesh, a synergic effect produced greater cooling as well as a reduction of more than 50% in total water use. The “cooling efficiency” of these strategies was calculated as the ratio between the sensible heat removed from the space and the latent heat of evaporation, with the latter representing the amount of water required for landscape irrigation. This measure is proposed as a criterion for evaluating landscape strategies in arid regions, where water resources are scarce.

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