کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
264776 504113 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling natural convection in a pitched thermosyphon system in building roofs and experimental validation using particle image velocimetry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Modeling natural convection in a pitched thermosyphon system in building roofs and experimental validation using particle image velocimetry
چکیده انگلیسی

Attics in Europe are more and more used as a living room. In tropical regions, summer comfort in attics becomes critical when the roof system is badly designed. The European standards advise to form an open thermosyphon system into the roof under the tiles for many purposes. In order to evaluate the air channel's efficiency, an experimental study using a 2D-PIV system was carried out. A numerical model representing the natural convection within the thermosyphon was also developed. The predicted velocity distributions and the induced mass flow rate were in good agreement with the experimental results. Correlations for the air flow rate and heat transfer coefficients were proposed. The impact of the inclination, height, opening sections and Rayleigh number on the channel's efficiency was also investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 42, Issue 8, August 2010, Pages 1267–1274
نویسندگان
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