کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4919605 1428960 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of diurnal variation in wind velocity profiles on ventilation performance estimates
ترجمه فارسی عنوان
تأثیر تنوع روزانه در پروفیل های باد در برآورد عملکرد تهویه
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
We conducted observations of wind velocity profiles above a high-density area in Tokyo, Japan, using a Doppler LIDAR system. The observation data of an exponent index for the power law, which is commonly used to describe the wind velocity profile, displayed diurnal variation, decreasing in the daytime. Building simulations considering diurnal variation of the exponent index are not often performed, and most cases use a constant value. This paper provides information on the error in the calculated ventilation airflow rate due to the use of a constant value for the exponent index, on the premise that a variation of an exponent index obtained from observation is the true value. The error in the calculated ventilation airflow rate was quantified based on comparison of the ventilation airflow rate calculated using a constant value of 0.22, and the ventilation airflow rate calculated considering a diurnal change in the exponent index. The results indicate that the ventilation airflow rate obtained from a constant value for the exponent index for an isolated building with two openings is underestimated by up to 8% in the daytime and overestimated by up to 14% in the nighttime.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 130, 15 October 2016, Pages 397-407
نویسندگان
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