کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2843134 1166074 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Correlations in thermal comfort and natural wind
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Correlations in thermal comfort and natural wind
چکیده انگلیسی


• This paper investigates the characteristics of natural wind.
• The dynamic characteristics of natural wind were analyzed using the Fast Fourier Transform analysis.
• The analysis results were averaged using the power spectrum exponent (β-value) and the results have been correlated with human thermal sensation.

Many field surveys have shown that naturally ventilated buildings are favorable to human thermal comfort and may allow higher cooling temperatures than air-conditioned buildings. Recreating natural wind characteristics with a mechanical cooling system may diminish the drawbacks of conventional cooling systems such as drafts and high energy demands.Natural wind characteristics (wind velocity, direction, turbulent intensity, temperature and relative humidity) were recorded in a mountain environment and correlated with the human thermal sensation of 48 subjects. Natural wind fluctuation characteristics were analyzed using the Fast Fourier Transform (FFT) analysis. The dynamic characteristics of natural wind were averaged through the power spectrum exponent (β−value), which represents the energy distribution of the turbulent flow of natural wind. The power spectrum exponent (β−value) of the natural wind will decrease when the mean velocity increases, while it will increase when the turbulent intensity increases. The power spectrum exponent (β−value) was correlated (Spearman's rank coefficient=0.56, p<0.001) with thermal comfort. The power spectrum exponent (β-value) for people feeling comfortable has a median value of 1.62 [1.41–1.80 for the first and third quartiles, respectively] and the β−value for people feeling uncomfortable has a median value of 1.10 [0.97–1.25].

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Thermal Biology - Volume 38, Issue 7, October 2013, Pages 419–426
نویسندگان
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