화학공학소재연구정보센터
Renewable Energy, Vol.107, 629-638, 2017
Effects of built environment morphology on wind turbine noise exposure at building facades
With wind farms installed in urban and suburban areas, the noise exposure of buildings is affected both by distance attenuation and the morphology of the built environment. With the aim of exploring the noise-resisting effects of built environment morphology, three kinds of typical suburban areas in the UK were sampled and noise maps were generated based upon an idealised modern wind turbine placed at various setback distances from each site. Relationships between morphological indices and building facade exposures were examined through regression analyses. Noise reduction levels of five morphological indices were given in terms of resisting wind turbine noise with different source-receiver (S-R) distances, and at different frequencies. The results show that built environment morphology has considerable effects on resisting the noise exposure of buildings and can create a quiet facade with up to 13 dBA difference to the most exposure facade. Among the five indices, building orientation is found to be most effective in resisting the noise exposure of building facades, followed by the length and shape of the building. The noise resistance effects vary by different S-R distantes and differ by frequency. Four morphological indices are found to be effective in resisting noise at low frequencies, typically at 50 Hz. (C) 2017 Elsevier Ltd. All rights reserved.