Renewable energy sources,especially wind power,were believed to be able to slow down global warming;however,evidence in recent years shows that wind farms may also induce climate change.With the rapid development of w...Renewable energy sources,especially wind power,were believed to be able to slow down global warming;however,evidence in recent years shows that wind farms may also induce climate change.With the rapid development of wind power industry,the number of wind farms installed in mountains has gradually increased.Therefore,it is necessary to study the impact of wind farms in mountainous areas on local climate.The Suizhou and Dawu wind farms in northern Hubei Province were chosen for the present study on the impact of wind farm operations on the local climate in mountainous areas.The mesoscale meteorological numerical model Weather Research and Forecasting Model(WRF)and the Fitch model,together with turbulence correction factor,were used to simulate wind farm operations and study their effects on local climate.The results showed the characteristics of wind speed attenuation in mountainous wind farms:the amplitude and range of wind speed attenuation were stronger in the nighttime than in the daytime,and stronger in summer than in winter.The surface temperature increased and became more significant in summer.However,a cooling variation was observed above the surface warming center.The height of this center was higher in the daytime than it was in the nighttime.The latent heat flux in the wind farms decreased at night,accompanied by an increase in sensible heat flux.However,these changes were not significant.Some differences were observed between the impact of wind farms on the climate in the plains and the mountains.Such differences are more likely to be related to complex terrain conditions,climate conditions,and the density of wind turbines.The present study may provide support for the development and construction of wind farms in mountainous areas.展开更多
随着风力发电的快速发展,集中式风电场建设运行对气候环境产生的影响受到了广泛的关注。为了研究局地气候对不同下垫面条件下风电场运行的响应特征,以青海湖西南部的乌兰茶卡至共和沙珠玉乡为中心,使用中尺度气象数值模式WRF(Weather Re...随着风力发电的快速发展,集中式风电场建设运行对气候环境产生的影响受到了广泛的关注。为了研究局地气候对不同下垫面条件下风电场运行的响应特征,以青海湖西南部的乌兰茶卡至共和沙珠玉乡为中心,使用中尺度气象数值模式WRF(Weather Research and Forecasting Model)及Fitch风机模型分别在平坦峡谷、高海拔山地和水体下垫面条件下,开展风电场运行的气候效应敏感性数值试验,结果表明:在同等装机的理想情景下,3种下垫面风电场内近地层平均风速均呈现减弱特征,且夜间风速衰减的幅度及范围强于白天,垂直方向上的风速衰减可达600 m;平坦峡谷和水体下垫面风电场内2 m气温以降低为主,可能与该区域负的温度梯度及水体表面蒸发增强有关,且夜间降温更显著,而高海拔地区的气温变化较弱;风电场内2 m湿度变化不明显,总体以弱降低为主,其中水体风电场内夜间湿度减小更明显;同时,风机扰动运行使得边界层高度显著增加。可见,不同下垫面条件下风电场运行的气候响应特征不同,这主要与不同下垫面条件下的差异化气候背景有关,也受风机空间排布特征的影响。研究成果可为气候友好型风电场布局规划提供一定支撑。展开更多
基金National Key R&D Program of China(2018YFB1502801)。
文摘Renewable energy sources,especially wind power,were believed to be able to slow down global warming;however,evidence in recent years shows that wind farms may also induce climate change.With the rapid development of wind power industry,the number of wind farms installed in mountains has gradually increased.Therefore,it is necessary to study the impact of wind farms in mountainous areas on local climate.The Suizhou and Dawu wind farms in northern Hubei Province were chosen for the present study on the impact of wind farm operations on the local climate in mountainous areas.The mesoscale meteorological numerical model Weather Research and Forecasting Model(WRF)and the Fitch model,together with turbulence correction factor,were used to simulate wind farm operations and study their effects on local climate.The results showed the characteristics of wind speed attenuation in mountainous wind farms:the amplitude and range of wind speed attenuation were stronger in the nighttime than in the daytime,and stronger in summer than in winter.The surface temperature increased and became more significant in summer.However,a cooling variation was observed above the surface warming center.The height of this center was higher in the daytime than it was in the nighttime.The latent heat flux in the wind farms decreased at night,accompanied by an increase in sensible heat flux.However,these changes were not significant.Some differences were observed between the impact of wind farms on the climate in the plains and the mountains.Such differences are more likely to be related to complex terrain conditions,climate conditions,and the density of wind turbines.The present study may provide support for the development and construction of wind farms in mountainous areas.
文摘随着风力发电的快速发展,集中式风电场建设运行对气候环境产生的影响受到了广泛的关注。为了研究局地气候对不同下垫面条件下风电场运行的响应特征,以青海湖西南部的乌兰茶卡至共和沙珠玉乡为中心,使用中尺度气象数值模式WRF(Weather Research and Forecasting Model)及Fitch风机模型分别在平坦峡谷、高海拔山地和水体下垫面条件下,开展风电场运行的气候效应敏感性数值试验,结果表明:在同等装机的理想情景下,3种下垫面风电场内近地层平均风速均呈现减弱特征,且夜间风速衰减的幅度及范围强于白天,垂直方向上的风速衰减可达600 m;平坦峡谷和水体下垫面风电场内2 m气温以降低为主,可能与该区域负的温度梯度及水体表面蒸发增强有关,且夜间降温更显著,而高海拔地区的气温变化较弱;风电场内2 m湿度变化不明显,总体以弱降低为主,其中水体风电场内夜间湿度减小更明显;同时,风机扰动运行使得边界层高度显著增加。可见,不同下垫面条件下风电场运行的气候响应特征不同,这主要与不同下垫面条件下的差异化气候背景有关,也受风机空间排布特征的影响。研究成果可为气候友好型风电场布局规划提供一定支撑。
