On the Flow over High-rise Building for Wind Energy Harvesting: An Experimental Investigation of Wind Speed and Surface Pressure
Kostadinović Vranešević, Kristina
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The human migration from rural to urban areas has triggered a chain reaction causing the spiking energy demand of cities worldwide. High-rise buildings ﬁlling the urban skyline could potentially provide a means to improve the penetration of renewable wind energy by installing wind turbines at their rooftop. However, the above roof ﬂow region has not received much attention and most results deal with low-rise buildings. This study investigates the ﬂow pattern above the roof of a high-rise building by analysing velocity and pressure measurements performed in an atmospheric boundary layer wind tunnel, including four wind directions and two diﬀerent roof shapes. Comparison of the surface pressure patterns on the ﬂat roof with available low-rise building studies shows that the surface pressure contours are consistent for a given wind direction. At 0◦ wind direction, a separation bubble is detected, while cone vortices dominate at 30◦ and 45◦. The determining factor for the installation of s...mall wind turbines is the vicinity to the roof. Thus, 45◦ wind direction shows to be the most desirable angle by bringing the substantial ampliﬁcation of wind and keeping the turbulence intensity low. Decking the roof creates favourable characteristics by overcoming the sensitivity to the wind direction while preserving the speed-up eﬀect.
Ključne reči:wind tunnel experiments / velocity measurements / pressure measurements / urban wind energy harvesting
Izvor:Applied Sciences, 2020, 10
Finansiranje / projekti:
- COST-Action TU1304
- Luxembourg National Research Fund (FNR) under project reference C19/SR/13639741.