European Journal of Sustainable Development Research
Research Article

Preliminary Assessment of Noise Pollution Prevention in Wind Turbines Based on an Exergy Approach

Published online: 30 Jun 2017
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Abstract

Most existing methods for energy transformation and use are inadvertently contaminating our water
supplies, releasing greenhouse gasses into the atmosphere, emitting compounds that diminish the earth's
protective blanket of ozone, and depleting the earth's crust of natural resources. As a result, scientists and
engineers are increasingly pursuing sustainable technologies so that costs associated with global warming
can be minimized and adverse impact on living organisms can be prevented. A promising sustainable
method is to harness energy from the wind via wind turbines. However, the noise generated by wind turbines
proves to be one of the most significant hindrances to the extensive use of wind turbines. In this study,
noise generation produced by flow over objects is investigated to characterize the noise generated due to
flow-structure interaction and aeroacoustics. As a benchmark, flow over a cylinder has been chosen for this
study, with the aim of correlating three main characteristics in noise generation. Hence, the generated sound
pressure level, exergy destroyed and the normal flow velocity (∪ ∞) are employed to characterize the system
in order to relate the exergy destruction to the noise generated in the flow. The correlation has the potential
to be used in wind turbine designs to minimize noise pollution due to aerodynamic noise.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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