Neil Johnson
School of Architecture, University of Sheffield, Sheffield, UK
Jian Kang
School of Architecture, University of Sheffield, Sheffield, UK
Steve Sharples
School of Architecture, University of Sheffield, Sheffield, UK
Abigail Hathway
School of Civil and Structural Engineering, University of Sheffield, Sheffield, UK
Papatya Dökmeci
School of Architecture, University of Sheffield, Sheffield, UK
Ladda ner artikel
http://dx.doi.org/10.3384/ecp110571448Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:10, s. 1448-1455
Publicerad: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
Micro hydro systems can be regarded as a renewable energy source resulting from the natural hydrological cycle; it is by some considered sustainable due to the lack of impoundment of water and assumed negligible environmental impact. Experience with wind energy has highlighted that as the uptake of renewable energy technologies increases so government policies need to keep pace if public complaints and rejection of these technologies is to be averted. Studies on micro hydropower; particularly in an urban setting where propagation of noise is a planning issue; have been very limited. This paper focuses on the acoustic environmental impacts of micro hydropower considering a Reverse Archimedean Screw (RAS). Acoustic samples were taken directly above the RAS; and on a 5m interval along a transect and then at; 30m and 60m along another transect. Two further transects were considered and sampling was made at 30m and 60m. Initial results indicate that during normal operation at 25kW the screw would be barely perceptible beyond 60m; the weir provides significant masking of the turbine noise. It also shows that the noise generated is directional in nature at this site.
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