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Evaluating an 80 Hz tonal noise from a hydropower plant

100%

Wallner P., Hutter H.-P., Moshammer H.

International Journal of Occupational Medicine and Environmental Health

2019

vol. 32

issue 3

401-411

A pumped storage power plant produces significant noise such that adjacent areas were deemed uninhabitable for the local population. In recent years, the population in the area has increased, and the noise levels are now causing significant distress to the local population. The company operating the power plant and a citizens’ initiative have both commissioned noise measurements. The measurements showed that the continuous pump noise was audible over many kilometers. The A-weighted sound-pressure level of 50 dBA at the next residential area underestimates the perceived noise, given the clear tonal nature in the low frequency range. Interviews of the exposed population, together with detailed “annoyance diaries” by a sample of the residents, proved their high level of annoyance. Their reported observations on distress and sleep disturbances coincide with the time course of the pumping operation. The pumping noise leads to annoyance in a large area, and to considerable nuisance in a smaller one. For the most exposed homes, long-term exposure might be considered a health hazard due to stress and disturbances in sleep quality. Therefore, the operator committed to developing a technical noise control plan. This case shows that a scientific approach within a complex environmental noise problem can foster an agreement about noise protection measures. However, this can only be successful if all involved parties participate in the process. Pilot studies are underway to test the impact of damping material layers on the pipes, the housing of the pipes, and the kind of air vessel solutions between the pumps and the pipes. Int J Occup Med Environ Health. 2019;32(3):401–11

The small hydroelectric power stations as an element of the multifunctional development of rural areas

67%

Bukowski M.

Problemy Rolnictwa Światowego

2007

vol. 01(16)

Poland’s accession to the EU has caused a necessity of harmonising Polish with the union law also in the field of energy law. It also enforces achievement of 7,5% share of energy from alternative sources in the total energy consumption in 2010. Execution of this international commitment will require more economic and legal support from the state. The development of alternative sources of energy creates chances of development of rural areas where these kinds of installations are being mostly located. This article presents an analysis of the economic efficiency of energy production on an example of 5 small hydroelectric power stations. The analysis is based on a comparison of full unit costs and unit revenue from energy sale. Bigger stations proved economically efficient while for the smaller the break even point is associated with an average water flow of 153 million m3/year.

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1 International Journal of Occupational Medicine and Environmental Health

1 Problemy Rolnictwa Światowego

1 Bukowski M.

1 Hutter H.-P.

1 Moshammer H.

1 Wallner P.

1 2019

1 2007

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Evaluating an 80 Hz tonal noise from a hydropower plant

The small hydroelectric power stations as an element of the multifunctional development of rural areas