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Wyszukujesz frazę "wind turbines" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Annoyance Related to Wind Turbine Noise
Autorzy:
Pawlaczyk-Łuszczyńska, M.
Dudarewicz, A.
Zaborowski, K.
Zamojska-Daniszewska, M.
Waszkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/178067.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wind turbines
noise
annoyance
Opis:
A questionnaire inquiry on response to wind turbine noise was carried out on 361 subjects living in the vicinity of 8 wind farms. Current mental health status of respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where respondents lived, A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. Generally, 33.0% of respondents were annoyed outdoors by wind turbine noise at the calculated A-weighted SPL of 31–50 dB, while indoors the noise was annoying to 21.3% of them. The propor- tion of subjects evaluating the noise produced by operative wind turbines as annoying decreased with increasing the distance from the nearest wind turbine (27.6% at the distance of 400–800 m vs 14.3% at the distance above 800 m, p < 0.016). On the other hand, the higher was the noise level, the greater was the percentage of annoyed respondents (14.0% at SPL up to 40 dB vs 28.1% at SPL of 40–45 dB, p < 0.016). Besides noise and distance categories, subjective factors, such as general attitude to wind turbines, sensitivity to landscape littering and current mental health status, were found to have significant impact on the perceived annoyance. About 50% of variance in annoyance rating might be explained by the aforesaid subjective factors.
Źródło:
Archives of Acoustics; 2014, 39, 1; 89-102
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards the design of low noise level wind turbines
Autorzy:
Chaja, P.
Koronowicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/1943196.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska
Tematy:
vortex theory
noise
wind turbines
Opis:
According to the authors’ hypothesis generation of high intensity noise is caused by generation of vorticity structures inducing velocities that can be locally higher than the velocity of sound. The localization and magnitude of vorticity concentration can be precisely defined on the basis of a double layer vortex model. Knowing the localization and mechanism of generation of significantly high induced velocities, turbine blades can be shaped in such a way so as to decrease the concentration of vorticity in these zones. According to the hypothesis described in this paper, a modification of turbine blades at the design stage results in their quieter operation for higher loads and wind velocities. The authors base their hypothesis on the experience from design works concerning low noise ship propellers. The following paper focuses on these tasks.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2009, 13, 4; 393-401
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of annoyance from the wind turbine noise: A pilot study
Autorzy:
Pawlaczyk-Łuszczyńska, Małgorzata
Dudarewicz, Adam
Zaborowski, Kamil
Zamojska-Daniszewska, Małgorzata
Waszkowska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2178846.pdf
Data publikacji:
2014-06-21
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
wind turbines
noise
health effects
annoyance
Opis:
Objectives: The overall aim of this study was to evaluate the perception of and annoyance due to the noise from wind turbines in populated areas of Poland. Material and Methods: The study group comprised 156 subjects. All subjects were asked to fill in a questionnaire developed to enable evaluation of their living conditions, including prevalence of annoyance due to the noise from wind turbines and the self-assessment of physical health and well-being. In addition, current mental health status of the respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where the respondents lived, A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. Results: It has been shown that the wind turbine noise at the calculated A-weighted SPL of 30-48 dB was noticed outdoors by 60.3% of the respondents. This noise was perceived as annoying outdoors by 33.3% of the respondents, while indoors by 20.5% of them. The odds ratio of being annoyed outdoors by the wind turbine noise increased along with increasing SPLs (OR = 2.1; 95% CI: 1.22-3.62). The subjects' attitude to wind turbines in general and sensitivity to landscape littering was found to have significant impact on the perceived annoyance. About 63% of variance in outdoors annoyance assessment might be explained by the noise level, general attitude to wind turbines and sensitivity to landscape littering. Conclusions: Before firm conclusions can be drawn further studies are needed, including a larger number of respondents with different living environments (i.e., dissimilar terrain, different urbanization and road traffic intensity).
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 3; 364-388
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza hałasu infradźwiękowego emitowanego przez turbiny wiatrowe różnych mocy
Comparative analysis of infrasound noise emitted by wind turbines of various power
Autorzy:
Malec, T.
Boczar, T.
Wotzka, D.
Powiązania:
https://bibliotekanauki.pl/articles/157892.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
turbiny wiatrowe
hałas
infradźwięki
wind turbines
noise
infrasound
Opis:
W ramach artykułu przedstawiono wyniki analizy porównawczej poziomu ciśnienia akustycznego hałasu infradźwiękowego generowanego przez dwie turbiny wiatrowe dużych mocy tj. fabrycznie nowej REPOWER typ MM92 o mocy elektrycznej 2 MW i eksploatowanej od pięciu lat Vensys typ 62 o mocy elektrycznej 1,2 MW. W części wynikowej przedstawiono przebiegi widm częstotliwościowych i spektrogramów, które wyznaczono dla zarejestrowanych sygnałów niskoczęstotliwościowych. W celach porównawczych charakterystyki obliczono oddzielnie dla badanych turbin z uwzględnieni m/s. Pozwoliło to określić wielkość oddziaływania infradźwiękowego badanych turbin i zbadać czy na kształt widm emitowanego hałasu wpływa prędkość wiatru oraz konstrukcja, typ i czas eksploatacji badanych turbin. Uzyskane z pomiarów wielkości zostały odniesione i porównane z wartościami granicznymi określonymi w obwiązujących w tym zakresie normami.
The subject area of this paper is infrasound signals generated by work of modern wind turbines. Measurements of infrasound noise were taken in accordance with the PN-EN 61400-11:2002 [7] and PN-EN 61400-11:2004/A1 [8] standards. A comparative analysis of the measurement results of the infrasound noise generated by two types of high-power wind turbines i.e. REPOWER MM92 of electric power 2 MW and Vensys 62 of electric power of 1.2 MW is presented in the paper. The first studied turbine is brand new and the other has been in operation for five years. The aim of the analyzes was to determine the frequency spectra of the recorded infrasound signals (Figs. 6, 7, 10, 13, 16) and to calculate the corresponding spectrograms (Figs. 8, 9, 11, 12, 14, 15). For comparative purposes, the characteristics presented in this paper, were calculated separately for the analyzed turbines taking into account three selected values of wind speed: 5. m/s, 6.3 m/s and 7.6 m/s. On the basis of the obtained results the influence of wind speed changes on the generated levels of low-frequency acoustic signals was determined. Then, the dependencies obtained from measurements were referred and compared to the limits defined in the appropriate standards.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 9, 9; 773-778
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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