Assessment of the Noise Impact of Chimneys of Thermal Power Plants on Urban Development

The ecological situation of modern megacities significantly depends on large permanent energy facilities located on their territories – thermal power plants. One of the negative factors in this case is the noise of the urban development adjacent to them. Chimneys are among the main sources of noise at these facilities. With a large height of pipes, the noise emitted by them spreads over long distances in the adjacent development. Estimation of the noise regime of the development area in this case is a complex scientific and practical task of building physics. First, the problem of noise propagation from the source to the mouth of the pipe is solved. First, the problem of noise propagation from the source to the pipe mouth is solved. Then, the distribution of the sound energy emitted by the pipe within the urban development is found. To solve the first problem, the combined calculation model proposed by the authors of the article is used. The model takes into account the specular-diffuse character of sound reflection from the channel walls. To solve the second problem, a new method is proposed in the article. It is based on the obtained analytical dependence of the directivity factor of sound energy from the pipe mouth. A computer program has been developed to implement the method. The program makes it possible to assess the propagation of noise from the pipe mouth to various sites of development. To illustrate the method, an example of calculating the noise emitted by the chimney of a steam boiler of a thermal power plant in Moscow is given. The example shows the features of the formation of the noise regime for the case of emission of sound energy by chimneys.

V.P. GUSEV¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.I. LEDENEV^1,2, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.I. ANTONOV^1,2, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.V. MATVEEVA², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Research Institute of Building Physics of Russian Academy of Architecture and Construction Sciences (21, Lokomotivny Driveway, Moscow, 127238, Russian Federation)
² Tambov State Technical University (106, Sovetskaya Street, Tambov, 392000, Russian Federation)

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