Autor: Pakowski, Z. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effective diffusivity of moisture in low rank coal during superheated steam drying at atmospheric pressure
Autorzy:: Pakowski, Z.
Adamski, R.
Kwapisz, S.
Powiązania:: https://bibliotekanauki.pl/articles/185513.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wilgoć
dyfuzja
węgiel brunatny
moisture
diffusion
lignite
Opis:: The effective diffusivity of water in brown coal of Bełchatów mine was experimentally determined. The experiments were performed in superheated steam at 200 [degrees]C and atmospheric pressure using slightly compressed pellets of cylindrical shape. The drying and temperature curves of the sample were used to identify diffusivity. An inverse problem was formulated and solved by the finite element method for 3D axially symmetric cylindrical geometry of the sample. A satisfactory fit of the simulated curves to experimental results was obtained. The obtained dependence of effective diffusivity on moisture content and temperature may be used in designing lignite dryers.
Źródło:: Chemical and Process Engineering; 2012, 33, 1; 43-51
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Selection of sound insulating elements in hydraulic excavators based onidentification of vibroacoustic energy propagation paths
Autorzy:: Dąbrowski, Z.
Dziurdź, J.
Pakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/177189.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: noise and vibration
propagation path
coherence function
Opis:: In spite of the fact that standardizing operations and increased awareness of hazards led to a significant improvement of vibroacoustic climate of operator’s stands of new machines, their long-term operation - often under difficult conditions - leads to a fast degradation of acoustic qualities of machines. Temporary operations performed during surveys and periodical overhauls are rarely effective, due to the lack of any guidelines. In this situation the authors propose the algorithm for selection of eventual screens or sound absorbing and sound insulating partitions, utilizing the measuring procedure aimed at identification, at the operator’s stand, of main noise components originated from various sources. On the basis of this procedure, the vibroacoustic energy propagation paths in the machine was estimated.
Źródło:: Archives of Acoustics; 2013, 38, 4; 471-478
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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