Wszystkie pola: supercritical CFB boiler - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of sampling point on solids suspension density applied in scaling of the hydrodynamics of a supercritical CFB boiler
Autorzy:: Mirek, P.
Ziaja, J.
Powiązania:: https://bibliotekanauki.pl/articles/185607.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hydrodynamika
skalowanie
circulating fluidised bed
hydrodynamics
scaling
Opis:: The article presents the results of laboratory tests carried out on a scaling model of the 966MW the fluidised-bed boiler operating in the Lagisza Power Plant, made on a scale of 1:20 while preserving the geometrical similarity. The tests were carried out for scaled-down material taken from different locations on the circulation contour in the state of full boiler loading. To reflect the hydrodynamic conditions prevailing in the combustion chamber, solids with properly selected density and particle size distribution were used. The obtained results have made it possible to determine the location for taking the most representative granular material sample.
Źródło:: Chemical and Process Engineering; 2011, 32, 4; 391-399
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Bed-to-wall heat ransfer in a supercritical circulating fluidised bed boiler
Autorzy:: Błaszczuk, A.
Nowak, W.
Jagodzik, S.
Powiązania:: https://bibliotekanauki.pl/articles/185814.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: współczynnik przenoszenia ciepła
gęstość zawiesiny
temperatura pieca
kocioł CFB w stanie nadkrytycznym
heat transfer coefficient
suspension density
furnace temperature
circulating fluidised bed
supercritical CFB boiler
cluster renewal approach
Opis:: The purpose of this work is to find a correlation for heat transfer to walls in a 1296 t/h supercritical circulating fluidised bed (CFB) boiler. The effect of bed-to-wall heat transfer coefficient in a long active heat transfer surface was discussed, excluding the radiation component. Experiments for four different unit loads (i.e. 100% MCR, 80% MCR, 60% MCR and 40% MCR) were conducted at a constant excess air ratio and high level of bed pressure (ca. 6 kPa) in each test run. The empirical correlation of the heat transfer coefficient in a large-scale CFB boiler was mainly determined by two key operating parameters, suspension density and bed temperature. Furthermore, data processing was used in order to develop empirical correlation ranges between 3.05 to 5.35 m x s-1 for gas superficial velocity, 0.25 to 0.51 for the ratio of the secondary to the primary air, 1028 to 1137K for bed temperature inside the furnace chamber of a commercial CFB boiler, and 1.20 to 553 kg x m-3 for suspension density. The suspension density was specified on the base of pressure measurements inside the boiler’s combustion chamber using pressure sensors. Pressure measurements were collected at the measuring ports situated on the front wall of the combustion chamber. The obtained correlation of the heat transfer coefficient is in agreement with the data obtained from typical industrial CFB boilers.
Źródło:: Chemical and Process Engineering; 2014, 35, 2; 191-204
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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