A comparison of fuzzy logic and cluster renewal approaches for heat transfer modeling in a 1296 t/h CFB boiler with low level of flue gas recirculation

• Autorzy: Błaszczuk A. , Krzywański J.

Identyfikatory

DOI

10.1515/aoter-2017-0006

• Języki publikacji: EN

Abstrakty

EN

The interrelation between fuzzy logic and cluster renewal approaches for heat transfer modeling in a circulating fluidized bed (CFB) has been established based on a local furnace data. The furnace data have been measured in a 1296 t/h CFB boiler with low level of flue gas recirculation. In the present study, the bed temperature and suspension density were treated as experimental variables along the furnace height. The measured bed temperature and suspension density were varied in the range of 1131–1156 K and 1.93–6.32 kg/m³, respectively. Using the heat transfer coefficient for commercial CFB combustor, two empirical heat transfer correlation were developed in terms of important operating parameters including bed temperature and also suspension density. The fuzzy logic results were found to be in good agreement with the corresponding experimental heat transfer data obtained based on cluster renewal approach. The predicted bed-to-wall heat transfer coefficient covered a range of 109–241 W/(m²K) and 111–240 W/(m²), for fuzzy logic and cluster renewal approach respectively. The divergence in calculated heat flux recovery along the furnace height between fuzzy logic and cluster renewal approach did not exceeded ±2%.

Słowa kluczowe

EN

fuzzy logic; heat transfer coefficient; cluster renewal approach; flue gas recirculation; circulating fluidized bed

PL

logika rozmyta; współczynnik wnikania ciepła; recyrkulacja spalin; cyrkulacyjna warstwa fluidalna

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2017
• Tom: Vol. 38, no. 1
• Strony: 91--122
• Opis fizyczny: Bibliogr. 69 poz., rys., tab., wz.

Twórcy

autor

Błaszczuk A.

• Institute of Advanced Energy Technologies, Czestochowa University of Technology, Dabrowskiego 73, 42-200 Czestochowa, Poland

autor

Krzywański J.

• Jan Dlugosz University in Czestochowa, Faculty of Mathematics and Natural Sciences, Armii Krajowej 13/15, 42-200 Czestochowa, Poland

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Uwagi

EN

This work was financially supported by scientific research No. BS-PB-406/301/11.