Numerical Simulation of Toos Power Plant Boiler to Improve its Thermal Efficiency

Document Type : Original Article

Authors

1 -

2 Ferdowsi University of Mashhad

Abstract

In this study, the boiler of Mashhad Toos power plant is studied numerically in order to investigate the possibility to improve its efficiency and reduce its pollutants emission. In this regard, first the current status of the boiler is simulated and the numerical results are compared with the available experimental data, where a good agreement is observed. Next, the effects of the injected fuel droplets’ diameters, air flow rate and the inlet air swirl direction arrangement on the boiler thermal efficiency and pollution emissions are studied. An appropriate arrangement of the inlet air swirl directions for the nine liquid-fueled burners of the boiler is proposed that will lead to a higher boiler thermal efficiency and lifetime.

Keywords


1. PSL Co. web site at: "http://www.psl.bc.ca", visited at 24th Feb. 2014.
2. Cousin, J. and Ren, W.M., "Recent Developments in Simulations of Internal Flows", Oil & Gas Science and Technology, Vol. 54, pp. 227-231, (1999).
3. Chui, E., Runstedtler, A., Majeski, A., Leach, I. and Macfadyen, N., "Modeling of a Natural Gas-Fired Utility Boiler", Proceedings of Combustion Canada Conference, Vancouver, Canada, (2003).
4. BIOS Co. web site at: "http://www.bios-bioenergy.at/en/".
5. Chaney, J., Liu, H. and Li, J., "An overview of CFD modelling of small-scale fixed-bed biomass pellet boiler with preliminary results from a simplified approach", Energy Conversion and Management, Vol. 63, pp. 149–156, (2012).
6. Zhang, X., Zhou, J., Sun, S., Sun, R. and Qin, M., "Numerical investigation of low NOx combustion strategies in tangentially-fired coal boilers", Fuel, Vol. 142, pp. 215–221, (2015).
7. Liu, G., Chen, Z., Li, Z., Li, G. and Zong, Q., "Numerical simulations of flow, combustion characteristics, and NOx emission for down-fired boiler with different arch-supplied over-fire air ratios", Applied Thermal Engineering, Vol. 75, pp. 1034-1045, (2015).
8. FLUENT 6.3., User's Guide, Fluent Inc., (2006).
9. Tesner, P.A., Tsygankova, E.I., Guilazetdinov, L.P., Zuyev, V.P. and Loshakova, G.V., "The formation of soot from aromatic hydrocarbons in diffusion flames of hydrocarbon-hydrogen mixtures", Journal of Combustion and Flame, Vol. 17, pp. 279-285, (1971).
10. Skjoth-Rasmussen, M.S., Glarborg Ostberg Beltrame, P.A., Porshnev, P., Merchan, M.W., Saveliev, A., Fridman, A., Kennedy, L.A., Petrova, O., Zhdnok, S., Amouri, F. and Charon, O., "Soot and NO formation in methane–oxygen enriched diffusion flames", Journal of Combustion and Flame,
Vol. 124, pp. 295–310, (2001).
11. Semibo, V., Andrade, P. and Carvalho, M.D.G., "Spray characterization: numerical prediction of Sauter mean diameter and droplet size distribution", Fuel, Vol. 75, No. 15, pp. 1707-1714, (1996).
CAPTCHA Image