Thermal effectiveness of the PTVM 100 (R) hot-water boiler at different burners
load

Yavor Dinkov1, Peter Stankov2, Detelin Markov2, Friedrich Dinkelacker3
1 Kozloduy Nuclear Power Plant, Training Center, 3321 Kozloduy, BULGARIA
2 Technical University of Sofia, Department of Hydroaerodynamics and Hydraulic
Machines,
8 Kliment Ochridsky boulevard, 1000 Sofia, BULGARIA
3 Lehrstuhl fuer Technische Thermodynamik, Friedrich-Alexander Universitaet,
Erlangen-Nuernberg, Am Weichselgarten 8, D-91058 Erlangen, GERMANY

ABSTRACT

The principle goal of the paper is to investigate the influence of the burners
load based
on the fuel balance on the thermal effectiveness of a PTVM 100 (R) hot-water
boiler at rated
power 116.3 MW. The boiler is equipped with 6 swirl type burners located in a
row of three
on the front wall at elevation of 2.9m above the furnace bottom and on the
opposite wall at
elevation of 5.1m. The natural gas flow rate of 2.555 kg/s at excess air of
1.075 is supplied
to the front wall row of burners and to the rear wall row of burners in the
following four
proportion: 50:50, 60:40, 70:30 and 80:20. The developed by the authors
combustion simulation
code based on the Favre averaged 3D transport equations, the standard k-e
turbulence model,
the Eddy-Dissipation combustion model and the discrete ordinate method for
radiate heat transfer
modeling is used. The influence of the burner load on the flow character within
the furnace
volume, on the heat-release density and on the heat flux absorbed by the walls
is analyzed.