Fault simulation of boiler heating surface ash deposition in a power plant system

Abstract

The simulation model of a power generation system was developed based on EASY5 simulation platform. The performances of the power plant under the conditions of the furnace slagging and ash deposition of the heating surfaces in the boiler were simulated. The results show that the simulation model can reasonably reflect the characteristics of the power plant when each component is under fault conditions. Through fault simulation, the change of the performance parameters can be obtained, which can be used in fault diagnosis system as the diagnosis criterion for expert system.

Keywords

boiler / slagging / ash deposition / fault simulation

References

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Acknowledgements

This work was supported by Program of Shanghai Subject Chief Scientist (No. 08XD14021) and Science and Technology Committee of Shanghai Municipal (Nos. 09DZ1200701, 09DZ1200702).

Notations
A	Heat transfer area/m2
C	Specific heat/(kJ·kg-1·K-1)
h	Enthalpy/(kJ·kg-1)
K	Heat transfer coefficient/(kJ·m-2·K-1)
n	Rotary speed/(r·s-1)
p	Pressure/MPa
P	Power/MW
Q	Heat transfer/kJ
S	Entropy/(kJ·kg-1·K-1)
t	Time/s
T	Temperature/°C
w	Mass flow rate/(kg·s-1)
V	Volume/m3
\beta	Amount of gas of fuel/(kg·kg-1)
\gamma	Cooling coefficient in heater
ξ	Combustion efficient
\pi	Pressure ratio

\eta	Efficiency

Subscripts

o	Output
r	Rating condition
t	Turbine
a	Air
b	Saturation
c	Cold water
cr	Critical parameter
eb	Entropy balance
f	Fuel
fw	Feed water
g	Gas
i	Input
m	Metal
s	Steam
w	Water

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