Modeling of a natural circulation boiler for a coal-fired thermal power station is presented here. The boiler system is divided into seven subcomponents, and for each section, models based on conservation of mass, momentum, and energy are formulated. The pressure drop at various sections and the heat transfer coefficients are computed using empirical correlations. Solutions are obtained by using SIMULINK. The model is validated by comparing its steady state and dynamic responses with the actual plant data. Open loop responses of the model to the step changes in the operating parameters, such as pressure, temperature, steam flow, feed water flow, are also analyzed. The present model can be used for the development and design of effective boiler control systems.

1.
Chein
,
K. L.
,
Ergin
,
E. I.
,
Ling
,
C.
, and
Lee
,
A.
, 1958, “
Dynamic Analysis of a Boiler
,”
Trans. ASME
0097-6822,
80
, pp.
1809
1819
.
2.
Kwan
,
H. W.
, and
Anderson
,
J. H.
, 1970, “
A Mathematical Model of a 200MW Boiler
,”
Int. J. Control
0020-7179,
12
(
6
), pp.
977
998
.
3.
Usoro
,
P. B.
, 1977, “
Modelling and Simulation of a Drum Boiler-Turbine Power Plant Under Emergency State Control
,” Master’s thesis, Massachusetts Institute of Technology.
4.
Tysso
,
A.
, 1981, “
Modelling and Parameter Estimation of a Ship Boiler
,”
Automatica
0005-1098,
17
, pp.
157
166
.
5.
Lu
,
S.
, 1999, “
Dynamic Modelling and Simulation of Power Plant Systems
,”
Proc. Inst. Mech. Eng., Part A
0957-6509,
213
, pp.
7
22
6.
Astrom
,
K. J.
, and
Bell
,
R. D.
, 2000, “
Drum-Boiler Dynamics
,”
Automatica
0005-1098,
33
, pp.
363
378
.
7.
Liu
,
C.
,
Liu
,
J.
,
Niu
,
Y.
, and
Liang
,
W.
, 2001, “
Nonlinear Boiler Model of 300MW Power Unit for System Dynamic Performance Studies
,”
IEEE Trans. Ind. Electron.
0278-0046,
2
, pp.
1296
1300
.
8.
Lo
,
K. L.
,
Song
,
Z. M.
,
Marchand
,
E.
, and
Pinkerton
,
A.
, 1990, “
Development of a Static-State Estimator for a Power Station Boiler. I. Mathematical Model
,”
Electr. Power Syst. Res.
0378-7796,
18
, pp.
175
189
.
9.
Adam
,
E. J.
, and
Marchetti
,
J. L.
, 1999, “
Dynamic Simulation of Large Boilers With Natural Circulation
,”
Comput. Chem. Eng.
0098-1354,
23
, pp.
1031
1040
.
10.
Bhambare
,
K. S.
, 2004, “
Dynamic Simulation of Natural Circulation Boiler
,” Master’s thesis, Indian Institute of Technology Bombay, Mumbai, India.
11.
Mott
,
R. L.
, 1990,
Applied Fluid Mechanics
,
Merrill Publishing Company
,
Columbus, OH
.
12.
Collier
,
J. G.
, 1972,
Convective Boiling and Condensation
,
McGraw Hill
,
New York
.
13.
Thom
,
J. R. S.
, 1964, “
Prediction of Pressure Drop During Forced Circulation Boiling of Water
,”
Int. J. Heat Mass Transfer
0017-9310
7
, pp.
709
724
.
14.
Kandlikar
,
S. G.
, 1990, “
A General Sorrelation for Saturated Two-Phase Flow Boiling Heat Transfer Inside Horizontal and Vertical Tubes
,”
ASME J. Heat Transfer
0022-1481,
112
, pp.
219
228
.
15.
Rohsenow
,
W. M.
, and
Hartnett
,
J. P.
, 1998,
Handbook of Heat Transfer
,
McGraw-Hill
,
New York
.
16.
Blokh
,
A. G.
, 1988,
Heat Transfer in Steam Boiler Furnaces
,
Hemisphere Publishing Corporation
,
Washington, DC
.
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