Computational simulations of flow and heat transfer in heat recovery steam generators (HRSGs) of vertical- and horizontal-tube designs are reported. The main objective of the work was to obtain simple modifications of their internal configuration that render the flow of combustion gas more spatially uniform. The computational method was validated by comparing some of the simulation results for a scaled-down laboratory model with experimental measurements in the same. Simulations were then carried out for two plant HRSGs—without and with the proposed modifications. The results show significantly more uniform combustion gas flow in the modified configurations. Heat transfer calculations were performed for one superheater section of the vertical-tube HRSG to determine the effect of the configuration modification on heat transfer from the combustion gas to the steam flowing in the superheater tubes.

1.
Buecker
,
B.
, 2002,
Basics of Boiler and HRSG Design
,
2nd ed.
,
PennWell
,
Tulsa, OK
.
2.
Lee
,
B.
,
Kwon
,
S. B.
, and
Lee
,
C.
, 2002, “
On the Effect of Swirl Flow of Gas Turbine Exhaust in an Inlet Duct of Heat Recovery Steam Generator
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
124
(
4
),
496
504
.
3.
Fluent User’s Guide, 2004, Fluent, Inc., Lebanon, NH.
4.
Ferziger
,
J. H.
, and
Peric
,
M.
, 1996,
Computational Methods for Fluid Dynamics
,
Springer-Verlag
,
New York
.
5.
Incropera
,
F. P.
, and
DeWitt
,
D. P.
, 2002,
Fundamentals of Heat and Mass Transfer
,
5th ed.
,
John
,
New York
.
6.
Idelchik
,
I.
, 1994,
Handbook of Hydraulic Resistance
,
3rd ed.
,
CRC
,
Boca Raton, FL
.
You do not currently have access to this content.