Abstract

Comprehensive exergy analysis of a heat recovery steam generator (HRSG) with two levels of delivered pressure is presented. The effects of supplementary firing as well as desuperheater set-point are considered to evaluate the exergy destruction of HRSG components. Burner firing rate is limited to a value that corresponds to the maximum allowable temperature of tube metal of high-pressure (HP) superheater. According to the exergy analysis performed in the current study, the exergy efficiency of HRSG is about 80% which means 20% of flue gas exergy (entering HRSG) is dissipated by HRSG destruction (∼14%) and stack exergy loss (∼6%). The stack exergy loss drops continuously as supplementary firing raises. It has also been determined that increasing the rate of supplementary firing boosts the exergy efficiency in the absence of water spray and reduces it when desuperheater is working. In addition, the exergy delivered to steam turbine shows a linear growth with burner heat while it is hardly affected by the set-point of desuperheater. Also, it is found that exergy loss through the stack is not sensitive to desuperheater set-point while it is on the decrease as burner duty raises. HP steam flow will raise with increasing the firing and/or decreasing the desuperheater set-point. HP evaporator has the most contribution in exergy destruction among HRSG components (∼40%), whereas HP superheater and desuperheater are components with a maximum sensitivity of exergy destruction to the amount of water spray.

References

References
1.
Woudstra
,
N.
,
Woudstra
,
T.
,
Pirone
,
A.
, and
Van Der Stelt
,
T.
,
2010
, “
Thermodynamic Evaluation of Combined Cycle Plants
,”
Energy Convers. Manage.
,
51
(
5
), pp.
1099
1110
. 10.1016/j.enconman.2009.12.016
2.
Pathirathna
,
K. A. B.
,
2013
, “
Gas Turbine Thermodynamic and Performance Analysis Methods Using Available Catalog Data
,”
Master thesis
,
University of Gavle
,
Gavle, Sweden
.
3.
Díaz
,
A. G.
,
Fernández
,
E. S.
,
Gibbins
,
J.
, and
Lucquiaud
,
M.
,
2016
, “
Sequential Supplementary Firing in Natural Gas Combined Cycle With Carbon Capture: A Technology Option for Mexico for Low-Carbon Electricity Generation and CO2 Enhanced Oil Recovery
,”
Int. J. Greenhouse Gas Control
,
51
, pp.
330
345
. 10.1016/j.ijggc.2016.06.007
4.
Copen
,
J. H.
, and
Sullivan
,
T. B.
,
November 2006
,
Introduction to the Complementary Fired Combined Cycle Power Plant
,
POWER-GEN International
,
Orlando, FL
,
28
30
.
5.
Finckh
,
H. H.
, and
Pfost
,
H.
,
1992
, “
Development Potential of Combined-Cycle (GUD) Power Plants With and Without Supplementary Firing
,”
ASME J. Eng. Gas Turbines Power
,
114
(
4
), pp.
653
659
. https://doi.org/10.1115/1.2906638
6.
Hoang
,
T.
, and
Pawluskiewicz
,
D. K.
,
2016
, “
The Efficiency Analysis of Different Combined Cycle Power Plants Based on the Impact of Selected Parameters
,”
Int. J. Smart Grid Clean Energy
,
5
(
2
), pp.
77
85
. 10.12720/sgce.5.2.77-85
7.
Alobaid
,
F.
,
Ströhle
,
J.
,
Epple
,
B.
, and
Kim
,
H. G.
,
2009
, “
Dynamic Simulation of a Supercritical Once-Through Heat Recovery Steam Generator During Load Changes and Start-up Procedures
,”
Appl. Energy
,
86
(
7–8
), pp.
1274
1282
. 10.1016/j.apenergy.2008.09.013
8.
Aurora
,
C.
,
2004
, “
Power Plants: Modeling, Simulation and Control
,”
Doctoral dissertation, PhD thesis
,
University of Pavia
.
9.
Tica
,
A.
,
2012
, “
Design, Optimization and Validation of Start-up Sequences of Energy Production Systems
,”
Doctoral dissertation
,
Supélec
.
10.
Dincer
,
I.
, and
Cengel
,
Y. A.
,
2001
, “
Energy, Entropy and Exergy Concepts and Their Roles in Thermal Engineering
,”
Entropy
,
3
(
3
), pp.
116
149
. 10.3390/e3030116
11.
Kaushik
,
S. C.
,
Reddy
,
V. S.
, and
Tyagi
,
S. K.
,
2011
, “
Energy and Exergy Analyses of Thermal Power Plants: A Review
,”
Renewable Sustainable Energy Rev.
,
15
(
4
), pp.
1857
1872
. 10.1016/j.rser.2010.12.007
12.
Sreedharan
,
H.
,
Reshma
,
J. R.
,
Jacob
,
J. K.
, and
Sivakumar
,
V. V.
,
2016
, “
Energy and Exergy Analysis on 350MW Combined Cycle Power Plant
,”
Eur. J. Technol. Des.
,
12
(
2
), pp.
72
78
.
13.
Ghorbanzadeh
,
D.
,
Ghashami
,
B.
,
Masoudi
,
A.
, and
Khanmohammadi
,
S. H.
,
2007
, “
Exergy Analysis of NEKA-IRAN Heat Recovery Steam Generator at Different Ambient Temperature
,”
Proc. of the 3rd IASME/WSEAS Int. Conf. on Energy, Environment, Ecosystems and Sustainable Development
,
Agios Nikolaos, Greece
,
July 24–26
, pp.
493
498
.
14.
Ghaebi
,
H.
,
Amidpour
,
M.
,
Karimkashi
,
S.
, and
Rezayan
,
O.
,
2011
, “
Energy, Exergy and Thermoeconomic Analysis of a Combined Cooling, Heating and Power (CCHP) System With Gas Turbine Prime Mover
,”
Int. J. Energy Res.
,
35
(
8
), pp.
697
709
. 10.1002/er.1721
15.
Almutairi
,
A.
,
Pilidis
,
P.
, and
Al-Mutawa
,
N.
,
2015
, “
Energetic and Exergetic Analysis of Combined Cycle Power Plant: Part-1 Operation and Performance
,”
Energies
,
8
(
12
), pp.
14118
14135
. 10.3390/en81212418
16.
Ali
,
M. S.
,
Shafique
,
Q. N.
,
Kumar
,
D.
,
Kumar
,
S.
, and
Kumar
,
S.
,
2018
, “
Energy and Exergy Analysis of a 747-MW Combined Cycle Power Plant Guddu
,”
Int. J. Ambient Energy
, pp.
1
10
. 10.1080/01430750.2018.1517680
17.
Moosazadeh Moosavi
,
S. A.
,
Mafi
,
M.
,
Kaabi Nejadian
,
A.
,
Salehi
,
G.
, and
Torabi Azad
,
M.
,
2018
, “
A New Method to Boost Performance of Heat Recovery Steam Generators by Integrating Pinch and Exergy Analyses
,”
Adv. Mech. Eng.
,
10
(
5
), p.
1687814018777879
. 10.1177/1687814018777879
18.
Sahin
,
H. E.
, and
Aydin
,
M.
,
2012
, “
Energy and Exergy Analysis of a Supercritical Power Plant With 600 MW Output in Turkey
,”
Global Conference on Global Warming
,
Istanbul, Turkey
,
July 8–12
.
19.
Vandani
,
A. M. K.
,
Bidi
,
M.
, and
Ahmadi
,
F.
,
2015
, “
Exergy Analysis and Evolutionary Optimization of Boiler Blowdown Heat Recovery in Steam Power Plants
,”
Energy Convers. Manage.
,
106
, pp.
1
9
. 10.1016/j.enconman.2015.09.018
20.
Kaviri
,
A. G.
,
Jaafar
,
M. N. M.
,
Lazim
,
T. M.
, and
Barzegaravval
,
H.
,
2013
, “
Exergoenvironmental Optimization of Heat Recovery Steam Generators in Combined Cycle Power Plant Through Energy and Exergy Analysis
,”
Energy Convers. Manage.
,
67
, pp.
27
33
. 10.1016/j.enconman.2012.10.017
21.
Srinivas
,
T.
,
2010
, “
Thermodynamic Modelling and Optimization of a Dual Pressure Reheat Combined Power Cycle
,”
Sadhana
,
35
(
5
), pp.
597
608
. 10.1007/s12046-010-0037-6
22.
Esmaieli
,
A.
,
Keshavarz
,
M. P.
,
Shakib
,
S. E.
, and
Amidpour
,
M.
,
2013
, “
Applying Different Optimization Approaches to Achieve Optimal Configuration of a Dual Pressure Heat Recovery Steam Generator
,”
Int. J. Energy Res.
,
37
(
12
), pp.
1440
1452
. 10.1002/er.2944
23.
Kowalczyk
,
B.
,
Kowalczyk
,
C.
,
Rolf
,
R. M.
, and
Badyda
,
K.
,
2014
, “
Model of an ANSALDO V94. 2 Gas Turbine From Lublin Wrotków Combined Heat and Power Plant Using GateCycle Software
,”
J. Power Technol.
,
94
(
3
), pp.
190
195
.
24.
Dincer
,
I.
, and
Rosen
,
M. A.
,
2012
,
Exergy: Energy, Environment and Sustainable Development
,
Newnes
,
Oxford, UK
.
25.
Ganapathy
,
V.
,
2003
,
Industrial Boilers and Heat Recovery Steam Generators
,
Marcel Dekker Inc.
,
New York
.
26.
ESCOA
,
E. T. X. H.
, and
Soldfin
,
H. F.
,
1979
,
Rating Instructions
,
ESCOA
,
Pryor, OK
.
You do not currently have access to this content.