Humidified gas turbines (HGT) have been identified as an promising way of producing power and their use in combined power and water desalination systems is analyzed, employing energy and exergy performance criteria. Based on two representative HGT cycles, the steam-injected gas turbine (STIG) cycle and evaporative gas turbine (EvGT) cycle, two combined systems are proposed. After analyzing the characteristic of desalination units, a multi-effect thermal vapor compression (METVC) unit run by the exhaust heat of the power cycle is chosen to produce fresh water from seawater for both general use and the HGT humidification. Some of the main results are: the fuel consumption of water production in a STIG-based combined system is about 45% of a water-only unit, and that in a EvGT-based system it is 31%~54%; compared with the individual power-only and water-only units, the fuel savings of the two combined system are 12%~28% and 10%~21%, respectively; a water production gain of more than 15% can be obtained by using a direct-contact seawater-gas heat exchanger to recover the stack heat; and the two combined systems are more flexible in their power-to-water ratio than currently used dual-purpose systems.

Volume Subject Area:
Advanced Energy Systems
Keywords:
Integrated power and water system, Humidified gas turbine cycle, Multi-effect thermal vapor compression desalination
Topics:
Compression, Cycles, Energy generation, Gas turbines, Vapors, Water
1.
Jonsson
 
M.
,
Yan
 
J.
,
Humidified gas turbines—a review of proposed and implemented cycles
,
Energy
,
30
(
2005
):
1013
–
1078
2.
De Paepe
 
M.
,
Dick
 
E.
,
Technological and economical analysis of water recovery in steam injected gas turbines
,
Applied Thermal Engineering
,
21
(
2001
):
135
–
156
3.
Nguyen
 
H. B.
,
den Otto
 
A.
,
Development of gas turbine steam injection water recovery (SWIR) system
,
ASME Journal of Engineering for Gas Turbines and Power
,
116
(
1994
):
68
–
74
4.
R.P.W.Poels, W.L.R.Gallo, A study on water recovery and reuse for HAT (humid air turbine) cycle, Proceedings of ECOS, Netherlands, 2000: 599–608
5.
Q. Zheng, G.Wang, Y.Sun, S.Liu, Experiments on water and heat recovery of steam injection gas turbine (STIG) power plant, Proceedings of ASME-IGTI TURBO, Orlando, USA, 97-GT-434, 1997
6.
Rydstrand
 
M. C.
,
Westermark
 
M. O.
,
Brtlett
 
M. A.
,
An analysis of the efficiency and economy of humidified gas turbine in district heating applications
,
Energy
,
29
(
2004
):
1945
–
1961
7.
Cerri
 
G.
,
Arsuffi
 
G.
,
Stean-injected gas turbine integrated with a self-production demineralized water thermal plant, ASME
Journal of Engineering for Gas Turbines and Power
,
110
(
1998
):
8
–
16
8.
Poullikkas
 
A.
,
Technical and economic analysis for the integration of small reverse osmosis desalination plants into MAST gas turbine cycles for power generation
,
Desalination
,
172
(
2005
):
145
–
150
9.
J.K. Horlock, Cogeneration—combined heat and power (CHP): thermodynamics and economics, Pergamon press, Oxford, New York, 1987
10.
A. Husain, Integrated power and desalination plants, Eolss Publishers Co. Ltd., Oxford, UK, 2003
11.
El-Nasgar
 
A. M.
,
Cogeneration for power and desalination—state of the art review
,
Desalination
,
134
(
2001
):
7
–
28
12.
Ludwig
 
H.
,
Hybrid systems in seawater desalination—practical design aspects, present status and development perspectives
,
Desalination
,
164
(
2004
):
1
–
18
13.
Darwish
 
M. A.
,
Najem
 
N. Al
,
Co-generation power desalting plants: a new outlook with gas turbine
,
Desalination
,
161
(
2004
):
1
–
12
14.
Szacsvay
 
T.
,
Posnansky
 
M.
,
Distillation desalination systems powered by waste heat from combined cycle power generation units
,
Desalination
,
136
(
2001
):
133
–
140
15.
Darwish
 
M. A.
,
Asfour
 
F. Al
,
Al-Najem
 
N.
,
Energy consumption in equivalent work by different desalting methods: case study for Kuwait
,
Desalination
152
(
2002
):
83
–
92
16.
Afgan
 
N. H.
,
Darwish
 
M.
,
Garvalho
 
G.
,
Sustainability assessment of desalination plants for water production
,
Desalination
124
(
1999
):
19
–
31
17.
Raluy
 
R. G.
,
Serra
 
L.
,
Uche
 
J.
,
Valero
 
A.
,
Life-cycle assessment of desalination technologies integrated with energy production systems
,
Desalination
,
167
(
2004
):
445
–
458
18.
Dvornikov
 
V.
,
Seawater multi-effect distillation energized by a combustion turbine
,
Desalination
,
127
(
2000
):
261
–
269
19.
Darwish
 
M. A.
,
Alsairafi
 
A.
,
Technical comparison between TVC/MEB and MSF
,
Desalination
,
170
(
2004
):
223
–
239
20.
Kronenberg
 
G.
,
Kokiec
 
F.
,
Low-temperature distillation processes in single- and dual-purpose plants
,
Desalination
,
136
(
2001
):
189
–
197
21.
Economic and Social Commission for Western Asia, Water desalination technologies in the ESCWA member countries, United Nations Publication, New York, 2001
22.
http://www.fchart.com/ees/ees.shtml/
23.
H. El-Dessouky, T. Hisham, Fundamentals of salty water desalination, Elsevier, 2002
24.
R. Power, Steam jet ejector for the process industries, McGraw Hill, NY, 1994
25.
Alafour
 
F. N.
,
Darwish
 
M. A.
,
Bin Amer
 
A. O.
,
Thermal analysis of METVC+MEE desalination systems
,
Desalination
,
174
(
2005
):
39
–
57
26.
Darwish
 
M. A.
,
El-Dessouky
 
H.
,
The heat recovery thermal vapour-compression desalination system: a comparison with other processes
,
Applied Thermal Engineering
,
16
(
1996
):
523
–
537
27.
Michels
 
T.
,
Recent achievements of low temperature multiple effect desalination in the western area of Abu Dhabi
,
UAE, Desalination
,
93
(
1993
):
111
–
118
28.
http://www.aspentech.com/
29.
I.G.Rice, Steam-injected gas turbine analysis: Part I—Steam rates; Part II—Steam cycle efficiency; Part III—Steam regenerated heat, ASME paper No. 93-GT-132; 93-GT-420; 93-GT-420
30.
Chiesa
 
P.
,
Lozza
 
G.
,
Consonni
 
S.
,
An assessment of the thermodynamic performance of mixed gas-steam cycles, Part A: Intercooled and steam-injected cycle; part B: Water-injected and HAT cycles
,
ASME Journal of Engineering for Gas Turbines and Power
,
117
(
1995
):
489
–
498
31.
Bartlett
 
M. A.
,
Westermark
 
M. O.
,
A study of humidified gas turbine for short-term realization in midsized power generation, part I: Nonintercooled cycle analysis
,
ASME Journal of Engineering for Gas Turbines and Power
,
127
(
2005
):
91
–
99
32.
Wade
 
N. M.
,
Energy and cost allocation in dual-purpose power and desalination plants
,
Desalination
,
123
(
1999
):
115
–
125
33.
Al-Sofi
 
M. A. K.
,
Srouji
 
M. M.
,
Fuel allocation in dual-purpose plants
,
Desalination
100
(
1995
):
65
–
70
This content is only available via PDF.
Copyright © 2005
 by ASME
You do not currently have access to this content.