In this paper, a novel industrial waste heat recovery based cogeneration is proposed for the combined production of power and refrigeration. The system is an integration of Rankine power cycle and absorption refrigeration cycle. A thermodynamic analysis through energy and exergy is employed, and a comprehensive parametric study is performed to investigate the effects of exhaust gas inlet temperature, pinch-point, and gas composition on energy efficiency, power-to-cold ratio, and exergy efficiency of the cogeneration cycle and exergy destruction in each component. The variation in specific heat with exhaust gas composition and temperature is accounted in the analysis for further discussion. The first-law efficiency decreases while power-to-cold ratio and exergy efficiency increase with increasing exhaust gas inlet temperature. The parameters, such as power-to-cold ratio and second-law efficiency, decrease while first-law efficiency increases with increasing pinch-point. Exergy efficiency significantly varies with gas composition and oxygen content of the exhaust gas. Approximating the exhaust gas as air, and the air standard analysis leads to either underestimation or overestimation of cogeneration cycle performance on exergy point of view. Exergy analysis indicates that maximum exergy is destroyed during the steam generation process; which represents around 40% of the total exergy destruction in the overall system. The exergy destruction in each component of the system varies significantly with exhaust gas inlet temperature and pinch-point. The present analysis contributes further information on the role of composition, exhaust gas temperature, and pinch-point influence on the performance of a waste heat recovery based cogeneration system from an exergy point of view.

1.
Boycle
,
M. P.
, 2002,
Handbook for Cogeneration and Combined Cycle Power Plants
,
ASME
,
New York
.
2.
Khaliq
,
A.
, and
Kaushik
,
S. C.
, 2004, “
Thermodynamic Performance Evaluation of Combustion Gas Turbine Cogeneration System With Reheat
,”
Appl. Therm. Eng.
1359-4311,
24
, pp.
1785
1795
.
3.
Oh
,
S. D.
,
Pang
,
H. S.
,
Kim
,
S. M.
, and
Kwak
,
H. Y.
, 1996, “
Exergy Analysis for a Gas Turbine Cogeneration System
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
118
, pp.
782
791
.
4.
Khaliq
,
A.
, and
Choudhary
,
K.
, 2007, “
Combined First and Exergy Analysis of Gas Turbine Cogeneration System With Inlet Air Cooling and Evaporative After Cooling of the Compressor Discharge
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
129
, pp.
1004
1012
.
5.
Goswami
,
D. Y.
, 1995, “
Solar Thermal Power-Status of Technologies and Opportunities for Research
,”
Proceedings of the Second ISHMT-ASME Heat and Mass Transfer Conference
,
Tata McGraw-Hill
,
New Delhi, India
, Vol.
27
, pp.
57
60
.
6.
Goswami
,
D. Y.
, 1998, “
Solar Thermal Power Technology: Present Status and Ideas for the Future
,”
Energy Sources
0090-8312,
20
, pp.
137
145
.
7.
Xu
,
F.
,
Goswami
,
D. Y.
, and
Bhagwat
,
S. S.
, 2000, “
A Combined Power/Cooling Cycle
,”
Energy
0360-5442,
25
, pp.
233
246
.
8.
Hasan
,
A. A.
,
Goswami
,
D. Y.
, and
Vijayaraghavan
,
S.
, 2002, “
First and Second Law Analysis of a New Power and Refrigeration Thermodynamic Cycle Using a Solar Heat Sources
,”
Sol. Energy
0038-092X,
73
(
5
), pp.
385
393
.
9.
Tamm
,
G.
,
Goswami
,
D. Y.
,
Lu
,
S.
, and
Hasan
,
A. A.
, 2003, “
A Novel Combined Power and Cooling Cycle for Low Temperature Heat Sources-Part I: Theoretical Investigations
,”
ASME J. Sol. Energy Eng.
0199-6231,
125
(
2
), pp.
218
222
.
10.
Liu
,
M.
,
Zhang
,
N.
, and
Cai
,
R. X.
, 2006, “
A Series Connected Ammonia Absorption Power/Cooling Combined Cycle
,”
J. Eng. Thermophys.
,
27
(
1
), pp.
9
12
.
11.
Liu
,
M.
, and
Zhang
,
N.
, 2007, “
Proposal and Analysis of Noval Ammonia-Water Cycle for Power and Refrigeration and Cogeneration
,”
Energy
0360-5442,
32
, pp.
961
970
.
12.
Nag
,
P. K.
, and
De
,
S.
, 1997, “
Design and Operation of a Heat Recovery Steam Generation With Minimum Irreversibility
,”
Appl. Therm. Eng.
1359-4311,
17
, pp.
385
391
.
13.
Butcher
,
C. J.
, and
Reddy
,
B. V.
, 2007, “
Second Law Analysis of a Waste Heat Recovery Based Power Generation System
,”
Int. J. Heat Mass Transfer
0017-9310,
50
, pp.
2355
2363
.
14.
Reddy
,
B. V.
,
Ramkiran
,
G.
,
Kumar
,
K. A.
, and
Nag
,
P. K.
, 2002, “
Second Law Analysis of a Waste Heat Recovery Steam Generator
,”
Int. J. Heat Mass Transfer
0017-9310,
45
, pp.
1807
1814
.
15.
Wall
,
G.
, 2003, “
Exergy Tools
,”
Proc. Inst. Mech. Eng., Part A
0957-6509,
217
, pp.
125
136
.
16.
Khaliq
,
A.
, and
Kumar
,
R.
, 2008, “
Exergy Analysis of Double Effect Vapor Absorption Refrigeration System
,”
Int. J. Energy Res.
0363-907X,
32
, pp.
161
174
.
17.
Moran
,
M. J.
, and
Shapiro
,
H. N.
, 2008,
Fundamentals of Engineering Thermodynamics
,
6th ed.
,
Wiley
,
New York
, Chap. 3.
18.
Chua
,
H. T.
,
Toh
,
H. K.
,
Malek
,
A.
,
Ng
,
K. C.
, and
Srinivasan
,
K.
, 2000, “
Improved Thermodynamic Property Fields of LiBr–H2O
Solutions,”
Int. J. Refrig.
0140-7007,
23
, pp.
412
429
.
19.
Bejan
,
A.
, 2002, “
“Fundamentals of Exergy Analysis,” Entropy Generation Minimization, and the Generation of Flow Architecture
,”
Int. J. Energy Res.
0363-907X,
26
, pp.
545
565
.
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