Thermodynamic analysis of double effect parallel and series flow direct fired absorption systems with lithium bromide–water has been carried out for different operating conditions. Temperatures in primary generator (Tg) and secondary generator (Tgs)/secondary condenser (Tcs) are optimized analytically using an iterative technique for maximum coefficient of performance (COP) and minimum energy required. A solution distribution ratio for a parallel flow cycle is also optimized. Source of energy used to drive the cycles is considered as compressed natural gas (CNG) and liquefied petroleum gas (LPG). Exergy destruction rate (EDR) in individual components as well as in the whole cycle along with volume flow rate of LPG and CNG is presented and compared. Results show that maximum COP for the parallel flow cycle is 3–6% higher than the series flow cycle. Also, minimum EDR of the parallel flow cycle is around 4% less while energy consumption is 2–3% low as compared to the series flow cycle.

References

References
1.
Grossman
,
G.
,
Zaltash
,
A.
, and
DeVault
,
R. C.
,
1995
, “
Simulation and Performance Analysis of a 4-Effect Lithium Bromide-Water Absorption Chiller
,”
ASHRAE Trans.
,
101
(
1
), p.
1302e12
.
2.
Azhar
,
M.
, and
Siddiqui
,
M. A.
,
2017
, “
Optimization of Operating Temperatures in the Gas Operated Single to Triple Effect Vapour Absorption Refrigeration Cycles
,”
Int. J. Refrig.
,
82
, pp.
401
425
.
3.
Azhar
,
M.
, and
Siddiqui
,
M. A.
,
2017
, “
Energy and Exergy Analyses for Optimization of the Operating Temperatures in Double Effect Absorption Cycle
,”
Energy Procedia
,
109
, pp.
211
218
.
4.
Azhar
,
M.
, and
Siddiqui
,
M. A.
,
2019
, “
Exergy Analysis of Single to Triple Effect Lithium Bromide–Water Vapour Absorption Cycles and Optimization of the Operating Parameters
,”
Energy Convers. Manage.
,
180
, pp.
1225
1246
.
5.
Misra
,
R. D.
,
Sahoo
,
P. K.
, and
Gupta
,
A.
,
2005
, “
Thermoeconomic Optimization of a LiBr/H2O Absorption Chiller Using Structural Method
,”
ASME J. Energy Resour. Technol.
,
127
(
2
), pp.
119
124
.
6.
Takalkar
,
G. D.
,
Bhosale
,
R. R.
,
Mali
,
N. A.
, and
Bhagwat
,
S. S.
,
2019
, “
Thermodynamic Analysis of EMISE–Water as a Working Pair for Absorption Refrigeration System
,”
Appl. Therm. Eng.
,
148
, pp.
787
795
.
7.
Merkel
,
N.
,
Bücherl
,
M.
,
Zimmermann
,
M.
,
Wagner
,
V.
, and
Schaber
,
K.
,
2018
, “
Operation of an Absorption Heat Transformer Using Water/Ionic Liquid as Working Fluid
,”
Appl. Therm. Eng.
,
131
, pp.
370
380
.
8.
Siddiqui
,
M. A.
,
1991
, “
Optimal Cooling and Heating Performance Coefficients of Four Biogas Powered Absorption Systems
,”
Energy Convers. Manag.
,
31
, pp.
39
49
.
9.
Siddiqui
,
M. A.
,
1987
, “
Economic Analysis of Biogas for Optimum Generator Temperature of Four Vapour Absorption Systems
,”
Energy Convers. Manag.
,
27
(
2
), pp.
163
169
.
10.
Siddiqui
,
M. A.
,
1993
, “
Optimum Generator Temperatures in Four Absorption Cycles Using Different Sources of Energy
,”
Energy Convers. Manag.
,
34
(
4
), pp.
251
266
.
11.
Pandya
,
B.
,
Kumar
,
V.
,
Patel
,
J.
, and
Matawala
,
V. K.
,
2018
, “
Optimum Heat Source Temperature and Performance Comparison of LiCl–H2O and LiBr–H2O Type Solar Cooling System
,”
ASME J. Energy Resour. Technol.
,
140
(
5
), p.
051204
.
12.
Bellos
,
E.
,
Tzivanidis
,
C.
,
Pavlovic
,
S.
, and
Stefanovic
,
V.
,
2017
, “
Thermodynamic Investigation of LiCl–H2O Working Pair in a Double Effect Absorption Chiller Driven by Parabolic Trough Collectors
,”
Therm. Sci. Eng. Prog.
,
3
, pp.
75
87
.
13.
Kim
,
J. S.
,
Park
,
Y.
, and
Lee
,
H.
,
1999
, “
Performance Evaluation of Absorption Chiller Using LiBr + H2N(CH2)2OH + H2O, LiBr + HO(CH2)3OH + H2O, and LiBr + (HOCH2CH2)2NH + H2O as Working fluids
,”
Appl. Therm. Eng.
,
19
(
2
), pp.
217
225
.
14.
Saravanan
,
R.
, and
Maiya
,
M.
,
1998
, “
Thermodynamic Comparison of Water-Based Working Fluid Combinations for a Vapour Absorption Refrigeration System
,”
Appl. Therm. Eng.
,
18
(
7
), pp.
553
568
.
15.
Arun
,
M. B.
,
Maiya
,
M. P.
, and
Murthy
,
S. S.
,
2001
, “
Performance Comparison of Double-Effect Parallel-Flow and Series Flow Water-Lithium Bromide Absorption Systems
,”
Appl. Therm. Eng.
,
21
(
12
), pp.
1273
1279
.
16.
Xu
,
G. P.
, and
Dai
,
Y. Q.
,
1997
, “
Theoretical Analysis and Optimization of a Double-Effect Parallel-Flow-Type Absorption Chiller
,”
Appl. Therm. Eng.
,
17
(
2
), pp.
157
170
.
17.
Oh
,
M. D.
,
Kim
,
S. C.
,
Kim
,
Y. L.
, and
Kim
,
Y. I.
,
1994
, “
Cycle Analysis of an Air-Cooled LiBr/H2O Absorption Heat Pump of Parallel-Flow Type
,”
Int. J. Refrig.
,
17
(
8
), pp.
555
565
.
18.
Riffat
,
S. B.
, and
Shankland
,
N.
,
1993
, “
Integration of Absorption and Vapour-Compression Systems
,”
Appl. Energy
,
46
(
4
), pp.
303
316
.
19.
Arora
,
A.
,
Dixit
,
M.
, and
Kaushik
,
S. C.
,
2016
, “
Energy and Exergy Analysis of a Double Effect Parallel Flow LiBr/H2O Absorption Refrigeration System
,”
J. Therm. Eng.
,,
2
(
1
), pp.
541
549
. 10.18186/jte.63682
20.
Konwar
,
D.
, and
Gogoi
,
T. K.
,
2018
, “
Performance of Double Effect H2O–LiCl Absorption Refrigeration Systems and Comparison with H2O–LiBr Systems, Part 1: Energy Analysis
,”
Therm. Sci. Eng. Prog.
,
8
, pp.
184
203
.
21.
Cengel
,
Y. A.
, and
Boles
,
M. A.
,
2015
, Thermodynamics: An Engineering Approach,
8th
ed.,
McGraw-Hill Education
,
New York
.
22.
Siddiqui
,
M. A.
,
1992
, “
Optimization of Operating Parameters for Various Absorption Systems Using Renewable Energies
,”
Ph.D. thesis
,
Aligarh Muslim University
,
Aligarh
.
23.
Pátek
,
J.
, and
Klomfar
,
J.
,
2006
, “
A Computationally Effective Formulation of the Thermodynamic Properties of LiBr–H2O Solutions From 273 to 500 K Over Full Composition Range
,”
Int. J. Refrig.
,
29
(
4
), pp.
566
578
.
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