Abstract

This article compares the dynamic behavior of solar-assisted novel salt-based ammonia/sodium thiocyanate (NH3 + NaSCN) and ammonia/lithium nitrate (NH3 + LiNO3) single-effect absorption refrigeration cycles. An evacuated tube collector (ETC) is attached with fully mixed hot water storage tank to power the absorption system. Variations in ambient conditions are determined for Gujarat Region of India and their effects on absorption cycles are quantified throughout the days for the months of April to September. System performance is investigated and compared on terms of coefficient of performance (COP), refrigeration capacity, efficiency and solar COP (SCOP). At same operating conditions, it is found that the NH3 + LiNO3 cycle can achieve much lower evaporator temperature (−13.1 °C) then NH3 + NaSCN cycle (−7.5 °C) and maximum possible COP for NH3 + NaSCN cycle is 0.73 and 0.68 for NH3 + LiNO3 cycle. The working limit of NH3 + LiNO3 cycle is wide ranging and narrow for NH3 + NaSCN cycle due to high crystallization possibility. SCOP varies from 0.18 to 0.43 for NH3 + NaSCN cycle and 0.17 to 0.39 for NH3 + LiNO3 cycle over the period of 6 months. Based on these findings, the suitable working cycle is justified.

References

1.
Pandya
,
B.
,
Modi
,
N.
,
Kumar
,
V.
,
Upadhyai
,
R.
, and
Patel
,
J.
,
2018
, “
Performance Comparison and Optimal Parameters Evaluation of Solar-Assisted NH3–NaSCN and NH3–LiNO3 Type Absorption Cooling System
,”
J. Therm. Anal. Calorim.
,
135
(
6
), pp.
1
15
.
2.
Modi
,
N.
,
Pandya
,
B.
, and
Patel
,
J.
,
2019
, “
Comparative Analysis of a Solar-Driven Novel Salt-Based Absorption Chiller With the Implementation of Nanoparticles
,”
Int. J. Energy Res.
,
43
(
4
), pp.
1
15
.
3.
Elsafty
,
A.
, and
Al-Daini
,
A. J.
,
2002
, “
Economical Comparison Between a Solar-Powered Vapour Absorption Air-Conditioning System and a Vapour Compression System in the Middle East
,”
Renewable Energy
,
25
(
4
), pp.
569
583
. 10.1016/S0960-1481(01)00078-7
4.
Sun
,
D.-W.
,
1998
, “
Comparison of the Performances of NH3-H2O, NH3-LiNO3 and NH3-NaSCN Absorption Refrigeration Systems
,”
Energy Convers. Manag.
,
39
(
5–6
), pp.
357
368
. 10.1016/S0196-8904(97)00027-7
5.
Assilzadeh
,
F.
,
Kalogirou
,
S. A.
,
Ali
,
Y.
, and
Sopian
,
K.
,
2005
, “
Simulation and Optimization of a LiBr Solar Absorption Cooling System With Evacuated Tube Collectors
,”
Renewable Energy
,
30
(
8
), pp.
1143
1159
. 10.1016/j.renene.2004.09.017
6.
Abdulateef
,
J. M.
,
Sopian
,
K.
, and
Alghoul
,
M. A.
,
2008
, “
Optimum Design for Solar Absorption Refrigeration Systems and Comparison of the Performances Using Ammonia-Water, Ammonia-Lithium Nitrate and Ammonia-Sodium Thiocyanate Solutions
,”
Int. J. Mech. Mater. Eng.
,
3
(
1
), pp.
17
24
.
7.
National Fire Protection Association
,
2017
, “
NFPA 704, Standard System for the Identification of the Hazards of Materials for Emergency Response
.”
8.
Farshi
,
L. G.
,
Infante Ferreira
,
C. A.
,
Mahmoudi
,
S. M. S.
, and
Rosen
,
M. A.
,
2014
, “
First and Second law Analysis of Ammonia/Salt Absorption Refrigeration Systems
,”
Int. J. Refrig.
,
40
, pp.
111
121
. 10.1016/j.ijrefrig.2013.11.006
9.
Cai
,
D.
,
He
,
G.
,
Tian
,
Q.
,
Bian
,
Y.
,
Xiao
,
R.
, and
Zhang
,
A.
,
2015
, “
First Law Analysis of a Novel Double Effect Air-Cooled Non-Adiabatic Ammonia/Salt Absorption Refrigeration Cycle
,”
Energy Convers. Manag.
,
98
, pp.
1
14
. 10.1016/j.enconman.2015.03.083
10.
Sokhansefat
,
T.
,
Mohammadi
,
D.
,
Kasaeian
,
A.
, and
Mahmoudi
,
A. R.
,
2017
, “
Simulation and Parametric Study of a 5-Ton Solar Absorption Cooling System in Tehran
,”
Energy Convers. Manag.
,
148
, pp.
339
351
. 10.1016/j.enconman.2017.05.070
11.
Bellos
,
E.
,
Tzivanidis
,
C.
,
Symeou
,
C.
, and
Antonopoulos
,
K. A.
,
2017
, “
Energetic, Exergetic and Financial Evaluation of a Solar Driven Absorption Chiller—A Dynamic Approach
,”
Energy Convers. Manag.
,
137
, pp.
34
48
. 10.1016/j.enconman.2017.01.041
12.
Duffie
,
W. M.
,
Beckman
,
J. A.
, and
Worek
,
W. A.
,
2013
,
Solar Engineering of Thermal Processes
, 4th ed.,
Wiley
,
New York
.
13.
Pandya
,
B.
,
Kumar
,
V.
,
Matawala
,
V.
, and
Patel
,
J.
,
2018
, “
Thermal Comparison and Multi-Objective Optimization of Single-Stage Aqua-Ammonia Absorption Cooling System Powered by Different Solar Collectors
,”
J. Therm. Anal. Calorim.
,
133
(
3
), pp.
1635
1648
. 10.1007/s10973-018-7193-z
14.
Klein
,
F.
, and
Alvarda
,
S. A.
,
2007
, “
Engineering Equation Solver (EES)
,”
F-Chart Software
,
WI
.
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