In the present work, liquefied petroleum gas (LPG) is premixed with air for combustion in a compression ignition engine, along with neat rubber seed oil as the direct injected fuel. The LPG is injected directly into the intake manifold using an electronic gas injector. The variation in the LPG flow rate is from zero to the maximum tolerable value. The engine load was varied from no load to full load at regular intervals of 25% of full load. Experimental results indicate a reduction in thermal efficiency at low loads, followed by a small improvement in the thermal efficiency at 75% and 100% loads. Premixing of LPG prolongs the delay in the ignition with a simultaneous decrease in the duration of combustion. With an increase in the LPG flow rate, the maximum in-cylinder pressure increased at high outputs, whereas it decreased at low outputs. The heat release rate shows that the combustion rate increases with LPG induction. Carbon monoxide (CO) and hydrocarbon (HC) levels reduced at high outputs, whereas at all loads, the oxides of nitrogen (NOx) levels increased. The NOx level at full load increased from 6.9 g/kWh at no LPG induction to 10.36 g/kWh at 47.63% LPG induction. At all loads, the smoke level decreased drastically. The smoke level at full load decreased from 6.1BSU at no LPG induction to 3.9BSU at 47.63% LPG induction.

References

1.
Guo
,
Z.
,
Guo
,
H.
, and
Zeng
,
Q.
,
2018
, “
Investigation on Di-(2-Methoxypropyl) Carbonate Used as a Clean Oxygenated Fuel for Diesel Engine
,”
ASME J. Energy Resour. Technol.
,
140
(
1
), p.
012201
.
2.
Yadav
,
J.
, and
Ramesh
,
A.
,
2018
, “
Comparison of Single and Multiple Injection Strategies in a Butanol Diesel Dual Fuel Engine
,”
ASME J. Energy Resour. Technol.
,
140
(
7
), p.
072206
.
3.
Patil
,
V. V.
, and
Patil
,
R. S.
,
2018
, “
Investigations on Partial Addition of n-Butanol in Sunflower Oil Methyl Ester Powered Diesel Engine
,”
ASME J. Energy Resour. Technol.
,
140
(
1
), p.
012205
.
4.
Cubio
,
G. M.
,
Capareda
,
S. C.
, and
Alagao
,
F. B.
,
2014
, “
Real-Time Analysis of Engine Power, Thermal Efficiency, and Emission Characteristics Using Refined and Transesterified Waste Vegetable Oil
,”
ASME J. Energy Resour. Technol.
,
136
(
3
), p.
032201
.
5.
Subramanian
,
T.
,
Varuvel
,
E. G.
,
Martin
,
L. J.
, and
Nagalingam
,
B.
,
2016
, “
Effects of low Carbon Bio Fuel Blends With Karanja oil Methyl Ester in a Single Cylinder CI Engine on CO2 Emission and Other Performance and Emission Characteristics
,”
Nat. Environ. Pollut. Technol.
,
15
(
4
), pp.
1249
1256
.
6.
Ziejewski
,
M.
,
Goettier
,
H.
, and
Pratt
,
G. L.
,
1986
, “
Influence of Vegetable Oil Based Alternate Fuels on Residue Deposits and Components Wear in a Diesel Engine
,”
SAE Technical Paper Series
860302
.
7.
Sahoo
,
P. K.
, and
Das
,
L. M.
,
2009
, “
Combustion Analysis of Jatropha, Karanja and Polanga Based Biodiesel as Fuel in a Diesel Engine
,”
Fuel
,
88
(
6
), pp.
994
999
.
8.
Altın
,
R.
,
Çetinkaya
,
S.
, and
Yücesu
,
H. S.
,
2001
, “
The Potential of Using Vegetable oil Fuels as Fuel for Diesel Engines
,”
Energy Convers. Manage.
,
42
(
5
), pp.
529
538
.
9.
Bose
,
P. K.
, and
Banerjee
,
R.
,
2012
, “
An Experimental Investigation on the Role of Hydrogen in the Emission Reduction and Performance Trade-Off Studies in an Existing Diesel Engine Operating in Dual Fuel Mode Under Exhaust Gas Recirculation
,”
ASME J. Energy Resour. Technol.
,
134
(
1
), p.
012601
.
10.
Masimalai
,
S. K.
, and
Nandagopal
,
S.
,
2016
, “
Combined Effect of Oxygen Enrichment and Dual Fueling on the Performance Behavior of a CI Engine Fueled With Pyro Oil–Diesel Blend as Fuel
,”
ASME J. Energy Resour. Technol.
,
138
(
1
), p.
032206
.
11.
Zhang
,
Z. H.
,
Tsang
,
K. S.
,
Cheung
,
C. S.
,
Chan
,
T. L.
, and
Yao
,
C. D.
,
2011
, “
Effect of Fumigation Methanol and Ethanol on the Gaseous and Particulate Emissions of a Direct-Injection Diesel Engine
,”
Atmos. Environ.
,
45
, pp.
2001
2008
.
12.
Edwin Geo
,
V.
,
Nagarajan
,
G.
,
Kamalakannan
,
J.
, and
Nagalingam
,
B.
,
2009
, “
Experimental Investigations To Study the Characteristics of Rubber-Seed-Oil-Fueled Diesel Engine Supplemented With Diethyl Ether
,”
Energy Fuels
,
23
, pp.
533
538
.
13.
Lim
,
O.
,
Iida
,
N.
,
Cho
,
G.
, and
Narankhuu
,
J.
,
2012
, “
The Research About Engine Optimization and Emission Characteristic of Dual Fuel Engine Fueled With Natural Gas and Diesel
,”
SAE
Technical Paper No. 2012-32-0008.
14.
Ashok
,
B.
,
Denis Ashok
,
C.
, and
Ramesh Kumar
,
C.
,
2015
, “
LPG Diesel Dual Fuel Engine—a Critical Review
,”
Alexandria Eng. J.
,
54
, pp.
105
126
.
15.
Poonia
,
M. P.
,
Ramesh
,
A.
, and
Gaur
,
R. R.
,
1999
, “
Experimental Investigation of the Factors Affecting the Performance of a LPG-Diesel Dual Fuel Engine
,”
SAE
Technical Paper No. 1999-01-1123.
16.
Lata
,
D. B.
,
Misra
,
A.
, and
Medhekar
,
S.
,
2012
, “
Effect of Hydrogen and LPG Addition on the Efficiency and Emissions of a Dual Fuel Diesel Engine
,”
Int. J. Hydrogen Energy
,
37
, pp.
6084
6096
.
17.
Lata
,
D. B.
,
Misra
,
A.
, and
Medhekar
,
S.
,
2011
, “
Investigations on the Combustion Parameters of a Dual Fuel Diesel Engine With Hydrogen and LPG as Secondary Fuels
,”
Int. J. Hydrogen Energy
,
36
, pp.
13808
13819
.
18.
Tira
,
H. S.
,
Herreros
,
J. M.
,
Tsolakis
,
A.
, and
Wyszynski
,
M. L.
,
2012
, “
Characteristics of LPG-Diesel Dual Fuelled Engine Operated With Rapeseed Methyl Ester and Gas-to-Liquid Diesel Fuels
,”
Energy
,
47
, pp.
620
629
.
19.
Mohanan
,
P.
, and
Suresh Kumar
,
Y.
,
2001
, “
Effect of LPG Intake Temperature, Pilot Fuel and Injection Timing on the Combustion Characteristics & Emission of a LPG Diesel Dual Fuel Engine
,”
SAE
Paper No. 2001-28-0028.
20.
Cernat
,
A.
,
Pana
,
C.
,
Negurescu
,
N.
, and
Nutu
,
C.
,
2016
, “
The Influence of LPG Fuelling on Diesel Engine Cyclic Variability
,”
Procedia Technol.
,
22
, pp.
746
753
.
21.
Reddy
,
J. N.
, and
Ramesh
,
A.
,
2006
, “
Parametric Studies From Improving the Performance of a Jatropha Oil-Fuelled Compression Ignition Engine
,”
Renewable Energy
,
31
, pp.
1994
2016
.
22.
Devan
,
P. K.
, and
Mahalakshmi
,
N. V.
,
2009
, “
Study of the Performance, Emission and Combustion Characteristics of a Diesel Engine Using Poon oil-Based Fuels
,”
Fuel Process. Technol.
,
90
(
4
), pp.
513
519
.
23.
Agarwal
,
D.
, and
Agarwal
,
A. K.
,
2007
, “
Performance and Emissions Characteristics of Jatropha oil (Preheated and Blends) in a Direct Injection Compression Ignition Engine
,”
Appl. Therm. Eng.
,
27
, pp.
2314
2323
.
24.
Haldar
,
S. K.
,
Ghosh
,
B. B.
, and
Nag
,
A.
,
2009
, “
Studies on the Comparison of Performance and Emission Characteristics of a Diesel Engine Using Three Degummed Non-Edible Vegetable Oils
,”
Biomass Bioenergy
,
33
(
8
), pp.
1013
1018
.
25.
Edwin Geo
,
V.
,
Nagarjan
,
G.
, and
Nagalingam
,
B.
,
2011
, “
Experimental Study on the Performance, Emission and Combustion Characteristics of Rubber Seed oil-Diesel Blends in a DI Diesel Engine
,”
Int. J. Renew. Energy Technol.
,
2
(
3
), pp.
306
323
.
26.
Gunea
,
C.
,
Razavi
,
M. R. M.
, and
Karim
,
G. A.
,
1998
. “
The Effects of Pilot Fuel Quality on Dual Fuel Engine Ignition Delay
,”
SAE
Technical Paper No. 982453.
27.
Jian
,
D.
,
Xiaohong
,
G.
,
Gesheng
,
L.
, and
Xintang
,
Z.
,
2001
. “
Study on Diesel–LPG Dual Fuel Engines
,”
SAE
Technical Paper No. 2001-01-3679.
28.
Saleh
,
H. E.
,
2008
, “
Effect of Variation in LPG Composition on Emissions and Performance in a Dual Fuel Diesel Engine
,”
Fuel
,
87
, pp.
3031
3039
.
29.
Saravanan
,
N.
, and
Nagarajan
,
G.
,
2009
, “
An Insight on Hydrogen Fuel Injection Techniques with SCR System for NOx Reduction in a Hydrogen-Diesel Dual Fuel Engine
,”
Int. J. Hydrogen Energy
,
34
, pp.
9019
9032
.
30.
Miller Jothi
,
N. K.
,
Nagarajan
,
G.
, and
Renganarayanan
,
S.
,
2007
, “
Experimental Studies on Homogeneous Charge CI Engine Fueled With LPG Using DEE as an Ignition Enhancer
,”
Renewable Energy
,
32
, pp.
1581
1593
.
31.
Mohamed Selim
,
Y. E.
,
2004
, “
Sensitivity of Dual Fuel Engine Combustion and Knocking Limits to Gaseous Fuel Composition
,”
Energy Convers. Manage.
,
45
, pp.
411
425
.
32.
Wattanavichien
,
K.
,
2011
, “
Visualization of LPG-PME Dual Fuel Combustion in an IDI CI Engine
,”
Proceedings of the Second TSME International Conference on Mechanical Engineering
,
Krabi, Thailand
,
Oct. 19–21
, Paper No. AEC19.
33.
Stewart
,
J.
,
Clarke
,
A.
, and
Chen
,
R.
,
2007
, “
An Experimental Study of the Dual-Fuel Performance of a Small Compression Ignition Diesel Engine Operating With Three Gaseous Fuels
,”
J. Automobile Eng., Part: D
,
221
(
8
), pp.
943
956
.
34.
Goldsworthy
,
L.
,
2012
, “
Combustion Behavior of a Heavy Duty Common Rail Marine Diesel Engine Fumigated With Propane
,”
Exp. Therm. Fluid Sci.
,
42
, pp.
93
106
.
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