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Article

Effect of Parameters Behavior of Simarouba Methyl Ester Operated Diesel Engine

by
Keerthi Kumar N.
1,
N. R. Banapurmath
2,
T. K. Chandrashekar
3,
Jatadhara G. S.
4,
Manzoore Elahi M. Soudagar
5,
Ali E. Anqi
6,
M. A. Mujtaba
7,
Marjan Goodarzi
8,9,10,*,
Ashraf Elfasakhany
11,
Md Irfanul Haque Siddiqui
12 and
Masood Ashraf Ali
13
1
Department of Mechanical Engineering, BMS Institute of Technology and Management, Yelahanka 560064, India
2
Department of Mechanical Engineering, BVB College of Engineering and Technology, BVB College Campus, KLE Technological University, Hubli 580021, India
3
Department of Mechanical Engineering, RNS Institute of Technology, Channasandra 560098, India
4
Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur 572103, India
5
Department of Mechanical Engineering, School of Technology, Glocal University, Delhi-Yamunotri Marg, SH-57, Mirzapur Pole, Saharanpur 247121, India
6
Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
7
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
8
Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
9
Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80259, Jeddah 21589, Saudi Arabia
10
Mechanical Engineering Department, Lamar University, Beaumont, TX 77706, USA
11
Mechanical Engineering Department, College of Engineering, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
12
Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11451, Saudi Arabia
13
Department of Mechanical Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Al Kharj 16273, Saudi Arabia
*
Author to whom correspondence should be addressed.
Energies 2021, 14(16), 4973; https://doi.org/10.3390/en14164973
Submission received: 26 June 2021 / Revised: 4 August 2021 / Accepted: 9 August 2021 / Published: 13 August 2021

Abstract

:
Being an energy source of another origin, the compression ignition (CI) engine’s typical design parameters might not suit Simarouba oil methyl ester (SuOME). Present experimental investigation targets are determining the effects of engine design parameters, including fuel injection pressure and nozzle geometry, on the engine, concerning performance and emissions such as carbon monoxide (CO), unburnt hydrocarbon (HC), oxides of nitrogen (NOx), and smoke opacity, with SuOME as fuel. Comparisons of brake thermal efficiency (BTE) and different emissions from the engine tailpipe were performed for different fuel injection pressures and a number of injector holes and diameter of orifices were opened in the injector to find the optimum combination to run the engine with SuOME. It was observed that the combined effect of an increase in injection pressure of 240 bar from 205 bar, and increasing number of injector holes from three to six with reduced injector hole diameters from 0.2 to 0.3 mm, recorded higher brake thermal efficiency with reduced emission levels for the SuOME mode of operation compared to the baseline standard operation with SuOME. For 240 bar compared to 205 bar of injection pressure (IP) for SuOME, the BTE increased by 2.35% and smoke opacity reduced by 1.45%. For six-hole fuel injectors compared to three-hole injectors, the BTE increased by 3.19%, HC reduced by 9.5%, and CO reduced by 14.7%. At 240 bar IP, with the six-hole injector having a 0.2 mm hole diameter compared to the 0.3 mm hole diameter, the BTE increased by 5%, HC reduced by 5.26%, CO reduced by 25.61%, smoke reduced by 10%, while NOx increased marginally by 0.27%. Hence, the six-hole FI, 240 IP, 0.2 mm FI diameter holes are suitable for diesel engine operation fueled by Simarouba biodiesel.

Graphical Abstract

1. Introduction

An increase in global warming in the past few decades is mainly due to the exhaustive use of fossil fuel resources for human beings’ comfort [1,2,3,4,5]. The application of CI engines is increasing daily in many sectors and contributes to generating electricity and transport [6,7,8]. This increased engine usage is becoming a significant problem worldwide regarding the shortfall of fossil fuel resources and pollutions [9]. Therefore, many researchers are focusing on a substitute fuel for diesel to run the engine [10,11]. Biodiesel, an oxygenated fuel produced from seeds, is considered a suitable substitute for diesel due to its similar chemical properties to diesel, and its renewability [12,13]. However, Jatropha, Mahua, Honge, Honne, Simarouba, Nigella sativa, and cottonseed are a few seeds with higher oil contents readily available in India [11,14,15,16,17]. Most of the studies revealed that the use of biodiesel directly into the engine is not suitable due to their higher viscosity or lower heating capabilities [8,18,19].
An increase in performance can be obtained by blending biodiesel with diesel without modifying the engine parameters up to a certain percentage; as the percentage of blend increases, a reduction in the engine’s performance is observed [20,21,22,23]. Significant modification in the engine is required if the engine is run by complete biodiesel due to its higher viscosity [13,16,24]. Hence, modification in engine parameters to the optimized values is suggested to run the engine operating with biodiesel. The driving forces for engine performance are engine performance, engine parameters such as fuel injection pressure, timing, the number of holes in the fuel injector, injector hole size, the compression ratio, and the combustion chamber profile. Using 20% of Jatropha and coconut biodiesel in diesel recorded an increased brake thermal efficiency of 2.6 and 1.3% compared to diesel operating with an injection pressure of 240 bar [25]. Using the same injection pressure of 240 bar increased thermal efficiency with reduced specific fuel consumption. Emissions such as CO, HC, smoke, and NOx were observed in the engine using neem methyl ester as fuel [26]. By varying the IT and injection pressure, similar trends have increased NOx emissions [27]. This trend is due to the reduction in fuel droplets’ size by 60% when injected at 240 bar compared to the injection pressure of 205 bar [28]. A higher BTE with a reduction in all emissions is obtained for engine operation of 275 bar at fuel injection timing of 21° bTDC (before Top Dead Center) [29]. Increasing injection pressure more than the engine standards provides a higher spray velocity and may give rise to the problem of wall hitting. Hence, it is essential to control the fuel spray and penetration to reduce emissions [30]. More than 280 bar did not show improved results for gasoline fuel [31]. An investigation on injection pressures between 5 and 60 MPa using five holes has been performed, and found improvements in atomization, and hence combustion, at an injection pressure of 20 MPa; a further increase in injection pressure resulted in an only small increase in efficiency [32]. Among many nonedible seed oils, oil produced from Simarouba seeds was also considered the best alternative for diesel.
Simarouba glauca, popularly known as Laxmitaru and Maruba in its origin of Central America, has a great potential to lower the demand for importing diesel [1,2]. Later, the Simarouba glauca plant was also found in the wasteland of Karnataka, Tamil Nadu, Gujarat, Orissa, and Maharashtra, where its leaves were used as medicines for cancer and its seeds for producing biodiesel, and its tree can be used as crafting wood. India’s national oilseeds and vegetable oil development board has reported Simarouba glauca contains 0.06% of FFA (Free fatty acid) with sustainability up to half a year [33,34]. Biodiesel from Simarouba glauca oil can be obtained from the transesterification process using KOH as the catalyst and methanol as alcohol [35,36]. Using direct SuOME led to a reduction in emission levels, although a massive compromise in terms of SFC (Specific Fuel Consumption) and power output and life of injector lines. To overcome this, many researchers adopted the concept of modification in fuel injection and nozzle geometry [37,38]. Table 1 shows the influence of injection pressure and nozzle geometry.
From the literature, the fuel injection pressure nozzle geometry viz.; the number of holes and diameter of holes has a higher impact on biodiesel-operated diesel engines [46]. This may be attributed to higher viscosity, reduced vaporization, lower heating, and spray characteristics of biodiesel fuels [47,48,49]. As the injection pressure increases, the area of spray increases for biodiesels. In addition, due to biodiesel’s higher injection pressure, the injected fuel breaks more massive droplet sizes into a finely atomized form [50]. This gives improved engine performance compared to the baseline operation. Hence an injection pressure for 100% SuOME is not optimized for use in a diesel engine. Emissions of CO2 are based on load and engine operating conditions. Hence, the CO2 emissions of biodiesel-operated engine are higher than diesel modes of operation due to their low gross calorific value. On the other hand, based on the study carried by Argonne National Laboratory, use of biodiesel causes less environmental concern as the study on B100 revealed that the life cycle of greenhouse gas emission of biodiesel is 74% lesser than conventional diesel.
Similarly, as the number of injector holes increases, they tend to supply more fuel into the combustion chamber, improving combustion. However, due to the increased quantity of fuel, SFC reduces. Hence previous work showed there is a significant effect of injector hole size for different biodiesel. However, less work has been observed on a combination of injection pressure and the effect of injector hole diameters on engine performance using SuOME as fuel. Hence, studying the combined effects of injection pressure and injector hole size is crucial to obtain higher efficiency and reduced emissions. Hence, the current study aims to improve the overall performance of SuOME fueled diesel engines by optimizing both fuel injection pressure and injector geometry.

2. Materials and Methods

In the following section, details about Simarouba biodiesel’s preparation, properties of prepared biodiesel, experimental setup, specifications of the setup used for experimentation, different fuel injectors used, and modifications on the engine are explained.

2.1. Simarouba Oil Methyl Ester Production

The details about the experimental procedure used to prepare SuOME, its characterization, and the experimental test rig used for engine experimentation are shown in the following sections. The Simarouba oil methyl ester used in the study was produced at the University of Agricultural Sciences, Bangalore. SuOME was produced from Simarouba seed oil by the transesterification process. The various steps involved in converting Simarouba seeds to their biodiesel are shown in Figure 1. The transesterification setup consists of a 3-neck round-bottom flask of 2 L capacity and a high-speed magnetic stirrer for mixing all the oil. KOH as a catalyst, and methanol as alcohol is used in the production of SuOME.
The reaction procedure involves 1000 gm of Simarouba oil, 230 gm of methanol, and 8 gm of potassium hydroxide pellets mixed vigorously by starrier by maintaining a temperature of 60 °C (±2 °C) for 60 min to produce SuOME. The mixture was then transferred to a conical funnel and allowed overnight to separate the ester and glycerol by gravity. Next, glycerol, salt, and methanol were removed from the conical flask, and the esters were mixed with 250 gm of hot water and allowed to settle for 2 h. This assisted in separating the residual FFA and catalyst [51,52,53,54]. To remove the moisture content from the SuOME, silica gel crystals were added, and the ester was heated at 110 °C for 2 h.
The properties of SuOME and the percentage of different fatty acids have been determined at the Bangalore test house, Bangalore, and shown in Table 2 and Table 3, respectively. All experiments were carried with 100% pure SuOME, and the results were compared with diesel results.

2.2. Experimental Procedure

The experimental test rig and the injector patterns used in the present study are depicted in Figure 2a,b, respectively. All the experiments were carried out on 4-stroke single-cylinder Kirloskar to make a direct injection water-cooled CI engine capacity of 5.2 kW at 1500 rpm. The manufacturer specified that the injection pressure is 205 bar with a 3-hole injector with a 0.3 mm diameter for diesel fuel. All the experiments were carried at 1500 rpm, which the governor provided with the engine achieved. On the head of the cylinder, a piezoelectric pressure transducer was attached by the manufacturer. Emissions from the engine were measured using a DELTA 1600S (5-gas analyzer) and HARTRIDGE Smoke meter-4 to measure smoke opacity. The technical specification of the engine, 5-gas analyzer, and smoke meters are shown in Table 4.

3. Results

This section presents the outcomes of tests carried out at two different loads (4.16 and 5.2 kW) operating at 1500 rpm for four injection pressures (205, 220, 240, and 260 bar) and nozzle geometry (a three, four, five, and six-hole injector with 0.2, 0.25 and 0.3 mm) on the performance of an engine fueled with SuOME. All the readings recorded from the instruments with the total uncertainty of ±2.3% were calculated based on the square root method.

3.1. Effect of Fuel Injector Pressure

Baseline fuel injection pressure was 205 bar for diesel as prescribed by the engine supplier. However, to study the impact of injection pressure on SuOME mode of operation on engine performance, the injection pressure was varied from 205 to 260 bars. An optimum fuel injection pressure was fixed for SuOME for further studies based on the performance, emission, and combustion parameters. The optimum result was also compared with diesel with a standard manufacturer mode of injection pressure of 205 bar.

3.1.1. Brake Thermal Efficiency

The variation in brake thermal efficiency on a partial and full load for SuOME for different fuel injection pressures is shown in Figure 3. Higher brake thermal efficiency is observed from the engine during an 80% load of full load compared to full load for all the injection pressures and diesel. Based on the results, the highest brake thermal efficiency for SuOME mode of operation is 27.25% at 240 bar. A further increase in injection pressure resulted in a drop in brake thermal efficiency, and this may be attributed to the fact that as the injection pressure increased, the droplet size reduced and hence suffered in penetrating deeper into the combustion chamber [57,58]. However, due to the higher viscosity of SuOME than diesel, reduced BTE was recorded for SuOME.

3.1.2. Effect on Emissions: HC, CO, Smoke, and NOx on Fuel Injector Pressure

The emission of unburnt HC on different power for SuOME is shown in Figure 4a. A noticeable drop has been observed at 240 bar injection using a standard injector because of enhanced atomization of SuOME and better combustion for injected fuel. Ignition delay viz., the physical delay also reduced due to an increase in injection pressure. HC was reduced by 47 to 41 ppm by increasing the injection pressure from 205 to 240 bar at a 4.16 kW load. Increasing the injection pressure further, the HC level raised to 42 ppm. This may be due to a top portion of the injected fuel burning in the combustion diffusion phase based on a smaller fuel spray and reduced ignition delay. Hence, it can be concluded that HC emissions are less at 240 bar operation with a three-hole injector, and this is due to superb atomization and increased combustion of SuOME rather than other injection pressure.

3.1.3. Carbon Monoxide

Figure 4b shows CO emissions for a partial and full load for SuOME and diesel. CO emissions were also raised as the load increased, which could be incomplete combustion at full load. Both CO and HC emissions followed similar trends with reduced CO emissions at 240 bar of fuel injection than 205 bar for SuOME. CO emission at 240 bar injection pressure was 0.14% at 4.16 kW. However, CO emissions for diesel were further lesser than SuOME at 240 bar injection pressure. This may be due to the complete combustion of diesel because it has a more volatile nature than SuOME [27].

3.1.4. Smoke Opacity

Figure 4c shows how injection pressure on smoke opacity with BP operated, using diesel and SuOME. Smoke levels were observed to fall with increased IOP compared to the standard injector opening pressure for SuOME. This trend may be attributed to improved air–fuel mixture resulting from higher atomization of SuOME. The lowest smoke level of 49 HSU has been observed at an IOP of 240 bar at 80% load. With a further increase in the IOP to 260 bar, the fuel tended to suffer in finding the fresh air for combustion [16]. Smoke opacity for IP of 205, 220, 240, and 260 bar were 58, 54, 49, and 51 HSU, respectively, for 80% load operated using SuOME. However, the smoke opacity for diesel was 43 HSU and was lesser than SuOME due to the fuel’s complete reaction.

3.1.5. Nitrogen Oxide

The emission of NOx for 80 and 100% load for SuOME fuel and diesel is shown in Figure 4d. The figure shows that NOx emission was uppermost at 220 bar injection pressure; the possible reason is the optimum oxygen content supply. The NOx emission decreased with an increase in injection pressure. The highest and lowest NOx emission ranged from 1080 and 960 ppm, respectively. At 4.16 kW, the NOx emission was 0.094, 0.091, 0.087, 0.089, and 0.068 g/kWh, and the corresponding injection pressure 205, 220, 240, 260 bar for SuOME and 205 bar for diesel.

3.2. Influence of Number of Injector Holes and Their Orifice Diameter

This section shows the effect of different numbers of injector holes and their orifice diameter on the performance of SuOME fueled engines. To study the effect of the number of injector holes, a three, four, five, and six-hole injector was used, and based on the results, a six-hole injector was optimized. A six-hole injector was used with a varied orifice diameter of 0.3, 0.25, and 0.2 mm to study the effect of the nozzle orifice diameter.

3.2.1. Brake Thermal Efficiency

The variation of BTE for SuOME injected with three, four, five and six-hole injectors of orifice diameter 0.3 mm is shown in Figure 5a. Figure 5b shows the variation of BTE of six-hole injectors having an orifice diameter of 0.3, 0.25, and 0.2 mm. As the number of holes increases, the amount of high viscous fuel injected will increase. Hence a 3.2% increase in BTE with a six-hole injector has been recorded compared to the three-hole injector, which operated at 240 bar of injection pressure with SuOME. On the other side, as the orifice size reduced from 0.3 to 0.2 mm, enhanced fuel–air mixture formation occurred inside the CC, which tends to increase the combustion rate and hence, there was a higher BTE [20,59]. However, increasing the number of orifice holes to more than six is practically impossible, and reducing the orifice diameter to less than 0.2 mm nullified the above effect as the injected fuel moves much faster than air. This tends to reduce mixture formation and results in a reduction in engine performance [58,60,61].

3.2.2. Unburnt Hydrocarbon and Carbon Monoxide Emissions

Variation of HC and CO emissions for SuOME fuel injected with three, four, five, and six holes with an orifice diameter of 0.3 mm and the effect of injector orifice diameter for six-hole injectors is shown in Figure 6a,b and Figure 6c,d, respectively. HC and CO emissions from six-hole injectors for SuOME are 38 ppm and 0.121%, whereas HC and CO emissions from three-hole injectors for SuOME fuel are 42 ppm and 0.142%. Based on the emissions of HC and CO, a six-hole injector was used for further studying the effect of the orifice hole diameter. HC and CO emissions from the 0.3, 0.25, and 0.2 mm orifice diameters were 38, 37, and 36 ppm and 0.121, 0.111, and 0.09%, respectively. For the same power to develop, more SuOME needed to be injected, and hence higher HC and CO were observed than diesel. However, larger hole diameters tended to deposit injected fuel onto the walls of the combustion chambers [27,46]. Hence HC and CO were greater with a standard injector.

3.2.3. Smoke Opacity

The influence of the number of injector holes on smoke opacity is shown in Figure 6e. As the number of holes increases in the injector nozzle, the smoke opacity of SuOME operated engine reduces. Smoke opacity for SuOME mode of operation using three, four, five, and six-hole injectors with 0.3 mm diameter was 51, 51, 50, and 49.5, respectively. This may be attributed to the fact that holes directly affect increased the fuel–air mixture formation and reduced smoke [62,63]. Higher smoke emission was observed with three, four, and five-hole nozzles due to the improper fuel–air mixture. Another reason for the reduced smoke emissions may be due to the higher BTE [36].
The influence of injector orifice diameter on smoke opacity for SuOME fueled CI engine is presented in Figure 6f. Compared to the six-hole with an 0.3 mm orifice diameter, smoke opacity from an 0.2 mm diameter showed reduced smoke opacity. By reducing the injector orifice diameter from 0.3 to 0.2 mm diameter, smoke emission was reduced by 10%. This may be attributed to the fact that as the orifice’s diameter reduced the atomization of fuel, a more delicate spray of highly viscous SuOME resulted in nearly complete combustion of supplied fuel, with higher BTE and reduced smoke opacity [2].

3.2.4. Nitrogen Oxide

Variations of emissions of oxides of nitrogen with three, four, five, and six-hole injector and six-hole injectors with an orifice diameter of 0.3, 0.25, and 0.2 mm for a SuOME operated engine are shown in Figure 6g,h, respectively. NOx emissions depended on combustion temperature in the adiabatic flam region. Higher NOx was observed with the diesel mode of operation due to the higher combustion temperature of low volatile diesel than SuOME [27]. NOx emission was higher for a six-hole injector with an orifice diameter of 0.2 mm than a three-hole injector with a 0.3 mm orifice diameter by 12 ppm. This increase in NOx for small hole injectors was due to superior combustion and increased heat release rate inside the combustion chamber at premixed combustion [64].

3.3. Combustion Analysis

Figure 7a shows the in-cylinder pressure for diesel and SuOME for six-hole injectors with a 0.3, 0.25, and 0.2 mm orifice diameter. The data for cylinder pressures for different crank angles are obtained from an average of 500 cycles for SuOME, diesel fuel only for 80% loading of full load. SuOME with an injector orifice diameter of 0.2 mm showed peak pressure near to the diesel mode of operation. Peak pressure with other injectors recorded reduced in-cylinder peak pressure.
The variation of heat release rate with SuOME and diesel fuel for different injectors are shown in Figure 7b. A higher heat release rate was observed from diesel compared to SuOME. This may be attributed to diesel fuel burning in the premixed phase because of the higher volatility of SuOME. A higher performance for diesel was also observed mainly due to this reason. A higher peak was observed for SuOME than diesel under diffusion during the phase [65]. Hence combustion rates were higher during later stages of combustion with SuOME. Hence, it produced increased exhaust emissions and reduced brake thermal efficiency. Due to the later combustion, NOx emissions from SuOME were lower than emissions from diesel [27,33,46].

4. Conclusions

A detailed experimental study on the viability of SuOME in the CI engine was carried out, and it was observed that the performance and combustion parameters were lesser than diesel. In the present study, an attempt was made to improve the performance of a SuOME operated engine by appropriately adjusting a few engine parameters such as fuel injection pressure and nozzle geometry. Injecting SuOME fuel into the cylinder up to 240 bar from 205 bar showed improved performance with reduced emissions. Further increasing the fuel injection pressure recorded unfavorable results. Further, to improve the SuOME operated engine’s efficiency, a four, five, and six-hole injector was used and compared with a standard three-hole injector. Increasing the injector holes up to six holes improved the engine’s performance with reduced emissions for SuOME mode.
Further study was also carried out on varying the injector orifice diameter. A further increase in engine combustion was observed by reducing the orifice diameter from 0.3 to 0.2 mm. Finally, to conclude, operating the engine by slightly varying the manufacturer standards settings such as increasing fuel injection pressure and the number of injector holes and reducing the injector orifice diameter, a direct injection CI engine can be operated by SuOME fuel to obtain a considerably increased performance of the engine. In future studies, the emissions and losses (combustion, exhaust, heat transfer, and pumping), and energy balance should be evaluated to optimize the combustion from emissions, and efficiencies can be carried out. For 240 bar compared to 205 bar of injection pressure (IP) for SuOME, the BTE increased by 2.35%, and smoke opacity reduced 1.45%. For the six-hole fuel injector compared to a three-hole injector, the BTE increased by 3.19%, HC reduced by 9.5%, and CO reduced by 14.7%. At 240 bar IP, for the six-hole injector with a 0.2 mm hole diameter compared to 0.3 mm hole diameter, the BTE increased by 5%, HC reduced by 5.26%, CO reduced by 25.61%, and smoke reduced by 10%, while NOx increased marginally by 0.27%. Hence, the six-hole FI, 240 IP, and 0.2 mm FI diameter holes are suitable for diesel engine operation fueled by Simarouba biodiesel.

Author Contributions

K.K.N.: conceptualization, methodology, writing—Original Draft. T.K.C. and N.R.B.: Supervision, investigation, project administration and resources. J.G.S.: conceptualization, writing, review and editing. M.E.M.S.: interpretation of results, review and Editing, formal analysis. A.E.A.: Funding, review and editing. M.G.: Project administration, review and editing. A.E.: Support, review and editing. M.A.M., M.I.H.S. and M.A.A.: formal analyses, review and editing. All authors have read and agreed to the published version of the manuscript.

Funding

Deanship of Scientific Research at King Khalid University for the support through General Research Project under the grant number (R.G.P.2/138/42). Taif University researchers supporting project number (TURSP–2020/40), Taif University, Taif, Saudi Arabia.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Acknowledgments

The co-author Ali E. Anqi would like to extend his appreciation to the Deanship of Scientific Research at King Khalid University for the support he received through the General Research Project under the grant number (R.G.P.2/138/42). This work was also supported by Taif University researchers supporting project number (TURSP–2020/40), Taif University, Taif, Saudi Arabia.

Conflicts of Interest

The authors declare no conflict of interest.

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Figure 1. Steps involved in the transesterification process.
Figure 1. Steps involved in the transesterification process.
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Figure 2. Engine (a) Experimental setup Reproduced from [6] Elsevier: 2019 and (b) fuel injection spray pattern Reproduced from [56] Elsevier: 2019.
Figure 2. Engine (a) Experimental setup Reproduced from [6] Elsevier: 2019 and (b) fuel injection spray pattern Reproduced from [56] Elsevier: 2019.
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Figure 3. Variations of brake thermal efficiency over brake power.
Figure 3. Variations of brake thermal efficiency over brake power.
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Figure 4. Variations of (a) HC, (b) CO, (c) smoke and (d) NOx at different brake power.
Figure 4. Variations of (a) HC, (b) CO, (c) smoke and (d) NOx at different brake power.
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Figure 5. Variations of BTE upon (a) number of injector holes and (b) orifice diameter of the injector.
Figure 5. Variations of BTE upon (a) number of injector holes and (b) orifice diameter of the injector.
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Figure 6. Variations of emissions on number of injector holes and orifice diameter of the injector: (a) and (b) HC; (c) and (d) CO; (e) and (f) smoke; (g) and (h) NOx.
Figure 6. Variations of emissions on number of injector holes and orifice diameter of the injector: (a) and (b) HC; (c) and (d) CO; (e) and (f) smoke; (g) and (h) NOx.
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Figure 7. Variations of (a) in-cylinder pressure and (b) HRR with crank angle.
Figure 7. Variations of (a) in-cylinder pressure and (b) HRR with crank angle.
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Table 1. Influence of injection pressure and nozzle geometry on engine performance using different biodiesels.
Table 1. Influence of injection pressure and nozzle geometry on engine performance using different biodiesels.
Type of Biodiesel and Blends RatiosEngine ParametersEngine TypeOutputRef.
Simarouba oil,
B5, B10 B15, and B20
220 bar, 23 °bTDC with three-hole injectorKirloskar, single-cylinder, 3.5 kW, 1500 rpm naturally aspirated engineCO2 was lesser than diesel.
BTE was higher for all blends
[33]
Pumpkin seed oil methyl ester, B25CR 16.5:1 to 19.5:1
IT 19 °bTDC to 25 °bTDC in the range of 2 °bTDC, IP 190 bar to 250 bar in the range of 20 bar
Kirloskar/TV1, 5.2 kW, 1500–6000 rpmHigh output with CO, HC, and smoke reduction was observed with high CR 19.5:1, IP 250 bar and IT 25 °bTDC.[39]
Castor oil biodiesel,
B20
IP: 200, 250 and 300 bar, IT—21, 23, and 25 °bTDCKirloskar TV1, DI, CI, 5.2 kW, Speed 1500 rpm, 1C, 4SObserved increase in BSFC, HRR, CO, HC, and smoke with a reduction in BTE and NOx[40]
Roselle oil,
B20, B40 and B100
IP: 180, 200, 220, 240, and 260 barsLegion Brothers, single cylinder, 3.7 kW, 1500 rpmBTE was higher for RB20 at 180 bar, BSFE also lesser for RB 20 blends. EGT and smoke was higher for the optimized fuel[41]
Waste cooking oil biodiesel,
B20
IP 170 bar to 220 bar, engine speed at 1000 rpm to 3000 rpmKirloskar TV1, DI, CI, 5.2 kW, 1500 rpmUHC and smoke opacity decreased while NOx and CO2 increased with the increasing IP[42]
Honge oil methyl esterIP 210, 220,
230 and 240 bars, IT 19, 23 and 27 °bTDC combustion chamber slots 5.5, 6.5 and 7.5 mm. NG 3,4,5 holes
TV1 (Kirlosker make), 200 to 225 bar, 5 HP @1500 rpmThe highest performance was achieved at 230 bar[43]
Simarouba oil methyl ester and producer gasCC HCC and RCC, NG 0.4 mm hole size, IP 230 barKirloskar make, TV1 type, 3.7 KW, 1500 rpm4.3% higher BTE, 18% reduction in smoke, 11.6% lesser HC, 14.28% reduced CO, 3.9% increased NOx level with reduced ignition delay[44]
Simarouba oil methyl ester,
B100
CC- TRCC, LSCC, DSCC, LDSCC,
NG- 6 holes with 0.2 and 0.25 mm
Kirloskar make, TV1 type, 5.2 KW, 1500 rpm6 holes with 0.2 mm hole diameter for LDSCC resulted in increased performance than other NG and CC[45]
Table 2. Properties of fuel samples used in the present study [45].
Table 2. Properties of fuel samples used in the present study [45].
ParametersDieselSimarouba
Glauca
SuOMETest Methods
Gross calorific value, Cal/g10,27091739399IS:1448 (P6)
Flash point, °C (open cup)55>250184IS:1448 (P66)
Kinematic viscosity at 40 °C, cSt2.5–541.804.9IS:1448 (P25)
Density, g/mL at 15 °C0.8340.9390.813IS:1448 (P32)
Iodine value, mg/g-17.717IS:548
Cloud point, °C−172322IS:1448 (P10)
Acid value, mg of KOH/g-5.11.76IS:1448 (P2)
ColorBrownPale yellowYellow
Table 3. Percentage of various fatty acids.
Table 3. Percentage of various fatty acids.
Fatty AcidsOleic AcidLinoleic AcidLinolenic AcidPalmitic AcidStearic Acid
Value (%)59.103.300.3510.9025.60
Table 4. Specification of the engine and emission meters Reproduced from [55], Elsevier: 2020.
Table 4. Specification of the engine and emission meters Reproduced from [55], Elsevier: 2020.
No.ParticularsSpecifications
1Engine manufacturerKirloskar oil engines Ltd., India
2modelTV1
3EngineSingle cylinder, 4 strokes, Direct Injection (DI)
4Bore/stroke87.5 mm/110 mm
5Compression ratio17.5:1
6Engine speed1500 rpm
7Rated power5.2 kW (7 HP)
8Injection pressure205 bar/23° before TDC
9Type of sensorPiezoelectric
10Type of gas analyzerDELTA 1600S
11GasHC, CO, CO2, O2 and NOX
12Type of smoke meterHARTRIDGE SMOKEMETER-4
13Measuring range opacity0–100%
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N., K.K.; Banapurmath, N.R.; Chandrashekar, T.K.; S., J.G.; Soudagar, M.E.M.; Anqi, A.E.; Mujtaba, M.A.; Goodarzi, M.; Elfasakhany, A.; Siddiqui, M.I.H.; et al. Effect of Parameters Behavior of Simarouba Methyl Ester Operated Diesel Engine. Energies 2021, 14, 4973. https://doi.org/10.3390/en14164973

AMA Style

N. KK, Banapurmath NR, Chandrashekar TK, S. JG, Soudagar MEM, Anqi AE, Mujtaba MA, Goodarzi M, Elfasakhany A, Siddiqui MIH, et al. Effect of Parameters Behavior of Simarouba Methyl Ester Operated Diesel Engine. Energies. 2021; 14(16):4973. https://doi.org/10.3390/en14164973

Chicago/Turabian Style

N., Keerthi Kumar, N. R. Banapurmath, T. K. Chandrashekar, Jatadhara G. S., Manzoore Elahi M. Soudagar, Ali E. Anqi, M. A. Mujtaba, Marjan Goodarzi, Ashraf Elfasakhany, Md Irfanul Haque Siddiqui, and et al. 2021. "Effect of Parameters Behavior of Simarouba Methyl Ester Operated Diesel Engine" Energies 14, no. 16: 4973. https://doi.org/10.3390/en14164973

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