Performance and combustion characteristics of a diesel engine with titanium oxide coated piston using Pongamia methyl ester

Prabhahar, M.; Rajan, K.

doi:10.1007/s12206-013-0332-3

Cited by 25 publications

(12 citation statements)

References 11 publications

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“…In the case of coated biofuel operation, Aydin [20], MohamedMusthafa [17], Taymaz [16] and Prasath [34] reported that the HRR were decreased by 20%, 3%, 19% and 27% respectively when compared with the uncoated engines. In contrast, Prabhahar [26] and Rajan [27] found that HRR were increased by 5% and 13.8% when coatings were applied. It was discovered that coating piston crowns only led to the increased HRR values ( Table 3).…”

Section: Heat Release Ratementioning

confidence: 88%

“…Furthermore, in the case of UD to CB scenario, relatively higher improvement on BTE of 6.3% [31], and 4.9% [34] were reported. In contrast, 4.9% [27] and 3.7% [26] decrease in the BTE values were also reported when switched from UD to CB operation. It was thought that biofuel types and quality of coatings might have caused these unexpected results.…”

Section: Brake Thermal Efficiencymentioning

confidence: 90%

“…In the case of UD to CB scenario, most studies reported increased peak in-cylinder pressures (Table 7). However, few studies reported decreased in-cylinder pressures by 2 bars [26] and 0.7 bars [34] for UD to CB application. It was revealed that the partial coating (only piston crown coating) caused this [26] unexpected characteristic, as engine cooling is mainly affected by the changes in the cylinder liner and cylinder head.…”

Section: Peak In-cylinder Pressurementioning

confidence: 99%

“…However, few studies reported decreased in-cylinder pressures by 2 bars [26] and 0.7 bars [34] for UD to CB application. It was revealed that the partial coating (only piston crown coating) caused this [26] unexpected characteristic, as engine cooling is mainly affected by the changes in the cylinder liner and cylinder head. Table 8 demonstrated the effects of injection timing, injector opening pressure and fuel temperature on peak in-cylinder pressure, maximum rate of in-cylinder pressure rise and crank angle position at peak in-cylinder pressure.…”

Section: Peak In-cylinder Pressurementioning

confidence: 99%

“…Thermal barrier coatings can be applied on the surfaces of the components in the combustion chamber (piston crown, cylinder head and liner, inlet and exhaust valves). Research and development activities were carried out in various parts of the world to investigate how thermal barrier coatings affects the engine performance, combustion and exhaust gas emissions [12][13][14][16][17][18][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] characteristics when various types of biofuels (and their blends) were used in the engine instead of fossil fuel. Until now, application of TBC is so far limited to some race engines [37] and gas turbines [38] using standard fuels.…”

Section: Introductionmentioning

confidence: 99%

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Biofuels and thermal barrier: A review on compression ignition engine performance, combustion and exhaust gas emission

Masera

Hossain

2019

Journal of the Energy Institute

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The performance of an internal combustion engine is affected when renewable biofuels are used instead of fossil fuels in an unmodified engine. Various engine modifications were experimented by the researchers to optimise the biofuels operated engine performance. Thermal barrier coating is one of the techniques used to improve the biofuels operated engine performance and combustion characteristics by reducing the heat loss from the combustion chamber. In this study, engine tests results on performance, combustion and exhaust emission characteristics of the biofuels operated thermal barrier coated engines were collated and reviewed. The results found in the literature were reviewed in three scenarios: (i) uncoated versus coated engine for fossil diesel fuel application, (ii) uncoated versus coated engine for biofuels (and blends) application, and (iii) fossil diesel use on uncoated engine versus biofuel (and blends) use on coated engine. Effects of injection timing, injection pressure and fuel properties on thermal barrier coatings were also discussed. The material type, thickness and properties of the coating materials used by the research community were presented. The effectiveness and durability of the coating layer depends on two key properties: low thermal conductivity and high thermal expansion coefficient. The current study showed that thermal barrier coatings could potentially offset the performance drop due to use of biofuels in the compression ignition engines. Improvements of up to 4.6% in torque, 7.8% in power output, 13.4% in brake specific fuel consumption, 15.4% in brake specific energy consumption and 10.7% in brake thermal efficiency were reported when biofuels or biofuel blends were used in the thermal barrier coated engines as compared to the uncoated engines. In coated engines, peak cylinder pressure and exhaust gas temperature were increased by up to 16.3 bar and 14% respectively as compared to uncoated condition. However, changes in the heat release rates were reported to be between-27% and +13.8% as compared to uncoated standard engine. Reductions of CO, CO2, HC and smoke emissions were reported by up to 3.8%, 11.1%, 90.9% and 63% respectively as compared to uncoated engines. Significant decreases in the PM emissions were also reported due to use of thermal barrier coatings in the combustion chamber. In contrast, at high speed and at high load operation, increase in the CO and CO2 emissions were also reported in coated engines. Coated engines gave higher NOx emissions by about 4-62.9% as compared to uncoated engines. Combined effects of thermal barrier coatings and optimisation of fuel properties and injection parameters produced further performance and emissions advantages compared to only thermal barrier coated engines. Overall, current review study showed that application of thermal barrier coatings in compression ignition engines could be beneficial when biofuels or biofuel blends are used instead of standard fossil diesel. However, more research is needed combining coatings, types of bio...

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