Informatics Publishing Limited

I. M. Yusri ¹, R. Mamat ², W. H. Azmi ², Omar I. Awad ¹, M. F. Othman ¹, S. M. Rosdi ¹

Affiliations
1 Faculty of Mechanical Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, MY
2 Automotive Engineering Centre, Universiti Malaysia Pahang, 26600 Pekan, Pahang, MY

Abstract

Objectives: In this study, evaluation of the potential of energy recovery in spark ignition engine using RON 95 gasoline fuels. Methods: The engine has been operated at a single engine speeds of 3500 RPM with 50% of Wide Throttle Open (WTO). The potential of energy recovery was measured by means of engine effective power, Water Heat Losses (WHL) and Exhaust Heat Losses (EHL). Findings: Comparative analysis of the experimental results showed an improvement of 1.16%, 2.12% and 3.08% in EHL at 75°C, 50°C and 25°C, respectively, by taking 120°C as the reference temperature of EHL. The results of the contour plot showed that a trade-off between the WHL and EHL. Conclusion: Higher proportions of energy losses can be utilised by considering both WHL and EHL.

Keywords

Exhaust Heat Losses, Effective Power, Water Heat Losses (WHL).

Full Text

   

Omar I. Awad ¹, R. Mamat ¹, M. M. Noor ¹, Thamir K. Ibrahim ¹, I. M. Yusri ¹

Affiliations
1 Faculty of Mech. Engg., Universiti Malaysia Pahang, Pekan, Pahang, MY

Abstract

Alcohols produced from a renewable source are amongst the important alternative fuels for internal combustion engines. Investigations on alternative fuels for compression ignition engines regarded as one of the major research areas. This paper details an experimental examination of the performance and emissions in single cylinder compression ignition engines operating with fusel oil F20 and pure diesel F0 at five engine speeds and 50% engine load. The test results indicated that the engine power and torque slightly decrease with the F20 at low speeds compared with pure diesel. Further, the in-cylinder pressure was decreased at all engine speed for F20 in comparison with pure diesel. The volumetric efficiency and fuel consumption were increased for F20 due the low heating value of fusel oil. The results showed that CO₂ and CO emissions were increased because of the water content, low heating value and low cetane number for fusel oil. The maximum reduction in NO_x emissions was 18% for F20 at 1500 rpm.

Keywords

Fusel Oil, NO_x Emissions, Single Cylinder Engine, Alternative Fuels, Engine Performance.

Full Text