Thermal characteristics of gasoline engine powered by petrol and LPG under variable speed, compression ratio

ABSTRACT

This study involves the evaluation of the thermal characteristics of gasoline engines fuelled with LPG instead of gasoline fuel using the simulation software Diesel-RK. The feasibility of using LPG is investigated via parameters (combustion, performance, and emissions) at different engine speeds and compression ratios. A two-zone combustion model is used. The results revealed that the maximum pressure obtained was 82 bar for gasoline compared to 78 bar for LPG at 5000 rpm. There is a noticeable reduction in BSFC with the use of LPG relative to gasoline for all ranges of compression ratio and engine speed used. The NOx emissions were significantly reduced by 8.60% using LPG rather than gasoline. Studies conducted by different researchers validate the obtained results.

KEYWORDS:

• Gasoline engine
• LPG
• Diesel-RK
• NOx

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The authors confirm that the data supporting the findings of this study are available within the article.

Additional information

Notes on contributors

Mohamed F. Al-Dawody

Mohamed F. Al-Dawody is currently working as a Professor, Department of Mechanical Engineering, College of Engineering, University of Al-Qadisiyah, Iraq. He has completed a PhD in (Power Mechanic) from Andhra University, India in the year 2014 and his Master degree (Power Mechanics) from Babylon University, Iraq in the year 2006 and B.Sc. in (Mechanic) from university of Babylon, Iraq in the year 2002. His research interest in energy and thermal engineering with special focus on alternative fuels and renewable energy. Currently, he is doing his research in the field of using hybrid fuels in a diesel engine.

Emad D. Aboud

Emad D. Aboud works as an assistant professor at the University of Babylon, College of Engineering - Al-Musayab / Energy and Renewable Energy Engineering Department. He has completed B.Sc. in (Mechanic) from the University of Baghdad, Iraq in 1988 and his master’s degree from the University of Technology / Department of Machinery and Equipment Engineering, in thermal mechanics (power) in 2003. He was obtained a PhD from University of Babylon / Department of Mechanics, in thermal mechanics (power) in 2016. His research interests relate to energy and renewable energies and thermal engineering, with special focus on the use of alternative fuels and renewable energy. Among his works, in addition to research work, is that he works as a Reviewer in Elsevier publishing house, where he was reviewed so many papers for FUEL and International Journal of Hydrogen Energy. Currently, he is doing his research in the field of using hybrid fuels in internal combustion engine.

Khaled Al-Farhany

Khaled Al-Farhany is a professor in the Department of Mechanical Engineering, University of Al-Qadisiyah, Al-Qadisiyah, Iraq. He was ahead of the Mechanical department from (2014-2019). He is currently editor-in-chief of Al-Qadisiyah Journal for Engineering Sciences/ Iraq since 2019. He was formerly an assistant lecturer at the Department of School of MACE, The University of Manchester, Manchester, UK. Professor Dr. K. Al-Farhany obtained his Bachelor of Science degree in Mechanical Engineering from the University of Mosul, Iraq, in1999 and his Master of Science degree in Refrigeration and Air-conditioning from the University of Mosul, Iraq, in 2002. Furthermore, he obtained his Doctor of Philosophy degree in Mechanical Engineering/ Heat and Mass Transfer in Porous Media, University of Manchester, UK, in 2012. Prof. Dr. Al-Farhany areas of interest include but not limited to, Heat and mass transfer, Thermo-fluids, air conditioning, heat and fluid in Porous medium, MHD, CFD, nanofluid mathematical modeling and numerical simulation. Khaled has published more than 100 papers in peer-reviewed journals in these areas. He has supervised and graduated several undergraduates and masters students.

Wisam Al-Obaidi

Wisam Al-Obaidi is an assistant professor at the University of Al-Qadisiyah / College of Engineering / Mechanical Engineering Department. Held his BSc and MSc degrees from the University of Baghdad in 2010; later, he had his Ph.D. from the University of Manchester in late 2019. Master Dissertation was related to how to design and analyze the vortex rate sensor in low and middle altitude gladder. PhD thesis was about how to analyze the flow of blood in the arteries and study the impact of flow on the rupture in Arteries. His Research Interests are in the combustion field, fluidics, and heat transfer. A number of Publications were published in prestigious journals and conferences in the fields mentioned above.

Kadhim K. Al-Chlaihawi

Kadhim Al-Chlaihawi is currently working as a lecturer at the Department of Mechanical Engineering, College of Engineering, University of Al-Qadisiyah, Iraq. He has completed MSc degree (Power Mechanic) from the University of Baghdad, Iraq in 2015 and B.Sc. in (Mechanic) from university of Al-Qadisiyah, Iraq in the year 2009. Currently, he is a Ph.D. student (Power Mechanic) at university of technology, Iraq. His research interest in energy and thermal engineering with special interest in turbulent air flow and heat transfer characteristics. A number of Publications were published in prestigious journals and conferences in the fields mentioned above.

Mohammed Qays Kadhim

Mohammed Qays Kadhim is currently studying PhD program in “ Peoples’ Friendship University of Russia” RUDN and work as a Chief engineer, Engineering department, Diwaniyah Governorate Office, Iraq. He has completed his master’s degree in (Power Engine) from Belarusian National Technical University, Belarusian in the year 2011 and B.Sc. in (Mechanic) from university of Babylon, Iraq in the year 2005. His research interest in energy and thermal engineering with special focus on alternative fuels and renewable energy. Currently, he is doing his research in the field of using hybrid fuels in a diesel engine.