An Assessment of the Performance and Emissions of an Otto Power Generator Group Operating with Wet Ethanol at a High Volumetric Compression Ratio

Vinícius Guerra Moreira, Sérgio de Morais Hanriot (), Tales Nazareno, Bruno Eustáquio Pires Ferreira, Rafael Motter Juliatti, Hairton Júnior José da Silveira and Cristiana Brasil Maia
Additional contact information
Vinícius Guerra Moreira: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Sérgio de Morais Hanriot: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Tales Nazareno: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Bruno Eustáquio Pires Ferreira: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Rafael Motter Juliatti: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Hairton Júnior José da Silveira: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil
Cristiana Brasil Maia: Department of Mechanical Engineering, Pontifical Catholica University of Minas Gerais, Belo Horizonte 30535-901, Brazil

Energies, 2024, vol. 17, issue 23, 1-18

Abstract: This work presents an experimental study of the performance and emissions of an internal combustion engine operating in the Otto cycle with a high volumetric compression ratio (17:1). The engine was initially fueled with the standard ethanol used in Brazil, with 7% distilled water (E93W07); we then studied the effects of using different ethanol-in-water mixtures, or ‘wet ethanol’, with 17%, 27%, 37%, and 47% distilled water concentrations. The tests were carried out with power loads of 5.0–25.0 kW at 5.0 kW intervals and with power loads of 27.5–35.0 kW at 2.5 kW intervals, whether by adding up the loads or by taking them away. The ignition timing was changed to evaluate each load imposed on the engine to avoid knocking. Specific fuel consumption (SFC), brake thermal efficiency (BTE), carbon dioxide emissions (CO 2 ), carbon monoxide (CO), nitrogen oxides (NO x ), and total hydrocarbon content (THC), as well as the internal pressure in the cylinder and the heat release rate, were measured, and the results are compared. The results show a reduction in CO and NO x and an increase in THC emissions. However, there were no significant changes in CO 2 emissions when the distilled water percentage in ethanol increased. Regarding the brake thermal efficiency, it was observed that it remained approximately constant for all blends, with the same load being applied to the engine shaft, reaching a maximum value of 35%. The results obtained confirm the technical feasibility of operating an internal combustion engine in the Otto cycle with a high volumetric compression ratio using ethanol with up to 47% distilled water without significant loss of performance.

Keywords: power generation group; biofuel; wet ethanol; performance; emissions; high compression (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/23/6187/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/23/6187/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:23:p:6187-:d:1539163

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().