Study Effect of Exhaust Gas Recirculation upon Emissions and Performance by Using European Diesel and Iraqi diesel

Jamal, Lina; Saleh, Adel M.

doi:10.30684/etj.2021.131273.1021

	Study Effect of Exhaust Gas Recirculation upon Emissions and Performance by Using European Diesel and Iraqi diesel
Engineering and Technology Journal
Article 5, Volume 40, Issue 7, 2022, Pages 970-978 PDF (987.71 K)
Document Type: Research Paper
DOI: 10.30684/etj.2021.131273.1021
Authors
Lina Jamal^* ; Adel M. Saleh
Mechanical Engineering Dept., University of Technology-Iraq, Alsina’a street,10066 Baghdad, Iraq.
Abstract
This study investigated the effect of exhaust gas re-circulation (EGR) on performance and exhaust emissions in a single-cylinder, air-cooled, and direct-injection diesel engine. The Iraqi diesel fuel (D100) and European diesel fuel (ED100) were utilized at different speeds from (2100 to 3300 in intervals of 300) using the recycling of exhaust gas by a ratio (0%, 5%, 10%, 15%, and 20%. The study showed that European diesel fuel positively impacts engine performance and emissions. Compared to Iraqi diesel fuel, European decreased diesel fuel the brake-specific fuel consumption by (10.96%), increased brake thermal efficiency by (8.67%), decreased exhaust gas temperature by (9.99%), and (NO_X, UHC, and decreased (CO) emissions by (7.94%, 10.07%, and 36.98%) respectively. When using the EGR ratio, the highest percentage that can be used is (20%). If this percentage exceeds this, it will cause a flame loss because the recycled gases are inert. Furthermore, the results indicate that brake-specific fuel consumption increases by (15.395%) and brake thermal efficiency decreases by (13.44%) with increased EGR ratio. In contrast, exhausting gas temperature and NO_X emissions decreases by (4.01% and 14.57%) respectively. Finaly, the UHC and CO emissions increased with the increase of EGR ratio.
Highlights
Iraqi diesel produces higher NOx emissions than European diesel. Engine performance degrades with the EGR system. NOx emissions are reduced with the increase of EGR. CO and UHC emissions increased with the increase of EGR.
Keywords
EGR; Euro diesel; brake specific fuel consumption; thermal brake efficiency; NOx

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