Kurumun Atıf Alan Makalesi
Atıf Alan Yayın
Energy and exergy analyses of a diesel engine fuelled with biodiesel-diesel blends containing 5% bioethanol
Scopus
Open Access Toplam 116 atıf DOI
In this study, energy and exergy analysis were performed for a single cylinder, water-cooled diesel engine using biodiesel, diesel and bioethanol blends. Each experiment was performed at twelve different engine speeds between 1000 and 3000 rev/min at intervals of 200 rev/min for four different fuel blends. The fuel blends, prepared by mixing biodiesel and diesel in different proportions fuel with 5% bioethanol, are identified as D92B3E5 (92% diesel, 3% biodiesel and 5% bioethanol), D85B10E5 (85% diesel, 10% biodiesel and 5% bioethanol), D80B15E5(80% diesel, 15% biodiesel and 5% bioethanol) and D75B20E5 (75% diesel, 20% biodiesel and 5% bioethanol). The effect of blends on energy and exergy analysis was investigated for the different engine speeds and all the results were compared with effect of D100 reference fuel. The maximum thermal efficiencies obtained were 31.42% at 1500 rev/min for D100 and 31.42%, 28.68%, 28.1%, 28% and 27.18% at 1400 rev/min, respectively, for D92B3E5, D85B10E5, D80B15E5, D75B20E5. Maximum exergetic efficiencies were also obtained as 29.38%, 26.8%, 26.33%, 26.15% and 25.38%, respectively, for the abovementioned fuels. As a result of our analyses, it was determined that D100 fuel has a slightly higher thermal and exergetic efficiency than other fuel blends and all the results are quite close to each other.
Atıf Kaynağı
Atıf Yapan Yayın
Energy, exergy, exergoeconomic and sustainability analysis of a propane-fueled SI engine operating via flame jet ignition using oxy-hydrogen gas from an on-board alkaline electrolyzer supported by TEG
Scopus
Havuzumuzda 3 atıf almış
This paper focuses on the energy, exergy, exergoeconomic, and sustainability performance of oxygen-hydrogen (HHO) gas utilization for flame jet ignition in a propane-fueled SI engine. The required HHO gas is produced instantaneously using an alkaline electrolyzer. A significant portion of its energy was provided by electrical energy generated from exhaust waste heat using a thermoelectric generator (TEG). The HHO assisted flame jet ignition (HHO_AJI) system ignites the propane-air mixture in the main combustion chamber using HHO gas delivered in different proportions to the pre-chamber. The HHO flow rates used in flame jet ignition were 0.4 L/min (HHO_AJI-0.4), 0.7 L/min (HHO_AJI-0.7), and 1.0 L/min (HHO_AJI-1.0). The experimental studies were conducted at a constant engine speed of 2300 rpm, 50% throttle opening, and six different lambda values (λ = 0.9, 1.0, 1.1, 1.2, 1.3, and 1.4). The results indicate that the HHO_AJI system enhances exergetic performance under lean mixture conditions. At λ = 1.4 and an HHO flow rate of 1.0 L.min-1 thermal efficiency, exergy efficiency, and sustainability index increased by 66.7%, 67.2%, and 14.2%, respectively, compared to conventional ignition, while lost energy and exergy destruction decreased by 18.3% and 14.3%. Moreover, the exergoeconomic analysis showed that the specific exergy cost of shaft power decreased by 6.5%, confirming that operating the SI engine with a lean mixture under HHO_AJI mode is not only thermodynamically but also economically advantageous.
Atıf Yapan Makale Bilgileri
Kurumlar (2)
Selçuk Üniversitesi
Selçuklu, Turkey
Süleyman Demirel Üniversitesi
Isparta, Turkey