Article
Energy & Fuels
Felix C. P. Leach, Martin Davy, Barbara Terry
Summary: The study shows that CeO2 as a fuel-borne catalyst can reduce emissions and improve combustion efficiency. CeO2 significantly reduces soot and THC emissions at low load, but not as much at high load. A minor reduction in NOx emissions is observed at high load, with no significant difference in fuel consumption.
Article
Thermodynamics
Ziming Yan, Brian Gainey, James Gohn, Deivanayagam Hariharan, John Saputo, Carl Schmidt, Felipe Caliari, Sanjay Sampath, Benjamin Lawler
Summary: The study demonstrates the feasibility and benefits of thick thermal barrier coatings with advanced low-temperature combustion concepts, showing increased combustion efficiency and fuel conversion efficiency. The thick TBC extends the low load limit for both gasoline and wet ethanol cases, without observing deterioration of the high load limit. Gasoline exhibits the largest benefits at low load, while wet ethanol experiences the largest benefits at mid-to-high load.
Article
Engineering, Mechanical
S. Nishii, Y. Yamasaki
Summary: Research has been conducted on advanced combustion technologies and model-based control for achieving high thermal efficiency and low emission in automobile engines. An onboard adaptation method using neural networks to adjust model parameters has been shown to significantly improve prediction accuracy and control accuracy of heat release rate models.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Weihua Zhao, Junhao Yan, Suya Gao, Timothy H. Lee, Xiangrong Li
Summary: The study highlights the importance of researching the performance and emission characteristics of diesel engines fueled with diesel/alcohol blends under high-altitude conditions. The results show that diesel/alcohol blends can extend the operating range of diesel engines at high altitudes, with higher NOx emissions but reduced soot emissions compared to pure diesel.
Article
Energy & Fuels
Zin Thu Aung, Chinda Charoenphonphanich, Pop -Paul Ewphun, Hidenori Kosaka
Summary: Alternative diesel production from mixed waste plastic pyrolysis is an effective method for waste plastic management. This paper investigated the combined effect of low ambient temperature and high density on the transition from hot temperature combustion to low temperature combustion. The results showed that decreasing the ambient temperature can reduce the emissions of nitrogen oxides and soot and increase integral heat release. Waste plastic diesel had higher nitrogen oxides and soot concentrations compared to commercial diesel at the same ambient temperature, but had significantly lower concentrations compared to commercial diesel with the same ignition delay.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Energy & Fuels
Alessandro Brusa, Nicolo Cavina, Nahuel Rojo, Jacopo Mecagni, Enrico Corti, Davide Moro, Matteo Cucchi, Nicola Silvestri
Summary: This paper focuses on the implementation of innovative adaptive strategies and a closed-loop chain in a piston-damage-based combustion controller. By implementing self-learning algorithms and a closed-loop chain, the controller's accuracy and robustness are ensured.
Article
Thermodynamics
Juan Zapata-Mina, Alvaro Restrepo, Juan Esteban Tibaquira
Summary: This study evaluated the performance of low glyceride palm oil biodiesel blended with diesel fuel in a compression ignition engine through experimental analysis of exergy, emissions, and combustion characteristics. The results showed that higher concentrations of CO and CO2 were obtained for B10, while lower concentrations of NOx were found for B20 and B50. Increasing the fuel blend improved the combustion process by enhancing premixed burning and reducing diffuse burning. Decreasing the glyceride content in biodiesel resulted in adequate performance, significant emission reduction, and homogeneous combustion when blended with conventional diesel.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Hyunwook Park, Euijoon Shim, Junsun Lee, Seungmook Oh, Changup Kim, Yonggyu Lee, Kernyong Kang
Summary: The combination of a double injection strategy and a large-squish piston significantly improved brake thermal efficiency and reduced methane emissions, mainly by improving combustion loss.
Article
Energy & Fuels
Zhanming Chen, Jingjing He, Hao Chen, Limin Geng, Peng Zhang
Summary: A comparative study on the effects of energy substitution ratio (ESR) on the combustion characteristics and performance of a dual fuel engine fueled with diesel/alcohols was conducted. Premixed combustion of diesel was influenced by alcohol enrichment, affecting ignition delay and combustion duration. Methanol was found to be most beneficial in prolonging ignition delay and shortening combustion duration. Energy substitution ratio also affected brake thermal efficiency (BTE) and NOx emissions differently for different alcohol types.
Article
Energy & Fuels
Amin Yousefi, Hongsheng Guo, Shouvik Dev, Simon Lafrance, Brian Liko
Summary: This study investigates the effect of split diesel injection strategy on an ammonia/diesel dual-fuel engine under medium load conditions. Results show that the use of split diesel injection strategy increases the thermal efficiency and reduces the unburned ammonia emissions. Two optimized split diesel injection strategies are suggested to reduce greenhouse gas emissions while improving combustion efficiency, although they result in higher nitrogen oxides emissions.
Article
Instruments & Instrumentation
Jai-Houng Leu, Ming-Wei Shao, Tian-Syung Lan, Xuan Sun, Chih-Ying Chuang
Summary: This study investigated the utilization of pyrolysis oil (PO) from scrap tires in combination with diesel in engine performance, efficiency, and emission of pollutants. The results showed that using a mixture of PO and diesel can enhance efficiency, reduce pollutant emissions, and adjusting the engine control module (ECM) is necessary to achieve similar performance to traditional diesel.
SENSORS AND MATERIALS
(2021)
Article
Multidisciplinary Sciences
Hainan Zheng, Honggen Zhou, Chao Kang, Zan Liu, Zhenhuan Dou, Jinfeng Liu, Bingqiang Li, Yu Chen
Summary: A novel method for modeling the performance of marine diesel engines is proposed, utilizing deep neural networks and virtual sample generation technology to enhance accuracy and reduce testing costs. Experimental results show an overall prediction accuracy of more than 93%, with power being the key factor affecting brake specific fuel consumption and speed being the key factors affecting vibration and noise.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
Alessandro Brusa, Nicolo Cavina, Nahuel Rojo, Jacopo Mecagni, Enrico Corti, Vittorio Ravaglioli, Matteo Cucchi, Nicola Silvestri
Summary: This study focuses on the development and validation of a spark advance controller based on a piston damage model and a predictive knock model. The controller features a model-based open-loop algorithm that can accurately calculate the spark timing for achieving the desired piston damage under knock-limited engine conditions, while also targeting maximum combustion efficiency. The controller is designed for use in a feedback-free environment and has been successfully validated through real driving maneuvers on an engine test bench.
Article
Chemistry, Multidisciplinary
Alfredas Rimkus, Tadas Vipartas, Jonas Matijosius, Saulius Stravinskas, Donatas Kriauciunas
Summary: Replacing diesel fuel with chicken fat in a compression ignition engine resulted in changes in combustion process and emissions. Chicken fat increased CO2 and CO emissions, while reducing smoke and NOx emissions when more fat was added in the fuel mixture. The engine's BSFC increased and BTE decreased due to differences in fuel energy properties.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Nurul Hanim Razak, Haslenda Hashim, Nor Alafiza Yunus, Jiri Jaromir Klemes
Summary: The study demonstrates that a blend of 70% diesel, 20% biodiesel, and 10% butanol is the optimal choice, providing similar performance to diesel with reduced NOx emissions of 7% to 15% at a lower cost.
JOURNAL OF CLEANER PRODUCTION
(2021)