Article
Energy & Fuels
P. Pavan, K. Bhaskar, S. Sekar
Summary: The experimental investigation demonstrated that a 40% reduction in NO emission was observed by introducing 10% pilot fuel and higher injection pressure at 32°bTDC compared with single injection mode at 23°bTDC. Smoke, HC, and CO emissions were found to be lower at 34°bTDC by 26.2%, 19.2%, and 21.5% respectively, with the same strategy. A slight increase in CO2 emission by 1.62% was noticed at 500 bar injection pressure at this injection timing compared to single injection mode.
Article
Thermodynamics
S. Jaikumar, V Srinivas, M. Rajasekhar
Summary: This study aims to improve the performance of a direct injection compression-ignition engine using nanoparticle dispersed Flaxseed oil biodiesel blend (B20). The addition of Chromium oxide (Cr2O3) nanoparticle additive has shown to enhance combustion characteristics, brake thermal efficiency, and reduce emissions.
Article
Thermodynamics
Mukesh Kumar, Bijan Kumar Mandal, Aritra Ganguly, Ravikant Ravi, Tabish Alam, Md Irfanul Haque Siddiqui, Sayed M. Eldin
Summary: The main objective of this study is to determine the performance, combustion, and emission analysis of compression ignition engines fueled with Chlorella Protothecoides microalgal biodiesel (CPMB). The results show that the performance of B20 blends is nearly identical to diesel, making it a feasible alternative fuel for engines.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Erkan Ozturk, Ozer Can
Summary: Biodiesel fuels produce higher NOx emissions in diesel engines, and this study investigated three techniques to mitigate the issue. The results showed that exhaust gas recirculation and injection retardation are effective methods, while ethanol addition did not significantly improve performance.
Article
Chemistry, Multidisciplinary
Guirong Wu, Jun Cong Ge, Min Soo Kim, Nag Jung Choi
Summary: This study investigates the effects of palm oil-diesel blend fuel on nitrogen oxides (NOx) and smoke emissions, and finds that under certain conditions, this fuel can perform comparably to diesel.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Ibrahim Aslan Resitoglu
Summary: This study focused on the effect of biodiesel on DOC and SCR efficiency, showing that biodiesel can enhance the activity of DOC without significantly affecting the NOx conversion of SCR catalyst.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Environmental Sciences
Md Modassir Khan, Arun Kumar Kadian, Rabindra Prasad Sharma
Summary: Quaternary blends of diesel-biodiesel-vegetable oil-alcohol have the potential to reduce fossil fuel usage and air pollution caused by marine diesel engines. The experimental work aimed to develop cleaner fuel and improve engine performance by fueling a diesel engine with quaternary blends of different compositions. The results showed that DBOProp20 blend exhibited the lowest fuel consumption and highest thermal efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Surya Kanth, Tushar Ananad, Sumita Debbarma, Biplab Das
Summary: Fuel injection pressure and timing are crucial parameters for engine performance and emissions. Using RB10+H-2 blend can increase fuel efficiency and reduce diesel consumption, resulting in lower CO, HC, and smoke opacity emissions, although slightly higher NOx emissions are observed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Xiumei Zhang, Rui Yang, Parthiban Anburajan, Quyet Van Le, Mishal Alsehli, Changlei Xia, Kathirvel Brindhadevi
Summary: By adding nanoparticles and hydrogen to the waste cooking oil biodiesel blends in a direct ignition engine, this research achieved improvements in performance parameters. The use of fuel blends had a positive impact on increasing power, torque, and brake thermal efficiency, while reducing fuel consumption.
Article
Green & Sustainable Science & Technology
Inbanaathan Papla Venugopal, Dhinesh Balasubramanian, Amudhan Rajarajan
Summary: The study explored the use of waste cooking oil biodiesel and polyoxymethylene dimethyl ether blends to reduce soot and NOx emissions in CRDI diesel engines without modifications, achieving better fuel efficiency.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Agricultural Engineering
Paras Gupta, Upendra Rajak, Tikendra Nath Verma, Manoj Arya, Thokchom Subhaschandra Singh
Summary: This paper investigates the viability of microalgae as a replacement feedstock for compression ignition engines. The characteristics of various diesel fuel alternatives and their blends with diesel were studied. The findings show that the use of MAME20D80 and KA20D80 in diesel engines is viable.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Energy & Fuels
M. Gowthama Krishnan, Sundararajan Rajkumar
Summary: The study found that in dual fuel combustion, adjusting the start of injection and implementing exhaust gas recirculation can effectively reduce nitrogen oxide emissions. Compared to conventional combustion mode, significant reductions in NOx emissions were achieved, around 50%, for diesel and biodiesel, recommending the use of a start of injection at 25 degrees before top dead center and 10% EGR.
Article
Energy & Fuels
M. Gowthama Krishnan, Sundararajan Rajkumar
Summary: The study investigated the impact of start of injection (SOI) and exhaust gas recirculation (EGR) on reducing NOx emissions in dual fuel combustion (DFC). It was found that retarding SOIs and implementing 10% EGR led to significant reductions in NOx emissions for diesel, B20, and B100 fuels, compared to conventional combustion mode. Overall, DFC with a SOI of 25 degrees CA before top dead center and 10% EGR was identified as suitable operating conditions for emission reduction.
Article
Thermodynamics
Bahram Jafari, Mahdi Seddiq, Seyyed Mostafa Mirsalim
Summary: This research shows that increasing syngas energy ratio and adjusting diesel injection timing can effectively reduce emissions and improve engine performance. However, increasing syngas ratio may also lead to higher combustion and heat transfer losses.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Jun Cong Ge, Jung Young Kim, Byeong O. Yoo, Jun Hee Song
Summary: This study aims to investigate and compare the effects of different diesel-bioethanol-biodiesel ternary mixture fuels on combustion and emissions from a four-cylinder diesel engine. The results show that the addition of ethanol can improve combustion, effectively control NOx and smoke emissions. Therefore, ethanol will play an important role in the future research field of energy saving and emission reduction for diesel engines.
Article
Green & Sustainable Science & Technology
S. Saravanan, R. Kaliyanasunder, B. Rajesh Kumar, G. Lakshmi Narayana Rao
Article
Energy & Fuels
Saravanan Subramani, Ravi Govindasamy, G. Lakshmi Narayana Rao
Article
Energy & Fuels
Justin Jacob Thomas, C. Manojkumar, V. R. Sabu, G. Nagarajan
Article
Thermodynamics
Justin Jacob Thomas, V. R. Sabu, G. Nagarajan, Suraj Kumar, G. Basrin
Article
Energy & Fuels
Murugan Rangasamy, Ganesh Duraisamy, Nagarajan Govindan
Article
Green & Sustainable Science & Technology
Saravanan Subramani, Kaliyanasunder Ramasamy
Summary: The study focused on simultaneously controlling NOx and smoke emissions of compression ignition engines by modifying the combustion process to partially premixed charge combustion (PPCC). Experimental results showed that the main injection fuel is the most influencing factor on emissions, while normal combustion mode parameters have a greater impact on combustion efficiency. Additionally, fuel factors were found to have a higher contribution to emissions compared to design factors.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Energy & Fuels
Saravanan Subramani, Krishnamoorthy Natarajan, Lakshmi Narayana G. Rao
Summary: The study investigated the effect of adding antioxidants to algae biodiesel blend on emission control of a compression ignition engine. Results showed that BHT played a significant role in reducing engine NOx emissions when fueled with algae biodiesel blend, followed by injection timing.
Article
Energy & Fuels
Saravanan Subramani, Ravi Govindasamy
Summary: This study aimed to optimize the design and fuel factors of a direct injection compression ignition engine in order to reduce NOx and smoke emissions while improving performance. The analysis revealed that the percentage of biodiesel in the blend and EGR had a smaller contribution compared to other factors, and propanol had the least impact on NOx, smoke, and BTE among the higher alcohols tested.
Article
Energy & Fuels
Justin Jacob Thomas, V. R. Sabu, G. Basrin, G. Nagarajan
Summary: This study suggests that using hexanol as an alternative fuel to diesel can reduce nitrogen oxides and smoke emissions, as well as increase engine combustion efficiency. The research found that increasing the percentage of hexanol at the same injection pressure can enhance the engine's peak pressure and heat release rates.
Article
Energy & Fuels
Anchupogu Praveen, R. L. Krupakaran, G. Lakshmi Narayana Rao, B. Balakrishna
Summary: The dispersion of titanium dioxide nanoparticles into biodiesel blend was found to enhance fuel properties and engine performance, leading to reduced emissions of CO, HC, and smoke while increasing BTE and decreasing BSFC.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Article
Thermodynamics
Justin Jacob Thomas, G. Nagarajan, V. R. Sabu, C. Manojkumar, Vikas Sharma
Summary: This study investigates the operation of a low-temperature reactivity controlled compression ignition (RCCI) engine using fuel derived from agro/food industry waste. The use of residual cooking oil (RCOB) and n-hexanol as high reactivity fuel (HRF) and low reactivity fuel (LRF), respectively, shows promising results in terms of reduced smoke and NO emissions, as well as improved thermal efficiency.
Article
Transportation Science & Technology
Murugan Rangasamy, Ganesh Duraisamy, Nagarajan Govindan, Yogesh Vaidhyanathan, Balakumar Sellamuthu
Summary: Using both methanol and dimethyl ether as fuels in RCCI combustion demonstrates higher thermal efficiency and lower emissions, with the need for a dedicated fuel supply system for DME. The possibility of using EGR to extend the load range of RCCI combustion by reducing NO emissions is promising.
SAE INTERNATIONAL JOURNAL OF ENGINES
(2022)
Article
Thermodynamics
Kavin Robert Mohanasundaram, Nagarajan Govindan
Summary: The experimental study investigated the effects of intake air pre-heating, exhaust gas re-circulation, and hydrogen enrichment on the performance, combustion, and emission characteristics of a dual fuel mode engine using CH4/waste cooking oil biodiesel. Results showed that increasing the energy share of gaseous fuel extended the ignition delay, with higher CO and HC emissions in CH4 combustion compared to conventional diesel operation. However, improvements in thermal efficiency, reduced CO and HC emissions, and lower NOx emissions were observed with hydrogen-enriched CH4 combustion.
Article
Transportation Science & Technology
Murugan Rangasamy, Ganesh Duraisamy, Nagarajan Govindan
SAE INTERNATIONAL JOURNAL OF ENGINES
(2020)
Article
Energy & Fuels
V. Edwin Geo, G. Nagarajan, B. Nagalingam, Fethi Aloui, Mohand Tazerout
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
