Article
Energy & Fuels
Narankhuu Jamsran, Hyunwook Park, Junsun Lee, Seungmook Oh, Changup Kim, Yonggyu Lee, Kernyong Kang
Summary: This study experimentally investigated the effects of various syngas compositions on combustion and emissions of a homogeneous charge compression ignition (HCCI) engine. The results showed that a syngas composition with high H2 content and low CO content was favorable for improving thermal efficiency and load extension of the engine.
Article
Energy & Fuels
Narankhuu Jamsran, Hyunwook Park, Junsun Lee, Seungmook Oh, Changup Kim, Yonggyu Lee, Kernyong Kang
Summary: HCCI combustion with different syngas compositions was studied, showing that higher H2 content in the fuel can facilitate fast burning and good combustion stability. The NOx emissions were very low due to the ultra-lean, diluted charge used for HCCI combustion.
Article
Energy & Fuels
Aneesh Vijay Kale, Anand Krishnasamy
Summary: This study aims to extend the operating load range of a diesel engine in HCCI mode by using high volatile, optimum reactivity fuel. The results show that increasing the content of diisopropyl ether in fuel blends can improve the indicated thermal efficiency, but also increase the emissions of unburned hydrocarbon and carbon monoxide.
Article
Energy & Fuels
Masoud Rabeti, Ali Akbar Ranjbar, Omid Jahanian, Seyed Mohammad Safieddin Ardebili, Hamit Solmaz
Summary: Homogeneous charge compression ignition (HCCI) engine shows potential as an alternative to traditional internal combustion engines due to its high thermal efficiency and low emissions. This study compared the accuracy of different heat transfer models and found that Assanis and Hohenberg models performed the best in estimating heat transfer in an HCCI engine. The engine operating parameters, such as intake pressure, equivalence ratio, and engine speed, were found to have significant impacts on heat flux.
Article
Energy & Fuels
Chang Hee Byun, Jong Tai Lee, Oh Chae Kwon
Summary: The self-ignition and knocking characteristics of hydrogen-fueled homogeneous compression charge ignition (HCCI) engines without carbon emissions were studied experimentally. The study used a rapid compression expansion machine (RCEM) and explored various compression ratio (e) and fuel-equivalence ratio (0) conditions without preheating the intake air. The results showed that self-ignition occurred at 0 = 0.42 and e = 22.0, even though the theoretical self-ignition e was 27.5. Knocking was observed at different frequencies in the frequency domain depending on the fuel-equivalence ratio and compression ratio.
Article
Energy & Fuels
Flavio D. F. Chuahy, Tommy Powell, Scott J. Curran, James P. Szybist
Summary: The DOE Co-Optima initiative focuses on the interaction between fuel properties and advanced combustion engines to improve fuel economy. Advanced compression ignition strategies like SACI and PFS show better efficiency and lower emissions, but they have limitations in operating range. These limitations are due to fundamental characteristics of each combustion process and are influenced by factors such as geometry, fuel type, dilution level and mixture preparation.
Article
Thermodynamics
Aneesh Vijay Kale, Anand Krishnasamy
Summary: In this study, experiments were conducted on a modified diesel engine operating in port fuel injected HCCI mode with gasoline-isobutanol blends. It was found that increasing the concentration of isobutanol in the fuel blends improved the engine's load range, performance, and reduced emissions. Additionally, the addition of a cetane improver, 2-EHN, enabled stable HCCI combustion at lower engine loads.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Jakub Mularski, Leo Lue, Jun Li
Summary: This paper aims to develop a robust zero-dimensional ignition model as an effective tool to quickly estimate the ignition behaviour of biomass fuels. The model is able to accurately distinguish ignition behaviours of different biomass fuels, enabling its use in wider industrial applications.
Article
Energy & Fuels
Sebastian H. Quintana, Andres D. Morales Rojas, Ivan D. Bedoya
Summary: This research explores the use of biogas-fueled HCCI engines for power generation at high altitudes in Colombia. Experimental and numerical results show that the addition of ozone can lower the intake temperature requirements and improve engine performance. The findings are important for the design and implementation of microgeneration systems in developing countries with challenging HCCI combustion conditions.
Article
Energy & Fuels
Remi Demol, Miguel Ruiz, Adam Schnitzer, Olivier Herbinet, Guillain Mauviel
Summary: Among the methods to reduce tar emission, the partial oxidation (POX) of biomass gasification tars has been studied both experimentally and numerically. The POX unit demonstrated the ability to reduce tar levels by 60 to 90%, with lighter tars almost completely eliminated. The model provided relatively accurate predictions of the hydrocarbon species variations.
Review
Energy & Fuels
Praveen Kumar Ghodke, Amit Kumar Sharma, Arun Jayaseelan, K. P. Gopinath
Summary: The increasing global population growth, modernization, and industrialization have led to a significant rise in energy consumption, resulting in worsened climate conditions and greenhouse gas emissions. As a result, researchers are exploring eco-friendly and sustainable energy sources, with hydrogen (H2) emerging as a clean and carbon-free future energy carrier. Thermochemical routes and the use of lignocellulosic biomass have shown great potential for sustainable H2 production. This study provides an overview of advancements in gasification technologies, operating conditions, catalysts, and emerging technologies for improving H2-rich syngas production.
Article
Engineering, Chemical
Kristiano Prifti, Andrea Galeazzi, Flavio Manenti
Summary: Chemical recycling of plastic waste is a topic of high interest due to the inefficiency of waste management and the increasing production of polymers each year. Gasification, as a potential treatment, offers the synthesis of chemicals with advantages such as autothermal conditions and robustness to contaminants. This paper proposes a concept for gasification recycling, validated by experimental campaigns in a demo-scale plant, to estimate methanol synthesis yield. The economic performance of the plant at different scales is evaluated through net present value, internal rate of return, and payback time analysis.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Mechanical
Wonah Park
Summary: Naphtha has gained attention as a fuel suitable for advanced combustion strategies, which can improve thermal efficiency and reduce exhaust gas emissions. With lower refining costs and CO2 emissions, naphtha is a solution for the imbalance between gasoline and diesel fuels in internal combustion engines.
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY
(2021)
Article
Energy & Fuels
Wenhua Yuan, Xueliang Huang, Jun Fu, Yi Ma, Guangming Li, Qike Huang
Summary: This study investigates the effects of water vapor blending ratio on H-2 HCCI through numerical simulation, showing that water vapor can reduce peak combustion temperature and pressure, alleviate detonation phenomenon, and decrease power output and NOx emissions.
Article
Thermodynamics
Isabelly P. Silva, Rafael M. A. Lima, Hortencia E. P. Santana, Gabriel F. Silva, Denise S. Ruzene, Daniel P. Silva
Summary: This study aimed to improve the prediction of gasification system behavior by developing and applying empirical correlations for tar, coal, and methane, resulting in models that better described experimental results compared to traditional models.
Article
Thermodynamics
Krishna Prasad Shrestha, Charles Lhuillier, Amanda Alves Barbosa, Pierre Brequigny, Francesco Contino, Christine Mounaim-Rousselle, Lars Seidel, Fabian Mauss
Summary: This study experimentally investigated the laminar flame speeds of ammonia and ammonia-hydrogen blends under different temperature, pressure, and oxygen content conditions, and developed a new kinetic model for predicting the oxidation mechanisms, considering the formation and reduction of nitrogen oxides. The results showed that the laminar flame speed increases with increasing initial temperature, fuel hydrogen content, or oxidizer oxygen content, but decreases with increasing initial pressure. The proposed kinetic model predicts the same trends as experiments and highlights the importance of N2H2 formation under rich conditions.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Charles Lhuillier, Pierre Brequigny, Francesco Contino, Christine Mounaim-Rousselle
Summary: The study aims to elucidate the combustion characteristics of ammonia blends under engine-relevant turbulent conditions, finding that the effects of hydrogen or methane enrichment observed in SI engines cannot be fully explained by the measured laminar burning velocities. The combustion regimes studied are at the boundary between thin and broken reaction zones, influenced by flame-turbulence interactions.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Environmental Sciences
Francois Boveroux, Severine Cassiers, Philippe De Meyer, Pascal Buekenhoudt, Benjamin Bergmans, Francois Idczak, Herve Jeanmart, Sebastian Verhelst, Francesco Contino
Summary: The study found that particle number emission factors measured at low idle show a high correlation with those obtained during homologation cycles or real-driving emission measurements. Additionally, the average Particle Number (PN) emission factors are highly impacted by high emitters in the fleet and the mileage of the vehicles.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Thermodynamics
Diederik Coppitters, Ward De Paepe, Francesco Contino
Article
Engineering, Mechanical
Ward De Paepe, Alessio Pappa, Diederik Coppitters, Marina Montero Carrero, Panagiotis Tsirikoglou, Francesco Contino
Summary: The study provides a detailed analysis of the recuperator performance under humidified conditions using averaged experimental data and applying support vector regression (SVR) to improve accuracy. Despite increased total exchanged heat flux, the recuperator is found to be too small to fully exploit the potential of humidification.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Jarl Beckers, Tom Verstraten, Bjorn Verrelst, Francesco Contino, Joeri Van Mierlo
Summary: This paper proposes a new design of a slider-crank mechanism, which achieves continuous movement and minimizes the loads transmitted through the mechanical structure through local linear actuation. The study indicates that operating at the resonance frequency of the system yields optimal results.
MECHANISM AND MACHINE THEORY
(2021)
Article
Energy & Fuels
Xavier Rixhon, Gauthier Limpens, Diederik Coppitters, Herve Jeanmart, Francesco Contino
Summary: Wind and solar energies face a challenge of time and space disparity leading to a mismatch between supply and demand, which can be addressed by electrofuels like hydrogen, methane, and methanol. However, the uncertainties and costs associated with electrofuels may influence the total costs of future energy systems.
Article
Thermodynamics
Diederik Coppitters, Ward De Paepe, Francesco Contino
Summary: This study considers the effects of limited information on the natural variability through probability-boxes, finding the least-sensitive designs to natural variability and effective actions to reduce the effects of limited information. The photovoltaic-battery-heat pump configuration achieves higher robustness towards aleatory uncertainty, while clarifying the grid electricity contract and adopting specific energy demand profiles are key actions to determine the true-but-unknown performance and robustness of the optimized designs.
Article
Thermodynamics
Kevin Verleysen, Alessandro Parente, Francesco Contino
Summary: The development of a sustainable energy sector relies on the safe management of energy transportation and storage. Producing an energy carrier like ammonia for large-scale storage of renewable energy is crucial, but attention must be paid to the stability of the ammonia reactor and the impact of uncertainties on performance. Inlet temperature has the most significant impact on ammonia production standard deviation, and more precise control over it can reduce this impact.
Article
Computer Science, Interdisciplinary Applications
S. Tipler, G. D'Alessio, Q. Van Haute, A. Parente, F. Contino, A. Coussement
Summary: This research highlights the importance of using predictive methods when measuring RON and MON at a low price. Through the investigation of 41 parameters and the application of PCA and ANN, the study identified the inherent links between fuel properties and RON/MON.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Kevin Verleysen, Alessandro Parente, Francesco Contino
Summary: Ammonia serves as a crucial energy vector for storing and releasing excess renewable energy. However, the current synthesis process lacks flexibility, requiring large hydrogen storage tanks. To reduce tank capacity, optimizing the dynamic power-to-ammonia process under renewable uncertainty is necessary.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Thermodynamics
Kun Wu, Francesco Contino, Xuejun Fan
Summary: To overcome the challenges of simulating reactive flow in supersonic combustion, on-the-fly mechanism reduction using dynamic adaptive chemistry (DAC) is necessary. This study investigates the influential factors of mechanism reduction methods, error threshold values, and search initiating species for high fidelity simulation of supersonic combustion. The results show that all four mechanism reduction methods are adequate for global performance prediction, while the DRGEP method achieves the best balance between accuracy and efficiency. The error threshold value should not exceed 10(-4) for high fidelity simulations. The combination of stable species incurs larger errors in radical mass fraction prediction but is more computationally efficient than including intermediate species. The computational overheads for mechanism reduction are mainly determined by the CPU time for solving the simplified ODE system.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Paolo Thiran, Herve Jeanmart, Francesco Contino
Summary: Studying a large number of scenarios and using complex energy system models are necessary for considering uncertainty and integrating renewable energy sources. Typical days clustering technique can accurately approximate the full-year time series while maintaining computational tractability. However, its impact on energy system models, especially for multi-regional whole-energy systems, has rarely been studied. In this study, the EnergyScope Multi-Cells model is used to optimize multiple interconnected regions, and a design error metric is developed to find trade-offs between accuracy and computational cost. Results show that using 10 typical days reduces computational time by 8.6 to 23.8 times with a design error below 17%. Time series error is a good predictor of design error in all cases studied, suggesting that it can be used as an a priori metric for selecting the number of typical days without running the optimization model.
Review
Thermodynamics
Francesco Contino, Stefano Moret, Gauthier Limpens, Herve Jeanmart
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2020)
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.
