Article
Energy & Fuels
Muteeb ul Haq, Ali Turab Jafry, Muhammad Salman Abbasi, Muhammad Jawad, Saad Ahmad, Taqi Ahmad Cheema, Naseem Abbas
Summary: Fuel spray characteristics have a significant impact on engine performance and emissions. This study investigates the spray behavior of castor and jatropha biodiesel using numerical and experimental methods. The results show that the KHRT and TAB models provide better estimations of the spray penetration length and spray cone angle.
Article
Energy & Fuels
Zhijun Wu, Wei Xie, Yang Yu, Liguang Li, Jun Deng
Summary: Water injection technology is crucial for solving knocking issues in internal combustion engines, with potential to improve atomization quality, formation of fuel-air mixture, and combustion without costly engine modifications. Research on spray development of gasoline and water-in-gasoline mixtures revealed changes in spray characteristics as temperature increased, impacting spray penetration, cone angle, area, energy for atomization, and particle size distribution.
Article
Thermodynamics
Muteeb ul Haq, Ali Turab Jafry, Saad Ahmad, Taqi Ahmad Cheema, Muhammad Kamran, Huma Ajab, Haji Hassan Masjuki
Summary: This study investigates the effect of butanol and 1-butoxybutane on castor biodiesel and analyzes the spray performance. The results show that the quaternary blend with 10% butanol and 1-butoxybutane has the closest spray performance to diesel, and it also exhibits better fuel consumption and thermal efficiency.
Review
Energy & Fuels
Muteeb Ul Haq, Ali Turab Jafry, Saad Ahmad, Taqi Ahmad Cheema, Munib Qasim Ansari, Naseem Abbas
Summary: Spray characteristics are crucial for the performance and emissions of compression ignition engines. This study investigates the impact of fuel properties and injection conditions on spray characteristics. Higher injection pressures result in longer penetration lengths, better atomization, and reduced mean diameter. Liquid properties and structural properties play vital roles in the spray formation of fuel blends.
Article
Materials Science, Coatings & Films
Debbie Hwee Leng Seng, Zheng Zhang, Zhi-Qian Zhang, Tzee Luai Meng, Siew Lang Teo, Boon Hee Tan, Qizhong Loi, Jisheng Pan, Te Ba
Summary: The influence of spray angles and particle velocities on cold spray deposition of IN718 powders was investigated. Particle velocity was found to have a greater impact on coating porosity compared to spray angle. The lowest porosity and surface roughness but highest compressive surface residual stress were achieved with a spray angle of 50 degrees and particle velocity of 920 m/s. Changing the spray angle had a greater influence on deposition efficiency.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Thermodynamics
Jhe-Kai Lin, Warit Abi Nurazaq, Wei-Cheng Wang
Summary: This study experimentally measured the spray characteristics of sustainable aviation fuel (SAF) using an optical constant volume combustion chamber. The results showed that spray penetration, spray angle, and spray volume were influenced by ambient temperature, injection pressure, and ambient pressure.
Article
Mechanics
Lin Ye, Hao Guo, Yinhai Zhu, Peixue Jiang
Summary: A three-dimensional compressible large eddy simulation (LES) method was used to study the flow and heat transfer characteristics in a crossflow film cooling model. The effects of crossflow on the flow field and film cooling effectiveness of different types of film holes, such as cylindrical holes and diffusion slot holes, were analyzed. The results showed the induction of helical motion in the holes under crossflow. Asymmetric outlet flow behavior was observed downstream due to the influence of crossflow. The blowing ratio affected the strength of the vortex inside the hole. For the diffusion slot hole, the high-speed zone at the hole-inlet gradually evolved into strip shapes under axial extrusion and spanwise diffusion. The film cooling effectiveness of the diffusion slot hole was less affected by the inlet crossflow and Reynolds number, and lateral diffusion capacity increased with the blowing ratio. The instantaneous film fluctuation region of the diffusion slot hole was smaller and more symmetrical compared to the cylindrical hole.
Article
Materials Science, Characterization & Testing
Gopal Kumar Deshmukh, Ameenur Rehman, Rajesh Gupta
Summary: The increasing demand for energy due to the rise in vehicles with internal combustion engines has raised concerns in industrial and automotive fields about fossil fuel depletion, environmental issues, and energy conservation. This has driven the world to explore alternative sources of energy. The use of biodiesel as engine fuel has prompted researchers to regulate emissions and enhance engine performance.
JOURNAL OF TESTING AND EVALUATION
(2021)
Article
Engineering, Chemical
Deqing Mei, Yu Fang, Derick Adu-Mensah, Weiyi Cai, Yinnan Yuan
Summary: By combining experiment and simulation, the spray characteristics of CeO2 nano-fuels and diesel were investigated. Nano-fuels show different spray characteristics compared to diesel, with longer penetration distance, smaller cone angle, and larger SMD. The differences between nano-fuel and diesel spray characteristics increase with the increase of mass concentration. The injection pressure, ambient pressure, and mass concentration all have effects on spray characteristics, with injection pressure having the greatest impact.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Debbie Hwee Leng Seng, Zheng Zheng, Zhi-Qian Zhang, Tzee Luai Meng, Siew Lang Teo, Boon Hee Tan, Qizhong Loi, Jisheng Pan
Summary: This study investigated the influence of spray angle on the quality of Ti64 coatings deposited by cold spray (CS). It was found that spray angle is an effective process parameter to control porosity, pore alignment, and extent of surface compressive residual stress in the CS deposited materials.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Energy & Fuels
Nguyen Ho Xuan Duy, Ocktaeck Lim
Summary: Spray characteristics were evaluated in this study to understand the influence of temperature on the non-vaporizing spray process. The experimental matrix included varying factors such as chamber temperature, fuel injection pressure, and chamber gas density. The results showed that as chamber temperature increased, the spray penetrated the chamber wall limit more quickly.
Article
Engineering, Mechanical
Nguyen Ho Xuan Duy, Ocktaeck Lim
Summary: This paper presents a study on the spray characteristics of a gasoline-biodiesel fuel mixture in a constant volume combustion chamber. The effects of injection pressure, ambient gas density, and injection duration on spray development, penetration length, cone angle, and spray area were evaluated. The results show that increasing injection pressure and reducing ambient gas density affect the spray formation rate and stability. The composition of biodiesel in the fuels also influences the viscosity properties and spray area. Optical modeling and image processing algorithms were used to analyze the spraying process.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shuo Yin, Jan Cizek, Jan Cupera, Mostafa Hassani, Xiaotao Luo, Richard Jenkins, Yingchun Xie, Wenya Li, Rocco Lupoi
Summary: The experimental investigation explored the formation conditions and mechanisms of the unexplained intermixing phenomenon at the substrate-coatings interface. Severe plastic deformation at the interface is crucial for intermixing, with low deposition efficiency and material properties identified as critical factors. The hypothesis of the intermixing interface formation mechanism is proposed based on the experimental analyses.
MATERIALS & DESIGN
(2021)
Article
Thermodynamics
Joanna Grochowalska, Piotr Jaworski, Lukasz Jan Kapusta, Jerzy Kowalski
Summary: This paper aims to develop a model of diesel fuel spray for the early stage of fuel spray in marine diesel engines, considering technical aspects such as nozzle diameter and backpressure. Experimental studies were conducted to propose a new model for fuel spray parameters, with lower error than existing models. The research highlights the importance of the early stage of fuel spray evolution for self-ignition in marine diesel engines.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Plant Sciences
Shiqun Dai, Mingxiong Ou, Wentao Du, Xuejun Yang, Xiang Dong, Li Jiang, Tie Zhang, Suming Ding, Weidong Jia
Summary: Air-assisted spraying technology is used in orchard sprayers to increase spray penetration and reduce droplet drift by disturbing canopy leaves and forcing droplets into the plant. In this study, a low-flow air-assisted sprayer with a self-designed nozzle was developed, and its effectiveness was tested in a vineyard. The optimal working conditions for the sprayer were determined, and the deposit coverage, spray penetration, and deposit distribution were evaluated.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Thermodynamics
Hugo Ajrouche, Ob Nilaphai, Camille Hespel, Fabrice Foucher
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Pierre Brequigny, Charles Endouard, Fabrice Foucher, Christine Mounaim-Rousselle
COMBUSTION SCIENCE AND TECHNOLOGY
(2020)
Article
Energy & Fuels
Tung Lam Nguyen, Camille Hespel, Dinh Long Hoang, Christine Mounaim-Rousselle
Article
Thermodynamics
A. Roque, J. Helie, F. Foucher
Summary: The study found that the injection pressure and impingement-surface temperature have a significant impact on the combustion chamber deposit (CCD) inside a constant volume combustion chamber. Regardless of the injection pressure, the maximum production of CCD occurred at a wall temperature of 393 K, with an additional increase in temperature reducing the build-up rate of CCD.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Minh Duy Le, Mickael Matrat, Arij Ben Amara, Fabrice Foucher, Bruno Moreau, Yi Yu, Pierre-Alexandre Glaude
Summary: The study investigates the effect of ferrocene on combustion of low-octane gasoline, finding it has a strong inhibiting effect on main ignition and enhances negative temperature coefficient behavior. The kinetic model can reasonably simulate the inhibiting effect of ferrocene, highlighting differences in impact compared to the conventional reactivity enhancer EHN.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Zhaojing Ni, Camille Hespel, Kai Han, Fabrice Foucher
Summary: This study investigates the impact of non-ideal vapor-liquid equilibrium on the heating and evaporation of ethanol/heptane binary droplets. Non-ideal behavior has a more pronounced effect on evaporation and temperature evolution for droplets with initial heptane mass fractions of 25% and 50%. Liquid phase composition is a key factor in determining the evaporation order of components in the mixture, and the influence of non-ideal behavior is attenuated under high ambient temperature and pressure conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Zhaojing Ni, Camille Hespel, Kai Han, Fabrice Foucher
Summary: A droplet evaporation model was developed based on the direct numerical method and high-fidelity interface capturing methodology to simulate the evaporation process under high-temperature convective conditions. Convection was found to disrupt the uniform distribution of temperature and concentration. Increasing ambient temperature promoted droplet volume reduction rate but restrained convective heat and mass transfer rates.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Zhaojing Ni, Camille Hespel, Kai Han, Fabrice Foucher
Summary: The transient evaporation characteristics of free-falling ethanol droplets under ambient temperatures of 373-473 K were investigated using the rainbow technique. It was found that the rainbow signal shifted to lower scattering angles with increasing ambient temperature, and larger droplets tended to have more peaks within the same scattering angle range. The experimentally obtained variation trend of diameter and equivalent temperature matched well with simulation results, but there were discrepancies in temperatures between experimental measurements and model predictions due to temperature gradient effects.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2022)
Article
Thermodynamics
M. Di Lorenzo, P. Brequigny, F. Foucher, C. Mounaim-Rousselle
Summary: The downsized spark ignition engine is a promising technology for reducing pollutants and greenhouse gas emissions by increasing the efficiency through boosting the intake air pressure. However, modeling the combustion process under drastic conditions of high pressure, high temperature, and high dilution rate remains challenging.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Nesrine Belhadj, Zahraa Dbouk, Maxence Lailliau, Roland Benoit, Bruno Moreau, Fabrice Foucher, Philippe Dagaut
Summary: This study extends the previous research on the oxidation of di-n-butyl ether (DBE) to include its oxidation in a motored homogeneous charge compression ignition engine. The study reveals that despite the different experimental conditions, the oxidation mechanism of DBE remains similar and leads to the formation of the same chemical products.
Article
Energy & Fuels
Camille Hespel, Chetankumar Patel, Tung Lam Nguyen, Ob Nilaphai, Christine Mounaim-Rousselle
Summary: This study explores the potential use of ABE mixture as an alternative fuel for CI engines. The experiment showed that increasing the ABE and Butanol concentration in the blends led to a longer ignition delay and lift-off length, as well as a decrease in soot concentration. The blends with the lowest ABE or Butanol content exhibited similar combustion characteristics to n-dodecane, making them suitable substitutes for diesel without any engine modifications.
Article
Energy & Fuels
Camille Hespel, Moez Ben Houidi, Hugo Ajrouche, Fabrice Foucher, Yahia Haidous, Bruno Moreau, Ob Nilaphai, Christine Rousselle, Marc Bellenoue, Alain Claverie, Julien Sotton, Camille Strozzi, Michele Bardi, Gilles Bruneaux, Louis-Marie Malbec
OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES
(2020)
Article
Energy & Fuels
Moez Ben Houidi, Camille Hespel, Michele Bardi, Ob Nilaphai, Louis-Marie Malbec, Julien Sotton, Marc Bellenoue, Camille Strozzi, Hugo Ajrouche, Fabrice Foucher, Bruno Moreau, Christine Rousselle, Gilles Bruneaux
OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES
(2020)
Article
Energy & Fuels
Chetankumar Patel, Camille Hespel, Tung Lam Nguyen, Fabrice Foucher, Christine Mounaim-Rousselle
OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES
(2020)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.
