Article
Energy & Fuels
Zengna Wei, Yuxin Zhang, Qi Xia, Yichi Liu, Yuanli Xu
Summary: The study revealed that an increase in ESR significantly increases the in-cylinder pressure, gas temperature, and maximum pressure rise rate, while the addition of EGR decreases these parameters. Both ESR and EGR have implications on emissions, with EGR leading to lower NOx but higher soot, HC, and CO levels. The results highlight the complex interactions between ESR, EGR, combustion, and emissions in high-loaded RCCI engines.
Article
Chemistry, Physical
F. Ekin, O. A. Ozsoysal, H. Arslan
Summary: Alternative fuels, such as natural gas and hydrogen, are crucial for improving performance and reducing emissions in engines. This study investigated the effects of adding hydrogen to a natural gas-diesel dual fuel engine using numerical simulations. The results showed that the addition of hydrogen in appropriate proportions improved performance and reduced emissions. However, increasing the diesel fuel injection advance and the hydrogen ratio had negative effects on engine performance and emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Stanislaw Szwaja, Michal Gruca, Michal Pyrc
Summary: This paper presents the investigation results on a new type of renewable fuel for automotive and power industry. The ethanol-glycerol blend at the ratio of 3:1 is found to be a feasible substitute for gasoline or ethanol in internal combustion engines, with comparable toxic emissions levels and less than 3% deterioration in engine performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Review
Energy & Fuels
S. T. P. Purayil, Mohammad O. Hamdan, S. A. B. Al-Omari, M. Y. E. Selim, E. Elnajjar
Summary: Rapid depletion of conventional fossil fuels and increasing environmental concern have led to an urgent need for research on finding an alternative fuel with minimal environmental impacts. Hydrogen is considered as an important fuel for the future, as it addresses the aforementioned pressing issues. This review critically analyzes the combustion performance, emission, and cyclic variation characteristics of a hydrogen-gasoline dual fuel engine. According to scientific literature, hydrogen-gasoline dual fuel engines exhibit good thermal efficiency at low and partial loads, but their performance deteriorates at high loads.
Article
Energy & Fuels
Zhongshu Wang, Fangyuan Zhang, Ye Xia, Dan Wang, Yun Xu, Guizhi Du
Summary: This study investigated the impact of pilot diesel injection timing on combustion phases of diesel and natural gas in a dual fuel engine, showing that injection timing plays a crucial role in determining engine thermal efficiency and exhaust emissions level. The results revealed a clear correspondence between the lengths of combustion period of two fuels, with advancing pilot diesel injection resulting in shortened combustion durations and increased combustion overlap periods.
Article
Thermodynamics
Messaoud Abdelalli Benbellil, Mohand Said Lounici, Khaled Loubar, Mohand Tazerout
Summary: This study investigates the effects of natural gas enrichment with high H2 concentrations on combustion characteristics, engine performance, exhaust emissions, and knock in a compression ignition engine. The results demonstrate that adding H2 to NG can improve the combustion process and enhance engine efficiency, but it may have limitations in reducing NOx emissions.
Article
Energy & Fuels
Zhenting Liu, Liping Yang, Enzhe Song, Jiaqi Wang, Ali Zare, Timothy A. Bodisco, Richard J. Brown
Summary: In this paper, a four-component reduced mechanism was proposed for predicting combustion characteristics and emissions from natural gas-diesel dual fuel engines. The validation of the reduced mechanism showed good performance under different reaction conditions. The effects of cross-reactions on ignition were more pronounced in medium and low temperatures, but not significant at high temperatures.
Article
Energy & Fuels
Jinbao Zheng, Zhaoyang Hao, Duidui Wang, Yage Di, Haiyong Peng, Tao Wu, Xuelong Miao
Summary: Diesel injection plays a significant role in the mixing process of dual-fuel engine. A diesel nozzle with double-layer hole and a narrow spray angle can enhance air utilization and improve combustion efficiency. However, the narrow spray angle nozzle has lower thermal efficiency at high load conditions.
Article
Energy & Fuels
Jinbo Qu, Yongming Feng, Guodong Xu, Ming Zhang, Yuanqing Zhu, Song Zhou
Summary: This paper proposes a system consisting of a fuel reformer and a high-pressure EGR natural gas engine to achieve a balance between fuel efficiency and emission control. Through this system, engine efficiency can be improved while reducing methane slip and controlling NOx emissions, saving costs and meeting the IMO Tier III standards.
Article
Energy & Fuels
Long Liu, Yue Wu, Yang Wang
Summary: This study revealed the unique knock characteristics and mechanism of large-bore natural gas dual-fuel marine engine, indicating that the uneven pressure distribution and heat release caused by flame jet and strong swirl are the main reasons for knock. A knock suppression method by reducing the pilot fuel was proposed based on the knock mechanism.
Article
Thermodynamics
Jayashish Kumar Pandey, M. H. Dinesh, G. N. Kumar
Summary: IC engines, the backbone of transportation sector, are facing energy insecurity and strict environmental norms. Hydrogen and its derivatives are seen as promising options for revival. Comparative study on NH3/H2 and hydrogen shows that NH3/H2 exhibits better combustion and reduced NOx emissions, with some trade-offs in terms of cycle-by-cycle variations and ignition range. Moreover, NH3/H2 is more efficient in controlling NOx compared to hydrogen. However, the study has limitations in quantitative analysis and NH3 emissions, which need further investigation.
Article
Energy & Fuels
Jichao Liang, Quanchang Zhang, Zheng Chen, Zunqing Zheng, Chao Yang, Qixin Ma
Summary: The use of Tetrahydrofuran (THF) and ethanol as co-solvents for diesel fuel can increase combustion efficiency and reduce emissions, especially at low EGR rates, in diesel engine tests.
Article
Energy & Fuels
Christopher J. Ulishney, Cosmin E. Dumitrescu
Summary: This study investigated the use of dual-fuel diesel-NG engines operating at low load conditions. It found that replacing part of the diesel fuel with propane gas mixtures improved engine performance and gaseous fuel oxidation, but also led to increased CO and HC emissions.
Article
Engineering, Chemical
Jianbin Luo, Zhonghang Liu, Jie Wang, Heyang Chen, Zhiqing Zhang, Boying Qin, Shuwan Cui
Summary: The results show that increasing the natural gas mixing ratio decreases cylinder pressure and heat release rate, leading to a reduction in NOx emissions. Using appropriate injection strategies can improve combustion efficiency in the cylinder and alleviate the trade-off relationship between NOx and soot.
Article
Energy & Fuels
Decheng Li, Xiumin Yu, Yaodong Du, Mingjia Xu, Yinan Li, Zhen Shang, Zhe Zhao
Summary: This study investigated the effects of different water ratios in hydrous ethanol on combustion and emissions of hydrous ethanol-gasoline. The results showed that hydrous ethanol prolongs flame development and propagation duration, decreases Tmax and Pmax, and improves torque and brake thermal efficiency. Increasing water content in gasoline/hydrous ethanol dual fuel also leads to higher HC emissions but lower CO and NOx emissions, as well as smaller particle size.
Article
Thermodynamics
Juan J. Hernandez, Magin Lapuerta, Alexis Cova-Bonillo
Summary: A group contribution equation is proposed for predicting the cool flame and main auto-ignition delay time of linear and slightly branched paraffinic fuels, with sufficient accuracy within a certain temperature and pressure range.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Jose Rodriguez-Fernandez, Juan Jose Hernandez, Angel Ramos, Alejandro Calle-Asensio
Summary: The study focuses on the factors influencing the fuel consumption and NOx emissions of a diesel passenger car, finding that high average vehicle velocity can reduce fuel consumption, and that higher engine temperature and an efficient gear shifting strategy can also contribute to energy savings.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
T. A. Z. de Souza, G. M. Pinto, A. A. Julio, C. J. R. Coronado, R. Perez-Herrera, B. O. P. S. Siqueira, R. B. R. da Costa, J. J. Roberts, J. C. E. Palacio
Summary: The economic and population growth in South America has led to increased fuel consumption, prompting the use of biofuels as a more environmentally friendly alternative. Success in producing biodiesel relies on well-established policies and strong local industries, with countries like Brazil, Argentina, and Uruguay leading the way. However, the emergence of Hydrotreated Vegetable Oil (HVO) poses new challenges for the biodiesel industry, potentially impacting its stability and competitiveness in the fuel market.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Environmental Sciences
Amparo Pazo, Magin Lapuerta, Anselmo Acosta, Juan J. Hernandez, Esperanza Monedero
Summary: This study aimed to prevent power plant malfunction caused by feedstock properties by analyzing feedstock and ash samples from a suspension-fired boiler power plant. The research focused on identifying trends in ash composition changes and studying the relationship between ash and feedstock composition to address troublesome deposit formation.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Energy & Fuels
Edwin Santiago Rios Escalante, Christian J. Rodriguez Coronado, Joao Anadrade de Carvalho Junior
Summary: This study experimentally assessed the Lower Flammability Limits (LFLs) of QAV-1/anhydrous ethanol/air mixtures, proposing two analytical expressions and comparing the results with Le Chatelier's rule. The findings showed a slight impact of temperature increase on LFLs under different pressure conditions, and that LFLs from binary blends are influenced by fuel nature and combustion chamber size. Le Chatelier's rule was found to be more suitable for predicting LFLs based on experimental data distribution.
Article
Energy & Fuels
Nan Wang, Xu Dong, Yong Liu, Saifei Zhang, Han Wu, Juan J. Hernandez
Summary: This study experimentally investigated the effects of exhaust gas recirculation (EGR), specifically the effects of CO2 in EGR gases, on the laminar flame characteristics of gasoline fuel. The addition of CO2 was found to suppress the laminar burning velocities (LBV) of the fuel, and the LBV decreased with increasing CO2 dilution ratio. The initial temperature and pressure had different effects on the LBV, with the former promoting and the latter inhibiting. The Markstein length also varied with CO2 dilution ratio, indicating changes in flame instability. Furthermore, the dilution effect was the dominant factor affecting the flame, followed by the chemical effect, while the thermal effect was the least significant but still noteworthy.
Article
Energy & Fuels
Alexis Cova-Bonillo, Rayda Patino-Camino, Juan Jose Hernandez, Magin Lapuerta
Summary: This study analyzes the impact of water concentration in ethanol on the autoignition characteristics of ethanol-diesel blends. The results indicate that water content has little effect on autoignition times in general, but acts as a reactivity inhibitor at low hydrated ethanol contents and as an autoignition enhancer at higher concentrations. The chemical effect associated with water as a third-body becomes more important at higher concentrations.
Article
Green & Sustainable Science & Technology
Rocio Collado, Esperanza Monedero, Victor Manuel Casero-Alonso, Licesio J. Rodriguez-Aragon, Juan Jose Hernandez
Summary: The combustion of almond shells and exhausted olive cake in a domestic boiler was studied to evaluate their suitability as fuels, with almond shells being found more suitable due to their lower emissions and exhausted olive cake leading to poor efficiency and high pollutant emissions at partial load.
Article
Energy & Fuels
Victor M. Dominguez, Juan J. Hernandez, Angel Ramos, Miriam Reyes, Jose Rodriguez-Fernandez
Summary: This study investigates the performance and environmental impact of using hydrogen and methanol as fuels in a heavy-duty compression-ignition engine under dual-fuel combustion. The results show that methanol outperforms hydrogen in various conditions, but hydrogen can substitute a higher percentage of diesel fuel at low loads.
Article
Green & Sustainable Science & Technology
L. F. A. Roque, R. B. R. da Costa, T. A. Z. de Souza, C. J. R. Coronado, G. M. Pinto, A. J. A. Cintra, O. O. Raats, B. M. Oliveira, G. V. Frez, L. F. R. Alves
Summary: Renewable fuels, such as hydrotreated vegetable oil (HVO) and bioethanol, have been used as sustainable options for energy supply. This study conducted a lifecycle assessment comparing the use of diesel, HVO, and bioethanol in a small-scale electricity generator. The results showed that HVO and dual-fuel mode can significantly reduce emissions but also decrease engine efficiency.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Juan J. Hernandez, A. Cova-Bonillo, A. Ramos, H. Wu, J. Rodriguez-Fernandez
Summary: This study aimed to investigate the autoignition characteristics of different alternative diesel-type fuels under dual-fuel operation with H2, NH3, and CH4. The results showed that the type of low reactivity fuel and the nature of the liquid fuel significantly affected the ignition delay time, with ammonia considerably retarding autoignition and biodiesel being less sensitive to the presence of the H2-carrier fuel. Additionally, it was found that the higher the reactivity of the diesel-type fuel, the less influence the gaseous fuel had on the autoignition time.
Article
Chemistry, Physical
G. M. Pinto, T. A. Z. de Souza, R. B. R. da Costa, L. F. A. Roque, G. V. Frez, C. J. R. Coronado
Summary: This study investigates the use of hydrogen port-injection in a four-stroke single-cylinder compression ignition engine operating with renewable diesel-like fuels HVO and farnesane. The results show that hydrogen addition can reduce PM, CO, and CO2 emissions but increase NOx emissions. Moreover, both HVO and farnesane decrease pollutant emissions compared to fossil diesel in single and dual-fuel operations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
G. M. Pinto, R. B. R. da Costa, T. A. Z. de Souza, A. J. A. C. Rosa, O. O. Raats, L. F. A. Roque, G. V. Frez, C. J. R. Coronado
Summary: New fuels like HVO and farnesane have promising combustion properties and can be produced from renewable sources. Technological developments like dual-fuel combustion show potential improvements in efficiency and emissions. This experimental study investigates the combustion, emissions, and performance of a CI engine fueled by HVO and farnesane in dual-fuel mode with natural gas and biogas. Dual-fuel operation slightly increases ignition delay but decreases combustion duration and in-cylinder pressure. Port injection of biogas reduces NOx and PM emissions, but increases CO and HC. Natural gas reduces NOx, PM, and CO2, but increases CO and HC. The use of HVO and farnesane in dual-fuel mode proves to be interesting alternatives to reduce greenhouse gas emissions. Farnesane shows the highest brake thermal efficiency, followed by HVO and diesel. The addition of CNG and biogas reduces brake thermal efficiency.
Article
Environmental Sciences
Gabriel Pinto, Tulio de Souza, Christian Coronado
Summary: With the increasing number of air conditioning units, an increase in electricity consumption in tropical regions has been noticed, inducing peak loads that can damage the energy supply system. This research aims to verify the technical viability of a solar absorption cooling system to promote thermal comfort in a building located in a Brazilian public university. Through a theoretical analysis of a parabolic trough collector with Therminol VP1 as heat exchanger fluid, energy and exergy analyses of the cooling system were carried out, allowing the evaluation of its performance.
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
(2022)
Article
Thermodynamics
Yaqing Bo, Han Wu, Juan J. Hernandez, Zhicheng Shi, Weiren Cao, Xiangrong Li
Summary: This study systematically analyzes the effects of the distance between the cold wall and spray nozzle on the spray and ignition characteristics of diesel engines. The results showed that the cold wall has little influence on ignition when the wall distance is larger, but delays chemical reactions and causes misfires when the wall distance is smaller. Varying wall distance also changes the timing of local fuel cooling, resulting in different effects.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)
