Article
Chemistry, Physical
Xiumin Yu, Zhipeng Hu, Zezhou Guo, Decheng Li, Tianqi Wang, Yinan Li, Jufang Zhang, Tianyang Gong, Yanwei Li
Summary: Ethanol, a carbon-neutral fuel, is widely used in engines. Combining hydrous ethanol with hydrogen can reduce costs and improve combustion performance, especially under lean-burn conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Ruihan Ge, Erjiang Hu, Xiaoxin Yao, Chenglong Tang, Zuohua Huang
Summary: This experimental study investigates the effects of ignition timings, injection pressures, and hydrogen enrichment on ethanol stratified ultra-lean combustion. The results show that the addition of hydrogen increases the stable ignition limit and improves combustion characteristics. However, delayed ignition timings and high injection pressures may result in incomplete combustion.
Article
Energy & Fuels
Chun Xia, Tingyu Zhao, Junhua Fang, Lei Zhu, Zhen Huang
Summary: Improving thermal efficiency and reducing particulate matter emissions are key issues for next generation gasoline engines due to stricter fuel consumption and emission regulations. This study proposes the use of a dual injection stratified combustion mode to improve the burning rate of lean burn and reduce fuel consumption. By optimizing engine control parameters, significant reductions in fuel consumption and particulate emissions can be achieved, making this technique a promising solution.
FRONTIERS IN ENERGY
(2022)
Article
Energy & Fuels
Enrico R. Malheiro de Oliveira, Caio Henrique Rufino, Pedro Teixeira Lacava
Summary: This study provides an experimental analysis of spray guided direct injection with commercial fuels used in a consolidated market for the use of ethanol. The results indicate that lean combustion can lead to flame instabilities, increased unburned ethanol in exhaust emissions, and reduced engine performance. The study highlights the importance of considering the effects of commercial fuels with high ethanol content on engine performance and emissions.
Article
Energy & Fuels
Changzhao Jiang, Chongming Wang, Hongming Xu, Haoye Liu, Xiao Ma
Summary: The study found that employing the stratified lean-burn mode in spark-ignition engines can significantly improve fuel economy, with up to a 16% increase if the second injection timing is optimized. The second injection timing also has significant impacts on IMEP, combustion duration, COV, gaseous emission, and particulate number emissions.
Article
Chemistry, Physical
Paolo Sementa, Jacson Beltrao de Vargas Antolini, Cinzia Tornatore, Francesco Catapano, Bianca Maria Vaglieco, Jose Javier Lopez Sanchez
Summary: This study investigates the performance and emissions of a single-cylinder SI engine operating under lean-burn hydrogen combustion and compares it to methane under similar conditions. The results show that hydrogen combustion achieves stable combustion with lower pollutant emissions and higher efficiency, making it a promising clean fuel to replace conventional fuels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Beichuan Hong, Andreas Lius, Senthil Krishnan Mahendar, Mihai Mihaescu, Andreas Cronhjort
Summary: This study provides a deeper understanding of the high-load performance of an ethanol-fueled heavy-duty SI engine using lean-burn combustion. Experimental results show that the thermal efficiency of ethanol fuel significantly increases under excess air ratios higher than 1.8, while combustion losses increase. The challenging requirements to achieve lean-burn combustion with lower exhaust gas temperatures and higher intake boost pressures are assessed through an exergy analysis of the turbocharging system.
APPLIED THERMAL ENGINEERING
(2023)
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
Chemistry, Physical
Jianbing Gao, Guohong Tian, Chaochen Ma, Yuanjian Zhang, Shikai Xing, Phil Jenner
Summary: Lean-burn was adopted as an effective method in this study to reduce NOx emissions from hydrogen combustion in ORP engines. The equivalence ratio has a significant impact on combustion and NOx emission characteristics, with effects varying with engine speeds. High NOx emissions were observed under low engine speed conditions due to hydrogen combustion near stoichiometric ratio.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Sanguk Lee, Gyeonggon Kim, Choongsik Bae
Summary: The study looked into using hydrogen as a fuel for internal combustion engines to reduce carbon emissions in the transportation sector. It found that the mixture formation time (MFT) and ambient density played a significant role in hydrogen stratified charge combustion (SCC). By optimizing injection and ignition timings, high-efficiency and clean transportation may be achievable.
Article
Chemistry, Analytical
Xiaoyan Wang, Tanqing Zhou, Quan Dong, Zhaolin Cheng, Xiyu Yang
Summary: In this study, an innovative sensor was designed to detect the key combustion parameters of a marine natural gas engine. The sensor utilized ion current and achieved real-time monitoring of the combustion process. The results showed that the ion current had a high correlation with engine load, excess air coefficient, and ignition timing. By using neural network models, the sensor was able to accurately predict the combustion parameters. This study is of great importance for improving the combustion efficiency of marine natural gas engines.
Article
Thermodynamics
Sanguk Lee, Gyeonggon Kim, Choongsik Bae
Summary: Hydrogen direct injection using stratified charge combustion (SCC) was studied to extend the lean limit of spark ignition engines. Varying the injection and ignition timing showed different types of combustion and combustion stability. The optimization of hydrogen SCC based on timing could contribute to a clean and efficient transport sector.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Article
Energy & Fuels
Ibham Veza, Irianto, Anh Tuan Hoang, Abdulfatah A. Yusuf, Safarudin G. Herawan, M. E. M. Soudagar, Olusegun D. Samuel, M. F. M. Said, Arridina S. Silitonga
Summary: The addition of acetone-butanol-ethanol (ABE) as a fuel can decrease CO2 and NOx emissions in an HCCI-DI engine, but has no significant effect on HC, CO, PM, and soot emissions. Furthermore, engine performance is improved with the addition of ABE.
Article
Energy & Fuels
Xinlei Liu, Hammam Aljabri, Mickael Silva, Abdullah S. AlRamadan, Moez Ben Houidi, Emre Cenker, Hong G. Im
Summary: The combustion of hydrogen in engines produces few harmful emissions, with the exception of nitric oxides (NOx), which can be reduced under lean-burn conditions. This study investigated the feasibility of hydrogen pre-chamber combustion in a heavy-duty diesel engine using CFD modeling. The results showed that the pre-chamber combustion effectively controlled heat release and reduced NOx emissions, but also decreased complete combustion and combustion stability. The engine operating range could be extended by introducing fuel into the pre-chamber and adjusting the pre-chamber throat diameter to control the pressure rise rate.
Article
Chemistry, Physical
Gu Xin, Changwei Ji, Shuofeng Wang, Hao Meng, Ke Chang, Jinxin Yang
Summary: This experimental study investigates the suppression of heat release rate in a hydrogen-fueled engine through the addition of ammonia. The results show that adding small amounts of ammonia decreases the combustion rate, prolongs flame development and propagation durations, reduces pressure and heat release rate peaks, and increases peak effective pressure and thermal efficiency. However, it also leads to increased nitrogen oxide emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Cesar Adolfo Rodriguez Sotomonte, Thiago Gotelip Correa Veloso, Christian J. R. Coronado, Marco A. Rosa do Nascimento
Summary: This study aims to optimize the design of a small-scale cogeneration system using ORC and absorption refrigeration cycle, evaluating the best solutions through a multi-objective genetic optimization algorithm. The results show that factors such as specific working fluids, net power output, and overall energy efficiency have significant impacts on the technical and economic performance of the cycle.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
D. H. D. Rocha, T. A. Z. de Souza, C. J. R. Coronado, J. L. Silveira, R. J. Silva
Summary: The study found that by recycling the residual gas with high concentration of water and CO2, the glycerol reforming capacity can be maximized while increasing the system's overall exergy efficiency. This process was evaluated in three different scenarios regarding reform gas processing from technical and environmental perspectives.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
T. A. Z. de Souza, C. J. R. Coronado, J. L. Silveira, G. M. Pinto
Summary: The increase in environmental concern has led to a rise in biodiesel production and subsequently a surplus of glycerol, resulting in plummeting prices. Research evaluating the economic potential of hydrogen production from glycerol in the Brazilian biodiesel industry found the project financially unsuitable due to high costs. Despite the potential to sell hydrogen directly, the use of Solid Oxide Fuel Cells for electricity production was deemed impractical due to high investment costs.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Alisson Aparecido Vitoriano Julio, Eric Alberto Ocampo Batlle, Christian Jeremi Coronado Rodriguez, Jose Carlos Escobar Palacio
Summary: The production of biofuel from biomass is a viable option due to availability and renewability. However, the production chains are not fully prepared, with low production yields and high levels of irreversibility.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Engineering, Civil
Jean A. Barbosa, Christian J. R. Coronado, Celso E. Tuna, Marcos H. Silva, Andres Z. Mendiburu, Joao A. Carvalho Junior, Jose C. de Andrade
Summary: This research focuses on experimentally determining the Lower Flammability Limit (LFL) of Synthesized Iso-Paraffins (SIP) blended with traditional jet fuel, providing important data for the safety assessment of alternative fuels in the aeronautical sector.
FIRE SAFETY JOURNAL
(2021)
Article
Thermodynamics
Rieder de Oliveira Neto, Cesar Adolfo Rodriguez Sotomonte, Christian J. R. Coronado
Summary: The study focused on an ORC system to recover energy from the exhaust gases of a stationary diesel engine, with analysis on system parameters, off-design conditions, and economic feasibility. Results showed increased thermal efficiency, reduced fuel consumption, and pollutant gas emissions in the power plant with the implementation of the system.
APPLIED THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
T. A. Z. de Souza, D. H. D. Rocha, A. A. V. Julio, C. J. R. Coronado, J. L. Silveira, R. J. Silva, J. C. E. Palacio
Summary: The study assessed the performance of steam reforming process in terms of water consumption in the Brazilian scenario, finding that steam methane reforming had the lowest water footprint and bioethanol reforming had the highest. Exergoenvironmental analysis revealed some bottlenecks, but globally, steam reforming of presented feedstock can be an alternative for exploring in the context of water resources preservation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Mechanical
Jean Andrade Barbosa, Jose Carlos de Andrade, Fernando de Souza Costa, Christian Jeremi Rodriguez Coronado, Claudia Goncalves de Azevedo, Ricardo Amaral de Andrade
Summary: Flameless combustion shows significant potential for aeronautical applications due to its homogeneous temperature distribution, relatively low temperatures, high thermal efficiency, reduced NOx emissions, and reduced thermal stress in the chamber. This study demonstrates the possibility of achieving flameless combustion of Jet A-1 fuel through experimental data obtained in a small combustion chamber.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Edwin Santiago Rios Escalante, Luth Silva Ramos, Christian J. Rodriguez Coronado, Joao Andrade de Carvalho Junior
Summary: The Brazilian aviation sector aims to reduce greenhouse gas emissions by up to 37% by 2030 and 43% by 2050 using alternative fuels. Potential feedstocks for biojet fuel production in Brazil were evaluated, showing a significant amount of available land for feedstock cultivation but highlighting challenges in conversion technologies. A self-sustained integrated process focusing on sugarcane as the main feedstock was found to improve biojet fuel production performance and reduce the need for cultivated lands.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(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
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
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
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
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
