Article
Energy & Fuels
Jingjing He, Xin Su, Hao Chen, Yisong Chen, Xinfeng Zhang, Yanfang Liu, Zhilin Tian, Hongming Xu
Summary: This study investigates the spray and combustion characteristics of diesel blends with different PODE blending ratios. The results show that adding PODE can significantly reduce soot emissions. The higher the PODE blending ratio, the less soot formation.
Article
Energy & Fuels
Xiaolei Zhang, Jiangping Tian, Zechuan Cui, Siyuan Xiong, Shuo Yin, Quan Wang, Wuqiang Long
Summary: Ammonia, as a carbon-free green fuel, has gained increasing attention recently. However, its low chemical reactivity poses a challenge for its application as an alternative fuel in internal combustion engines. Therefore, more fundamental research is needed to improve the ignition and combustion of ammonia in internal combustion engines. This study experimentally investigated the effects of pre-chamber jet ignition and different methane additions on the combustion characteristics of ammonia/air mixtures. The results showed that pre-chamber jet ignition improved the combustion performance and stability of the premixed ammonia/air mixture compared to spark direct ignition.
Article
Energy & Fuels
Yanfei Li, Nannan Sun, Xin Zhang, Yue Wang, Jiuling Sun
Summary: Ion current detection technology has a broad application prospect in natural gas engines, and further research is needed to study the effect of background turbulent environment on the premixed combustion of methane-air mixtures.
Article
Chemistry, Applied
Xiaoteng Zhang, Chao Geng, Zhenyang Ming, Haifeng Liu, Yanqing Cui, Chao Jin, Long Liu
Summary: This paper studies the combustion characteristics of pure ethanol spray flame and compares it with methanol and n-butanol. The results show that the ethanol spray flame exhibits an unstable yellow flame, and the flame brightness, soot concentration, and ignition delay increase with the increase of injection mass. Increased injection pressure leads to an increase in the soot lift-off length and a decrease in flame brightness, but has a negligible effect on reducing ignition delay.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Applied
Zinong Zuo, Bo Hu, Xiuchao Bao, Shibo Zhang, Likang Fan, Lang Deng, Yibo Xu, Suozhu Pan, Yi Wu
Summary: The effects of initial pressure on the self-acceleration characteristics of C1-C3 alkane flames were studied in a constant-volume chamber. The results showed that the self-acceleration exponent and fractal dimension of the flames increased with the increase in pressure, reaching the maximum values at 1.5 MPa. Additionally, the evolution of the cellular structure in the flame front during self-acceleration was quantitatively studied.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Thermodynamics
Shaobo Ji, Yang Li, Guohong Tian, Minglei Shu, Guorui Jia, Shaoqing He, Xin Lan, Yong Cheng
Summary: The study found that ozone can promote the combustion reaction activity of methane-air mixture, increase flame instability, decrease flame thickness, and enhance flame speed and burning velocity. Ozone has a more notable enhancement effect for lean methane-air mixture, which can theoretically improve the combustion performance of natural gas engines.
Article
Energy & Fuels
Jun Sheng Teh, Yew Heng Teoh, Heoy Geok How, Mohamad Yusof Idroas, Thanh Danh Le, Huu Tho Nguyen
Summary: The study investigated the combustion characteristics of biomass producer gas (BPG), with coconut husk (CH) exhibiting the lowest chamber peak pressure and emissions of CO2 and CO among the three types of BPG tested.
Article
Thermodynamics
Mohammadrasool Morovatiyan, Martia Shahsavan, Jonathan Aguilar, Mammadbaghir Baghirzade, J. Hunter Mack
Summary: Combustion of natural gas with hydrogen and argon as working fluid shows promising results in increasing efficiency and reducing emissions in internal combustion engines. The addition of hydrogen contributes to emission reduction and broadens the flammability limits.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Evans K. Quaye, Pan Jianfeng, Lu Qingbo, Yi Zhang, Wang Yu, Anthony Akurugo Alubokin
Summary: The study conducted a three-dimensional numerical and experimental investigation on methane-oxygen combustion in a small scale porous-media cylindrical combustor. The results indicate that porous media improves the thermal characteristics of the combustor, leading to more stable wall temperatures under certain conditions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Energy & Fuels
Cho-Yu Lee, Xinwei Cheng, Hiew Mun Poon, Sivanjaneya Reddy Yelugoti, Wei-Cheng Wang
Summary: This study investigated the ignition characteristics and emissions of ethanol blended with hydro-processed renewable diesel (HRD) through experiments and simulations. The results showed that increasing the ethanol concentration delayed ignition, reduced CO2 emissions but increased NOx emissions. The addition of ethanol lowered the combustion temperature, resulting in lower NOx formation, and increased oxygen concentration, aiding in the oxidation of CO to form CO2 and reducing CO emissions. The addition of ethanol also helped reduce hydrocarbon emissions. A kinetic model was developed and reasonably reproduced the experimental results, capturing the trend of elongated ignition delay with increasing ethanol concentration.
Article
Thermodynamics
Bin Wang, Fangxi Xie, Wei Hong, Jiakun Du, Hong Chen, Yan Su
Summary: Pre-chamber turbulent jet ignition technology is effective in optimizing the combustion process of methanol-air mixture. Different pre-chamber ignition modes can significantly increase the peak heat release rate, with jet flame ignition mode having the highest impact on the lean-burn limit. The total cross-sectional area of the nozzles in the pre-chamber has the most significant influence on performance.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Yanfei Li, Xin Zhang, Yue Wang, Jiuling Sun
Summary: In this study, the combustion characteristics of turbulent stratified combustion under different background equivalent ratio conditions were experimentally investigated. The results show that concentration stratification of the mixture can accelerate flame propagation speed, and an appropriate degree of stratification is beneficial for improving flame stability.
Article
Thermodynamics
Hang Su, Jiepeng Huo, Xiaohan Wang, Liqiao Jiang, Qianshi Song, Daiqing Zhao
Summary: The flame propagation speed decreases as the combustion chamber height decreases, but increases with increasing initial pressure. Under suitable initial pressure, periodic stagnation of flame propagation may be observed. The initial pressure affects only the amplitude, not the frequency, of the oscillation in unstable flame propagation.
COMBUSTION SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Pengjin Cao, Peng Cheng, Xiao Bai, Qinglian Li, Chengchao Cui
Summary: Visual combustion experiments were conducted to investigate the effects of recess ratio on the flame spatial structure and combustion efficiency of LOX/methane swirl coaxial injectors. Results showed a strong correlation between flame length and combustion efficiency, with stable flames having higher efficiency than oscillating flames. A specific recess ratio between 0.33 and 0.54 was found to result in the maximum combustion efficiency and transition of the flame. The lowest combustion efficiency was observed at the critical recess ratio of 0.73. The oscillation of spray and flame was gradually suppressed with larger recess ratios.
Review
Energy & Fuels
Pengfei Li, Pengfei Cheng, Guochang Wang, Feifei Wang, Kin-Pang Cheong, Zhaohui Liu, Jianchun Mi
Summary: Moderateor intense low-oxygen dilution (MILD) combustion has the advantages of high thermal efficiency and ultralow NOx emissions. This technology has attracted extensive attention since 1990. Initially, the development of MILD combustion technologies required preheating the combustion air externally, limiting its industrial applications for burning solid fuels. However, this limitation has been overcome, and significant progress has been made in solid-fuel MILD combustion, including the development of burners utilizing different types of solid fuels and the reduction of pollutant emissions.
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)