Article
Thermodynamics
I. Ibrahim Enagi, K. A. Al-attab, Z. A. Zainal, Yew Heng Teoh
Summary: Micro gas turbine (MGT) is a promising option for green distributed cogeneration, and it can utilize a wider range of renewable fuel sources. A new chamber geometry was designed and tested for liquid biofuels combustion. The system achieved an overall efficiency of 24.7% and demonstrated low NOx emissions with palm biodiesel in the lab-scale combined heat and power (CHP) configuration.
Article
Green & Sustainable Science & Technology
Mohsen Broumand, Muhammad Shahzeb Khan, Sean Yun, Zekai Hong, Murray J. Thomson
Summary: This study examines the feasibility of using FPBO made from non-food woody biomass in a micro-gas turbine, showing challenges in achieving stable flame with 100% FPBO due to fuel polymerization, which can be addressed by adding EtOH to improve volatility. The internally-mixed nozzle demonstrated cleaner emissions and required less EtOH addition for stabilization compared to the externally-mixed one. Injector modification or fuel upgrading is necessary prior to the deployment of FPBO in replacing fossil oils.
Article
Thermodynamics
Elyas Rostami, Hossein Mahdavy Moghaddam
Summary: This study compared the atomization of heavy fuel oil (Mazut) and diesel fuel at different pressures, and investigated the effects of temperature on Mazut fuel atomization. The results showed that as pressure and temperature increase, fuel atomization performance improves, and there are differences in atomization parameters between Mazut and diesel fuel.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2021)
Review
Thermodynamics
Quangkhai Pham, Sungwook Park, Avinash Kumar Agarwal, Suhan Park
Summary: The performance, combustion, and emission characteristics of alternative fuels in dual-fuel mode in compression ignition engines have been thoroughly analyzed. Generally, alternative fuels improve brake specific energy consumption compared to baseline diesel mode but have lower brake thermal efficiency and volumetric efficiency.
Article
Energy & Fuels
T. Sathish, K. Muthukumar, AbdulKareem Abdulwahab, M. Rajasimman, R. Saravanan, K. Balasankar
Summary: This study aims to develop a low-cost alternative fuel from waste cooking oil and enhance its fuel properties using nanoparticles. Experimental comparisons showed that one of the nanoparticle fuels had higher brake thermal efficiency and lower emissions. Therefore, this research suggests it as a cheap and best alternative fuel for diesel engines.
Article
Energy & Fuels
Zhijie Zhu, Xingyu Liang, Lei Cui, Kun Wang, Xiaohui Wang, Shihao Zhu
Summary: Currently, most ships still rely on fossil fuels as the main source for marine engines. However, diesel as a fuel for marine engines is no longer sufficient to meet the economic requirements of shipping and emission restrictions imposed by regulations. This research examined the viability of employing hydrogen-carrying fuel ammonia (NH3) in marine engines to develop a low-carbon combustion technology, to address the carbon emission problem of marine diesel engines.
Article
Thermodynamics
Vladimir Markov, Bowen Sa, Sergey Devyanin, Leonid Grekhov, Vsevolod Neverov, Jianhui Zhao
Summary: Vegetable oil-based biofuels, such as DF and RO, show promise as carbon-neutral alternatives to fossil fuels. This study focuses on comparing the injection and spray characteristics of DF and RO, as well as their relationship with emission formation. The results suggest that RO has lower injection velocity and TKE compared to DF. Increasing the RO content leads to changes in spray angle, spray tip penetration, SMD, and the mass fraction of fuel injected onto the combustion chamber walls. Additionally, a correlation is found between NOx emissions and SMD.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Tushar Ahmed, Agisilaos Kourmatzis, Gajendra Singh, Assaad R. Masri
Summary: This paper presents an experimental study on the turbulent spray flames of atomized kerosene using a new hybrid air-blast/electrohydrodynamic atomizer. The study focuses on the influence of electric charge on the stability, flow field, and reaction zone structure of the spray flames. Experimental results show a notable increase in particle concentration with the application of charge, while the velocity fields remain largely unchanged. Laser-induced fluorescence experiments also indicate a clear influence of charge on the reaction zone structures.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Liam Krebbers, Sajjad Mohammadnejad, Ali Rostami, Sina Kheirkhah
Summary: This experimental study investigates the spatial and temporal relations between flame chemiluminescence and the number of droplets in spray flames. The coupling between these parameters is driven by the spray dynamics and methane combustion, and the role of droplet number density in elucidating the coupling is emphasized. A linear regression model based on time lag is developed to investigate the temporal relations between flame chemiluminescence and the number of droplets in Jet A-1 spray flames.
COMBUSTION AND FLAME
(2023)
Article
Thermodynamics
Jixiu Jia, Lixin Zhao, Zhidan Liu, Xiaowen Hao, Lili Huo, Yanan Zhao, Zonglu Yao
Summary: This study investigated the influence of methanol addition, temperature, and atomization pressure on the spray atomization of pyrolysis tar using an experimental platform. The results showed that methanol addition was more effective than heating at temperatures below 40°C in improving the fluidity of pyrolysis tar. The addition of methanol had little effect on the spray angle, which was mainly influenced by the atomization pressure.
Article
Energy & Fuels
Ping Yi, Tie Li, Yijie Wei, Xinyi Zhou
Summary: The spray characteristics of low sulfur heavy fuel oil (HFO) were studied through experiments and numerical methods, revealing minimal impact from sulfurization on spray characteristics. Evaporation and pyrolysis penetration lengths were proposed as criteria for determining dominance of volatile and non-volatile components.
Article
Engineering, Chemical
S. M. A. Najafi, P. Mikaniki, H. Ghassemi
Summary: The introduction of a new injector type PPS, combining pressure-swirl and ultrasonic pulsed injectors, results in finer droplets and decreased breakup length. Experimental and numerical results indicate that increasing pulse frequency can further enhance atomization performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Shahin Shahnazari, Mohammad Ali Astaraki, Mohammad Amin Sobati, Hojat Ghassemi
Summary: In this study, water-in-heavy fuel oil (HFO) emulsion fuels with different water content (5%, 10%, 15%) were prepared using ultrasound irradiation without surfactant. The stability of the emulsion fuels was investigated and it was found that the emulsion fuel with 5% water content had the best stability. The atomization behavior and spray characteristics of the emulsion fuels were then examined in a pressure-swirl injector, and it was observed that the micro explosion phenomena caused by the evaporation of water droplets had the most significant impact on the spray characteristics. The emulsion fuel with 5% water content showed the best atomization performance compared to the other fuel samples.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Physics, Multidisciplinary
Zhong-Kun Yang, Gao-Jun An, Xi-Meng Xu, Zhe Zheng, Yong-Xu Wang, Li-Feng Xie, Dan Zhang, Bin Li
Summary: The effects of mass concentration and injection pressure on the atomization characteristics of low-viscosity fuel spray were studied. The results showed that the increase of mass concentration inhibited the atomization effect linearly, while the increase of injection pressure promoted droplet breakup. However, this trend gradually weakened at high concentrations. Compared to concentration, the influence of injection pressure was dominant.
Review
Thermodynamics
Maciej Mikulski, Marta Ambrosewicz-Walacik, Jacek Hunicz, Szymon Nitkiewicz
Summary: Research on combustion engine applications for tyre pyrolysis oil (TPO) is abundant worldwide, but the role of TPO as a fuel for transport applications remains uncertain due to conflicting or ambiguous results. A critical review of over 200 influential research papers suggests that TPO may have potential as a fuel component in marine, off-road, and heavy-duty road applications.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2021)
Article
Engineering, Chemical
Amir Houshang Mahmoudi, A. K. Pozarlik, E. van der Weide, S. R. A. Kersten, S. Luding, G. Brem
CHEMICAL ENGINEERING SCIENCE
(2018)
Article
Thermodynamics
J. A. Baak, A. K. Pozarlik, M. J. Arentsen, G. Brem
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Energy & Fuels
Halina Pawlak-Kruczek, Agnieszka Urbanowska, Weihong Yang, Gerrit Brem, Aneta Magdziarz, Przemyslaw Seruga, Lukasz Niedzwiecki, Artur Pozarlik, Agata Mlonka-Medrala, Malgorzata Kabsch-Korbutowicz, Eduard A. Bramer, Marcin Baranowski, Malgorzata Sieradzka, Monika Tkaczuk-Serafin
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2020)
Article
Engineering, Electrical & Electronic
Antoni Brentjes, Artur K. Pozarlik, Gerrit Brem
JOURNAL OF ELECTROSTATICS
(2020)
Article
Energy & Fuels
Umair Jamil Ur Rahman, Artur Krzysztof Pozarlik, Thomas Tourneur, Axel de Broqueville, Juray De Wilde, Gerrit Brem
Summary: In this study, an intensified spray-drying process in a novel Radial Multizone Dryer (RMD) was analyzed using CFD. The effect of solids outlet location, relative hot/cold airflow ratio, and droplet size on heat and mass transfer characteristics, G-acceleration, residence time, and separation efficiency of the product was investigated. The results showed that the temperature pattern in the dryer is dependent on the solids outlet location, and the highest product separation efficiency was obtained with high G-acceleration and narrow droplet size distribution.
Article
Energy & Fuels
Umair Jamil Ur Rahman, Artur K. Pozarlik
Summary: This research utilized numerical simulations to investigate the skim milk spray drying process, with results showing good agreement between model predictions and experimental data, providing insights for optimizing the drying process.
Article
Energy & Fuels
Agnieszka Urbanowska, Malgorzata Kabsch-Korbutowicz, Christian Aragon-Briceno, Mateusz Wnukowski, Artur Pozarlik, Lukasz Niedzwiecki, Marcin Baranowski, Michal Czerep, Przemyslaw Seruga, Halina Pawlak-Kruczek, Eduard Bramer, Gerrit Brem
Summary: The new regulations restrict traditional ways of utilizing the by-product of anaerobic digestion, prompting the exploration of innovative methods such as hydrothermal carbonisation (HTC) for more efficient valorisation. By recirculating process water back to the HTC process, nutrient recovery efficiency can be enhanced. The use of cascade membrane systems has been found to be effective in separating organic by-products of HTC and water, achieving a COD removal efficiency of nearly 60%.
Article
Engineering, Electrical & Electronic
Antoni Brentjes, Artur K. Pozarlik, Gerrit Brem
Summary: This novel method estimates droplet charge in numerical simulations of conductively and inductively charged sprays by balancing effective electric field at the sprayer nozzle with global electric field induced by charged droplets. The global approach avoids computationally expensive local resolution, enabling its use in Eulerian-Lagrangian simulations of high-flowrate sprays. Validation against experimental data confirms accurate prediction of droplet charge over a wide range of parameters for conductive spray liquids.
JOURNAL OF ELECTROSTATICS
(2021)
Review
Green & Sustainable Science & Technology
C. I. Aragon-Briceno, A. K. Pozarlik, E. A. Bramer, Lukasz Niedzwiecki, H. Pawlak-Kruczek, G. Brem
Summary: The biorefinery concept aims to utilize all properties of biomass to produce energy and recover useful chemical products. Hydrothermal carbonization (HTC) is a suitable option for energy recovery and enhanced nutrient recovery, with part of the nutrients solubilized into process water and the rest remaining in hydrochar.
Article
Green & Sustainable Science & Technology
Aneta Magdziarz, Agata Mlonka-Medrala, Malgorzata Sieradzka, Christian Aragon-Briceno, Artur Pozarlik, Eddy A. Bramer, Gerrit Brem, Lukasz Niedzwiecki, Halina Pawlak-Kruczek
Summary: Digestate is a nutrient-rich substance produced by anaerobic digestion, which can be utilized as a solid biofuel, soil amendment substance, or substrate for activated carbon production. Hydrothermal carbonisation (HTC) is investigated as a pre-treatment method for digestate, resulting in changes in physical and chemical properties of the hydrochars.
Article
Engineering, Chemical
Umair Jamil Ur Rahman, Artur K. Pozarlik, Gerrit Brem
Summary: This research experimentally analyzes a counter flow spray drying process using water and skim milk as a feed. The droplet size distribution of sprays and the temperature profiles in the dryer were examined. The study evaluated the influence of air inlet temperature, air mass flow rate, feed flow rate, and droplet size on air temperatures in the dryer. The results obtained show that efficient contact between hot air and spray in a small volume can be achieved using a counter-current mechanism.
Editorial Material
Energy & Fuels
Tadeas Ochodek, Emmanouil Karampinis, Artur Pozarlik
Article
Engineering, Electrical & Electronic
Antoni Brentjes, Bart Jansen, Artur K. Pozarlik
Summary: The spray characteristics of an air-assisted electrostatic atomizer were experimentally investigated using a shadowgraphy particle/droplet image analysis technique. The results showed that the droplet sizes followed the Rosin-Rammler distribution and the electrode voltage had no measurable impact on the droplet size and velocity. The energy efficiency of the sprayer was found to decrease with increases in both liquid and airflow.
JOURNAL OF ELECTROSTATICS
(2022)
Article
Green & Sustainable Science & Technology
Christian Aragon-Briceno, Artur Pozarlik, Eddy Bramer, Gerrit Brem, Shule Wang, Yuming Wen, Weihong Yang, Halina Pawlak-Kruczek, Lukasz Niedzwiecki, Agnieszka Urbanowska, Krzysztof Moscicki, Michal Ploszczyca
Summary: Anaerobic digestion is an efficient method for utilizing wet municipal solid waste (MSW) to produce biogas. This study focused on the determination of optimum hydrothermal carbonization (HTC) process conditions to recover water from MSW digestate. Results showed that HTC treatment increased water recovery during the dewatering process compared with the original feedstock. A process model was built, demonstrating a positive energy balance and electrical efficiency.
Article
Chemistry, Multidisciplinary
Lukasz Niedzwiecki, Krzysztof Moscicki, Anton Bijl, Pawel Owczarek, Amit Arora, Mateusz Wnukowski, Christian Aragon-Briceno, Halina Vishwajeet, Halina Pawlak-Kruczek, Eddy Bramer, Gerrit Brem, Artur Pozarlik
Summary: This study investigates the influence of hydrothermal carbonization (HTC) on the kinetics of fast pyrolysis of agricultural biomass (miscanthus), as well as the effects of in situ use of a CaO catalyst. The results show that HTC can improve the quality of pyrolysis oil by reducing the oxygen content in biomass. Moreover, the addition of CaO catalyst during HTC process further enhances the pyrolysis reaction.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
