Article
Energy & Fuels
Peng Ran, Haiyang Zhang, Yu Qiao, Jing Wang, Zheng Li, Yase Wang
Summary: The SI-ACAES system proposed in this paper aims to enhance the installed capacity and output of ACAES systems by preheating and humidifying the inlet working medium of the turbine. Energy and exergy analyses were conducted to evaluate the performance of the system, showing improvements in turbine power, round trip efficiency, compression heat utilization efficiency, and exergy round trip efficiency compared to traditional ACAES systems. The exergy efficiency increases with throttle valve outlet pressure, but also depends on the inlet water flowrate to the saturator and external inlet air flowrate to heat exchanger 8.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Prathamesh Bodhankar, Shanmukh Patnaik, Ganesh R. Kale
Summary: Autothermal reforming of methane is a widely reported technique for syngas production, the study reveals that specific operational parameters can lead to high conversion efficiency and optimal hydrogen to nitrogen ratio. Thermodynamic analysis identified the best operating parameters for this technology, contributing to efficient hydrogen production.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Yujie Li, Cheng Zhai, Jizhao Xu, Yong Sun, Xu Yu
Summary: This study investigates the feasibility of enhanced coalbed methane (CBM) recovery through steam injection. Results show that steam injection can increase the internal temperature of coal samples and induce thermal cracking, facilitating gas desorption and migration. Furthermore, steam preferentially condenses in coal micropores and has the potential to displace methane. The study suggests that steam injection may not cause water blocking effects. These findings provide valuable insights for the field application of steam injection to enhance CBM production.
Article
Energy & Fuels
Xuan Du, Tong Liu, Changfeng Xi, Bojun Wang, Zongyao Qi, You Zhou, Jiacheng Xu, Lixing Lin, Georgeta Istratescu, Tayfun Babadagli, Huazhou Andy Li
Summary: Steam injection is a reliable and successful heavy oil recovery technique. However, the requirement of a large amount of energy, high operational cost, and environmental concerns hinder its future applications. Hot water injection with chemical additives is a possible alternative. Experimental results show that chemical additives can significantly improve the recovery factor, reduce cost, and lessen environmental impact.
Article
Energy & Fuels
E. A. Araujo, L. C. Batista, J. V. O. Bechara, A. R. Gurgel, G. P. Oliveira, P. T. P. Aum
Summary: Steam injection is a commonly used thermal recovery method in the oil industry due to its heat concentration, availability, and moderate cost. This study evaluated the impact of steam injection on heavy-oil recovery factor in a model composed of HPSs, finding that the recovery factor can increase or decrease depending on the layout, number, and position of the HPSs, with no linear relationship to testing parameters.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Yury Klyukin, Michael Nightingale, Basil Perdicakis, Bernhard Mayer, Benjamin Tutolo
Summary: This study focused on the extraction of hydrocarbons from oil sand deposits and the challenges faced during the process, such as scale formation in Once-Through Steam Generators (OTSGs) and its potential impacts on pipelines. Through the use of geochemical, mineralogical, and modeling techniques, the inorganic components of scale samples were characterized and modeled, providing promising insights for future management of scale formation processes.
Article
Thermodynamics
Hasan Kayhan Kayadelen, Yasin Ust, Veysi Bashan
Summary: Inter-stage turbine reheat is an effective gas turbine retrofit that can significantly improve net cycle work, but may not be suitable for cycles with low pressure ratios if maximum thermal efficiency is the primary concern. Adjusting the reheat pressure can achieve a good compromise between maximum net work and maximum thermal efficiency.
Article
Thermodynamics
Ziyu Gao, Xinjing Zhang, Xiaoyu Li, Yujie Xu, Haisheng Chen
Summary: Compressed air energy storage (CAES) is an effective technology for long-duration energy storage and supporting high penetration of renewable energy. The use of water droplets for isothermal compression and expansion improves efficiency and thermodynamic performance. Increasing the gas-liquid mass ratio and reducing rotation speed have positive effects on isothermal compression/expansion efficiency, round-trip efficiency, and isothermality.
Article
Thermodynamics
Jun Zhang
Summary: This study focuses on the timing and methods of steam stimulation, steam flooding, and subsequent steam flooding in heavy oil reservoirs, and identifies some deficiencies in the current research. Additionally, the research on the mass and heat transfer characteristics of high temperature steam injection in heavy oil reservoirs is still in its early stages. The article establishes a horizontal well pattern model using numerical simulation software to analyze the heat and mass transfer characteristics of high temperature steam huff and puff and high temperature steam flooding, and the results show that the thermal connectivity between the horizontal well patterns is improved after the huff and puff phase.
Article
Engineering, Environmental
Jun Yuan, Xiao Lei, Chenqi Yi, Haoqing Jiang, Feng Liu, Gary J. Cheng
Summary: In this study, 3D hierarchical porous hybrid hydrogel evaporators with embedded carbon black are built through 3D printing method for solar steam generation. The evaporators show high evaporation rate, solar energy conversion efficiency, and great application prospects in seawater desalination and wastewater purification.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Computer Science, Information Systems
Manuel Leithner, Bernhard Garn, Dimitris E. Simos
Summary: Injection vulnerabilities are still a significant threat to web application security due to insufficient validation and filtering of user input. The HYDRA approach introduces a feedback-driven black-box security testing method for exploiting these vulnerabilities, enabling the evasion of imperfect filters and the identification of vulnerabilities effectively.This approach allows users to define and rank desirable output contexts, enhancing flexibility in identifying XSS vulnerabilities and potentially advancing security testing for other classes of vulnerabilities like SQL injections.
INFORMATION AND SOFTWARE TECHNOLOGY
(2021)
Article
Construction & Building Technology
Guofu Qiao, Guangjie Xue, Guangxiang Zhu
Summary: This study investigates the rules and key factors of thermal cracking during the steam-curing process through numerical simulation and field tests. The results show that the curing temperature and parameters of the hydration exothermic model are crucial to the thermal behavior of the box girder.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Tatiana Morozova, Nicolas A. Garcia, Jean-Louis Barrat
Summary: This study investigates the temperature dependence of different water models and finds that four-point water models are more suitable than the traditional TIP3P model for modeling temperature-dependent phenomena in biomolecular systems.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Thermodynamics
Jingyi Wang, Ian D. Gates
Summary: Despite the technical and economic success of SAGD, improving its thermal efficiency by reducing the steam-to-oil ratio (SOR) faces challenges. The study reveals time scales between steam stimulation and bitumen response can be as high as hundreds of days, calling into question the significance of using SOR as a control variable for behaviors away from the well pair.
Article
Thermodynamics
Juergen Krail, Georg Beckmann, Florian Schittl, Gerhard Piringer
Summary: This paper analyses an improved ORC process that injects a liquid working fluid stream into the vapor flow between high-pressure and medium-pressure stages of the turbine, and replaces the recuperator with a spray condenser to increase efficiency with moderate changes in the process layout. Thermodynamic comparison of the improved process with a state-of-the-art ORC process is carried out through simulations and optimizations. The improved process achieves a significant efficiency gain by increasing the mass flow in the economizer of the vapor generator and corresponding mass flow in the medium stage of the turbine.
Article
Engineering, Multidisciplinary
Ward De Paepe, Santiago Pindado, Svend Bram, Francesco Contino
Article
Energy & Fuels
W. De Paepe, F. Contino, F. Delattin, S. Bram, J. De Ruyck
Article
Thermodynamics
Ward De Paepe, Francesco Contino, Frank Delattin, Svend Bram, Jacques De Ruyck
APPLIED THERMAL ENGINEERING
(2014)
Article
Energy & Fuels
Marina Montero Carrero, Irene Rodriguez Sanchez, Ward De Paepe, Alessandro Parente, Francesco Contino
Article
Energy & Fuels
Diederik Coppitters, Ward De Paepe, Francesco Contino
Article
Energy & Fuels
Kevin Verleysen, Diederik Coppitters, Alessandro Parente, Ward De Paepe, Francesco Contino
Article
Engineering, Mechanical
Jarl Beckers, Diederik Coppitters, Ward De Paepe, Francesco Contino, Joeri Van Mierlo, Bjorn Verrelst
Article
Energy & Fuels
Ward De Paepe, Alessio Pappa, Marina Montero Carrero, Laurent Bricteux, Francesco Contino
Article
Thermodynamics
Alessio Pappa, Marie Cordier, Pierre Benard, Laurent Bricteux, Ward De Paepe
Summary: This paper investigates the combustion performance of micro gas turbines under diluted conditions. By utilizing cycle humidification and exhaust gas recirculation, stable and complete combustion is achieved in diluted cases with water and/or CO2.
Article
Energy & Fuels
Diederik Coppitters, Kevin Verleysen, Ward De Paepe, Francesco Contino
Summary: Heavy-duty transport accounts for almost 6% of greenhouse gas emissions in Europe. Renewable hydrogen is a potential solution for decarbonizing heavy-duty transport, such as buses. This study applies robust design optimization to a wind- and solar-powered hydrogen refueling system and a hydrogen- and diesel-powered bus fleet to minimize the Levelized Cost Of Driving (LCOD) and Carbon Intensity (CI) considering technical, economic, and environmental uncertainties, and finds that converting part of the diesel-powered bus fleet to hydrogen-powered buses can significantly reduce variance in LCOD and CI while only slightly increasing the mean LCOD.
Article
Energy & Fuels
Diederik Coppitters, Alexis Costa, Remi Chauvy, Lionel Dubois, Ward De Paepe, Diane Thomas, Guy De Weireld, Francesco Contino
Summary: Direct Air Capture (DAC) technologies are being studied for integration with Power-to-Gas (PtG) systems in order to convert CO2 into methane. The performance of the DAC-PtG system depends on uncertain parameters, and the study analyzes the system using Energy, Exergy, Economic and Environmental (4E) analysis. Introducing a two-stage mechanical vapor recompression unit at the DAC outlet makes the DAC-PtG system autothermal. Uncertainty in exergy efficiency is driven by ambient conditions and the heat of desorption. The carbon footprint and cost of the methane produced by DAC-PtG depends on the electricity supply and expenses related to DAC and electrolysis.
Article
Energy & Fuels
Marina Montero Carrero, Ward De Paepe, Svend Bram, Alessandro Parente, Francesco Contino
Proceedings Paper
Green & Sustainable Science & Technology
Ward De Paepe, Marina Montero Carrero, Svend Bram, Alessandro Parente, Francesco Contino
INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014
(2014)
Proceedings Paper
Green & Sustainable Science & Technology
Marina Montero Carrero, Ward De Paepe, Alessandro Parente, Julien Blondeau, Hannes Laget, Francesco Contino
INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014
(2014)
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.
