Article
Engineering, Chemical
Hongpeng Liu, Haiwen Sun, Ye Bi, Chunxia Jia, Lei Zhang, Yanlong Li, Hong Qin, Qing Wang
Summary: The numerical simulation of a 440 t/h circulating fluidized bed boiler was conducted using the Computational Particle Fluid Dynamics (CPFD) method. The study investigated the combustion characteristics of the circulating fluidized bed boiler and the effect of secondary air on NO emissions. A full-scale three-dimensional model of the boiler was established and validated with experimental data. The simulation predicted the combustion conditions under different settings and the impact of varying secondary air rates on NO formation. The results showed the positive effect of an optimal secondary air rate in inhibiting NO generation and the importance of balancing air classification and central air supply to maintain stable operation.
Article
Engineering, Chemical
Changwon Yang, Jaeyong Jeong, Youngdoo Kim, Byeongryeol Bang, Uendo Lee
Summary: The hydrodynamics of a circulating fluidized bed combustor were studied through experiments and simulations, evaluating the performance of two empirical models. The exponential functions model showed better accuracy in predicting the decay of solids volume fraction and core-annulus flow structure.
Article
Engineering, Chemical
Ying Cui, Ye Zou, Shujun Jiang, Wenqi Zhong
Summary: Supercritical CO2 (S-CO2) circulating fluidized bed (CFB) boiler has broad prospects in coal-fired power generation due to its high combustion efficiency, compact structure, and low pollution emission. Scale-up regularity research based on combustion characteristics of S-CO2 CFB boiler is crucial for its industrial applications. Accurately predicting the scale-up according to the operating performance of the S-CO2 CFB boiler is of great significance in order to simplify the workload and save time cost.
Article
Energy & Fuels
Joseba Moreno, Sally L. Homsy, Max Schmid, Gunter Scheffknecht
Summary: This study investigated the multicyclic behavior of limestone in a 20 kWth CaL facility and analyzed the performance of the carbonator under various process variables. The carbonator design achieved high CO2 capture efficiencies and apparent carbonation rates within the investigated operating conditions. The proposed design could potentially be integrated into existing load-following power plants for more flexible usage of CaL systems.
Article
Engineering, Chemical
Salma Benzarti, Hatem Mhiri, Herve Bournot
Summary: In this study, the effect of ring baffle configuration on fluidization system hydrodynamics was investigated using a multifluid Eulerian CFD model and the Kinetic Theory of Granular Flow. It was found that the incorporation of ring baffles improved system mixing and reduced wall backflow, with limited impact of baffle shape on system hydrodynamics.
Article
Energy & Fuels
Peng Liu, Xuan Wu, Zhengyang Wang, Yuxuan Bo, Haoran Bao
Summary: Circulating fluidized bed flue gas desulfurization technology is widely used, and this study applies computational particle fluid dynamics (CPFD) numerical simulation method to investigate the gas-solid two-phase flow and desulfurization characteristics in the circulating fluidized bed desulfurization tower, revealing insights for improving desulfurization efficiency.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Energy & Fuels
Mustafa Metin Cam, Hakan Serhad Soyhan, Mansour Al Qubeissi, Cenk Celik
Summary: The design of energy efficient engineering systems is crucial for sustainable operation. This study focuses on optimizing the bell-type primary air nozzle used in CFB boilers through CFD simulations. By changing the nozzle geometry, pressure drop can be decreased and flow uniformity can be improved, resulting in energy savings and improved boiler operation.
Article
Construction & Building Technology
Abel Shiferaw Alemu, Bang Yeon Lee, Solmoi Park, Hyeong-Ki Kim
Summary: The study evaluated the potential of CFBC bottom ash with high sulfate, free lime, and portlandite contents for improving the self-healing capacity of Portland cement and slag cement binder systems. Results showed that adding CFBC bottom ash can activate slag and form dense ettringite networks on crack surfaces for healing, provided that atmospheric carbonation is prevented.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Pavel Skopec, Jan Hrdlicka, Matej Vodicka
Summary: The research results show that significantly higher SO2 capture efficiency can be achieved in oxyfuel conditions compared to air conditions. There are fundamental differences in SO2 capture between air and oxyfuel conditions in real combustion environments. The performance of the sorbent is important mainly at lower Ca/S molar ratios, and the difference in SO2 capture between sorbents decreases with increasing Ca/S ratio.
Article
Chemistry, Physical
Woong-Geol Lee, Myong-Shin Song, Seung-Min Kang
Summary: The by-products of CFBC combustion of coal exhibit self-hardening properties due to the reaction between SiO2 and CaO, and the reaction of gypsum and quicklime with activated alumina. The hydration product calcium aluminate (and/or ferrite) of calcium aluminate ferrite and sulfate was confirmed. The CFBC by-products attain hardening properties because of the carbonation reaction between calcium aluminate ferrite and CO2.
Article
Energy & Fuels
Izabella Maj, Sylwester Kalisz, Robert Wejkowski, Marek Pronobis, Klaudiusz Golombek
Summary: This study investigated corrosion products collected from waterwalls of a circulating fluidized bed boiler. Two types of corrosion spots were identified with high chlorine, potassium, and sodium contents. Laboratory corrosion tests determined the corrosion characteristics and the influence of fuel additives. Halloysite was found to be the most effective additive, and the porosity and adhesion of the oxide layer played a key role in the corrosion process.
Article
Energy & Fuels
Guoliang Song, Yuan Xiao, Zhao Yang, Xueting Yang, Qinggang Lyu, Xingshun Zhang, Qingbo Pan
Summary: The study focused on investigating the operating and emission characteristics during mono-combustion of coal slime in a 75 t/h circulating fluidized bed boiler. The temperature distribution in the furnace was influenced by the fuel characteristics of coal slime and feeding location.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Thermodynamics
Hongfu Zhang, Mingming Gao, Haohao Fan, Kaiping Zhang, Jiahui Zhang
Summary: This study established a dynamic model for SCFB power generation units to explore flexible operation modes, by introducing reasonable assumptions and simplifications, identifying unknown parameters through regression analysis and quantum genetic algorithm, and validating the model accuracy with open-loop step responses and closed-loop experiments. The model accurately tracks the dynamic trends of running data in different load conditions and captures the special dynamic characteristics of SCFB units, making it feasible for advanced control algorithms test and flexible operation control system design.
Article
Energy & Fuels
Shengwei Xin, Hu Wang, Jianbo Li, Gang Wang, Quanhai Wang, Peiqing Cao, Peng Zhang, Xiaofeng Lu
Summary: This study systematically summarizes the deep peak regulation operation of existing CFB units and analyzes the feasibility and peak regulation capacity of an under-development USC-CFB unit. The research results show that by implementing various technical measures, the USC-CFB boiler achieves good operation characteristics and deep peak regulation performance.
Article
Engineering, Chemical
Jakkrapong Phupanit, Chaiwat Soanuch, Krittin Korkerd, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Engineering, Chemical
Ratchanon Piemjaiswang, Shuichi Shiratori, Tawatchai Chaiwatanarat, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2019)
Article
Green & Sustainable Science & Technology
Napapat Chaisubanan, Narong Chanlek, Yingyot Puarporn, Wanwisa Limphirat, Pornpote Piumsomboon, Kejvalee Pruksathorn, Mali Hunsom
Article
Engineering, Chemical
Tarabordin Yurata, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2020)
Article
Engineering, Chemical
Ratchanon Piemjaiswang, Jaruwan Charoenchaipet, Thapanee Saelau, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Summary: This study proposes the use of a micro fluidized bed reactor to overcome operational problems in conventional multiphase flow reactors, with computational fluid dynamics (CFD) simulation verifying its feasibility. Results show that a micro fluidized bed reactor with specific design parameters can achieve the best uniform distribution of gas-solid particles, improving heat and mass transfer rates as well as chemical reaction rates.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Amolwan Sornvichai, Ratchanon Piemjaiswang, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Article
Computer Science, Interdisciplinary Applications
Ratchanon Piemjaiswang, Yan Ding, Yuqing Feng, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Summary: This study investigates the impact of varying parameters on the transport of LDL in atherosclerosis growth, and finds that blood viscosity and bulk flow LDL concentration are crucial factors for lesion growth. The coverage of LDL on arterial wall surface is strongly influenced by blood viscosity, providing insights for further research in this area.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Article
Chemistry, Multidisciplinary
Chaiwat Soanuch, Krittin Korkerd, Jakkrapong Phupanit, Ratchanon Piemjaiswang, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Summary: The study simulated conventional and stage fluidized bed reactors for methanol to olefins (MTO) conversion using computational fluid dynamics and validated the reaction rates. The parameters of the reactor stages were examined, showing that the circulating fluidized bed riser can affect olefin yield.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Cindy Dianita, Ratchanon Piemjaiswang, Benjapon Chalermsinsuwan
Summary: The study used computational fluid dynamic (CFD) approach to simulate high viscous oil-water core annular flow through T and Y-shaped junction pipe configurations, finding that stability of core annular flow was not achieved at the downstream region and the flow transformed into stratified and slug flow. The most attractive design was measured by the small average of pressure gradient and standard deviation of pressure but with a high value of oil holdup.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Energy & Fuels
Dulyapat Thiemsakul, Chaiyanan Kamsuwan, Ratchanon Piemjaiswang, Pornpote Piumsomboon, Benjapon Chalermsinsuwan
Summary: The Internally circulating fluidized bed reactor (ICFB) combines the conventional circulating fluidized bed (CFB) reactor system into a single compact column, utilizing different fluidizing velocities to circulate solid particles for methane dry reforming. Studies showed that reactor design significantly impacts methane conversion in the ICFB, offering potential cost reduction and simplification of operation compared to conventional CFB reactors.
Article
Energy & Fuels
Sahatsawat Seawram, Prathana Nimmanterdwong, Teerawat Sema, Ratchanon Piemjaiswang, Benjapon Chalermsinsuwan
Summary: Currently, many industries aim to improve the heat transfer system to reduce cost and carbon emission. This study developed a prediction model using artificial neural networks to predict the specific heat capacity of hybrid nanofluids, and applied the predicted values to evaluate and analyze heat transfer rates. The results showed that the hybrid nanofluid with Al2O3 and CuO in water exhibited the best heat removing medium in heat exchanger application.
Article
Environmental Sciences
Thomas Mani, Yotwadee Hawangchu, Pummarin Khamdahsag, Jenyuk Lohwacharin, Doungkamon Phihusut, Isara Arsiranant, Chalatip Junchompoo, Ratchanon Piemjaiswang
Summary: Little is known about the detailed pathways and interruptions that occur during the journey of large plastic debris (>5 cm) from land to sea in river pollution research. Understanding fine-scale macroplastic debris transport in tidal rivers and estuaries is still in its early stages. This study demonstrates the capacity to investigate the interactions between macroplastic debris and estuaries using small floating satellite drifters. The study also shows that river macroplastic debris transport 'hotlines' and retention-remobilisation cycles can be studied at a fine scale.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Multidisciplinary
Pilaiwan Chaiwang, Benjapon Chalermsinsuwan, Pornpote Piumsomboon
ENGINEERING JOURNAL-THAILAND
(2019)
Article
Engineering, Environmental
Sutthichai Boonprasop, Benjapon Chalermsinsuwan, Pornpote Piumsomboon
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
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.