Article
Construction & Building Technology
E. R. Teixeira, A. Camoes, F. G. Branco
Summary: Sustainable construction is important, especially in terms of building materials. Using biomass fly ash as a cement replacement material in high-volume fly ash concrete can improve its properties and contribute positively to its quality, durability, and sustainability.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jan Fort, Jiri Sal, Radek Sevcik, Magdalena Dolezelova, Martin Keppert, Milos Jerman, Martina Zaleska, Vojtech Stehel, Robert Cerny
Summary: The tightening of environmental standards in the EU presents a significant push towards the transition to a circular economy. However, the use of coal fly ash as partial cement replacement may face challenges in the future, leading to the consideration of biomass fly ash as a promising alternative.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Saif Al-Shmaisani, Ryan D. Kalina, Raissa Douglas Ferron, Maria C. G. Juenger
Summary: The availability of traditional siliceous Class F fly ash is decreasing as countries switch to renewable energy sources. To extend the availability of siliceous fly ash, suppliers are distributing blended coal ashes and incorporating other coal combustion products (CCPs) or natural pozzolans. While the characteristics of these blended fly ashes may differ, they perform well in cement-based mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Agricultural Engineering
Chong He, Yujia Du, Xingrui Cai, Jirui Wang, Yuhong Qin, Zibing Zhao, Huaizhu Li, Stanislav V. Vassilev, Christina G. Vassileva
Summary: The high contents of certain ash-forming elements in biomass ash can cause ash-related problems during co-gasification of coal and biomass, affecting gasifier operation. In this study, the sintering behavior of different ash mixtures was investigated and the sintering mechanism was revealed through phase studies. The results showed that the sintering temperature reached its minimum at a specific blending ratio of Jatropha seed cake ash in the coal-biomass ash mixture. The presence of specific crystalline phases and the transition of phosphorus from fluxing effect to refractory effect played important roles in the sintering process. These findings can be used for predicting the ash sintering temperature in coal-biomass gasifiers.
BIOMASS & BIOENERGY
(2023)
Article
Thermodynamics
Agnieszka Kijo-Kleczkowska, Magdalena Szumera, Adam Gnatowski, Dominik Sadkowski
Summary: This paper presents a comparative analysis of different fuels and waste materials using thermal analysis techniques. The aim is to explore the potential use of these materials in polymer composites, thermal co-utilization, and energy recovery. The results show that changes in DSC, TG, and DTG values are mainly influenced by the composition of the materials. Quartz sand with organic substance and fly ash exhibit the lowest exothermic effects, while coal has the highest carbon content and calorific value.
Article
Green & Sustainable Science & Technology
Xuexue Wang, Kongyun Zhu, Lei Zhang, Aimin Li, Fahim Ullah, Chuanshuai Chen, Jiaxing Huang, Yulin Zhang
Summary: A new method was proposed to produce glass-ceramics from fly ash and coal fly ash with enhanced properties. Results showed that the addition of coal fly ash improved heavy metal stabilization and compressive strength increased with pretreatment pressure.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Ceramics
Yupeng Xie, Ailian Zhu, Min Chen, Keyou Shi, Qiucai Zhang, Guowen Peng, Yong Liu
Summary: Considerable amounts of coal fly ash (CFA) are produced annually without proper utilization. Alkali-activated CFA was introduced to prepare ceramics to treat neodymium-contaminated soil, and its effect on the properties of the ceramics was investigated. The alkali activation of CFA led to a desilication reaction and the generation of new phases rich in sodium, enhancing the mechanical properties of the ceramics. The alkali-activated CFA exhibited higher bulk density and homogeneous distribution of Nd ions in the matrix compared to untreated CFA.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Guoliang Wang, Jesper Naimi Funch Poulsen, Samira Naimi Funch Poulsen, Peter Arendt Jensen, Flemming Jappe Frandsen
Summary: The Danish wheat straw, rich in K and Cl, is the most problematic fuel in terms of deposit formation, while milled wood pellets, leaves, and bark have lower deposition propensities. The addition of K-capture additives significantly reduces the deposition propensity of wheat straw combustion, but has little effect on wood pellet combustion.
Article
Materials Science, Multidisciplinary
Li Zeng, Hongjuan Sun, Tongjiang Peng, Tao Hui
Summary: Coal fly ash and waste glass were used to prepare CaO-Al2O3-SiO2 system glass-ceramics by direct sintering, and increasing glass content can decrease activation energy, increase flexural strength and bulk density, suitable for high-strength building applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Jinhao Zheng, Lei Liao, Rui Liu, Chongcong Li, Yan Zhang
Summary: This study explored a promising approach to co-manage torrefaction condensates (TCs) and carbon-rich fly ash (FA), finding that the blending of FA and TC improved CO2 gasification reactivity and combustion performance of the resulting mixtures.
Article
Environmental Sciences
Nimeti Doner, Huseyin Topal, Agah Aygahoglu, Fatih Sen, Hassan Karimi-Maleh
Summary: This study investigates the morphological and radiative properties of fly ash samples from different thermal power plants in Turkey. The results show significant differences in absorbance values and wavelength range among different fly ash samples. It is also found that the particle size and absorption index of fly ash have important effects on heat transfer properties.
Article
Chemistry, Physical
Ewelina Grabias-Blicharz, Rafal Panek, Malgorzata Franus, Wojciech Franus
Summary: Mechanically treated fly ash was used to provide Al and Si atoms for zeolite synthesis. The combination of mechanical activation and hydrothermal synthesis improved the dissolution of activated fly ash and the crystallization of zeolites. The obtained zeolite materials exhibited high crystallinity and a large specific surface area. This study provides important data for utilizing fly ash resources and synthesizing practical zeolites.
Article
Construction & Building Technology
Zhiming Shi, Chao Han, Wenbin Wang
Summary: Low-cost desert sand and coal fly ash were used to synthesize high-quality quartz-anorthite composite ceramics. The addition of fly ash affected the densification, phase transformation, microstructure, and mechanical and thermal properties of the ceramics. The results showed that anorthite was formed by the solid-state reaction of quartz, mullite, and other phases in the desert sand and fly ash, promoted by liquid-phase sintering at higher temperatures. The technique has potential applications in civil engineering materials.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Energy & Fuels
Hongli Fan, Fenghai Li, Qianqian Guo, Mingxi Guo
Summary: The study found that peanut hull ash has effects on the initial sintering and fusion temperatures of high melting coal ashes, causing a continuous decrease in initial sintering temperatures and the formations of various mineral phases in coal ash mixtures.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Environmental Sciences
M. Wieckowski, A. Dudzinska
Summary: Using fly ash in hard coal mines may increase hydrogen concentrations in the mine atmosphere, leading to incorrect fire risk assessment. The experiment showed that fly ash from a coal and biomass-fired boiler released much higher amounts of hydrogen compared to ash from a coal-fired boiler.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Avinash Chaurasiya, Manish Anand, Rajdeep Singh Rawat
Summary: Using numerical simulations, this study examines magnetization switching in a two-dimensional artificial spin ice (ASI) system using peanut-shaped nanomagnets. It also explores the influence of an external magnetic field on the degeneracy of the magnetic states in this system. The findings suggest that the proposed ASI system with peanut-shaped nanomagnets has a smaller switching field compared to conventionally used highly-anisotropic nanoislands, and that the degeneracy of the magnetic state can be controlled by adjusting the external magnetic field.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Condensed Matter
S. Das, R. K. Dokala, B. Weise, R. Medwal, R. S. Rawat, P. K. Mishra, S. Thota
Summary: A study on the crystal structure, magnetic characteristics, and phonon instabilities of Dy1-xCexCrO3 solid-solutions reveals the significant influence of Ce doping on the crystal structure and magnetism.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Energy & Fuels
Alessio Tafone, Sundar Raj Thangavelu, Shigenori Morita, Alessandro Romagnoli
Summary: The global increase in demand for space cooling is posing a significant energy challenge with potential impacts on the electricity system and the environment. Decentralized polygeneration systems have the potential to address this issue by efficiently providing multiple energy services in urban districts, particularly in tropical regions with high cooling demands. However, there is still a lack of systematic research on the decarbonization potential of these systems in tropical climates. This study investigates the techno-economic and environmental benefits of a cryo-polygeneration system in a cooling dominated environment, aiming to become a showcase for urban solutions in tropical climates.
Article
Thermodynamics
Haotong Cai, Zihan Ye, Guokun Liu, Alessandro Romagnoli, Dongxu Ji
Summary: With the advancement of thermoelectric material properties, the thermoelectric generator has gained more attention in heat recovery. The design parameters significantly affect the performance of TE modules and systems. Interestingly, integrating more thermoelectric modules does not always lead to higher economic performance, output power, and energy efficiency. This study proposes a novel sizing method to find the optimal size parameters for both module and system levels. Through a case study on exhaust gas from a truck engine, the analytical results provide guidance for thermoelectric generator system designs and facilitate large-scale industrial applications.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Dongxu Ji, Haotong Cai, Zihan Ye, Ding Luo, Guohua Wu, Alessandro Romagnoli
Summary: With the rapid development of thermoelectric materials, the thermoelectric generator (TEG) is on the verge of wider commercial application. This study compares the techno-economic feasibility of TEG and organic Rankine cycle (ORC) for power generation from low to medium temperature heat sources. Technical constraints such as output power and efficiency, as well as economic metrics including net present value, internal rate of return, and payback period, are considered as evaluation indicators. The comparison results provide insights into the current and future prospects of waste heat recovery and geothermal industry.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Physics, Applied
Sourabh Manna, Rohit Medwal, Surbhi Gupta, John Rex Mohan, Yasuhiro Fukuma, Rajdeep Singh Rawat
Summary: Ferromagnet/nonmagnet (FM/NM) bilayer-based spin Hall nano-oscillators (SHNOs) have potential for low-power physical reservoir computing systems. However, most studies require an external biasing magnetic field, limiting their practical implementation. This study demonstrates biasing field-free operation of a FM/NM bilayer-based SHNO using magnetic anisotropy control, which can significantly modify the auto-oscillation characteristics and reduce the threshold current for auto-oscillation.
APPLIED PHYSICS LETTERS
(2023)
Article
Thermodynamics
Manuel Jimenez-Arreola, Christoph Wieland, Alessandro Romagnoli
Summary: This paper presents a test rig to study the effect of the geometry of an ORC evaporator in mitigating the adverse effects of thermal power fluctuations from a waste heat source. Experimental results show that a finned tube heat exchanger design can significantly reduce the thermal inertia of the system and dampen the variations of the heat source transmitted to the ORC system, enabling more stable operation.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Alessio Tafone, Roberto Pili, Martin Pihl Andersen, Alessandro Romagnoli
Summary: Carnot batteries are an emerging thermo-mechanical energy storage technology that converts surplus electricity into heat and then back into electricity. This study investigates a novel configuration of the thermal energy storage system using a cascade of multiple phase change materials to enhance energy density and round trip efficiency.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yuancheng Lou, Guokun Liu, Alessandro Romagnoli, Dongxu Ji
Summary: This study proposes a novel combined system of Organic Rankine cycle (ORC) and thermoelectric generators (TEG) to boost geothermal power generation. The system utilizes a coaxial casing geothermal well with a thermoelectric generator layer. The integrated simulation model for both underground and aboveground power generation has been verified with experiments, showing a significant improvement in power output, heat extraction, and overall efficiency compared to a standalone ORC system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Arun Jacob Mathew, John Rex Mohan, Ruoyan Feng, Rohit Medwal, Surbhi Gupta, Rajdeep Singh Rawat, Yasuhiro Fukuma
Summary: In this study, a spintronic device called spin Hall oscillator (SHO) is used as the reservoir in reservoir computing (RC) architecture. By evaluating the memory capacity of the SHO system with micromagnetic simulations, it is found that the reservoir's memory capacity is correlated with its efficiency in performing temporal tasks.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Engineering, Environmental
Hua Yu, Yaolin Yi, Alessandro Romagnoli, Wooi Leong Tan
Summary: Singapore's high water table can be improved by cement stabilization when liquefied natural gas (LNG) storage systems are built underground. However, there is limited research on the effect of ultralow temperature on cement-stabilized soil. This study conducted laboratory experiments to investigate the physical and mechanical properties of cement-stabilized soils at temperatures as low as -120 degrees C.
JOURNAL OF COLD REGIONS ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Fan Wang, Yuan Lv, Xinran Xia, Lizhong Yang, Dawei Guan, Chuanxiao Cheng, Wenfeng Hu, Lunxiang Zhang, Alessandro Romagnoli, Jiafei Zhao, Yongchen Song
Summary: This study investigates the unique characteristics of Tetrabutylammonium bromide (TBAB) semi-clathrate hydrate phase change, including phase separation, three-dimensional structure, and thermal effects. The optimal concentration of TBAB hydrate for energy storage is determined and verified experimentally for the first time. The findings provide important guidance for the applications of TBAB hydrate in gas capture and energy storage.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Physics, Fluids & Plasmas
Mahima Upadhyay, Mahesh Choudhary, Mayank Mishra, Rishi Verma, A. Kumar, Rajdeep Singh Rawat, S. K. H. Auluck
Summary: Studies have found that a significant portion of neutron emission in dense plasma focus is caused by fast deuterons with prominent azimuthal motion. Recent observations have shown long-lasting neutron emission and neutron flux asymmetry in certain plasma focus systems. The presence of azimuthal motion indicates the existence of an electric field and a magnetic field, which also results in poloidal magnetic flux emission from the plasma focus. A diagnostic technique for detecting this emission has recently been proposed and demonstrated successfully.
PHYSICS OF PLASMAS
(2023)
Proceedings Paper
Green & Sustainable Science & Technology
Sundar Raj Thangavelu, Kunna Wu, Tafone Alessio, Alessandro Romagnoli, Shigenori Morita
Summary: With the decreasing cost of distributed technologies and digitalization, buildings are becoming active market participants. This study proposes a design optimization methodology to achieve potential cost savings in buildings by identifying the optimal capacities of onsite renewables and other distributed technologies.
2022 6TH INTERNATIONAL CONFERENCE ON GREEN ENERGY AND APPLICATIONS (ICGEA 2022)
(2022)
Review
Computer Science, Interdisciplinary Applications
Y. Maksum, A. Amirli, A. Amangeldi, M. Inkarbekov, Y. Ding, A. Romagnoli, S. Rustamov, B. Akhmetov
Summary: The development of advanced structures using modern manufacturing methods has become attractive due to various benefits it offers. Design tools such as topology optimization have played a significant role in facilitating these developments. By analysing various research studies, it is evident that the latest trends focus on the application of graphics processing units and machine learning in computational acceleration techniques.
JOURNAL OF INDUSTRIAL INFORMATION INTEGRATION
(2022)
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)