Article
Engineering, Chemical
Aldo Cosquillo Mejia, Sandra Afflerbach, Marc Linder, Matthias Schmidt
Summary: Calcium hydroxide has potential for thermal energy storage due to its low cost and high energy density. However, it has low thermal conductivity and tends to stick together, posing a challenge for moving bed reactors. This study developed a new reactor concept to test coated calcium hydroxide granules. The results showed that the alumina coating improved the mechanical stability of the granules under reaction conditions.
Article
Energy & Fuels
Kai Risthaus, Marc Linder, Matthias Schmidt
Summary: The reaction system based on reversible hydration of CaO shows promise for thermochemical energy storage, but the characteristics of the CaO powder present challenges for reactor implementation. To address this, a novel reactor concept based on a plow share mixer was developed and its feasibility was demonstrated.
Article
Thermodynamics
Shigehiko Funayama, Matthias Schmidt, Kyosuke Mochizuki, Marc Linder, Hiroki Takasu, Yukitaka Kato
Summary: This study combines calcium hydroxide with ceramic foam and honeycomb structures of silicon-impregnated silicon carbide, demonstrating improved power density and bulk stability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Tiziano Delise, Salvatore Sau, Anna Chiara Tizzoni, Annarita Spadoni, Natale Corsaro, Raffaele Liberatore, Tania Morabito, Emiliana Mansi
Summary: Chemical systems for thermal energy storage show promise in addressing solar irradiation fluctuation issues, and this study focused on simulating a configuration using an indirect-packed bed heat exchanger. Despite limitations in heat exchange efficiency, the results demonstrated a good storage efficiency of about 0.7.
Article
Engineering, Environmental
Bo Wang, Lifeng Li, Florian Schaefer, Johannes J. Pottas, Apurv Kumar, Vincent M. Wheeler, Wojciech Lipinski
Summary: The reduction of iron-manganese oxide particles in a high-temperature packed-bed solar thermochemical reactor was investigated using an advanced transient three-dimensional heat and mass transfer model. The validated model showed that uniform temperature distribution in the reactive packed particles is achieved and the instantaneous peak solar-to-chemical energy efficiency reaches 9.3%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
O. Bartoli, R. Chacartegui, A. Carro, C. Ortiz, U. Desideri, J. A. Becerra
Summary: This study proposes a thermochemical energy storage system for concentrated solar power plants based on the reversible hydration/dehydration process of calcium hydroxide. Through modeling and economic analysis, it is found that this system has potential economic advantages and competitiveness.
APPLIED THERMAL ENGINEERING
(2022)
Article
Physics, Multidisciplinary
C. M. Polley, H. Fedderwitz, T. Balasubramanian, A. A. Zakharov, R. Yakimova, O. Backe, J. Ekman, S. P. Dash, S. Kubatkin, S. Lara-Avila
Summary: This article reports the synthesis of two-dimensional SiC and its stability on transition metal carbides. It was found that 2D-SiC is stable at high temperatures and interacts with the surface of transition metal carbides to produce a Dirac-like feature in the electronic band structure. This finding is significant for the synthesis and application of 2D-SiC.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Environmental
Lifeng Li, Alireza Rahbari, Mahdiar Taheri, Roelof Pottas, Bo Wang, Morteza Hangi, Leanne Matthews, Lindsey Yue, Jose Zapata, Peter Kreider, Alicia Bayon, Chi-Hwa Wang, Terrence W. Simon, Joe Coventry, Wojciech Lipinski
Summary: The two-step calcium oxide based calcination-carbonation cycle is studied for carbon dioxide capture and solar thermochemical energy storage applications. The performance of an indirectly-irradiated packed-bed solar thermochemical reactor is evaluated experimentally using simulated high-flux solar irradiation. The reactor temperature peaked at 1,035 degrees C and the average solar-to-chemical conversion efficiency ranged from approximately 1.3% to 8.6% for the experimental runs. Improvements in thermomechanical characteristics, reaction chamber seals, and reactor geometry are necessary for the presented reactor design.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
X. C. Han, H. J. Xu, C. Y. Zhao
Summary: Thermochemical heat storage using a multi-layered reactor for improved pressure distribution and mathematical modeling and numerical simulations for different porosities of materials provide valuable insights for theoretical research, reactor design, and reaction optimization.
Article
Green & Sustainable Science & Technology
Heng Zhang, Shuli Liu, Ashish Shukla, Yuliang Zou, Xiaojing Han, Yongliang Shen, Liu Yang, Pengwei Zhang, Kanzumba Kusakana
Summary: This paper investigates the use of copper mesh for enhancing the thermal performance of thermochemical reactors, showing that the copper mesh method has better thermal performance, including higher temperature rise and lower pressure drop.
Article
Thermodynamics
Massimiliano Zamengo, Stephen Wu, Ryo Yoshida, Junko Morikawa
Summary: This study presents the first attempt to use a multi-objective optimization algorithm for the design of packed bed reactors with heat-transfer-enhanced materials. The optimization aims to find the optimal trade-off between heat storage density, average heat storage rate, and exergy efficiency. The results indicate that the optimal foam porosity is in the range of 70-80%, while the optimal thickness is in the range of 20-70 mm. The analysis suggests the need to improve the thermal contact conductance in packed bed reactors and thinner beds perform better for higher exergy efficiency.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Jing Ma, Wei Wei, Guotong Qin, Lei Jiang, Ngie Hing Wong, Jaka Sunarso, Shaomin Liu
Summary: This study presents an efficient reactor design that integrates an electrocatalytic packed-bed reactor with a membrane for nitrate removal. The reactor system shows excellent nitrate removal and nitrogen selectivity, highlighting the potential for large-scale nitrate remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Rui Li, Zhixin Zhao, Bo Zhang, Xiaozheng Sun, Zhen Zhang, Ying Zhang, Haitao Chen, Qiangu Yan
Summary: The study demonstrated that using CoMo carbide catalyst can effectively enhance the yield and quality of hydrotreated bio-oil. Under the preferred reaction conditions, the upgraded bio-oil showed higher carbon content and higher heating value, while significantly reducing oxygen content and total acid number.
BIOENERGY RESEARCH
(2021)
Article
Energy & Fuels
Kemal F. Hastadi, Tejas Bhatelia, Jim Patel, Paul A. Webley, Vishnu K. Pareek, Milinkumar T. Shah
Summary: This study introduces a novel forward mixed multistage packed bed reactor (FMMPBR) for methanol synthesis. The FMMPBR is divided into multiple stages with flow diverters to optimize reactant concentration and catalyst amount. Through simulation and optimization, the FMMPBR shows higher carbon conversion and lower catalyst requirement compared to the standard tubular reactor. Additionally, it achieves reduced temperature deviation and higher production rate.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Physical
Somasree Roychowdhury, Mohamed Mukthar Ali, Swati Dhua, T. Sundararajan, G. Ranga Rao
Summary: This study focuses on the dual performance of Rh/CeO2/g-Al2O3 catalyst in steam reforming of ethanol (SRE) and thermochemical water splitting (TCWS). The catalyst shows optimal temperature range for high hydrogen production and higher selectivity towards CO and CH4 at low temperatures, and it is also active for TCWS at relatively low temperatures. The proposed reaction pathways for both SRE and TCWS on this catalyst have been presented in the study.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Hiroki Takasu, Takuya Nihei, Seon Tae Kim, Yukitaka Kato
Summary: The global increase in energy consumption, especially CO2 emissions, has led to serious environmental problems. Thermochemical energy storage is considered a suitable approach to enhance the utilization of surplus or waste heat from high temperature industrial processes. The study found that adding different concentrations of potassium carbonate can increase thermal output and storage densities, with cyclic ability for repeat reactions.
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2021)
Article
Chemistry, Physical
Yasunari Shinoda, Masakazu Takeuchi, Norikazu Dezawa, Yasuhiro Komo, Takuya Harada, Hiroki Takasu, Yukitaka Kato
Summary: A new reverse build-up method is developed to fabricate an economical H-2-permeable composite membrane with excellent H-2 permeation performance, which can effectively reduce the production cost.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Yasunari Shinoda, Masakazu Takeuchi, Hikaru Mizukami, Norikazu Dezawa, Yasuhiro Komo, Takuya Harada, Hiroki Takasu, Yukitaka Kato
Summary: A thin Ni-supported Pd60Cu40 composite H2-permeable membrane was successfully developed in this study, with stable H2 permeation flux at 300-320 degrees Celsius. The improved membrane production process significantly reduced the cost of Pd.
Article
Engineering, Chemical
Rui Guo, Hiroki Takasu, Shigehiko Funayama, Yasunari Shinoda, Masahiko Tajika, Takuya Harada, Yukitaka Kato
Summary: Two types of composite pellets, non-shelled and shelled, are studied for their effects on the mechanical stability and heat transfer efficiency of a CaO/H2O/Ca(OH)(2) thermochemical energy storage system. The results show that the non-shelled composite pellets exhibit significantly reduced volume change, with CaO crystals piling up in a rod-like shape, preventing volume expansion. The shelled composite pellets demonstrate advanced performances in terms of mechanical stability, reactivity, and output/storage density.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Alexandr Shkatulov, Haruka Miura, Seon Tae Kim, Massimiliano Zamengo, Takuya Harada, Hiroki Takasu, Yukitaka Kato, Yuri Aristov
Summary: This study investigates the modification of MgO with the triple eutectic mixture LiNO3-NaNO3-KNO3 in order to improve its decarbonation performance. The composites were comprehensively characterized and tested for their sorption properties. The results show that the material has high conversion rate, CO2 uptake, and excellent heat storage capacity at high temperatures.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Shigehiko Funayama, Matthias Schmidt, Kyosuke Mochizuki, Marc Linder, Hiroki Takasu, Yukitaka Kato
Summary: This study combines calcium hydroxide with ceramic foam and honeycomb structures of silicon-impregnated silicon carbide, demonstrating improved power density and bulk stability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Metallurgy & Metallurgical Engineering
Hiroki Takasu, Junko Kaneko, Saki Yoshida, Takuya Harada, Yukitaka Kato
Summary: Thermochemical energy storage (TcES) is a promising technology for advanced energy storage. This study investigated the reaction of magnesium chloride (MgCl2) and ammonia (NH3) as TcES material at approximately 100 degrees C. Activation through NH3 absorption and desorption was confirmed to increase MgCl2 surface area and create mesopores. The activated sample demonstrated superior NH3 absorption reactivity compared to the non-activated pure MgCl2 material.
ISIJ INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Massimiliano Zamengo, Shigehiko Funayama, Hiroki Takasu, Yukitaka Kato, Junko Morikawa
Summary: This study investigates the effects of thermal conductivity and thermal contact conductance on the heat transfer performance in chemical heat storage using numerical simulations. The results show that increasing thermal conductivity alone is not sufficient for achieving the highest average heat storage rate, and thermal contact conductance is crucial for maximizing the benefits of thermal conductivity enhancement. Additionally, reducing the size of the packed bed is beneficial for achieving higher exergy efficiencies.
ISIJ INTERNATIONAL
(2022)
Article
Energy & Fuels
Seon Tae Kim, Robert Hegner, Goeksel Oezuylasi, Panagiotis Stathopoulos, Eberhard Nicke
Summary: This study investigates the performance of three reversed Rankine cycles using water vapor as the working medium under different operating conditions. The cycles with intercoolers between the first and second compression stages show higher efficiency and deliverable temperature compared to the spray-injection cycle. The study also demonstrates that the proposed high-temperature heat pump system has the potential to reduce CO2 emissions in industrial heat supply.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Rui Guo, Shigehiko Funayama, Seon Tae Kim, Takuya Harada, Hiroki Takasu, Yukitaka Kato
Summary: The study developed a new type of highly durable TCES medium with hydration reactivity enhancement by adding specific composite materials, which showed increased thermal output at 450 degrees Celsius. The enhancement in hydration reactivity was more significant under conditions closer to equilibrium.
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
