Article
Chemistry, Multidisciplinary
Haocheng Xiong, Qiwen Sun, Kedang Chen, Yifei Xu, Xiaoxia Chang, Qi Lu, Bingjun Xu
Summary: Researchers have developed a method to determine the standard adsorption enthalpy of CO on Cu surfaces using quantitative surface enhanced infrared absorption spectroscopy. The results show that on dendritic Cu at -0.75 V vs. SHE, the standard adsorption enthalpy, entropy and Gibbs free energy are 1.5 kJ mol(-1), 37.9 J/(mol K), and -9.8 kJ mol(-1), respectively. Comparison between oxide-derived Cu and dendritic Cu suggests the presence of stronger binding sites on OD Cu, which could favor multicarbon products. This work will help establish the correlation between CO binding energy and CO(2)RR activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Sayantan Mukherjee, Nawaf F. Aljuwayhel, Sasmita Bal, Purna Chandra Mishra, Naser Ali
Summary: This study investigates the characteristics of nanofluid in forced convective heat transfer and entropy generation, develops an analytical framework using mathematical models to simulate nanofluid behavior in a thermal system, and determines the optimal conditions for minimum entropy generation using genetic algorithm and DIRECT algorithm.
Article
Computer Science, Information Systems
Xiguang Li, Baolu Feng, Yunhe Sun, Ammar Hawbani, Saeed Hammod Alsamhi, Liang Zhao
Summary: This paper proposes an enhanced scatter search strategy, using opposition-based learning, to solve the problem of automated test case generation based on path coverage (ATCG-PC). The proposed ESSENT algorithm selects the path with the lowest path entropy among the uncovered paths as the target path and generates new test cases to cover the target path by modifying the dimensions of existing test cases. Experimental results show that the ESSENT algorithm outperforms other state-of-the-art algorithms, achieving maximum path coverage with fewer test cases.
INFORMATION SCIENCES
(2024)
Article
Nuclear Science & Technology
Mohammadhadi Salari, S. Talebi, Mohammad Khalvandi
Summary: Through the use of entropy generation equations, the Drift-flux method, and genetic algorithm, this paper optimized a vertical steam generator to improve efficiency and reduce entropy generation number. The study resulted in a decrease in entropy generation number value from 0.061 to 0.055 for design parameters, representing around a 10% improvement.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Energy & Fuels
Yongliang Shen, Abdur Rehman Mazhar, Pengwei Zhang, Shuli Liu
Summary: The cascaded latent heat storage (CLHS) system is favored for its remarkable heat transfer rate and heat storage capacity. In previous studies, the influence of PCM volume distribution on the system performance has been overlooked. This study optimizes the volume distribution of CLHS system and shows that the heat storage performance can be improved. The performance indicator, charged exergy, exhibits more benefits with a more uniform PCM volume distribution.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Zhongyang Zhao, Haidong Fan, Qinwu Li, Chang Liu, Chang Tan, Zhu Chen, Libin Yu, Chenghang Zheng, Xiang Gao
Summary: This paper proposes a hybrid modeling and real-time predictive scheduling method for a wet flue gas desulfurization (WFGD) system to save energy and extend its lifespan. A prediction model is established based on the mechanism of the SO2 absorption process and modified using a particle swarm optimization (PSO) algorithm with operation data. The optimal combination of circulating pumps is determined under different parameter conditions, and a real-time predictive scheduling strategy is proposed. The system achieves a 10.6% reduction in energy consumption, with an outlet SO2 concentration of 30, 15, and 10 mg/m3 as the upper limit, target, and lower limit, respectively.
Article
Geosciences, Multidisciplinary
Hossein Foroozand, Steven Weijs
Summary: This paper discusses the optimal monitoring network layout using information-theoretical methods. A single-objective optimization of joint entropy is sufficient to maximize the collection of information, and it is shown that no greedy approach can guarantee to reach the global optimum.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)
Article
Chemistry, Physical
Kohei Inagawa, Daiju Matsumura, Masashi Taniguchi, Shinya Uegaki, Tomohito Nakayama, Junnosuke Urano, Takuro Aotani, Hirohisa Tanaka
Summary: Passive autocatalytic recombiner (PAR) is a potential technology for ensuring process safety in the hydrogen society by catalytically oxidizing hydrogen to water, effectively mitigating the risk of explosions. CO is a catalyst poison that hampers catalytic reactions. In situ and time-resolved X-ray absorption spectroscopy analyses revealed that the Pt-Fe/CZY catalyst exhibited notable hydrogen oxidation activity even in the presence of CO, attributed to the combined effects of Pt-Fe alloy composition and CZY support materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Construction & Building Technology
Yan Cao, Hayder A. Dhahad, Sameer Alsharif, Kamal Sharma, A. S. El-Shafay, Teeba Ismail Kh
Summary: Efficient conversion of Municipal Solid Waste (MSW) into useful energy by anaerobic digestion is studied in this paper. The proposed combined cycle utilizes a micro gas turbine, an absorption power cycle, and electrolyzers to produce electricity and hydrogen. Performance comparison and optimization are conducted based on economic, thermodynamic, and emission indices.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Energy & Fuels
Handong Qi, Wei Li, Leilei Ji, Mingjiang Liu, Rui Song, Yunxin Pan, Yi Yang
Summary: In this paper, the particle swarm algorithm is used to find the optimal solution for the centrifugal pump impeller, aiming to improve the low efficiency, unstable operation, and high-power consumption issues in actual engineering. The entropy generation theory is applied to compare and analyze the energy losses of the original model and the optimized model. The results show that the optimized centrifugal pump has a decreased entropy generation of 5.41% and an increased efficiency of 3.89%. Turbulent entropy generation and wall entropy generation are identified as important causes of hydraulic losses in the pump.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Computer Science, Hardware & Architecture
Poonam Panwar, Mohammad Shabaz, Shah Nazir, Ismail Keshta, Ali Rizwan, R. Sugumar
Summary: UAVs and satellites provide different types of computing services, and the proposed optimization algorithm improves system performance and job response time.
COMPUTERS & ELECTRICAL ENGINEERING
(2023)
Article
Thermodynamics
Shuaihao Wang, Xiaoxiao Xia, Song Li
Summary: Cascaded adsorption chillers with DUT-67-water working pair for both low-temperature and high-temperature stage achieve the highest coefficient of performance for cooling and circulating cooling capacity. The optimized operation conditions include a hot water inlet temperature of 373 K, hot and heat recovery water mass flow rate of 0.5 kg/s, chilled water mass flow rate of 1 kg/s, adsorbent mass ratio of 1 for the low-temperature and high-temperature stage, and a cycle time of 1600 s.
APPLIED THERMAL ENGINEERING
(2021)
Article
Computer Science, Artificial Intelligence
Cheng He, Lianghao Li, Ran Cheng, Yaochu Jin
Summary: This study proposes an efficient sampling-based method for large-scale multi-objective optimization, considering convergence enhancement, diversity maintenance, and local search. Experimental results demonstrate the effectiveness of the algorithm in solving large-scale multi-objective optimization problems.
COMPLEX & INTELLIGENT SYSTEMS
(2023)
Article
Thermodynamics
Xingyu Chen, Yongjun Jian
Summary: This study investigates the entropy generation of two immiscible fluids in a conjugate heat transfer system and finds that the total entropy generation can be minimized in a two-layer thermal flow system. Specific values of physical parameter ratios can lead to this minimization of entropy generation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Computer Science, Information Systems
Xuemin Ma, Jingming Yang, Hao Sun, Ziyu Hu, Lixin Wei
Summary: This paper introduces a multiregional co-evolutionary dynamic multiobjective optimization algorithm, which effectively addresses the dynamic multiobjective optimization problems through a combination of multiregional prediction strategy and multiregional diversity maintenance mechanism, achieving good performance in experiments.
INFORMATION SCIENCES
(2021)
Article
Thermodynamics
Sagar Saren, Sourav Mitra, Takahiko Miyazaki, Kim Choon Ng, Kyaw Thu
Summary: Adsorption heat transformers (AHTs) are promising systems for upgrading waste heat. This study analyzed the performance of the AHT cycle for waste heat upgrade and thermal desalination. Different adsorbents were investigated and their performance parameters were determined. The study found significant variations in adsorbent characteristics and highlighted the importance of material selection and system design optimization in the theoretical development of the AHT cycle.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Hao Yu, Sang Won Seo, Frantisek Miksik, Kyaw Thu, Takahiko Miyazaki, Kim Choon Ng
Summary: The desiccant dehumidification system saves energy by removing latent heat and can utilize industrial waste heat and renewable energy. This study focused on the effects of regeneration air temperature and humidity ratio on the performance of a polymer-based desiccant dehumidifier. Evaluation was done based on adsorption/desorption amount, average moisture removal capacity, and latent energy ratio.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Chemical
Salman Memon, Baek-Gyu Im, Ho-Saeng Lee, Young-Deuk Kim
Summary: This paper presents experimental and theoretical studies on material-gap membrane distillation (MGMD) and water-gap membrane distillation (WGMD) to investigate the impact of different materials on permeation flux. The results show that the graphite-filled MGMD has a higher permeation flux than WGMD, while MGMD filled with silica gel and zeolite has a lower permeation flux. The permeation flux of MGMD is also influenced by the material packing density and thermal conductivity. Additionally, the MGMD permeation flux and overall thermal resistance are primarily controlled by the thermal conductivity of the material gap.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shen Liang, Hongfei Zheng, Zhiyong Zhao, Xinglong Ma, Kim Choon Ng
Summary: This paper presents an underwater solar concentrating photovoltaic-membrane distillation (CPV-MD) integrated system for coastal cities and islands with limited land resources and shortages of electricity and freshwater. A deformable solar concentrator is designed to work underwater and matched with a photovoltaic-membrane distillation module. Experimental and optical simulation results show the optical characteristics of the concentrator and the performance of the integrated system.
Article
Thermodynamics
Shahadat Hosan, Md Matiar Rahman, Shamal Chandra Karmaker, Andrew J. Chapman, Bidyut Baran Saha
Summary: This paper investigates the impact of remittances on multidimensional energy poverty in Bangladesh using a nationally representative Household Income and Expenditure Survey. The findings suggest that households with remittance income have a significantly lower level of energy poverty. The authors argue that increasing remittance inflow can contribute to alleviating energy poverty in Bangladesh and other developing nations, and therefore, national programs should be established to promote migrant workers, reduce household energy costs, and invest in modern energy technologies.
Article
Engineering, Environmental
Yu-Bin Kim, Ho-Saeng Lee, Geon-Woo Gil, Ho Ji, Young-Deuk Kim
Summary: This study provides a comprehensive overview of using gas-liquid two-phase flow with microbubbles to enhance heat and mass transfer in seawater desalination using direct-contact membrane distillation (DCMD). A swirl-flow-type microbubble generator was installed at the feed-side inlet of the DCMD module, and the results showed an 18% increase in permeation flux at a lower feed temperature and optimal air flow rate. The study also proposes a new heat transfer correlation that considers bubble size distribution to accurately predict the performance of MBG-assisted DCMD processes.
Article
Thermodynamics
Muhammad Wakil Shahzad, Doskhan Ybyraiymkul, Qian Chen, Muhammad Burhan, M. Kumja, Kim Choon Ng, Martin Birkett, Huijuan Feng, Muhammad Ahmad Jamil, Nida Imtiaz, Ben Bin Xu
Summary: The canned food market is growing due to easy access and dietary awareness, leading to increased water withdrawal and a projected supply-demand gap. Conventional desalination processes are unsustainable, while the emerging adsorption cycle offers advantages such as temperature operation and improved overall performance. This article proposes a pressure driven adsorption (PDAD) cycle to overcome limitations of conventional adsorption cycles, showing successful regeneration of silica gel and increased water production when combined with a multi effect desalination system (MED).
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Sagar Saren, Sourav Mitra, Frantisek Miksik, Takahiko Miyazaki, Kim Choon Ng, Kyaw Thu
Summary: This study investigates the impact of internal heat recovery schemes on the adsorption heat transformer (AHT) cycle. By maximizing the recovery of sensible heat between adsorber beds, the necessary uptake consumption for preheating the adsorber bed can be reduced, leading to increased useful heat ratio and exergy efficiency of the AHT cycle.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Environmental
Ravichandran Santosh, Ho-Saeng Lee, Ho Ji, Young-Deuk Kim
Summary: This study investigates the feasibility of a humidification-dehumidification (HDH) system using low-grade heat for treating high-salinity brine generated by membrane distillation. The temperature of the brine was found to influence its separation efficiency and freshwater quality. The study also highlights the impact of evaporative deposition on the chemical quality of freshwater produced.
Article
Multidisciplinary Sciences
Doskhan Ybyraiymkul, Qian Chen, Muhammad Burhan, Faheem Hassan Akhtar, Raid AlRowais, Muhammad Wakil Shahzad, M. Kum Ja, Kim Choon Ng
Summary: Dehumidification is a key challenge in the AC industry. This paper investigates an advanced microwave dehumidification method and shows significant performance improvement in the laboratory.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Jaedeok Ko, Kyaw Thu, Takahiko Miyazaki
Summary: This study investigates the energy-saving potential of managing heat rejection pressure in an R-744 transcritical system and provides quantitative data on the amount of energy that can be saved. Through simulations and experiments, the optimum heat rejection pressure and the system's dynamic performance were studied. The results show that the system can significantly reduce power consumption when the expansion valve control target is properly selected.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Environmental
Seong-Yong Woo, Jun-Sik Kim, Ji-Hoon Woo, Seung-Uk Oh, Young-Deuk Kim
Summary: This study aimed to concentrate a diluted plating solution through humidification-dehumidification (HDH) and adsorption water treatment (AWT) processes. It was found that the HDH process led to a product with contaminants, while the AWT process resulted in a product with no contaminants. The concentrated plating solution derived from the AWT process showed higher plating efficiency and corrosion resistance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Lu Wang, Hongfei Zheng, Qian Chen, Rihui Jin, Kim Choon Ng
Summary: In this study, the thermodynamic performance of the interfacial solar still under different structures and operating conditions was experimentally studied, providing an optimization direction for strengthening the distillation process. The results showed that the interfacial still could obtain maximum evaporation heat under the vertical operation condition. It was also found that a narrower interlayer spacing and a larger evaporation temperature could bring a higher equivalent heat transfer rate and evaporation efficiency. In a sunny weather, the interfacial solar still coupled with an extended condenser can reach a 4.81 kg/m2/day water yield and a 0.486 daily gained output ratio under 1 cm interlayer spacing.
Article
Thermodynamics
Muhammad Ahmad Jamil, Nida Imtiaz, Kim Choon Ng, Ben Bin Xu, Haseeb Yaqoob, Muhammad Sultan, Muhammad Wakil Shahzad
Summary: Energy-efficient space cooling is a major challenge due to high energy consumption and emissions, as well as increasing demand. Water-based cooling systems have gained attention as a sustainable and economical alternative. However, direct evaporative cooling is limited by high humidity, while existing indirect evaporative cooling systems have design limitations. The proposed innovative system addresses these limitations and offers competitive performance, with several advantages like low cost and low maintenance.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Engineering, Chemical
Muhammad Wakil Shahzad, Kim Choon Ng, Qian Chen, Ben Bin Xu
Summary: The energy-water-environment nexus is crucial for achieving the COP21 goal of limiting temperature increase below 2?. However, two third of CO2 emissions have already been used, and the remaining emissions will be depleted by 2050. Technological advancements have improved the efficiency of power and desalination sectors, but they are still operating below their thermodynamic limits.
DESALINATION AND WATER TREATMENT
(2023)
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.
