Article
Chemistry, Physical
Binjing Zhang, Xiaoqiu Ye, Wenhua Luo, Ge Sang
Summary: This paper investigates the adsorption characteristics of oxygen on the ZrCo(110) surface and discusses the effect of oxygen occupying active sites on hydrogen adsorption behavior. The results show that the presence of oxygen at the active sites increases the dissociation barrier of H2 and significantly decreases the probability of hydrogen adsorption and dissociation. Additionally, oxygen also reduces the adsorption energy and stability of H atoms on the O-ZrCo(110) surface, as well as inhibits H atom diffusion on the surface and into the bulk.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Davide Adinolfi, Michela Costa, Adolfo Palombo, Daniele Piazzullo
Summary: This paper presents a numerical study and optimization of a cogeneration plant installed in an industrial site, focusing on seasonal storage of hydrogen to meet energy needs and reduce environmental impact. Two alternatives are analyzed, and the dynamic response and economic analysis are conducted to evaluate their performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Wojciech Uchman, Janusz Kotowicz, Kin Fun Li
Summary: This paper investigates the application differences between a micro-cogeneration device with electrical energy storage and a standalone mu CHP system, showing a positive effect of electricity storage on self-sufficiency levels. The results are valuable for considering the structure of distributed energy systems.
Article
Chemistry, Physical
Xinhe Qu, Gang Zhao, Jie Wang
Summary: This study proposes two hydrogen and electricity cogeneration schemes based on the iodine-sulfur process for a VHTR with an outlet temperature of 950 degrees C. Energy and exergy analysis show that the overall hydrogen and electricity efficiency of S1 is higher than S2, at 43.6% and 39.2% respectively. According to the analysis results, the steam generators are identified as the components with the highest exergy loss coefficient and hold the key for improving system performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Peter Ellersdorfer, Amr Omar, Robert A. Taylor, Rahman Daiyan, Greg Leslie
Summary: The study compares the water demands and operating costs of a solar-driven electrolyser facility using reverse osmosis or low-temperature multi-effect distillation. The results show that low-temperature multi-effect distillation has lower costs and produces surplus water for other uses. This suggests that thermal desalination is a compelling option for large-scale production of green hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
L. C. Juarez-Martinez, G. Espinosa-Paredes
Summary: The HTTR-GT/H2 plant is a nuclear power cogeneration plant for hydrogen production based on the sulfur-iodine cycle, with a power conversion system using a Bryton-cycle helium gas turbine. A preliminary dynamic simulator for the power conversion system was developed, showing good agreement with reported values for reactor power, coolant outlet temperature, and conversion system components.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
A. Yaktiti, A. Dreano, R. Gass, T. Yvert, J. F. Carton, F. Christien
Summary: Two numerical models were developed to simulate hydrogen transport in porous metals, taking into account gaseous hydrogen trapping. They were applied to study hydrogen permeation in cast steel at room temperature. The simulations revealed that the two models are equivalent under certain conditions. Parametric analysis was conducted to investigate the effect of external hydrogen fugacity, hydrogen solubility, and porosity fraction on hydrogen diffusion behavior. The comparison between experimental data and numerical results showed reasonable agreement without any parameter adjustment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Gabriele Battista, Emanuele de Lieto Vollaro, Andrea Vallati, Roberto de Lieto Vollaro
Summary: The urgency to minimize waste is underscored by the current global context, characterized by crises such as climate change, the pandemic, and the depletion of fossil fuel resources. Cogeneration technology, particularly micro-cogeneration, offers a promising solution to enhance energy efficiency and reduce environmental impact. This study assesses the technical and financial feasibility of a micro-cogeneration plant using natural gas-fuelled internal combustion engines and provides valuable guidance for policymakers and industry stakeholders. The results demonstrate the importance of optimizing energy production, minimizing waste, and considering the thermal load variation in order to achieve maximum energy, emission, and financial benefits.
Article
Chemistry, Physical
T. C. Cui, J. Shang, Z. L. Hua, W. Z. Peng, J. F. Shi, P. Xu, C. H. Gu
Summary: This study aimed to predict the hydrogen-induced fracture behavior of low alloy steel under a high-pressure hydrogen gas environment. The proposed approach using coupled cohesive modeling showed good agreement with experimental results for 4130X steel disk. The accumulation of hydrogen at the anchorage of the disk reduced the maximum cohesive stress and increased the crack growth rate under a high-pressure hydrogen gas environment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Masoud Moshtaghi, Mahdieh Safyari, Gregor Mori
Summary: This study investigates the impact of the microstructure of electrodeposited ZnNi coatings, particularly pores and microcracks, on the characteristics of hydrogen diffusion at room temperature. The results show that the presence of microcracks significantly affects the behavior of hydrogen diffusion, while the high grain boundary density in nanostructured coatings leads to a lower content of diffusible hydrogen.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Fuqiang Yang, Tao Yan, Wenjuan Zhang, Haibing Zhang, Lingyan Zhao
Summary: This study aims to develop a robust numerical strategy to simulate the full coupling of hydrogen diffusion and crystal anisotropic behavior. The results show that the redistribution of hydrogen near the grain boundary is driven by the hydrostatic pressure caused by misoriented grains.
Article
Thermodynamics
Tomasz T. Walek
Summary: The cost allocation of micro-cogeneration systems used in multi-family residential buildings is currently limited, as it does not allow for proper division of costs between owners. However, a new cost allocation method and cost clearance system can address this issue by using energy meters to distinguish between grid and cogeneration power sources, and equally dividing operating costs among community members. This can reduce energy prices and has the potential to supplement national power grids and promote the development of green energy systems.
Article
Thermodynamics
Maria Cristina Cameretti, Alessandro Cappiello, Roberta De Robbio, Raffaele Tuccillo
Summary: In this study, a low environmental impact and innovative hybrid power plant for distributed energy is introduced. The plant combines a 30 kW micro gas turbine, a solar field, and a bottoming ORC system. The plant operates on hydrogen fuel with steam injection to reduce NOx formation. It also offers flexibility in generating electricity or providing heat through cogeneration.
Article
Materials Science, Multidisciplinary
Shulin Yuan, Yaxin Zhu, Minsheng Huang, Lv Zhao, Shuang Liang, Zhenhuan Li
Summary: Informed by the current understanding of hydrogen-dislocations/vacancies interactions, a coupled diffusional-mechanical model is developed to capture hydrogen diffusion and trapping in nickel alloy. The model shows good agreement with experimental results and highlights the dominance of strain-induced vacancies in hydrogen trapping behavior. The impact of hydrogen-saturated vacancies on hydrogen diffusion and trapping is characterized by the effective trap concentration. The model also provides insights into the influence of hydrogen on plastic localization and interface rupture, which is important for modeling hydrogen embrittlement.
MECHANICS OF MATERIALS
(2023)
Article
Thermodynamics
Giuseppe Tilocca, David Sanchez, Miguel Torres-Garcia
Summary: Micro Gas Turbines (MGTs) are small devices used for on-site power and heat generation, but their commercialization has not met expectations. This study applies the Theory of Constraints to the MGT industry, identifying root causes of the lack of commercial success through constraint analysis. The authors suggest combining market-driven innovation and commercialization as a long-term solution, but acknowledge limitations in their proposed methodology and solutions.
Article
Business
Luc Soete, Bart Verspagen, Thomas H. W. Ziesemer
Summary: Despite R&D activities being carried out in public research institutes, there have been few studies exploring the economic impact of such public investment. This paper analyzes the relationship between total factor productivity (TFP) and public and private R&D in 17 OECD countries. The findings show that public R&D investment has a positive effect on TFP growth in the majority of countries. A strong complementarity between public and private R&D is observed, and increasing public R&D investment enhances TFP impact.
INDUSTRIAL AND CORPORATE CHANGE
(2022)
Article
Economics
Luc L. G. Soete, Bart Verspagen, Thomas H. W. Ziesemer
ECONOMICS OF INNOVATION AND NEW TECHNOLOGY
(2020)
Article
Economics
Onder Nomaler, Bart Verspagen
ECONOMICS OF INNOVATION AND NEW TECHNOLOGY
(2020)
Article
Economics
Huub Meijers, Onder Nomaler, Bart Verspagen
JOURNAL OF EVOLUTIONARY ECONOMICS
(2019)
Article
Economics
Ad Notten, Jacques Mairesse, Bart Verspagen
ECONOMICS OF INNOVATION AND NEW TECHNOLOGY
(2017)
Article
Economics
Alfonso Gambardella, Dietmar Harhoff, Bart Verspagen
JOURNAL OF ECONOMICS & MANAGEMENT STRATEGY
(2017)
Article
Economics
Isabel Maria Bodas Freitas, Bart Verspagen
JOURNAL OF EVOLUTIONARY ECONOMICS
(2017)
Article
Economics
Pierre Mohnen, Arthur Vankan, Bart Verspagen
OXFORD REVIEW OF ECONOMIC POLICY
(2017)
Article
Economics
Onder Nomaler, Bart Verspagen
JOURNAL OF ECONOMIC GEOGRAPHY
(2016)
Article
Development Studies
Kristine Farla, Denis De Crombrugghe, Bart Verspagen
Article
Economics
Adam Szirmai, Bart Verspagen
STRUCTURAL CHANGE AND ECONOMIC DYNAMICS
(2015)
Article
Business
Marco Capasso, Tania Treibich, Bart Verspagen
SMALL BUSINESS ECONOMICS
(2015)
Article
Business
Martin Srholec, Bart Verspagen
INDUSTRIAL AND CORPORATE CHANGE
(2012)
Article
Management
Samyukta Bhupatiraju, Onder Nomaler, Giorgio Triulzi, Bart Verspagen
Article
Business
Tommy Clausen, Mikko Pohjola, Koson Sapprasert, Bart Verspagen
INDUSTRIAL AND CORPORATE CHANGE
(2012)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
