Article
Chemistry, Physical
Shuang Xing, Chen Zhao, Shuai Ban, Huaming Su, Ming Chen, Haijiang Wang
Summary: This paper demonstrates a hybrid fuel cell system integrated with a methanol steam reformer and methanation reactor for direct electric power generation in a low-temperature polymer electrolyte fuel cell. Optimum conditions for methanol steam reforming and methanation reactions are verified experimentally, and power density comparisons between different fuels are provided, showing potential for commercialization of the fuel cell technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xi Chen, Shichun Long, Chunxi Wang, Fasen Chai, Luling Li, Pengfei Duan, Shi Li, Zhongmin Wan, Zhiguo Qu
Summary: A hybrid PEMFC multi-generation system model integrated with solar-assisted methane cracking is established. It consists of a disc type solar collector, PEMFC, and Organic Rankine cycle (ORC). Methane is cracked by solar energy to generate hydrogen, which provides power and heat. The waste heat and hydrogen are efficiently utilized to generate electricity through ORC and PEMFC. The system's performance is investigated by mapping the relationships between thermodynamic parameters and economic factors. The results show high exergy utilization factor, energy efficiency, and solar-chemical energy conversion efficiency. The system also achieves greenhouse gas emission reductions and low levelized cost of energy. After operation, significant GHG emission reduction and carbon recovery are achieved, promoting the popularization of PEMFC in zero energy buildings.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Shengying Xiao, Jiawei Xu, Yifei Wang, Jingyi Wang, Xinhai Xu
Summary: This study develops a methanol processing system consisting of a methanol reformer and two-stage preferential oxidation reactors. The system achieves stable methanol conversion and high-purity hydrogen production. Experimental results demonstrate the system's ability to effectively reduce carbon monoxide concentration to meet the requirements of fuel cells. Stability testing shows that the integrated system has good operational stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
M. B. Danoune, A. Djafour, Yue Wang, A. Gougui
Summary: The study proposed using the Whale Optimization Algorithm (WOA) to establish accurate and reliable PEMFC models to increase accuracy by minimizing error between experimental and estimated polarization curves. The effectiveness of WOA in modeling the PEMFC generators was demonstrated through a series of experiments on the Heliocentris FC50 PEMFC test bench.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Paulo A. B. de Sampaio
Summary: Desalination technologies, particularly membrane distillation (MD), are effective in addressing water scarcity issues. This study focuses on modelling a Direct Contact Membrane Distillation (DCMD) plant with heat recovery, using a multiscale approach to address the problem and achieving good agreement with experimental data. The methodology presented in this work can be applied to simulate the performance of DCMD desalination plants with heat recovery.
Article
Thermodynamics
Menghua Liu, Yixiang Shi, Ningsheng Cai
Summary: This study proposes a new tubular structure for a high-temperature proton exchange membrane fuel cell (PEMFC) integrated with a built-in packed-bed methanol steam reformer to provide hydrogen. A 2D axisymmetric non-isothermal model was developed to simulate the performance of both the tubular PEMFC and the packed-bed methanol reformer. The model considers multiple physical processes, including methanol reforming, water gas shift reaction, methanol cracking, and heat, mass, and momentum transport. The results show that stable power generation and temperature control can be achieved by controlling the methanol flow rate, working voltage, and the methanol space-time ratio.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Energy & Fuels
Jinlong Yang, Rui Li, Chul-Hee Lee
Summary: Hydrogen energy has advantages in reducing greenhouse gas emissions, but the energy supply system needs to be redesigned to meet heating/cooling needs and hydrogen energy goals. Using resource analysis, a technical plan for triple cogeneration of hydrogen greenhouse can improve the comprehensive utilization efficiency of system energy.
FRONTIERS IN ENERGY RESEARCH
(2023)
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
Ali Ghodba, Mahdi Sharifzadeh, Davood Rashtchian
Summary: The study investigates the integrated design and operation of a mobile power generation system consisting of a microreactor reformer and a proton exchange membrane fuel cell (PEMFC) using simulation-optimization programming. Results show that the implemented procedure ensures the economic and flexible operation of the process while satisfying safety constraints.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Fernando M. L. Amorim, Rudy Crisafulli, Jose J. Linares
Summary: This study presents the results of a glycerol alkaline-acid electrolyzer, which can produce hydrogen and electricity simultaneously at low current densities and operate in electrolysis mode at high current densities. Maximum power densities and hydrogen flux increase with temperature in the spontaneous region. The electroreformer demonstrates stable performance over a 12-hour chronoamperometric test.
Article
Energy & Fuels
R. Ben-Mansour, M. A. Haque, M. A. Habib, S. Paglieri, A. Harale, E. M. A. Mokheimer
Summary: This study aims to investigate the effect of thermal boundary conditions on steam-methane reforming (SMR) and hydrogen recovery. Computational analysis is performed to examine the impact of constant and variable temperatures/heat fluxes, as well as radiation and transient inlet temperatures, on important parameters such as CH4 conversion, H2 recovery, H2 mass flow rates, and hydrogen mass flux through the membrane. The results show that increasing the reformer temperature leads to a higher methane conversion but a lower hydrogen recovery. Segmented conditions result in decreased methane conversion but increased hydrogen recovery compared to constant heat flux and temperature cases. Additionally, varying the temperature profile affects the conversion and recovery rates differently.
Article
Engineering, Chemical
Han-Young Do, Chang-Hyun Kim, Jae-Yun Han, Han-Sung Kim, Shin-Kun Ryi
Summary: To produce hydrogen with low CO concentration, steam methane reforming was conducted in a Pd membrane reactor containing a methanation catalyst on the permeation side. By using a two-step vacuum-assisted electroless plating method, hydrogen selectivity was increased significantly and CO concentration was reduced to 200 ppm, making it suitable for use in LT-PEMFCs. Introducing a methanation catalyst on the permeation side further lowered the CO concentration to 4 ppm in the permeate stream, with 97.7% H2 content, which is ideal for LT-PEMFCs.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Thermodynamics
Youwen Zhang, Xi Wu, Shiming Xu, Qiang Leng, Sixue Wang
Summary: In this study, a serial system of multi-stage RED sacks was proposed to improve the energy efficiency and working performance of direct hydrogen production. Experimental results showed that reducing the working current while increasing the number of RED stacks improved both hydrogen production and power output significantly.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Ahmed Fathy, Mohammad Ali Abdelkareem, A. G. Olabi, Hegazy Rezk
Summary: This study proposes a novel strategy based on a salp swarm algorithm for extracting the maximum power of proton-exchange membrane fuel cell. By comparing with other programmed approaches, the results demonstrate high reliability and efficiency of the proposed strategy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xia Zhang, Qing Sheng Wei, Byeong Soo Oh
Summary: Diesel engine power plants are still widely used on remote islands in South Korea, but they have disadvantages. A case study conducted on Ui Island aimed to provide a zero emissions solution using renewable energy sources in an off-grid application. The PV/wind/battery/PEMFC system was found to be the best system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Sara Bellocchi, Giuseppe Leo Guizzi, Michele Manno, Marzia Pentimalli, Marco Salvatori, Alessandro Zaccagnini
Article
Thermodynamics
Sara Bellocchi, Giuseppe Leo Guizzi, Michele Manno, Marco Salvatori, Alessandro Zaccagnini
APPLIED THERMAL ENGINEERING
(2018)
Article
Thermodynamics
Sara Bellocchi, Marco Gambini, Michele Manno, Tommaso Stilo, Michela Vellini
Article
Energy & Fuels
Marco Gambini, Michela Vellini, Tommaso Stilo, Michele Manno, Sara Bellocchi
Article
Thermodynamics
Sara Bellocchi, Marcello De Falco, Marco Gambini, Michele Manno, Tommaso Stilo, Michela Vellini
Article
Energy & Fuels
Sara Bellocchi, Michele Manno, Michel Noussan, Michela Vellini
Article
Energy & Fuels
Sara Bellocchi, Kai Kloeckner, Michele Manno, Michel Noussan, Michela Vellini
Article
Thermodynamics
Sara Bellocchi, Michele Manno, Michel Noussan, Matteo Giacomo Prina, Michela Vellini
Article
Thermodynamics
S. Bellocchi, R. De Iulio, G. Guidi, M. Manno, B. Nastasi, M. Noussan, M. G. Prina, R. Roberto
Article
Chemistry, Physical
Marco Gambini, Federica Guarnaccia, Maria Luisa Di Vona, Michele Manno, Michela Vellini
Summary: This paper aims to provide a comprehensive and reliable model for the catalytic hydrogenation and dehydrogenation of liquid organic hydrogen carriers (LOHCs). The study takes into account the occurrence of high-temperature phenomena and introduces two novel modifications to make the model applicable over a wide temperature range.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Sara Bellocchi, Paolo Colbertaldo, Michele Manno, Benedetto Nastasi
Summary: This study uses a holistic approach to quantitatively analyze the effect of different hydrogen energy pathways on the Italian energy system. The results confirm the beneficial impact of hydrogen and identify three hydrogen-based pathways in the optimized energy scenarios. These pathways include the production of synthetic natural gas, direct hydrogen consumption, and the production of synthetic liquid fuel. The study shows that CO2 emissions can be reduced by up to 49% within the investigated scenarios, with an increase in annual costs of 8%.
Article
Chemistry, Physical
Marco Gambini, Federica Guarnaccia, Michele Manno, Michela Vellini
Summary: Liquid organic hydrogen carriers (LOHCs) are considered a promising hydrogen storage technology. This paper describes a procedure to optimize the thermal design of a reactor based on a lumped-parameter model for improved heat transfer performance and minimum power consumption. Heat transfer performance is evaluated using a newly defined dimensionless parameter, the Heat Transfer Ratio (HTR).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Sara Bellocchi, Marcello De Falco, Marco Facchino, Michele Manno
Summary: This paper provides a detailed analysis of the impact of hydrogen blending in the natural gas grid, including the increase of Intermittent Renewable Energy Source (IRES) penetration, electrolyzer power installed, reduction of CO2 emission, and environmental footprint. The study indicates that blending hydrogen in the natural gas grid leads to beneficial impacts on the environment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Marco Gambini, Federica Guarnaccia, Michele Manno, Michela Vellini
Summary: This paper presents an analytical assessment of the energy-power relationship for different material-based hydrogen storage systems. It explores the impact of power demand on the amount of discharged hydrogen and the utilization factor. The results show that metal hydrides have higher specific power compared to liquid organic hydrogen carriers. The study provides insights into the discharge duration and energy utilization of hydrogen storage systems.
JOURNAL OF ENERGY STORAGE
(2024)
Article
Green & Sustainable Science & Technology
M. Vellini, S. Bellocchi, M. Gambini, M. Manno, T. Stilo
JOURNAL OF CLEANER PRODUCTION
(2020)
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.