Article
Thermodynamics
Zherui Ma, Jiangjiang Wang, Fuxiang Dong, Zepeng Han, Lei Tian, Rujing Yan, Zhanwei Liang
Summary: A novel solid-oxide-fuel-cell-based cooling, heating, and power system with integrated chemical looping hydrogen generation is proposed in this study. The system achieves high-efficiency CO2 capture and hydrogen supply to fuel cells, avoiding carbon deposition issues. By incorporating a high-temperature solar heat collector, the system can improve power generation efficiency and energy cascade utilization. The results show significant reductions in energy consumption of CO2 capture and potential improvements in energy and exergy efficiencies by optimizing system parameters such as SOFC operating temperature.
Article
Thermodynamics
Bo Wang, Xian Li, Xuancan Zhu, Yuesen Wang, Tian Tian, Yanjun Dai, Chi-Hwa Wang
Summary: This study proposes a novel epitrochoidal rotary reactor for efficient solar-driven water-splitting. The focus is on the geometry optimization to achieve optimal thermodynamic solar-to-fuel energy conversion efficiency. Mathematical descriptions of kinematic synthesis of the conjugate rotor and stator profiles are derived. A thermodynamic model considering heat recovery is developed to evaluate the reactor's performance. The cam-to-rotor size ratio and the number of rotor sides are found to significantly impact the solar-to-fuel energy conversion efficiency.
Article
Chemistry, Physical
Xianda Sun, Yuxuan Lou, Ya-Ling He, Yinshi Li
Summary: The study introduces an electricity-hydrogen co-produced Na-ion direct formate fuel cell, which can continuously produce electricity and hydrogen, showcasing high efficiency and renewability, indicating great potential.
JOURNAL OF POWER SOURCES
(2021)
Article
Thermodynamics
Hongsheng Wang, Rufan Yang, Bingzheng Wang, Zenghao Wei, Hui Kong, Xiaofei Lu, Jian Jin
Summary: In this study, a thermodynamic analysis of solar-driven methanol steam reforming reaction in a Pd-Ag membrane reactor was conducted. The results showed that, under optimized reaction conditions, the conversion rate of methanol reached high levels and purified hydrogen and carbon dioxide could be collected separately. Due to the use of solar energy and the membrane reactor, it is predicted that significant coal and carbon dioxide savings can be achieved.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Bingzheng Wang, Xiaofei Lu, Sean-Thomas B. Lundin, Hui Kong, Jian Wang, Bosheng Su, Hongsheng Wang
Summary: By combining DRM with RWGS in a membrane reactor, CO2 can be converted into fuels, improving energy efficiency and reducing CO2 emissions, showing feasibility.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Dawood Hjeij, Yusuf Bicer, Muammer Koc
Summary: A hybrid renewable-based integrated energy system for power-to-X conversion is designed and analyzed, producing hydrogen, electricity, heat, ammonia, urea, and synthetic natural gas (SNG). The system utilizes solid oxide electrolyzers and fuel cells to produce and store hydrogen for power generation from solar energy. Ammonia, urea, and synthetic natural gas are produced as energy carriers or valuable chemical products. The system's energy efficiency is 56%, while the exergy efficiency is 14%, with the highest exergy destruction occurring in the Rankine cycle. The mass flow rates of the produced chemicals are 0.064, 0.088, and 0.048 kg/s for ammonia, urea, and SNG, respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Qiushi Wang, Liqiang Duan, Ziyi Lu, Nan Zheng
Summary: The paper presents a comparative analysis of SOFC-MGT-CCHP systems coupled with two solar methane steam reforming processes in terms of energy, exergy, environmental and economic performances. The results show that the second system achieves higher solar thermochemical efficiency, energy efficiency, and exergy efficiency than the first system, with increases of 19.05%, 7.51%, and 3.63% respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Dmitry Pashchenko, Ravil Musta, Igor Karpilov
Summary: Ammonia is a prospective alternative to hydrocarbon fuels, with projects for developing ammonia-fired gas turbines up to 40 MW. Thermochemical exhaust gas heat recuperation systems can increase efficiency in ammonia-fired gas turbines, with the potential to recover up to 43% of exhaust heat.
Article
Energy & Fuels
Murat Koc, Yunus Emre Yuksel, Murat Ozturk
Summary: This study presents a novel multigeneration plant driven by heat energy from a nuclear reactor cooling fluid to generate useful products including electricity, heating, cooling, compressed hydrogen, drying, and freshwater. By integrating sub-plants, the overall effectiveness of the plant is targeted to be increased. The thermodynamic analysis, energy, and exergy efficiency analyses with parametric analysis were conducted to evaluate the designed multigeneration system.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Rahul R. Bhosale, Suliman Rashid
Summary: The solar-to-fuel energy conversion efficiency of the MgxFe3-xO4 based CO2 splitting cycle was estimated at varying temperatures, showing that different redox steps can affect the efficiency. Various factors including the heat energy required to heat inert gas and CO2, as well as the heat penalty associated with gas separations, were taken into account in the efficiency analysis.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Environmental Sciences
Saber Sadeghi, Ighball Baniasad Askari
Summary: Iran is facing challenges in reducing fuel consumption and CO2 emissions, leading to a need for renewable energy resources. Studies have shown that utilizing concentrated solar technology and molten carbonate fuel cells can significantly reduce CO2 emissions and improve overall efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Rishabh Sharma, Miroslav Almasi, R. C. Punia, Rahul Chaudhary, Satya Pal Nehra, Mahendra Singh Dhaka, Anshu Sharma
Summary: The globe needs to explore and study alternate energy sources due to the rapid use of fossil fuels, which will lead to an energy catastrophe in the future. Fuel cell technology, particularly Polymer Electrolyte Membrane Fuel Cell (PEMFC), is gaining wide acceptance as a renewable energy solution. This study focuses on the characteristics and importance of PEM fuel cells through experimental and theoretical observations, as well as analyzes the optimization of extracting energy from renewable sources.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Farayi Musharavati, Shoaib Khanmohammadi, J. Nondy, T. K. Gogoi
Summary: The present research introduces a novel hybrid system that integrates a salinity gradient solar pond (SGSP), a proton exchange membrane fuel cell (PEMFC), and a thermoelectric generator (TEG). By utilizing waste heat from PEMFC and recovering waste energy with TEG, the system's overall performance is improved. The study examines the energy, exergy, and economic performance of the proposed system and compares it with two alternative systems without TEG and PEMFC. A parametric study is conducted to analyze the impact of significant parameters on the system's performance. The results demonstrate the advantages of the integrated system and provide optimization strategies for achieving the best performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Ozan Sen, Omer Faruk Guler, Ceyhun Yilmaz, Mehmet Kanoglu
Summary: The multi-generation energy system utilizes geothermal and solar energy to supply electricity for residences. By utilizing resources in Afyonkarahisar province, the system can produce electricity and hydrogen for storage and utilization, with a fuel cell used for hydrogen conversion.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Mert Temiz, Ibrahim Dincer
Summary: In order to achieve sustainable development goals set by the United Nations, a unique hybrid energy system is developed to provide cleaner energy, fuel, food, and water for indigenous communities. The system is analyzed and evaluated in terms of energy and exergy efficiencies, aiming to address the UN's targets and improve sustainability in communities.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Mohammed Al-Hemyari, Mohammad O. Hamdan, Mehmet F. Orhan
Review
Thermodynamics
Amani Al-Othman, Muhammad Tawalbeh, Remston Martis, Salam Dhou, Mehmet Orhan, Muhammad Qasim, Abdul Ghani Olabi
Summary: This paper focuses on the application of artificial intelligence in hybrid renewable energy systems, discussing the integration of solar and wind energy with fuel cells, analyzing FC technology and market trends, discussing FC control strategies, and summarizing recent demonstration HRESs.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Chemistry, Physical
Shahbaz Ahmad, Tahir Nawaz, Asghar Ali, Mehmet Fatih Orhan, Ayesha Samreen, Arunachala M. Kannan
Summary: Proton exchange membrane fuel cells are considered efficient and clean energy conversion devices, but their high manufacturing cost remains a major barrier to their general acceptance and commercialization. Lowering the cost of the electrolyte and catalyst is the main strategy for reducing fuel cell cost. The development of low-cost and high-performance electrolyte membranes is a top priority.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Hanin Atwany, Anfal Al-Abdullah, Mehmet Fatih Orhan
Summary: A mathematical model was developed to evaluate the performance of Molten Carbonate Fuel Cells (MCFC) and the effects of temperature, pressure, and exchange current density were analyzed. The study also evaluated the impact of reactant flow rates and heat generation, and conducted a parametric study to determine optimum operating conditions.
ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS
(2022)
Article
Engineering, Chemical
Mehmet Fatih Orhan, Kenan Saka, Mohammad Yousuf
Summary: This study focuses on the thermodynamic analysis and modeling of polymer electrolyte membrane fuel cells (PEMFC) for portable applications, specifically for powering a computer. An inclusive evaluation of various parameters reveals the direct influence of current density and temperature values on the optimization of the design parameters.
ADVANCES IN POLYMER TECHNOLOGY
(2022)
Review
Energy & Fuels
Ahmed T. Hamada, Mehmet F. Orhan
Summary: This literature review provides a concise and holistic discussion of the fundamentals of regenerative braking systems, including their history, competing technologies, types, characteristics and limitations, applications, vehicle dynamics, and evaluation factors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Multidisciplinary Sciences
Ahmad Alsaghir, Mohammad O. Hamdan, Mehmet F. Orhan
Summary: This paper examines the energy separation in vortex tubes through numerical simulations and investigates the impact of different working fluids on the performance of the vortex tube. The study also analyzes the influence of fluid properties on energy separation.
SN APPLIED SCIENCES
(2022)
Article
Thermodynamics
Kenan Saka, Mehmet Fatih Orhan
Summary: The efficiency of a polymer electrolyte membrane fuel cell was investigated in this study. The results showed that optimizing the operating parameters can significantly increase the overall stack efficiency.
Article
Green & Sustainable Science & Technology
Karim Mohamed Ragab, Mehmet Fatih Orhan, Kenan Saka, Yousef Zurigat
Summary: This study investigated the energy efficiency and conservation status of a large school building in the northern part of the United Arab Emirates. Through energy auditing and thermography scanning, potential ways to reduce school energy consumption were identified. It is anticipated that significant energy cost savings can be achieved by implementing energy-saving measures such as installing motion sensors.
Article
Multidisciplinary Sciences
Abdul Hai Alami, Mehmet Orhan, Rashid Al Rashid, Ahmad Yasin, Ali Radwan, Mohamad Ayoub, Mohammad Ali Abdelkareem, Adnan Alashkar
Summary: This study presents findings on using the expansion stage of compressed air energy storage systems for air conditioning purposes. The proposed setup can produce low temperature chilled water and has the potential to replace commercial compression cooling air conditioners. The system also serves as an energy storage and improves the roundtrip efficiency while handling a portion of the cooling load.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Kenan Saka, Mehmet Fatih Orhan, Ahmed T. Hamada
Summary: A study on the gas diffusion layer (GDL) in proton exchange membrane fuel cells (PEMFCs) investigates the key design concerns and restraints, as well as the existing models and materials used for the GDL. A case study of step-by-step modeling and experimental tests on a single cell under various compressions are presented. Furthermore, a parametric study considering design parameters is conducted to improve the overall efficiency of the fuel cell.
Article
Biochemistry & Molecular Biology
Aser Alaa Ahmed, Malik Al Labadidi, Ahmed T. Hamada, Mehmet Fatih Orhan
Summary: This study provides an overview of the fundamentals, principles, and evaluation factors of direct methanol fuel cells (DMFCs), and conducts a parametric investigation on a JENNY 600S DMFC. The study finds that increasing the operating temperature of the fuel cell improves its output voltage, but decreases its maximum efficiency limits.
Article
Thermodynamics
Ahmed T. Hamada, Omar Z. Sharaf, Mehmet F. Orhan
Summary: This study explores the use of nano-encapsulated phase-change material dispersion in a double-pass photovoltaic/thermal solar collector, providing optical filtering, heat transfer, and energy storage functions. The performance of the system is analyzed under different conditions, and compared to alternative configurations, showing lower cell temperatures and improved thermal and electrical performance. This research opens up possibilities for novel PV/T collectors using smart, multi-functional fluids.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Mohammed Azzam, Zabayyan Qaq, Mehmet F. Orhan
Summary: This study provides a detailed understanding of the fundamentals, thermodynamic and electrochemical principles, and system evaluation factors of a 10-kW alkaline fuel cell designed for space applications. The study includes modeling and verification, as well as a parametric study to optimize performance. The results indicate the importance of electrolyte thickness, operating temperature, and bipolar plate design in achieving higher efficiency and minimizing pressure drop.
JOURNAL OF THERMAL ENGINEERING
(2023)
Meeting Abstract
Biochemistry & Molecular Biology
Tahir Atik, Esra Isik, Yesim Aydinok, Mehmet Fatih Orhan, Yesim Oymak, Zeynep Karakas, Nazan Sarper, Canan Albayrak, Nihal Karadas, Ibrahim Eker, Selma Unal, Ozgur Cogulu, Ferda Ozkinay
EUROPEAN JOURNAL OF HUMAN GENETICS
(2022)
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.
