Article
Thermodynamics
Ahmed Khouya
Summary: This paper introduces a novel renewable system that combines a high performance concentrated photovoltaic thermal system with a trilateral organic Rankine cycle for power generation. Mathematical models are developed for different components of the combined system, and the results show that the system has high electric power generation and overall efficiency compared to other solar technologies.
Article
Green & Sustainable Science & Technology
Jundika C. Kurnia, Zulfan A. Putra, Oki Muraza, Seyed Ali Ghoreishi-Madiseh, Agus P. Sasmito
Summary: The study investigated the potential of converting abandoned oil wells into geothermal energy power plants and found that the Levelized Cost of Electricity (LCOE) for geothermal resources in Malaysia is relatively high, requiring multiple nearby abandoned oil wells or other renewable energy sources to reduce costs.
Article
Thermodynamics
Jincheng Zhou, Masood Ashraf Ali, Firas Muhammad Zeki, Hayder A. Dhahad
Summary: The solar tower power plant technology has great potential for large scale power generation. To reduce the electricity cost, a novel combined cycle based on supercritical Brayton cycle is proposed. This combined cycle combines the conventional Brayton cycle with an organic Rankine cycle and an absorption chiller for waste heat recovery. The results show that the proposed combined cycle has lower electricity cost and higher exergy efficiency compared to the basic system, and outperforms previous systems based on supercritical CO2 and Rankine cycles.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Wenbiao Tian, Huan Xi
Summary: The study evaluates five PTES systems and finds that the system combining basic vapor compression heat pump cycle with basic organic Rankine cycle shows the best performance in terms of economic performance, round-trip efficiency, and maximum exergy efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Eero Vartiainen, Christian Breyer, David Moser, Eduardo Roman Medina, Chiara Busto, Gaetan Masson, Elina Bosch, Arnulf Jager-Waldau
Summary: Green hydrogen will be a crucial component of the future 100% sustainable energy and industrial system, with a certain proportion of solar and wind electricity being used for hydrogen production through water electrolysis. It is anticipated that by 2030 and 2050, electrolyzer capital expenditure and hydrogen costs will significantly decrease, particularly with the continuous decline in solar PV costs.
Article
Green & Sustainable Science & Technology
Rong Wang, Sandra Hasanefendic, Elizabeth von Hauff, Bart Bossink
Summary: The price of photovoltaics (PV) has been decreasing, making it cheaper than conventional electricity sources. This study critically evaluates the grid parity of PV in China and proposes a more accurate assessment method. The findings suggest that grid parity for PV in China will be achieved between 2020 and 2032.
Article
Thermodynamics
Jintao Niu, Jiansheng Wang, Xueling Liu
Summary: The present work proposes subcritical double-pressure ORC combined with flash cycle and ejector (S-EFDPORC) and transcritical ORC combined with flash cycle and ejector (T-EFDPORC) to increase the net output power of the Organic Rankine Cycle (ORC). Thermodynamic and economic analyses are conducted on five proposed systems, with net output power and levelized energy cost (LEC) as optimization objectives. Multi-objective optimization methods are used to compare the performance. The results show that S-EFDPORC and T-EFDPORC can effectively improve net output power, but result in worse economic performance of the system.
Article
Chemistry, Physical
Reuben Joseph Soja, Muhammad Bello Gusau, Usman Ismaila, Nuraddeen Nasiru Garba
Summary: This study aims to estimate the cost of nuclear hydrogen production and compare the results with similar studies using the HEEP program. Six existing light water reactors were used to evaluate the levelized cost of nuclear hydrogen production, and the results showed that different reactor technologies and production methods impact the final price of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Zheng Miao, Zhanbo Wang, Petar Sabev Varbanov, Jirf Jaromfr Klemes, Jinliang Xu
Summary: The trans-critical organic Rankine cycle (TCORC) achieves better thermal match in the heating process and the cooling process by using zeotropic mixtures as working fluids. The key factor influencing the system performance is the critical temperature of the mixture. Mixtures with proper condensation temperature glide can further improve the system performance. Thermo-economic analysis shows that the selected mixtures can also provide better thermo-economic performance.
Article
Green & Sustainable Science & Technology
Huaitao Zhu, Gongnan Xie, Han Yuan, Sandro Nizetic
Summary: This paper investigates the performance optimization of the supercritical carbon dioxide Brayton combined cycles, proposing a new system performance parameter and comparing different working fluids for the bottom cycle. The study finds that the S-CO2/ORC combined cycle with R32 and ammonia as the working fluids achieves the best performance, and superheating the organic working fluids can improve the cycle's isothermal efficiency.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Ahmed Khouya
Summary: This study presents a novel integration of a mechanical vapor compression driven multi-effect distillation (MED) desalination plant powered by a concentrated photovoltaic thermal system and an organic Rankine cycle. The results show that the parallel cross-feed configuration is the best choice, leading to improved performance compared to other MED technologies integrated with renewable energy sources.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Yuan Zhang, Tianyang Liang, Ke Yang
Summary: This paper proposes an integrated energy storage system consisting of Compressed Carbon dioxide Energy Storage (CCES) and Organic Rankine Cycle (ORC) and evaluates the system performance using four criteria. The results show the influence of key parameters on system performance and recommend the optimal parameters through multi-objective optimization.
Article
Green & Sustainable Science & Technology
Zhanying Zheng, Xiaoqiang Hong, Wei Wu, Yong-qiang Feng, Michael K. H. Leung
Summary: The presence of moisture in industrial exhaust gases can significantly increase the net power output of thermodynamic cycles used for electricity generation. In particular, the dual-pressure organic Rankine cycle shows the most convincing performance enhancement when compared to a simple organic Rankine cycle.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Yue Yao, Jin-Hua Xu, De-Qiang Sun
Summary: Renewable energy has become a more economic source of electricity globally, with capacity factors, installed costs, and learning effects being key drivers of cost reduction. Wind and solar costs are decreasing rapidly, while geothermal, hydropower, and bioenergy costs are more heavily influenced by site-specific characteristics and natural resource diversity.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Wan Lv, Changnian Chen, Haoran Zhao, Chunyang Liu, Jitian Han
Summary: An innovative cascaded CCHP system based on transcritical carbon dioxide cycle and organic Rankine cycle is proposed in this study to utilize the cold energy of liquefied natural gas and the exhaust heat from the gas turbine. The system demonstrates significant improvements in energy utilization efficiency and net electrical efficiency, and sensitivity analysis of parameters is conducted.
APPLIED THERMAL ENGINEERING
(2024)
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.