Article
Chemistry, Physical
Dmitry Pashchenko
Summary: The paper examines an integrated solar combined cycle system (ISCCS) utilizing solar energy for steam methane reforming and compares its overall efficiency with that of a system utilizing solar energy for steam generation in a steam turbine cycle. Utilizing solar energy for steam methane reforming increases the overall efficiency by 3.5%. If water used for steam methane reforming is condensed from the exhaust gases, the overall efficiency of ISCCS increases by 6.2% to 8.9% compared to the system where solar energy is used for steam generation in a steam turbine cycle. Sankey diagrams based on the energy balance were compiled. Utilizing solar energy for steam methane reforming increases the power share of a gas turbine cycle, with two-thirds in the gas turbine cycle and one-third in the steam turbine cycle.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Bernardo Bergantini Botamede, Leandro Oliveira Salviano
Summary: This study investigates various layout alternatives for coupling a hybrid solar plant with an operational combined cycle powerplant in Brazil. The parabolic trough collector is examined as the focal point of the study, using oil and molten salt as working fluids. Through the development and validation of thermodynamic models, it was found that layouts utilizing solar energy for superheating saturated steam yielded the best performance, with a solar-to-electric conversion efficiency of up to 32.29%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yongqing Wang, Zhenning Guo, Lu Li, Fan Gao, Ke Wang, Bo An
Summary: Concentrating solar direct-steam-generation (DSG) technology is used to directly convert solar energy and water into power, contributing to a zero-carbon future. However, the intermittence of meteorological irradiation and instability of flow boiling pose challenges to the operation of the system. A transient coupled analysis model was established to investigate the relationship among irradiance, thermohydraulic and two-phase flow pattern in a parabolic trough collector direct-steam-generation (PTC-DSG) loop.
Article
Energy & Fuels
Ting Yang, Pan Zhang, Jian Zhang, Hao Ji, Wei Li
Summary: This paper proposes a novel coordination control method for an integrated solar combined cycle thermoelectric coupling system. The system's dynamic performance and robustness are improved by introducing an inertial power compensation scheme to address the mismatch in energy response speed. Furthermore, the control precision of the controller is enhanced through the use of an intelligent optimization algorithm.
Article
Green & Sustainable Science & Technology
Yaman Mohammad Ali Manaserh, Ahmad M. Abubaker, Adnan Darwish Ahmad, Ammar Bany Ata, Yousef S. H. Najjar, Nelson K. Akafuah
Summary: This study demonstrates that integrating a proposed solar power and thermal energy storage system with a conventional powerplant can significantly improve power output, efficiency, and reduce specific fuel consumption. By utilizing solar and storage systems, it is possible to meet future load demand and achieve a relatively short return of investment period.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Vinay Kumar Yadav, Jahar Sarkar, Pradyumna Ghosh
Summary: The study investigates an improved design of a solar-driven combined cooling and power system based on various perspectives. It compares the performance of this system with an individual cooling and power system. The results show that the novel cycle has higher performance index and overall exergy efficiency, lower total cost, and lower CO2 emission compared to the individual system. The study also finds that the performance is influenced by operating temperatures, component efficiencies, seasonal climate change, and cooling-to-power ratio.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Yan Cao, Mojtaba Bezaatpour, Hadi Ghaebi
Summary: The new design with innovative receiver, microporous metal foam, and magnetic nanofluid effectively addresses the heat loss issue in solar collectors, enhancing heat transfer efficiency and improving energy utilization.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Review
Thermodynamics
Miguel Sainz-Manas, Francoise Bataille, Cyril Caliot, Alexis Vossier, Gilles Flamant
Summary: Solar energy plays a crucial role in decarbonizing the energy and industrial sectors, with low and medium temperature solar thermal collectors providing a reliable solution for heat supply and decarbonization. Recent studies have shown the potential of nanoparticles in enhancing the optical properties of heat transfer fluids for direct absorption solar collectors. This paper presents the current state of Solar Heat for Industrial Processes (SHIP) installations and conventional surface collectors, and provides a critical literature review on nanofluid-based direct absorption solar collectors for both concentrating and non-concentrating collectors.
Article
Thermodynamics
Jiangjiang Wang, Haiyue Chen, Hongda Deng, Fuxiang Dong
Summary: This paper proposes a combined power and steam system that utilizes solar energy and natural gas. The system achieves high energy and exergy efficiency, with performance influenced by the coverage rate of photovoltaic modules and the load rate of the internal combustion engine.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Neelam Khandelwal, Meeta Sharma, Onkar Singh, Anoop Kumar Shukla
Summary: Existing conventional combined cycle power plants face challenges in power supply due to high natural gas prices and often have to remain idle or operate at part load. This study proposes an integrated solar combined cycle (ISCC) approach by combining linear Fresnel collector solar system and latent heat cascade storage system with a 328.10 MW combined cycle power plant in North India. The study analyses the performance of different integration configurations and explores the impact of using various heat transfer fluids on gas turbine operation. The results indicate that ISCC with molten salt as the heat transfer fluid achieves an efficiency of 50.87%, surpassing the performance with water by 1.51%.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Datong Gao, Jing Li, Xiao Ren, Tianxiang Hu, Gang Pei
Summary: This paper presents a high-efficient evacuated flat plate solar collector for process steam generation and proposes a dual-mode system to solve the seasonal mismatch problem of traditional solar thermal heating systems.
Article
Chemistry, Physical
N. Sarabchi, M. Yari, S. M. Seyed Mahmoudi
Summary: Two new configurations of cogeneration systems based on high-temperature proton exchange membrane fuel cell were proposed, one with a methanol steam reformer and a catalytic combustor, and the other with a parabolic trough solar collector and a heat storage tank. The first configuration showed higher overall exergy efficiency, while the second configuration exhibited better exergoeconomic performance and lower CO2 emissions under different operating conditions.
JOURNAL OF POWER SOURCES
(2021)
Article
Thermodynamics
Andres Z. Mendiburu, Justo J. Roberts, Leticia Jenisch Rodrigues, Sujit Kr Verma
Summary: The study aimed to develop explicit thermodynamic models for absorption refrigeration systems. The models included recent advances in calculating thermodynamic properties, parabolic trough solar collectors, and storage tanks. The models were validated with experimental results and showed excellent accuracy in terms of coefficient of performance (COP). A parametric study was conducted to determine feasible evaporation temperatures, and it was found that higher evaporator temperatures and lower condenser temperatures increased COP. A case study for a city in Brazil showed the system's suitability for a commercial office with a peak cooling load between 12 and 16 hours.
Article
Thermodynamics
Peyman Pourmoghadam, Mohammadsina Farighi, Fathollah Pourfayaz, Alibakhsh Kasaeian
Summary: This study conducted an annual transient analysis of the solar cascade organic Rankine cycle, evaluating the system from energy, exergy, and economic perspectives. Various PCMs and pairs of organic fluids were compared, with the results showing that closer PCM melting temperatures to the auxiliary heater setpoint temperature resulted in higher efficiencies. The economic evaluation revealed that the combination of R245fa/R500 with Dimethylol as the PCM thermal storage had the best economic performance.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Marwan Mokhtar, Christian Zahler, Robert Stieglitz
Summary: This paper presents a control strategy for solar direct steam generation (DSG) systems based on the combination of proportional-integral-derivative (PID) control theory and model-based feedforward control. Experimental data demonstrates its good performance in terms of stability and setpoint tracking.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(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.