Solar Energy最新文献_第5页

Machine learning, theoretical exploration and device simulation of Cs2NaXCl6 (X = Bi, In, Sb, Sc) double halide perovskites with spatial applications

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113199

Changcheng Chen , Yali Tuo , Zhengjun Wang , Minghong Sun , Yuxi Du , Zhao Han , Xiongfei Yun , Shaohang Shi , Jiangzhou Xie , Shuli Gao , Wen Chen , Chao Dong , Xiaoning Guan , Gang Liu , Pengfei Lu

With the growing interest in cosmic spatial, perovskite solar cells are not only for terrestrial applications, but are also attractive as a space technology. However, the extraterrestrial environment requires certain properties of the materials. In this paper, we screened suitable double perovskite models by machine modeling and used first-principles calculations to analyze the structural, mechanical, optical, and electronic properties. Geometrical parameters demonstrate that Cs₂NaBiCl₆, Cs₂NaInCl₆, Cs₂NaSbCl₆ and Cs₂NaScCl₆ all have stable structures, and molecular dynamics simulation characterizes the thermodynamic stability. Mechanical results show that Cs₂NaBiCl₆, Cs₂NaInCl₆, Cs₂NaSbCl₆ and Cs₂NaScCl₆ have bulk modulus higher than 16 GPa, which is resistant to deformation. Optical property calculations display good absorption in the spatial UV band range. Electronic properties explore the elemental orbital contributions leading to the band gaps. Simulations of solar cells in the AM0 environment show that the conversion efficiency is not low in the space environment and improves with increasing Jsc, making it promising for space applications. The superior flexibility of dual perovskites has potential as a device in space environments, and promotes the development of functional devices, especially for applications that require high stability.

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引用次数: 0

Building Integrated Solar Energy (BISE)

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2025.113265

Yanjun Dai (Managing Guest Editor), Yanping Yuan, Zhiqiang Zhai, Xudong Zhao, Teng Jia

引用次数: 0

Neural-network-driven dynamic simulation of parabolic trough solar fields for improved CSP plant operation

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113203

Matthew J. Tuman, Michael J. Wagner

Concentrating Solar Power plants face challenges in achieving and sustaining high performance levels partially due to complexities in plant operations. This study addresses these challenges by developing a computationally efficient, high-fidelity parabolic trough solar field model capable of emulating CSP plant dynamics for use as an operator training simulator and as a tool for optimizing operation strategies. Leveraging a neural network methodology, the model efficiently computes heat absorbed by heat transfer fluid in a solar field with various receiver conditions. The trained neural network model achieves heat absorption error of 0.3% compared to a detailed model while increasing the simulation speed by a factor of 100. The solar field model is validated with data from the operational Solana Solar Generating Station near Gila Bend, AZ (US), and computes temperatures resulting in a mean absolute error of

2.2 [° C]

over an entire day including start up and shut down. The model is further validated with respect to net optical efficiency that accounts for time-varying collector defocusing. Lastly, this work concludes with case studies that demonstrate the model’s capabilities both as the engine for a training simulator and as an tool for optimizing solar field control strategies.

{"title":"Neural-network-driven dynamic simulation of parabolic trough solar fields for improved CSP plant operation","authors":"Matthew J. Tuman, Michael J. Wagner","doi":"10.1016/j.solener.2024.113203","DOIUrl":"10.1016/j.solener.2024.113203","url":null,"abstract":"<div><div>Concentrating Solar Power plants face challenges in achieving and sustaining high performance levels partially due to complexities in plant operations. This study addresses these challenges by developing a computationally efficient, high-fidelity parabolic trough solar field model capable of emulating CSP plant dynamics for use as an operator training simulator and as a tool for optimizing operation strategies. Leveraging a neural network methodology, the model efficiently computes heat absorbed by heat transfer fluid in a solar field with various receiver conditions. The trained neural network model achieves heat absorption error of 0.3% compared to a detailed model while increasing the simulation speed by a factor of 100. The solar field model is validated with data from the operational Solana Solar Generating Station near Gila Bend, AZ (US), and computes temperatures resulting in a mean absolute error of <span><math><mrow><mn>2</mn><mo>.</mo><mn>2</mn><mspace></mspace><mrow><mo>[</mo><mo>°</mo><mi>C</mi><mo>]</mo></mrow></mrow></math></span> over an entire day including start up and shut down. The model is further validated with respect to net optical efficiency that accounts for time-varying collector defocusing. Lastly, this work concludes with case studies that demonstrate the model’s capabilities both as the engine for a training simulator and as an tool for optimizing solar field control strategies.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"287 ","pages":"Article 113203"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance enhancement of flat plate cooking unit using novel hook turbulators for indirect solar cooking applications: Numerical and experimental assessment with enviroeconomic analyses

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2025.113247

B.G. Venkateshwaran , G. Kumaresan , R. Santosh , R. Velraj

Emphasized design modification in cooking units enhanced the performance of solar cooking systems immensely. Motivated by the designs in the literature, an attempt has been made to enhance the performance of a solar-based flat plate cooking unit (FPCU) by incorporating novel hook turbulators. Initially, the thermal behavior of the designed FPCU with and without turbulators was numerically studied using computational fluid dynamics (CFD) analysis. Further, the numerical results were validated by conducting an experimental investigation on the preparation of dosa (Indian rice pancakes). From the CFD results, it was identified that the turbulator inclusion induced uniform temperature distribution and increased core flow velocity, which enhanced the total heat transfer rate by 6.5 % with the penalty of ∼1.64 % increased pressure drop. The experimental results identified that the turbulator inclusion reduced cooking duration by ∼14 % and improved the heat transfer rate, cooking unit and overall system efficiencies by 6.2 %, 2.16 % and 1.55 % respectively, compared to without turbulator configuration. On validation, the numerical and experimental results of FPCU with and without turbulators aligned well with a maximum deviation of ∼6 % for the cooking portion heat transfer coefficient of 100 Wm⁻²K⁻¹. The economic analysis reveals that compared to without turbulator FPCU, the levelized cost of cooking a meal (LCCM) (0.127 $/meal) and levelized cost of cooking energy (LCOE) (0.326 $/kWh) of turbulator-assisted FPCU were reduced by 13.38 % and 5.8 % respectively. The environmental analysis shows that the turbulator-integrated FPCU can mitigate 503.22 kg and 420.17 kg of CO₂/year compared to LPG and electric stoves respectively.

{"title":"Performance enhancement of flat plate cooking unit using novel hook turbulators for indirect solar cooking applications: Numerical and experimental assessment with enviroeconomic analyses","authors":"B.G. Venkateshwaran , G. Kumaresan , R. Santosh , R. Velraj","doi":"10.1016/j.solener.2025.113247","DOIUrl":"10.1016/j.solener.2025.113247","url":null,"abstract":"<div><div>Emphasized design modification in cooking units enhanced the performance of solar cooking systems immensely. Motivated by the designs in the literature, an attempt has been made to enhance the performance of a solar-based flat plate cooking unit (FPCU) by incorporating novel hook turbulators. Initially, the thermal behavior of the designed FPCU with and without turbulators was numerically studied using computational fluid dynamics (CFD) analysis. Further, the numerical results were validated by conducting an experimental investigation on the preparation of dosa (Indian rice pancakes). From the CFD results, it was identified that the turbulator inclusion induced uniform temperature distribution and increased core flow velocity, which enhanced the total heat transfer rate by 6.5 % with the penalty of ∼1.64 % increased pressure drop. The experimental results identified that the turbulator inclusion reduced cooking duration by ∼14 % and improved the heat transfer rate, cooking unit and overall system efficiencies by 6.2 %, 2.16 % and 1.55 % respectively, compared to without turbulator configuration. On validation, the numerical and experimental results of FPCU with and without turbulators aligned well with a maximum deviation of ∼6 % for the cooking portion heat transfer coefficient of 100 Wm<sup>−2</sup>K<sup>−1</sup>. The economic analysis reveals that compared to without turbulator FPCU, the levelized cost of cooking a meal (LCCM) (0.127 $/meal) and levelized cost of cooking energy (LCOE) (0.326 $/kWh) of turbulator-assisted FPCU were reduced by 13.38 % and 5.8 % respectively. The environmental analysis shows that the turbulator-integrated FPCU can mitigate 503.22 kg and 420.17 kg of CO<sub>2</sub>/year compared to LPG and electric stoves respectively.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"287 ","pages":"Article 113247"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal emittance measurement of low-emissive materials for enhanced conversion efficiency in vacuum-based solar thermal applications

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113230

Eliana Gaudino , Umar Farooq , Antonio Caldarelli , Paolo Strazzullo , Daniela De Luca , Emiliano Di Gennaro , Roberto Russo , Marilena Musto

In the quest for more efficient solar thermal systems, accurately determining the thermal emittance of low-emissive materials is crucial in determining the power losses. This paper describes the calorimetric method designed to precisely measure the thermal emittance of Selective Solar Absorbers (SSAs) to be used in High Vacuum Flat Plate Collectors (HVFPCs). The method’s capability is demonstrated through the successful correction of thermal emittance values for copper samples of varying sizes, including dimensions down to 49 cm2. Results highlight the method’s potential to significantly reduce measurement errors associated with small-size and/or low-emittance samples, providing a path forward to improve the design and efficiency of SSAs. This research marks a significant step in advancing solar thermal technology by enabling emittance measurements with a precision better than 0.003, which is essential for the development of high-performance solar thermal absorbers. The method has also been applied to correct the thermal emittance value of SSA measured in previous measurement campaigns, and it allows a better estimation of the SSA efficiency conversion curve.

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引用次数: 0

Conservation of Moroccan apricot varieties using solar energy

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113217

Jeddi Mohamed Rida , Bahammou Younes , Ouaabou Rachida , Hssaini Lahcen , Idlimam Ali , Boukendil Mohammed , EL Moutaouakil Lahcen

The agricultural industry is a vital sector in many countries, significantly contributing to employment through both direct and indirect links with food processing and distribution. This research is a sustainable and eco-friendly solution, to conserve two apricot varieties, Carmen and Aurora, in Morocco’s agri-food industry. Utilizing an indirect convective solar dryer under various aero-thermal conditions, the study demonstrates a notable decrease in moisture content for Carmen and Aurora apricots, from initial values of 86.38 % and 82.75 % respectively, to 26.78 ± 3 % (wet.basis). By examining the drying kinetics of apricot slices, the research establishes diffusion coefficients ranging from 4.65 10^-10 to 24.40 10^-10 m²/s for Carmen and from 3.24 10^-10 to 14.16 10^-10 m²/s for Aurora, with the coefficients varying as temperature increases. The Arrhenius equation, indicating an activation energy of 5434.87 kJ/kg, effectively describes the temperature dependency of the diffusion coefficient. Notably, the conductive drying kinetics of apricot slices were found to be best described by the Midilli-Kucuk model. The overall energy consumption exhibited a downward trend as temperatures increased and an upward trend with higher airflow rates. Additionally, the findings showed that higher air temperatures led to better energy efficiency. To assess the performance of the solar dryer being studied, an exergy analysis was conducted. The exergy efficiency of the convective dryer varied between 22.24 % and 54.12 % for Aurora, and between 31.6 % and 57.32 % for Carmen. This innovative approach highlights the potential of green energy in enhancing agricultural practices and product preservation.

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引用次数: 0

Toward high-performance carbon-based perovskite solar cells

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2025.113261

Alaa A. Sery , Alaa E. Abd El-Samad , Radwa S. Mostafa , Hager H. Zeenelabden , Ahmed Mourtada Elseman , Sajid Sajid , Mohamed M. Rashad , Mostafa El-Aasser

Owing to massive global energy claims and up-to-date environmental issues, the necessity to realize renewable, abundant, efficient, and low-cost energy sources is urgently required. Solar energy is a favorable source that is expected to fulfill the future energy demand all over the world. Organic/inorganic hybrid perovskites are good solar harvesting materials that recently gained intensive attention due to their high absorption coefficient, broadly tunable bandgap, incredible charge mobility, long charge diffusion lengths, and long carrier lifetime. Interestingly, over the past ten years, perovskite solar cells (PSCs) have demonstrated striking competitive power conversion efficiency (PCE) of over 25%. Despite its rapid progress, a few crucial challenges prevent this ground-breaking technology—which can be summed up as long-lasting stability—from being commercialized. A range of carbon-based materials (CBMs) such as fullerenes, graphene, graphene derivatives, carbon dots, graphene quantum dots, and carbon nanotubes are used extensively in PSCs to improve their performance, especially stability, because they are inexpensive, easily processed, stable, and have unique optoelectronic properties. In this regard, the most recent developments regarding the use of CBMs as interface layers, electron transport layers (ETLs), hole transport layers (HTLs), additives to perovskite layers, as well as counter electrodes are examined in detail. Furthermore, the improved stability as a result of using CBMs in PSCs is emphasized. Last but not least, we address future perspectives on carbon-based PSCs, focusing on existing challenges and potential solutions.

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引用次数: 0

A numerical investigation on improving the thermal efficiency of PV panels through integration with solar water collectors

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2025.113259

Moataz M. Abdel-Aziz , Abd Elnaby Kabeel , Abdelkrim Khelifa , Mohammed El Hadi Attia , Mahmoud Bady

This research introduces a unique approach to enhancing the thermal efficiency of photovoltaic (PV) panels by integrating them with solar water collectors. The study employs commercial computational fluid dynamics (CFD) analysis to assess performance and compares two distinct photovoltaic/thermal (PV/T) configurations. Configuration 1, a standard PV unit measuring 0.54 m in width and 1.20 m in length, is a reference. Configuration 2 introduces a modified PV system that maintains the exact PV panel dimensions but incorporates a solar water collector of the same size. The solar water collector is designed to facilitate efficient heat transfer, with water circulating through the system at a controlled mass flow rate of 0.01 kg/s, driven by a pump. The analysis reveals that Configuration 2 achieves a significant 56.48 % increase in thermal efficiency compared to the reference Configuration 1. This substantial improvement is attributed to the enhanced heat dissipation provided by the absorber plate and the integrated solar water collector, which effectively reduces the operating temperature of the PV panels. Additionally, the study finds a modest but meaningful increase of 2.13 % in electrical efficiency in Configuration 2, further validating the benefits of the integrated system. Moreover, the average temperature of the PV panels is reduced by approximately 1.08 %, indicating improved operational conditions that contribute to the overall efficiency gains. This work introduces a novel hybrid PV/T system integrating a full-sized PV panel with a solar water collector, achieving a thermal efficiency improvement and an electrical efficiency increase. The system demonstrates enhanced heat dissipation, reduced PV panel temperature, and practical potential for scalable renewable energy applications. The results offer insightful information for creating PV/T systems that are more efficient, pointing to a viable path for further study and real-world implementations in the renewable energy industry.

{"title":"A numerical investigation on improving the thermal efficiency of PV panels through integration with solar water collectors","authors":"Moataz M. Abdel-Aziz , Abd Elnaby Kabeel , Abdelkrim Khelifa , Mohammed El Hadi Attia , Mahmoud Bady","doi":"10.1016/j.solener.2025.113259","DOIUrl":"10.1016/j.solener.2025.113259","url":null,"abstract":"<div><div>This research introduces a unique approach to enhancing the thermal efficiency of photovoltaic (PV) panels by integrating them with solar water collectors. The study employs commercial computational fluid dynamics (CFD) analysis to assess performance and compares two distinct photovoltaic/thermal (PV/T) configurations. Configuration 1, a standard PV unit measuring 0.54 m in width and 1.20 m in length, is a reference. Configuration 2 introduces a modified PV system that maintains the exact PV panel dimensions but incorporates a solar water collector of the same size. The solar water collector is designed to facilitate efficient heat transfer, with water circulating through the system at a controlled mass flow rate of 0.01 kg/s, driven by a pump. The analysis reveals that Configuration 2 achieves a significant 56.48 % increase in thermal efficiency compared to the reference Configuration 1. This substantial improvement is attributed to the enhanced heat dissipation provided by the absorber plate and the integrated solar water collector, which effectively reduces the operating temperature of the PV panels. Additionally, the study finds a modest but meaningful increase of 2.13 % in electrical efficiency in Configuration 2, further validating the benefits of the integrated system. Moreover, the average temperature of the PV panels is reduced by approximately 1.08 %, indicating improved operational conditions that contribute to the overall efficiency gains. This work introduces a novel hybrid PV/T system integrating a full-sized PV panel with a solar water collector, achieving a thermal efficiency improvement and an electrical efficiency increase. The system demonstrates enhanced heat dissipation, reduced PV panel temperature, and practical potential for scalable renewable energy applications. The results offer insightful information for creating PV/T systems that are more efficient, pointing to a viable path for further study and real-world implementations in the renewable energy industry.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"287 ","pages":"Article 113259"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Japan’s local consumption of solar energy: The role of energy demand in residential and small-scale solar projects

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113175

Samuel Matthew G. Dumlao, Seiichi Ogata

Japan’s commitment to achieving net-zero emissions by 2050 includes a target for solar photovoltaic (PV) to generate 14%–16% of the nation’s electricity by 2030, as outlined in the Sixth Strategic Energy Plan. To support the potential contributions of ordinary citizens, this research analyzes the factors influencing the deployment of residential and small-scale solar PV systems in Japanese municipalities, providing local government units with data-driven insights to formulate strategies for expanding solar energy. A Random Forest Regression model assesses each factor’s impact on municipal solar PV capacity share. SHAP values highlight feature importance and visualize the most influential independent variables. Results indicate that local energy demand is the primary driver of solar PV installations. For residential systems, economic factors such as taxable income serve as secondary drivers, while high land values impede growth. In the case of small-scale installations, land availability becomes a critical limiting factor, particularly in regions with limited land, even when energy demand remains high. The study demonstrates that proactive local governments can overcome economic and land-use challenges through targeted subsidies, strategic partnerships, innovative use of public spaces, and strict enforcement of land-use regulations. By highlighting the significance of local energy demand and citizen involvement, this study offers valuable insights for policymakers to prioritize areas with lower energy demand and implement targeted supportive policies, thereby fostering a more balanced distribution of solar PV installations. Japan’s case may serve as a reference for optimizing solar PV deployment strategies globally, contributing to the broader discourse on small-scale renewable energy expansion.

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引用次数: 0

Key parameters influencing wind-induced aeroelastic responses of single-axis solar trackers in photovoltaic plants

IF 6 2区工程技术 Q2 ENERGY & FUELS

Solar Energy

Pub Date : 2025-02-01 DOI: 10.1016/j.solener.2024.113232

Giorgio Frontini, Filippo Calamelli, Sara Muggiasca, Tommaso Argentini

Single-axis solar trackers enhance energy production and cost-effectiveness in large-scale solar installations compared to fixed panels. However, their structural design must address unique challenges, particularly regarding wind resistance, due to reduced mechanical properties for cost savings.

This article examines several key parameters of solar plants and evaluates their influence on tracker response, emphasizing wind-induced aeroelastic effects. These parameters include the layout arrangement of solar plants and the inter-row spacing. Tracker position has been evaluated in a 4-rows by 2-column corner region of rectangular tracker plant, with two ground cover ratios of 0.38 and 0.25. Moreover, the effects of the operational parameters of individual trackers have also been monitored, considering working pitch angles in the range between

- 6 0^{\circ}

and

+ 6 0^{\circ}

and wind exposure angles of 0°, 15°, 30° and 45°. Structural properties were assumed to remain constant.

The research combines experimental wind tunnel tests with numerical dynamic simulations based on a finite element model, monitoring the internal stress state to assess performance.

Results show that large pitch angles (

> 4 5^{\circ}

) exhibit stable aeroelastic behavior, while small pitch angles, between

- 3 0^{\circ}

and

+ 3 0^{\circ}

, become unstable after reaching a certain velocity threshold. Among the monitored pitches, inclinations between 15° and 30° are the most critical in terms of internal response. The research confirms that trackers on the perimeter are the most stressed in the plants. The largest load cases occur with wind directions normal to the tracker axis. Finally, the analysis of the spacing between rows showed no significant effect on the response.

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引用次数: 0