Solar Energy最新文献_第4页

Research on residual heat prediction and energy management control of photovoltaic greenhouse based on data-driven method 基于数据驱动的光伏温室余热预测与能量管理控制研究

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-13 DOI: 10.1016/j.solener.2025.114046

Xiaoyan Zhou , Ming Li , Ying Zhang , Yunfeng Wang , Guoliang Li , Yi Zhang , Xiaokang Guan , Tianyu Xing

{"title":"Research on residual heat prediction and energy management control of photovoltaic greenhouse based on data-driven method","authors":"Xiaoyan Zhou , Ming Li , Ying Zhang , Yunfeng Wang , Guoliang Li , Yi Zhang , Xiaokang Guan , Tianyu Xing","doi":"10.1016/j.solener.2025.114046","DOIUrl":"10.1016/j.solener.2025.114046","url":null,"abstract":"<div><div>Ventilation-induced residual heat loss is a key factor affecting the energy utilization efficiency of greenhouses. The residual heat in photovoltaic greenhouses is influenced by multiple meteorological factors, such as temperature, humidity, wind speed, and solar radiation, which exhibit complex nonlinear relationships. Although traditional physics-based models perform well under specific conditions, they exhibit significant limitations in handling the nonlinear relationships among multiple parameters. With the rapid advancement of artificial intelligence, data-driven approaches have increasingly become effective tools for addressing such nonlinear problems. To address this challenge, this study proposes an innovative system that combines a PV-driven heat pump with waste heat recovery, integrated into a 24.5 m<sup>2</sup> PV greenhouse. A dynamic model between solar radiation, crops, and the heat recovery system was established to determine the greenhouse’s temperature and estimate the actual heating and cooling demands of the crops. In addition, data-driven approaches, including MLP, CNN, and ResNet models, were used to predict the residual heat energy in the greenhouse at different time scales, and the energy migration characteristics of the heat recovery system under different working conditions were analyzed. The results indicate that as the time scale increases, the ResNet model consistently demonstrates superior predictive performance across different time scales, achieving <em>R</em><sup>2</sup> values ranging from 0.890 to 0.929. The proposed system improves the primary energy ratio by 27.0 % and the system coefficient of performance by 36.9 %, with an overall energy saving rate of 79 %. This study provides valuable insights for residual heat prediction and energy management in photovoltaic greenhouses.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114046"},"PeriodicalIF":6.0,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145325404","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

Preparation and properties of NH4Al(SO4)2·12H2O- CH3COONa·3H2O eutectic phase change materials and supercooling modification NH4Al(SO4)2·12H2O- CH3COONa·3H2O共晶相变材料的制备、性能及过冷改性

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-13 DOI: 10.1016/j.solener.2025.114041

Jiachen Li , Biao Hu , Hui Wang , Jinxin Yang , Chunwang Li , Xin Du

{"title":"Preparation and properties of NH4Al(SO4)2·12H2O- CH3COONa·3H2O eutectic phase change materials and supercooling modification","authors":"Jiachen Li , Biao Hu , Hui Wang , Jinxin Yang , Chunwang Li , Xin Du","doi":"10.1016/j.solener.2025.114041","DOIUrl":"10.1016/j.solener.2025.114041","url":null,"abstract":"<div><div>A eutectic hydrate salt phase change material composed of NH<sub>4</sub>Al(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O-CH<sub>3</sub>COONa·3H<sub>2</sub>O was prepared. The eutectic composition, determined experimentally to consist of 92.5 wt% NH<sub>4</sub>Al(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O and 7.5 wt% CH<sub>3</sub>COONa·3H<sub>2</sub>O, deviated significantly from predictions made by the Scholar’s equation, highlighting the need for optimization of theoretical prediction methods. The eutectic material exhibited promising thermal storage properties, but a significant supercooling degree of 12.98 K was observed. To mitigate this issue, 14 different nucleating agents were evaluated and five nucleating agents were identified as effective in reducing the supercooling degree to below 1 °C. Furthermore, the thermophysical properties of the eutectic phase change materials with five preferred nucleating agents, including phase change temperature, latent heat, volume expansion ratio and thermal storage density, were characterized using differential scanning calorimetry, T-history, and solid–liquid density testing. Among the five preferred nucleating agents, Nano Cu demonstrated the best performance, achieving a high thermal storage density of 223.45 kJ/kg and a minimal volume expansion ratio of 4.92 %. Future studies will focus on optimizing heat transfer characterization and integrating this material into renewable energy-based heating systems such as heat pumps, solar heating systems, and valley electric heating systems to achieve sustainable and efficient heating solutions.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114041"},"PeriodicalIF":6.0,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145325366","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

Evaluating site suitability for ground-mounted PV-pumped storage systems via G1–entropy weighting and GIS 基于g1 -熵加权和GIS的地面光伏抽水蓄能系统选址适宜性评价

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-13 DOI: 10.1016/j.solener.2025.114050

Shaonan Sun , Qiongfang Lin , Chunlu Liu , Ailing Wang

{"title":"Evaluating site suitability for ground-mounted PV-pumped storage systems via G1–entropy weighting and GIS","authors":"Shaonan Sun , Qiongfang Lin , Chunlu Liu , Ailing Wang","doi":"10.1016/j.solener.2025.114050","DOIUrl":"10.1016/j.solener.2025.114050","url":null,"abstract":"<div><div>Site selection for ground-mounted photovoltaic–pumped storage systems (GMPV-PSS), a key early step, is of vital importance for energy transition. Previous studies have evaluated site suitability from a single perspective, lacking evaluation based on an overall perspective on GMPV-PSS. This study introduces a novel framework for identifying optimal sites for GMPV-PSS. Through a literature review and the Delphi method, an evaluation indicator system was constructed, the subjective weights and objective weights of the indicators were respectively determined using the G1 order–relation analysis method and the entropy-weight method, and the indicators’ comprehensive weights were generated. Furthermore, weighted overlay and visualization analyses were conducted using geographic information systems. An empirical study identified that the most suitable sites for GMPV-PSS in China are Xinjiang, the northwestern part of Gansu Province, and certain regions in the west of Qinghai Province. Most areas of Inner Mongolia and the northern part of Shanxi Province, as well as the northern marginal zone of Tibet, also have relatively high site suitability. The developed assessment method provides a novel perspective on site-suitability assessment for GMPV-PSS and the empirical findings offer valuable insights for formulating effective infrastructure planning strategies.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114050"},"PeriodicalIF":6.0,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145325417","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

Performance optimization of InGaN nanowire photocathode by Cs-Li-NF3 activation ratio Cs-Li-NF3活化比优化InGaN纳米线光电阴极性能

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-10 DOI: 10.1016/j.solener.2025.114053

Zhihao Cao , Lei Liu , Zhidong Wang , Jian Tian , Xingyue Zhangyang , Hongchang Cheng , Xin Guo

{"title":"Performance optimization of InGaN nanowire photocathode by Cs-Li-NF3 activation ratio","authors":"Zhihao Cao , Lei Liu , Zhidong Wang , Jian Tian , Xingyue Zhangyang , Hongchang Cheng , Xin Guo","doi":"10.1016/j.solener.2025.114053","DOIUrl":"10.1016/j.solener.2025.114053","url":null,"abstract":"<div><div>In order to investigate the influence of different activating substances on photoemission performance of InGaN nanowires, we conduct theoretical studies on InGaN nanowires adsorbed by Cs-Li, Cs-NF<sub>3</sub> and Cs-Li-NF<sub>3</sub> using first-principles methods. Adsorption energies indicate that all structures are stable. However, excessive Cs atoms will jeopardize the stability of InGaN nanowires. When there are 3 Cs atoms on surface of InGaN nanowire, the three adsorption types of InGaN nanowires all show better electron emission performance. Among them, InGaN nanowires adsorbed by 3Cs-Li-NF<sub>3</sub> have relatively small work function and bandgap. We further explain the reason for high stability of InGaN nanowires adsorbed by 3Cs-Li-NF<sub>3</sub> using electron transfer and surface distance. In addition, 3Cs-Li-NF<sub>3</sub> adsorbed InGaN nanowires have very low reflectivity and high absorption coefficient in visible and near-infrared bands, so they have excellent optical absorption characteristics. Therefore, InGaN nanowire adsorbed by 3Cs-Li-NF<sub>3</sub> has the best photoemission performance theoretically. This study will provide possible ways to improve performance of InGaN nanowire photocathode.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114053"},"PeriodicalIF":6.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263625","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

Performance analysis of photovoltaic panels with dual-axis tracking and passive cooling using fins and radiative paint 采用翅片和辐射涂料的双轴跟踪和被动冷却光伏板的性能分析

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-10 DOI: 10.1016/j.solener.2025.114047

Kamaruzzaman Sopian , Kehinde Temitope Alao , Xu Feng Gan , Jing Ee Yit , Taiwo Onaopemipo Alao , Hussein A Kazem , Sakhr Mohammed Sultan Al-Shaibani

{"title":"Performance analysis of photovoltaic panels with dual-axis tracking and passive cooling using fins and radiative paint","authors":"Kamaruzzaman Sopian , Kehinde Temitope Alao , Xu Feng Gan , Jing Ee Yit , Taiwo Onaopemipo Alao , Hussein A Kazem , Sakhr Mohammed Sultan Al-Shaibani","doi":"10.1016/j.solener.2025.114047","DOIUrl":"10.1016/j.solener.2025.114047","url":null,"abstract":"<div><div>High operating temperatures significantly reduce photovoltaic (PV) system efficiency, particularly in tropical climates. While passive cooling and solar tracking systems have independently shown promise, their combined application has been rarely explored in real-world conditions. This study introduces a novel hybrid PV system integrating dual-axis solar tracking with two passive cooling enhancements: radiative paint and porous copper metal foam fins. Five configurations (T1 to T5) were experimentally evaluated outdoors under irradiance levels ranging from 110.0 to 739.4 W/m<sup>2</sup>. Results showed that each enhancement yielded measurable gains. At peak irradiance, T1 (reference) achieved an efficiency of 12.13 %, T2 (tracking only) improved to 12.74 %, T3 (with aluminum fins) reached 13.34 %, and T4 (with aluminum fins and radiative paint) attained 13.49 %. The T5 configuration outperformed all others with an efficiency of 14.50 %, representing a 19.58 % relative gain over T1 and the lowest surface temperature of 50.0 °C. Although analytical modeling predicted lower heat dissipation for T5 compared to T3, experimental results demonstrated superior thermal regulation by T5 due to enhanced convective turbulence and radiative surface area. This hybrid system delivered improved efficiency without external energy input, offering a scalable and low-maintenance solution for PV applications in hot climates. The findings provide new insights into the design of thermally stable PV systems and underscore the limitations of simplified thermal models in capturing porous cooling behavior.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114047"},"PeriodicalIF":6.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263566","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

Solar photovoltaic hybrid energy modelling with fixed and TOU tariffs for decarbonization in unreliable grids 在不可靠电网中采用固定电价和分时电价进行脱碳的太阳能光伏混合能源模型

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-10 DOI: 10.1016/j.solener.2025.114051

Chibueze D. Ukwuoma , Dongsheng Cai , Chiagoziem C. Ukwuoma , Chinedu I. Otuka , Chidera O. Ukwuoma , Sithara P. Menikpura , Olusola Bamisile , Qi Huang

{"title":"Solar photovoltaic hybrid energy modelling with fixed and TOU tariffs for decarbonization in unreliable grids","authors":"Chibueze D. Ukwuoma , Dongsheng Cai , Chiagoziem C. Ukwuoma , Chinedu I. Otuka , Chidera O. Ukwuoma , Sithara P. Menikpura , Olusola Bamisile , Qi Huang","doi":"10.1016/j.solener.2025.114051","DOIUrl":"10.1016/j.solener.2025.114051","url":null,"abstract":"<div><div>Tackling decarbonization in regions with unreliable grids and no net-metering is hindered by tariff structures that discourage renewable integration. This study introduces a novel Outage-aware simulation framework analyzing Solar PV-Battery-Diesel hybrid system for commercial facilities under fixed and dynamic Time-of-Use (TOU) tariffs with a stringent CO<sub>2</sub> emissions cap, attaching different Grid supply schedules under each fixed tariff represented in Bands reflecting lower price for less reliable service common in outage prone regions, addressing a critical gap in prior studies assuming constant grid access and no emission limit. Through techno-economic optimization using HOMER Grid with real commercial load data (133,360 kWh/yr), we demonstrate that TOU pricing is decisively superior. It achieves the lowest Net Present Cost of $375,557, Levelized Cost of Energy of $0.218/kWh, and a 61% reduction in emissions, primarily by enabling intelligent load shifting to off-peak periods. Sensitivity analysis across Diverse climates/GHI (Niamey, La Paz, Kathmandu, & Kampala) confirms TOU’s consistent outperformance over fixed tariffs, with NPC reductions of 2.6–3.4% and LCOE reductions of 2.7–4.7%, showing that the economic and environmental superiority of TOU pricing is robust and consistent, regardless of solar irradiance variations or local climate. This finding underscores that policy-driven tariff reform is a more decisive lever for decarbonization when meeting blackout survivability and saving cost than location-specific solar potential. Excess generation supports applications like electric vehicle charging, offering a replicable, globally relevant framework for achieving resilient, low-cost, and low-carbon Solar PV Hybrid systems in outage-prone regions worldwide, offering vital insights for policymakers and planners.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114051"},"PeriodicalIF":6.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263619","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

6-hour prediction of photovoltaic power using effective cloud fraction from GK2A imagery over South Korean power plants 利用GK2A图像的有效云分数对韩国发电厂的6小时光伏发电进行预测

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-10 DOI: 10.1016/j.solener.2025.114023

JungHae Heur , Yong-Sang Choi , Hwayon Choi , Yoon-Kyoung Lee , Jin Hur , Hyunsu Kim , Jae In Song

{"title":"6-hour prediction of photovoltaic power using effective cloud fraction from GK2A imagery over South Korean power plants","authors":"JungHae Heur , Yong-Sang Choi , Hwayon Choi , Yoon-Kyoung Lee , Jin Hur , Hyunsu Kim , Jae In Song","doi":"10.1016/j.solener.2025.114023","DOIUrl":"10.1016/j.solener.2025.114023","url":null,"abstract":"<div><div>Accurate prediction of photovoltaic (PV) power generation is becoming increasingly critical in response to climate change and the growing demand for renewable energy. This study introduces a hybrid model that improves short-term PV power prediction for distributed PV plants across South Korea by integrating satellite-based cloud motion vectors (CMV) with multiple linear regression (MLR) techniques. To quantify the impact of cloud, the effective cloud fraction (ECF) is applied to improve the correlation with PV power. Cloud movements up to six hours ahead are predicted using a convolutional neural network (CNN) designed for optical flow estimation. Validation against actual data from 31 PV plants across 10 regions in South Korea shows that the 5-minute normalized mean absolute error (nMAE) remains below 2% across all lead times, including both daytime and nighttime periods. Although this study focuses on South Korea, the methodology —combining CMV and ECF—provides a generalizable framework that can be applied to diverse geographical and meteorological conditions. This approach demonstrates significant potential to enhance the accuracy of short-term PV power predictions, particularly in regions with limited ground-based observational infrastructure, by leveraging satellite data to assess the optical properties of clouds. This methodology enables power prediction across all locations where PV power plants are situated, thereby contributing to global grid stability and facilitating the integration of renewable energy sources.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114023"},"PeriodicalIF":6.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263564","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

An innovative thermo-hydraulic ultrafiltration process for solar application: experimental performances 一种创新的太阳能应用热液超滤工艺：实验性能

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-09 DOI: 10.1016/j.solener.2025.114043

Corentin Koninck , Driss Stitou , Vincent Goetz

{"title":"An innovative thermo-hydraulic ultrafiltration process for solar application: experimental performances","authors":"Corentin Koninck , Driss Stitou , Vincent Goetz","doi":"10.1016/j.solener.2025.114043","DOIUrl":"10.1016/j.solener.2025.114043","url":null,"abstract":"<div><div>Membrane ultrafiltration (UF) is an effective solution for separating pathogenic micro-organisms (bacteria, viruses and protozoa) from surface water. The pumping and pressurization of the water to be treated, necessary for ultrafiltration, are generated by a thermal energy input simulating the operation of a flat-plate solar collector. The process consisted of a modified organic Rankine cycle (ORC-like), two bladder tanks, a hydraulic complex with two double-acting cylinders and a UF membrane module. Experiments are conducted under controlled conditions with a hot thermal source fluctuating between 40 and 60 °C, while the ORC cold source varied between 20 and 40 °C. Energy variations typical of a solar day were reproduced under controlled conditions. Specific thermal energy consumption (SEC<sub>th</sub>) was measured, with values ranging from 3.5 to 6.5 kWh<sub>th</sub>·m<sup>−3</sup>. A dynamic numerical model was developed, based on enthalpy, heat and mass balances, the membrane transfers law and experimental correlations. After validation of the model, with an average deviation of 5 % on key process flows and pressures, a solar collector was integrated to simulate the performance of a solar thermal ultrafiltration process. For operating conditions in September in the south of France, a SEC<sub>sol</sub> of between 7.7 and 8 kWh<sub>sol</sub>·m<sup>−3</sup> was estimated, in sunny and cloudy days.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114043"},"PeriodicalIF":6.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263617","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

A new form of solar photovoltaic-photothermal cascade conversion with multistage concentrating-spectrum splitting: thermodynamic discussion 一种新形式的太阳能光电-光热级联转换多级集中-光谱分裂：热力学讨论

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-08 DOI: 10.1016/j.solener.2025.114025

Shiquan Shan, Jialu Tian, Kefa Cen

{"title":"A new form of solar photovoltaic-photothermal cascade conversion with multistage concentrating-spectrum splitting: thermodynamic discussion","authors":"Shiquan Shan, Jialu Tian, Kefa Cen","doi":"10.1016/j.solener.2025.114025","DOIUrl":"10.1016/j.solener.2025.114025","url":null,"abstract":"<div><div>This study proposes a multi-stage concentrating and spectrum splitting strategy for full-spectrum solar energy photovoltaic–photothermal (PV–PT) coupling utilization. A thermophysical model is established to investigate the effect of concentration ratio on the photothermal conversion of spectrum beam radiation. The effectiveness of concentration ratio on improving the output work potential of different spectra are analyzed. Moreover, a single-stage spectral splitting PV–PT system is optimized, and the impact of concentration variation on system performance is evaluated. Two multi-stage system configurations are investigated: one using the residual spectrum for direct high-temperature conversion of isothermal endothermic processes such as thermophotovoltaics; and the other applying residual spectrum for cascade heating to drive thermal power or thermal chemical cycles. The results indicate that the increasing concentration ratio is beneficial for enhancing the thermal conversion capacity of long-wavelength solar radiation. For effective PV–PT coupling conversion, the concentration ratio should be decoupled for different spectra. The multi-stage system reduces the required concentration ratio by over 40% compared to a single-stage system, enabling simpler and more cost-effective optical designs. In addition, the system efficiency is theoretically comparable to or exceeding that of the optimal single-stage system. The two-stage system with concentration ratio of 600 can achieve an efficiency of over 54%, even exceeding that of the single-stage system with concentration ratio of 1000 (53.87%). A three-stage non-isothermal endothermic coupling system can achieve efficiencies near 55%. This study provides practical guidance for the development of high-efficiency full-spectrum solar energy PV-PT coupling conversion systems.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114025"},"PeriodicalIF":6.0,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263565","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

Oxidation-Stable (Ti0.95M0.05)3(Si0.95Al0.05)C2 (M = Nb, Ta) ceramics for High-Temperature solar absorbers 氧化稳定陶瓷（Ti0.95M0.05）3(Si0.95Al0.05)C2 （M = Nb, Ta）高温太阳能吸收体

IF 6 2区工程技术

Solar Energy Pub Date : 2025-10-08 DOI: 10.1016/j.solener.2025.114052

Anqi Dai , Qikai Liu , Feiqiang Guan , Zhenggang Fang , Jian Yang , Chunhua Lu

{"title":"Oxidation-Stable (Ti0.95M0.05)3(Si0.95Al0.05)C2 (M = Nb, Ta) ceramics for High-Temperature solar absorbers","authors":"Anqi Dai , Qikai Liu , Feiqiang Guan , Zhenggang Fang , Jian Yang , Chunhua Lu","doi":"10.1016/j.solener.2025.114052","DOIUrl":"10.1016/j.solener.2025.114052","url":null,"abstract":"<div><div>High-temperature stability and spectral selectivity are essential for solar absorbers in concentrated solar power (CSP) systems operating under oxidative environments. In this work, novel (Ti<sub>0.95</sub>M<sub>0.05</sub>)<sub>3</sub>(Si<sub>0.95</sub>Al<sub>0.05</sub>)C<sub>2</sub> (M = Nb, Ta) ceramics were synthesized and evaluated for high-temperature solar absorbers. Nb- and Ta-doped samples, (Ti<sub>0.95</sub>Nb<sub>0.05</sub>)<sub>3</sub>(Si<sub>0.95</sub>Al<sub>0.05</sub>)C<sub>2</sub> (TNSC) and (Ti<sub>0.95</sub>Ta<sub>0.05</sub>)<sub>3</sub>(Si<sub>0.95</sub>Al<sub>0.05</sub>)C<sub>2</sub> (TTSC), exhibited high solar absorptance and low infrared emissivity at room temperature, with corresponding spectral selectivity of 3.0 and 2.8, respectively. At 750 °C, the doped samples maintained lower emittance values compared with that of the undoped counterpart, indicating improved thermal efficiency. After heat treatment in air at 800 °C for 9 h, TNSC and TTSC showed superior oxidation resistance, forming thinner oxide scales of 1.10 μm and 1.35 μm, respectively, compared to 1.52 μm for the undoped sample. Notably, TNSC retained a spectral selectivity of 2.0 after oxidation, demonstrating stable optical performance. This study reveals the potential of (Ti<sub>0.95</sub>M<sub>0.05</sub>)<sub>3</sub>(Si<sub>0.95</sub>Al<sub>0.05</sub>)C<sub>2</sub> (M = Nb, Ta) ceramics as durable, high-efficiency solar absorbers for long-term operation in CSP systems under high-temperature oxidative conditions.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"302 ","pages":"Article 114052"},"PeriodicalIF":6.0,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263624","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