Renewable Energy最新文献_第8页

Effect of pretreatment biomass by gas from polyvinyl chloride dehydrochlorination process on maize cob pyrolysis with integrated CO2 capture

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122666

Wojciech Jerzak, Izabela Kalemba-Rec, Aneta Magdziarz

{"title":"Effect of pretreatment biomass by gas from polyvinyl chloride dehydrochlorination process on maize cob pyrolysis with integrated CO2 capture","authors":"Wojciech Jerzak, Izabela Kalemba-Rec, Aneta Magdziarz","doi":"10.1016/j.renene.2025.122666","DOIUrl":"10.1016/j.renene.2025.122666","url":null,"abstract":"<div><div>This study investigates the effects of pretreatment of maize cob with hydrogen chloride gas obtained from polyvinyl chloride dehydrochlorination on pyrolysis yields and integrated CO₂ capture. The dehydrochlorination process was conducted at 320 °C, while the pyrolysis of the pretreated biomass was performed at 500 °C. Pretreatment significantly altered composition of biomass, reducing hemicellulose from 34.3 % to 3.7 %, increasing fixed carbon from 15.8 % to 20.3 %, and increasing the chlorine content from 0.27 % to 1.48 %. These changes influenced on the thermal decomposition characteristics of maize cob. During fast pyrolysis, the bio–oil yield increased by 17 %, from 32.9 % to 38.4 %, while gas production decreased from 38.7 % to 30.3 %, indicating a shift towards liquid biofuel production. Integration of calcium hydroxide in the pyrolysis reactor reduced CO₂ emissions by 87 %, from 56.5 % to 7.5 %, and captured chlorine from the pyrolysis gases, minimising harmful residues. Additionally, the use of calcium hydroxide facilitated the generation of hydrogen, increasing its content to 44.7 % in the gas phase. The bio–oil produced contained 0.8 % chlorine, demonstrating the effectiveness of in–situ chlorine capture. This approach, utilising hydrogen chloride derived from polyvinyl chloride waste, not only reduces environmental impact but also enhances the efficiency and sustainability of bio–oil production.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122666"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A novel linear Fresnel reflector concentrating photovoltaic/thermal system with enhanced optical performance

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122664

Jun Ma , Zhi-Yuan Zhou , Fang Liu , Wei-Cong Xu , Cheng-Long Wang , Li Zhao

{"title":"A novel linear Fresnel reflector concentrating photovoltaic/thermal system with enhanced optical performance","authors":"Jun Ma , Zhi-Yuan Zhou , Fang Liu , Wei-Cong Xu , Cheng-Long Wang , Li Zhao","doi":"10.1016/j.renene.2025.122664","DOIUrl":"10.1016/j.renene.2025.122664","url":null,"abstract":"<div><div>A novel linear Fresnel reflector concentrating photovoltaic/thermal system (LFR-CPV/T) is proposed, integrating an evacuated tube, a photovoltaic system (PV), and a compound parabolic concentrator as the receiver, along with an optimized PV design. The system’s optical performance is evaluated using Monte Carlo ray-tracing simulations. The results reveal that optical efficiency initially decreases and then increases with the PV width, while the non-uniformity index exhibits a similar trend. At an optimal PV width of 0.15 m, the system achieves maximum optical efficiency and enhanced flux uniformity on both the absorber tube and PV surfaces. The length of the PV and its surface flux density gradually decrease with increasing latitude. Compared to a typical LFR, the proposed LFR-CPV/T system with a 200-m-long collector achieves a 0.4 % improvement in optical efficiency and a 9.54 % reduction in the non-uniformity index on the absorber tube. Moreover, it delivers a significantly more uniform concentrated flux on the PV surface, with a non-uniformity index of just 6.25 %. These findings demonstrate that the proposed LFR-CPV/T system offers superior optical performance, providing a practical and efficient solution for integrating LFRs into CPV/T applications.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122664"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Policy support and technology development trajectory for renewable natural gas in the U.S.

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122669

Alvina Aui , Yu Wang

{"title":"Policy support and technology development trajectory for renewable natural gas in the U.S.","authors":"Alvina Aui , Yu Wang","doi":"10.1016/j.renene.2025.122669","DOIUrl":"10.1016/j.renene.2025.122669","url":null,"abstract":"<div><div>Renewable natural gas (RNG) is a clean alternative to fossil natural gas, which can be used as transportation fuel, among other applications. This study projects the development trajectory of RNG and evaluates its impacts on the future U.S. transportation market using a hybrid computable general equilibrium model. This analysis considers various factors and uncertainties affecting RNG production, such as technology development, market conditions, competition with other advanced biofuels, and national and state policies. In 2050, RNG production will grow to 2.7 billion gallons (10 billion liters), mostly from swine manure, under current policy provisions. This will lead to a reduction in greenhouse gas (GHG) emissions by 58.56 million metric tonne of CO<sub>2e</sub> in 2050. Analysis of different technology cases finds RNG from animal manure to be predominant, while RNG from corn stover and cellulosic ethanol are less competitive. A high mandatory target of 1 billion gallons will drive RNG production higher by 8–18 %, while an extended 2<sup>nd</sup>-generation biofuel production tax credit will mostly increase cellulosic ethanol production. The model also finds RNG production being affected by uncertainties in market conditions, such as GDP growth, fossil fuel prices, and oil and gas supply.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122669"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effect of intermittent operation on the thermal performance of a solar seasonal thermal storage heating system in a cold-region tunnel

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122667

Yao Zhang , Caichu Xia , Shuwei Zhou , Kangwen Xu , Shanpeng Cao , Wenbo Peng , Jianxin Zhang

{"title":"Effect of intermittent operation on the thermal performance of a solar seasonal thermal storage heating system in a cold-region tunnel","authors":"Yao Zhang , Caichu Xia , Shuwei Zhou , Kangwen Xu , Shanpeng Cao , Wenbo Peng , Jianxin Zhang","doi":"10.1016/j.renene.2025.122667","DOIUrl":"10.1016/j.renene.2025.122667","url":null,"abstract":"<div><div>The efficiency of tunnel heat exchangers often diminishes annually due to thermal imbalances, particularly in heating-dominated cold regions. For addressing frost damage in the entrance sections of cold-region tunnels, a novel and cost-effective solution: the Seasonal Solar Thermal Storage Heating (SSTSH) system, is proposed and applied in Tianshan Victory Tunnel in Xinjiang, China. Effect of intermittent operation on the thermal performance of the SSTSH system in Tianshan Victory Tunnel is investigated. Initially, field experiments are conducted to test the separate operation of thermal storage and extraction. Subsequently, a transient 3D numerical model is developed and validated by using experimental data to investigate the thermal performance of mixed operation modes under varying intermittent thermal storage ratios. Field experiment results reveal that increased intermittent operating time significantly enhances the single thermal storage and extraction performance of the SSTSH system, thereby improving operational efficiency. Simulations demonstrate that in the SSTSH system, higher intermittent thermal storage ratios lead to improved coefficients of performance (COP) and average thermal extraction during thermal extraction. After 12 h of thermal extraction during the 48h trial period, intermittent thermal storage ratios of 1/3, 1, and 3 yield respective increases in extracted heat by 25.88 %, 39.26 %, and 48.28 % compared with continuous thermal extraction operations. Moreover, intermittent thermal storage operations result in lower surrounding rock temperature drops and longer recovery periods, further enhancing system efficiency. Employing the intermittent operation strategy in the SSTSH system presents a promising solution to mitigate the thermal imbalance of ground source heat pumps, thereby facilitating their application in cold-region tunnels.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122667"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 point-interval wind speed prediction model based on entropy clustering and hybrid optimization weighted strategy

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122653

Jujie Wang, Shuqin Shu, Shulian Xu

{"title":"A point-interval wind speed prediction model based on entropy clustering and hybrid optimization weighted strategy","authors":"Jujie Wang, Shuqin Shu, Shulian Xu","doi":"10.1016/j.renene.2025.122653","DOIUrl":"10.1016/j.renene.2025.122653","url":null,"abstract":"<div><div>Wind speed prediction is crucial for effective energy management, power dispatching, and optimizing wind energy conversion systems. However, its inherent randomness and instability pose significant challenges. This paper introduces a wind speed prediction method that enhances accuracy through entropy clustering and a hybrid optimization weighted strategy. Firstly, the training set is decomposed and reconstituted into multiple feature subsequences by the improved complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN). Secondly, the internal relationship between the training set and these subsequences is constructed through the gated recurrent unit (GRU). To prevent information leakage, this relationship is mapped to the testing set. Based on the characteristics of each subsequence, the optimal prediction model is selected. Finally, chaos game optimization (CGO) is used to weighted integrate the prediction results of each model to obtain the final point and interval prediction results. The proposed method is evaluated using data from six Chinese wind farms located in diverse geographical areas. Compared with other models, the mean squared error (MSE) of the proposed method on the six datasets is 0.882 m/s, 0.507 m/s, 0.174 m/s, 0.197 m/s, 0.362 m/s and 0.322 m/s, respectively. This fully proves its effectiveness and broad application prospects.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122653"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Ni/N co-doped NH2-MIL-88(Fe) derived porous carbon as an efficient electrocatalyst for methanol and water co-electrolysis

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122661

Jingchuan Guo , Yan Gao , Xuankai Cao , Linxuan Li , Xin Yu , Shidan Chi , Haoyu Liu , Guohong Tian , Xudong Zhao

{"title":"Ni/N co-doped NH2-MIL-88(Fe) derived porous carbon as an efficient electrocatalyst for methanol and water co-electrolysis","authors":"Jingchuan Guo , Yan Gao , Xuankai Cao , Linxuan Li , Xin Yu , Shidan Chi , Haoyu Liu , Guohong Tian , Xudong Zhao","doi":"10.1016/j.renene.2025.122661","DOIUrl":"10.1016/j.renene.2025.122661","url":null,"abstract":"<div><div>The technology of using electricity generated from renewable energy sources such as wind and solar power for water electrolysis to produce hydrogen has achieved high efficiency, high purity, and environmental friendliness. However, its further development is constrained by the high overpotential of the oxygen evolution reaction (OER) and the high cost of precious metal catalysts. The methanol oxidation reaction (MOR) as an alternative to OER can significantly reduce overall energy consumption and accelerate the hydrogen evolution reaction. This study innovatively utilizes the metal-organic framework (MOF) of NH₂-MIL-88(Fe) to introduce Ni doping, preparing a series of Fe<sub>x</sub>Ni<sub>y</sub>-MOF and their bimetallic carbon derivatives (Fe<sub>x</sub>Ni<sub>y</sub>/C) through solvothermal synthesis and high-temperature carbonization. Results show that FeNi₂/C exhibited excellent performance in OER, with a Tafel slope of 38.69 mV·dec⁻<sup>1</sup> and an overpotential of 335 mV at 10 mA cm⁻<sup>2</sup>, comparable to RuO₂. In MOR, the overpotential was 193 mV, reduced by approximately 140 mV compared to OER, with outstanding stability. The catalytic mechanism was analyzed using ion chromatography, revealing the key role of Ni doping in enhancing catalytic activity and stability. This study provides new strategies for improving the electrocatalytic hydrogen production efficiency of renewable energy and reducing the production cost of hydrogen energy.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122661"},"PeriodicalIF":9.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Experimental investigation on voltage response during mode switching from electrolysis cell to fuel cell when using gas purge

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-13 DOI: 10.1016/j.renene.2025.122658

Huiyan Li, Fang Ye, Hang Guo

引用次数: 0

Field measurement and simulation of a novel passive solar and shallow-geothermal heating system designed for temporary prefabricated houses

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-12 DOI: 10.1016/j.renene.2025.122648

Wei Han , Yongcai Li , Fangqi Lu , Ruihua Yan , Sheng Li , Xiaohan Tao

{"title":"Field measurement and simulation of a novel passive solar and shallow-geothermal heating system designed for temporary prefabricated houses","authors":"Wei Han , Yongcai Li , Fangqi Lu , Ruihua Yan , Sheng Li , Xiaohan Tao","doi":"10.1016/j.renene.2025.122648","DOIUrl":"10.1016/j.renene.2025.122648","url":null,"abstract":"<div><div>Temporary buildings have become the main options in emergency situations. However, they usually have poor indoor thermal environment and air quality in winter. In this paper, a novel passive ventilation and heating system utilizing solar and shallow-geothermal for temporary prefabricated houses is proposed. The aims of this study was to experimentally and numerically evaluate the heating performance of the proposed system under cold weather conditions. The field measurement results validated that the passive heating system can provide 24-h ventilation, and effectively elevate the indoor temperature. The average indoor temperature was elevated by 5.3 °C, and the maximum temperature rise was 8.3 °C at night. Simulation results revealed that increasing chimney height can reduce the reverse buoyancy force. The peak ventilation rate increased from 120.2 to 365.7 m<sup>3</sup>/h, and the indoor temperature increased from 7.2 to 13.1 °C when the chimney height increased from 2 to 5 m. The effects of pipe and ground solar collector lengths on the system performance were not as important as that of the chimney height. The peak daytime airflow rate and indoor temperature increased from 0 to 171.5 m<sup>3</sup>/h, and from 8.2 to 11.7 °C, respectively, when roof solar collector length increased from 3.6 to 6.0 m.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122648"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Experimental investigation of a baffled photovoltaic-thermal air collector with SiC nano-embedded thermal paste: A comparative study

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-12 DOI: 10.1016/j.renene.2025.122649

Emine Yağız Gürbüz , İstemihan Şahinkesen , Azim Doğuş Tuncer , Onur Vahip Güler , Ali Keçebaş , Aleksandar G. Georgiev

{"title":"Experimental investigation of a baffled photovoltaic-thermal air collector with SiC nano-embedded thermal paste: A comparative study","authors":"Emine Yağız Gürbüz , İstemihan Şahinkesen , Azim Doğuş Tuncer , Onur Vahip Güler , Ali Keçebaş , Aleksandar G. Georgiev","doi":"10.1016/j.renene.2025.122649","DOIUrl":"10.1016/j.renene.2025.122649","url":null,"abstract":"<div><div>This study introduces a novel enhancement to photovoltaic-thermal (PVT) air collectors by integrating fins with silicon carbide (SiC) nanoparticles-doped thermal paste, a method not previously explored in the literature. The innovation leverages the superior thermal conductivity of SiC nanoparticles to improve heat dissipation, optimizing both electrical and thermal efficiency. Experimental tests were conducted on three configurations: a reference PVT system, a PVT system with fins using regular thermal paste, and a PVT system with fins attached using a SiC nanoparticles-doped thermal paste. The results demonstrated that the SiC-enhanced configuration (PVT-3) achieved the highest average efficiencies: 14.5 % electrical and 75.5 % thermal, outperforming the conventional setup (PVT-1) by 3 % and 25 %, respectively. PVT-3 outperformed PVT-2 by 7.7 % in thermal efficiency and 6.2 % in electrical efficiency. Additionally, PVT-3 showed a superior exergy efficiency of 11.7 %, a normalized power output efficiency (NPOE) of 66.2 %, a performance ratio (PR) of 0.85, and a sustainability index (SI) of 1.1. Economic analysis highlighted a net benefit of €59.17 with a LCOE of €0.0138/kWh and LCOH of €0.0029/kWh, demonstrating its economic feasibility despite a slightly longer payback period compared to the non-nanoparticle system. These findings confirm that integrating SiC nanoparticles into PVT systems enhances heat management, energy output, and economic performance. This study contributes to the development of sustainable energy solutions by improving PVT systems for broader adoption in renewable energy applications.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122649"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Based on the centrifugal force and the coupling of the magnetic linkage effect broadband rotational energy harvester

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-02-12 DOI: 10.1016/j.renene.2025.122640

Linqiang Feng, Lipeng He, Chensheng Wang, Jingwei Yang, Jing Li, Bowen Yang

{"title":"Based on the centrifugal force and the coupling of the magnetic linkage effect broadband rotational energy harvester","authors":"Linqiang Feng, Lipeng He, Chensheng Wang, Jingwei Yang, Jing Li, Bowen Yang","doi":"10.1016/j.renene.2025.122640","DOIUrl":"10.1016/j.renene.2025.122640","url":null,"abstract":"<div><div>In this paper, based on the centrifugal force and the coupling of the magnetic linkage effect broadband rotational energy harvester (CM-REH) is proposed. It can operate efficiently over a wide frequency range, especially low-frequency excitation. The structure uses centrifugal force to make the position of the exciter in the turntable change with the change of rotational speed, and is coupled with the magnet at the tip of the piezoelectric sheet, and then realizes broadband through the magnetic linkage effect between the three piezoelectric sheets. It is shown that spring stiffness and magnetic spacing have a significant influence on power generation performance and broadband effect. The optimal structural parameters of the device are determined as the spring wire diameter is 0.5 mm, the magnetic moment is 16 mm, and the peak-to-peak voltage is 61.6 V at 300 rpm. In the frequency range of 0–10 Hz, it can produce up to 4.9 mW of output power, which is 300 % wider than the traditional non-magnetic-linkage effect structure, and the power is increased by 80 %. In summary, CM-REH can effectively collect rotational energy in a wide band, and has broad application prospects in wireless self-power supply and self-sensing.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122640"},"PeriodicalIF":9.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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