Renewable Energy最新文献_第8页

Effect of mooring system stiffness on floating offshore wind turbine loads in a passively self-adjusting floating wind farm 系泊系统刚度对被动自调节浮动风电场中海上风力涡轮机负载的影响

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121823

Mohammad Youssef Mahfouz, Po Wen Cheng

引用次数: 0

A study on the thermochemical conversion characteristics of biomass mixed blast furnace slag catalyst coupled in supercritical CO2/H2O atmosphere 超临界 CO2/H2O 大气耦合生物质混合高炉矿渣催化剂的热化学转化特性研究

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121942

Yimeng Wei , Qingang Xiong , Lin Lang , Hao Luo , Hui Jin

{"title":"A study on the thermochemical conversion characteristics of biomass mixed blast furnace slag catalyst coupled in supercritical CO2/H2O atmosphere","authors":"Yimeng Wei , Qingang Xiong , Lin Lang , Hao Luo , Hui Jin","doi":"10.1016/j.renene.2024.121942","DOIUrl":"10.1016/j.renene.2024.121942","url":null,"abstract":"<div><div>To reduce excessive CO<sub>2</sub> in the environment and reutilize waste blast furnace slag, thermochemical reduction methods have become a focus of attention. The waste blast furnace slag as the catalyst, thermochemical conversion of biomass and its mixed catalyst under supercritical CO<sub>2</sub> (scCO<sub>2</sub>)/scCO<sub>2</sub> mixed H<sub>2</sub>O atmosphere were compared to explore the best CO<sub>2</sub> consumed condition. The composition and thermal stability of the raw materials were analyzed by inductively coupled plasma mass spectrometry (ICP-MS), X-ray fluorescence spectrometer (XRF), thermogravimetric analysis (TGA) and simultaneous thermal analysis (STA), while gas chromatograph (GC), gas chromatography mass spectrometer (GC-MS), scanning electron microscope (SEM), brunauer emmette teller (BET), fourier transform infrared spectrometer (FT-IR) and X-ray diffractometer (XRD) were used to analyze the properties of the products. As a result, the scCO<sub>2</sub> atmosphere increased the consumption of CO<sub>2</sub> during the reaction process compared to the N<sub>2</sub> atmosphere. Under the scCO<sub>2</sub> mixed H<sub>2</sub>O atmosphere, the addition of the catalyst resulted in the highest H<sub>2</sub> yield of 5.90 ± 0.01 mol/kg, led to an increase in HE from 58.17 % to 69.16 %, and also greatly facilitated the phenolic hydroxyl groups -OH and carboxyl groups C=O on the solid products to be detached from the aromatic ring. The specific surface area of the biomass reached the optimum value of 240.83 m<sup>2</sup>/g in the CHE7 when the characteristic peaks 002 and 100 intensities displayed high stack height and lateral dimensions.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121942"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699090","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

Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters 分析组合式太阳能烟囱中的对流传热：关键影响参数的理论和数值研究

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121933

Huimin Cui , Mengjiao Han , Jitao Zhang , Zhiming Han , Qingkuan Liu

{"title":"Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters","authors":"Huimin Cui , Mengjiao Han , Jitao Zhang , Zhiming Han , Qingkuan Liu","doi":"10.1016/j.renene.2024.121933","DOIUrl":"10.1016/j.renene.2024.121933","url":null,"abstract":"<div><div>Combined solar chimneys represent a potent mechanism for harnessing solar energy to bolster natural ventilation in green building designs. This study focuses on the impact of structural parameters and external conditions on the ventilation and heat transfer performance of such systems. Through scaling analysis and numerical simulations, this study investigate the flow dynamics and heat transfer mechanisms. The mechanism and the influence of three critical control parameters: inlet size ratio (<em>h</em>/<em>H</em>), ratio of inclined to vertical section lengths (<em>L</em>/<em>H</em>), and Rayleigh number (<em>Ra</em>) is examined. The results indicate that ventilation and heat exchange performance exhibit an initial increase followed by a decline as the inlet size ratio expands from 0.10 to 0.40. Optimal ventilation efficiency is observed at a Rayleigh number of 1.98 × 10<sup>14</sup> with an inlet size ratio of 0.15. Conversely, a low ratio of inclined to vertical section lengths (<em>L</em>/<em>H</em> = 0.20) correlates with suboptimal ventilation performance. Both ventilation intensity and efficiency are positively correlated with increases in <em>Ra</em>. This research quantitatively delineates these relationships, providing a theoretical foundation for the design of natural ventilation systems in sustainable buildings using combined solar chimneys.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121933"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699087","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

Process simulation and economic evaluation of the industrial production of triacetin from glycerol: Comparing acetic acid and acetic anhydride as possible reagents 从甘油中工业化生产三醋精的工艺模拟和经济评估：比较醋酸和醋酸酐作为可能的试剂

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121943

Heitor C. dos Santos, Beatriz E. Stutz, André F. Young

{"title":"Process simulation and economic evaluation of the industrial production of triacetin from glycerol: Comparing acetic acid and acetic anhydride as possible reagents","authors":"Heitor C. dos Santos, Beatriz E. Stutz, André F. Young","doi":"10.1016/j.renene.2024.121943","DOIUrl":"10.1016/j.renene.2024.121943","url":null,"abstract":"<div><div>The objective of this work was to simulate, in Aspen HYSYS® v12.1, the process of obtaining triacetin from glycerol through three chemical routes: via acetic acid (Route 1), acetic anhydride (Route 2), and a combination of acetic acid and acetic anhydride in two separate reactors (Route 3). Additionally and as a novelty, it was investigated the technical and economic viability of a multipurpose plant to this end. It was verified that Route 1 resulted in the best triacetin breakeven prices, even though it would still not be competitive in the considered economic context. On the other hand, Route 2 presented the worst performance due to low conversion (11 %) and higher price of acetic anhydride. The combined route resulted in intermediate breakeven prices for triacetin, despite achieving the highest conversion (79 %) and highest final product purity (96 %). Yield/selectivity and the separation steps were identified as the main bottlenecks in these processes, with reactors and distillation columns accounting for more than 95 % of the equipment costs. The multipurpose plant proved technically possible, and it can be economically interesting depending on the market prices for acetic acid and acetic anhydride.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"237 ","pages":"Article 121943"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698919","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

An investment game model for offshore power grid multi-stage expansion planning 海上电网多阶段扩展规划的投资博弈模型

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121938

Siyu Tao

{"title":"An investment game model for offshore power grid multi-stage expansion planning","authors":"Siyu Tao","doi":"10.1016/j.renene.2024.121938","DOIUrl":"10.1016/j.renene.2024.121938","url":null,"abstract":"<div><div>The offshore power grid (OPG) which connects multiple neighboring coastal countries is an effective solution to collect and deliver electricity generated by offshore wind farms (OWFs). The transmission network investment decision of the OPG expansion tends to be decentralized where individual stakeholder's strategies are interactive. This paper proposes a two-stage game model to tackle the conflict between the minimum expenditure and the maximum profit of each investor. In the first stage, a cooperative game model is formulated where the players are the OWF investors and the strategies are the connection typologies. The cost of the High Voltage Alternating Current (HVAC) transmission system and the offshore hubs is to be minimized and allocated to each player according to the Shapley value method. In the second stage, a non-cooperative game model is proposed where the players are the coastal countries, represented by onshore nodes and the strategies are the topology of the High Voltage Direct Current (HVDC) transmission system connecting the onshore nodes and the OWFs/offshore nodes. The net present value (NPV) ratio of each player is to be maximized and the Nash equilibrium (NE) is found in different modes. The case study on an OPG with three onshore nodes and two OWFs verifies the effectiveness of the proposed model.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121938"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698460","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

From diesel reliance to sustainable power in Iraq: Optimized hybrid microgrid solutions 伊拉克从依赖柴油到可持续电力：优化的混合微电网解决方案

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121905

Kawakib Arar Tahir , Juanjo Nieto , Carmen Díaz-López , Javier Ordóñez

{"title":"From diesel reliance to sustainable power in Iraq: Optimized hybrid microgrid solutions","authors":"Kawakib Arar Tahir , Juanjo Nieto , Carmen Díaz-López , Javier Ordóñez","doi":"10.1016/j.renene.2024.121905","DOIUrl":"10.1016/j.renene.2024.121905","url":null,"abstract":"<div><div>This study investigates Iraq’s challenging electricity landscape, exacerbated by the cumulative impacts of four wars, leading to daily power outages. The reliance on neighborhood diesel generators (NDG) as a temporary fix is critically assessed, with a strong expert consensus via the Delphi method advocating for a transition to solar photovoltaic (SPV) panels. The Delphi survey involved 20 experts, with 85% agreeing on the necessity of this transition, and high consensus (90% or higher) achieved on key questions regarding the inadequacy of NDG and the suitability of SPV as a replacement. The scarcity of local load data prompted the adaptation of Spain’s load profiles to Iraq using the innovative <span>Rosetta</span> transform, identifying the optimal number of SPV panels needed for low, base, and high consumption scenarios as 7, 9, and 11 panels, respectively. In a first approach to the viability of such an SPV installation, it is deduced that the minimum prices per kWh should be between $0.106 and $0.078, depending on the scenario, for it to be viable, well above the current prices in Iraq. A deeper analysis was then performed to evaluate Hybrid Microgrid Systems (HMGS) integrating SPVs, batteries and gasoline generators, both off-grid and grid-connected, and taking into account NDG-related savings. This analysis evidenced the viability of a grid-connected HMGS, leveraging SPV and battery storage, as the most economically viable solution, achieving payback periods up to 3.6 years in the best case. This research underscores the need for a policy shift towards sustainable energy solutions in Iraq and similar contexts, highlighting the technical and economic advantages of adopting clean, renewable energy systems over traditional NDG, and paving the way for a sustainable energy future.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121905"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722237","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

Cogeneration processes based on giant reed gasification combined with ORC and district heating for heat recovery: Comparative energy and exergy analysis 基于巨型芦苇气化的热电联产工艺，结合 ORC 和区域供热进行热量回收：能量和放能比较分析

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121944

Mauro Prestipino , Antonio Piccolo , Carlos Mourao Vilela , Antonio Galvagno

{"title":"Cogeneration processes based on giant reed gasification combined with ORC and district heating for heat recovery: Comparative energy and exergy analysis","authors":"Mauro Prestipino , Antonio Piccolo , Carlos Mourao Vilela , Antonio Galvagno","doi":"10.1016/j.renene.2024.121944","DOIUrl":"10.1016/j.renene.2024.121944","url":null,"abstract":"<div><div>This research work develops a comprehensive exergy and energy assessment of a cogeneration process using Giant Reed as feedstock, which consists of a biomass dryer, a fluidized bed gasifier, an internal combustion engine operating in a cogeneration mode (CHP), and two different users for the cogenerated heat. One process layout uses cogenerated heat in a district heating network (CHP + DH layout). In the second process layout, the cogenerated heat produces additional electricity through an Organic Rankine Cycle (CHP + ORC layout). In addition to the performance of reed gasification (cold gas efficiency about 0.6), the results showed that the highest rational efficiency was reached in the cogeneration unit, while the highest relative irreversibilities were found in the gasifier and the dryer. The overall energy efficiencies are 0.46 and 0.22 for the CHP + DH and CHP + ORC layouts, respectively, while the overall exergy efficiencies are 0.21 and 0.20. The difference in the sustainability index is just 2 %. The results and methods of this research work can be used to properly design Giant Reed (or similar biomass) gasification plants and bioenergy systems for combined heat and power production, and developing case-studies considering the sustainable use of this feedstock according to a thermodynamic approach based on the second principle.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121944"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698554","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

Quantitative assessment approach of fuel cell operating state of safety based on potential field method 基于电位场法的燃料电池运行安全状态定量评估方法

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121782

Weitao Zou , Jianwei Li

{"title":"Quantitative assessment approach of fuel cell operating state of safety based on potential field method","authors":"Weitao Zou , Jianwei Li","doi":"10.1016/j.renene.2024.121782","DOIUrl":"10.1016/j.renene.2024.121782","url":null,"abstract":"<div><div>The fuel cell holds significant promise for vehicle applications due to its low carbon footprint and high efficiency. Accurate assessment of the state of safety (SOS) of fuel cells is crucial for ensuring vehicle safety, given the electrochemical characteristics, structure, and material properties involved. However, evaluating the safety performance of fuel cells is challenging, as it encompasses various factors such as mechanical, electrical, thermal, and chemical aspects, making quantitative SOS assessment difficult. Existing literature provides qualitative descriptions but lacks numerical quantification of the operational safety performance of fuel cell systems. To address this gap, this paper introduces, for the first time, a potential field method to quantitatively evaluate the operational safety of fuel cells. The model establishes a fuel cell behavior potential field by defining feasible regions for control or state variables, representing the mapping relationship between fuel cell behavior and the state of safety. Additionally, the proposed potential field model’s real-time performance is validated in a test case, demonstrating its feasibility and applicability for quantitatively assessing the fuel cell state of safety.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121782"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698558","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

Impacts of overlapping regulation on the electricity market concerning renewable portfolio standards and carbon emission trading 关于可再生能源组合标准和碳排放交易的重叠监管对电力市场的影响

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121951

Fanshuai Hu , Dequn Zhou , Yinghao Pan , Jinghe Sun , Qingyuan Zhu

{"title":"Impacts of overlapping regulation on the electricity market concerning renewable portfolio standards and carbon emission trading","authors":"Fanshuai Hu , Dequn Zhou , Yinghao Pan , Jinghe Sun , Qingyuan Zhu","doi":"10.1016/j.renene.2024.121951","DOIUrl":"10.1016/j.renene.2024.121951","url":null,"abstract":"<div><div>The renewable portfolio standards (RPS) and carbon emission trading (CET) are considered effective emission reduction policy tools. However, the policy impact will become complex when there is overlapping regulation and an increase in trading entities. To analyze the policy effectiveness, this paper constructs a game model combined with goal programming to simulate the electricity market trading which consists of electricity generators and retailers. Green certificate trading and carbon trading are considered. Our research findings highlight the following key points: (1) As quota obligation increases, the strategy of large capacity generator is to increase wholesale price, while the strategy of small capacity generator is to lower wholesale price and increase electricity production. (2) Interestingly, the profit of generators first increases and then decrease with the quota obligation under independent mechanism. Retailers also maximize their profit when the quota obligation is intermediate. (3) The effectiveness of policies in reducing emissions and promoting the development of renewable energy may be ineffective. The quota obligation may reduce green electricity production, and carbon quotas may also increase thermal power production. The policy effects on different entities with different production technologies also varies significantly.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121951"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699092","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

Performance evaluation of greenhouse solar dryer: Energy-exergy analysis, CFD simulation and eco-environmental assessment 温室太阳能干燥机的性能评估：能耗分析、CFD 模拟和生态环境评估

IF 9 1区工程技术

Renewable Energy Pub Date : 2024-11-19 DOI: 10.1016/j.renene.2024.121946

Ali Daliran, Morteza Taki, Afshin Marzban, Majid Rahnama, Rouhollah Farhadi

{"title":"Performance evaluation of greenhouse solar dryer: Energy-exergy analysis, CFD simulation and eco-environmental assessment","authors":"Ali Daliran, Morteza Taki, Afshin Marzban, Majid Rahnama, Rouhollah Farhadi","doi":"10.1016/j.renene.2024.121946","DOIUrl":"10.1016/j.renene.2024.121946","url":null,"abstract":"<div><div>Solar greenhouse drying is considered a useful solar dryer technology for tropical and subtropical countries. This study examined a Quonset Solar Greenhouse Dryer (QSGD) with a parabolic roof and polycarbonate sheets on a 2.47 × 6.0 m<sup>2</sup> concrete floor, ventilated by two 220-V AC fans. The drying kinetics of mint leaves, energy-exergy analysis, Computational Fluid Dynamics (CFD) validation, economic viability and environmental impact were investigated. Mint leaves were dried from 85 % to 10 % moisture content in 3.5 h. The QSGD's energy and exergy efficiencies were 32 % and 22 %, respectively. The Discrete Ordinates (DO) radiation model simulated the effect of solar radiation inside the greenhouse dryer and the K-e model was used to account for the turbulent airflow. CFD 3-D simulations using ANSYS FLUENT ver.21 showed uniform temperature and airflow distribution, with good agreement between experimental and theoretical results. The outlet temperature ranged from 30 to 48 °C (experimental) and 34–50 °C (simulation) and also, higher air velocities were noted at the inlet and outlet. Environmental assessment revealed embodied energy of 47224.8 kWh, CO<sub>2</sub> emissions of 9.7 tons and net CO<sub>2</sub> mitigation of 130.7 tons over its lifetime. The Energy Payback Time (EPBT) and Payback Period (PBP) were 3.1 and 1.64 years, respectively.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"238 ","pages":"Article 121946"},"PeriodicalIF":9.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697365","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