Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122606
M.A. Sharafeldin , Mohamed T. Abdelghany
Solar energy is one clean and sustainable energy source. It has drawn a lot of interest. Investigating pulsing flow in solar collectors was thus the goal of the current project. A pulsing flow was produced using a solenoid valve. Solar radiation, flow temperature, and flow rates were measured using a suite of monitoring equipment. The collector's thermal efficiency, area reduction, heat gain, and heat removal factor were all computed. Three frequencies were used: four, six, and 10 Hz. Three distinct flow rates were examined: 360, 420, and 480 L/h. The findings demonstrated that pulsating flow, as opposed to continuous flow, increases the heat gain and thermal efficiency of the flat plate solar collector. Lower frequencies are far more effective than higher ones. The thermal efficiency and heat gain of the collector are greatly impacted by higher flow rates. When the frequency is 4 Hz and the flow rate is 480 L/h, the maximum increase in maximum thermal efficiency is 22.8 %. The highest value for a lower frequency of 4 Hz with a higher flow rate of 480 L/h is 86.37. The area of the solar collector was decreased by at least 4 % and up to 26 % by using pulsating flow.
{"title":"Experimental investigation on the performance of a flat plate solar collector using pulsating flow","authors":"M.A. Sharafeldin , Mohamed T. Abdelghany","doi":"10.1016/j.renene.2025.122606","DOIUrl":"10.1016/j.renene.2025.122606","url":null,"abstract":"<div><div>Solar energy is one clean and sustainable energy source. It has drawn a lot of interest. Investigating pulsing flow in solar collectors was thus the goal of the current project. A pulsing flow was produced using a solenoid valve. Solar radiation, flow temperature, and flow rates were measured using a suite of monitoring equipment. The collector's thermal efficiency, area reduction, heat gain, and heat removal factor were all computed. Three frequencies were used: four, six, and 10 Hz. Three distinct flow rates were examined: 360, 420, and 480 L/h. The findings demonstrated that pulsating flow, as opposed to continuous flow, increases the heat gain and thermal efficiency of the flat plate solar collector. Lower frequencies are far more effective than higher ones. The thermal efficiency and heat gain of the collector are greatly impacted by higher flow rates. When the frequency is 4 Hz and the flow rate is 480 L/h, the maximum increase in maximum thermal efficiency is 22.8 %. The highest value for a lower frequency of 4 Hz with a higher flow rate of 480 L/h is 86.37. The area of the solar collector was decreased by at least 4 % and up to 26 % by using pulsating flow.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122606"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422201","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122597
Cheng Zhong, Tian-tian Feng, Yan Li
China's Renewable Portfolio Standards, which is known as the Renewable Power Consumption Guarantee Mechanism, is the core consumption policy for renewable power in China, but the lack of penalty and incentive measures in the current regulations may not be an effective constraint on a power system with high proportion of renewable power under the Dual Carbon Goal. We analyzed the current policy and proposed integratable penalty and incentive measures and carry out a questionnaire survey on the entities that need to comply with the policy to learn about the acceptance of the proposed measures. Subsequently, an evolutionary game model involving the government, power sellers and power purchasers was constructed to simulate different combinations of penalty and incentive measures. The results show that a reasonable policy bundle should include strict penalties and attractive incentives, such as suspending business licenses and offering favourable credit services. Finally reasonable measures are selected, and policy implementations were provided for the optimization of the policy Renewable Power Consumption Guarantee Mechanism.
{"title":"Designing incentives and penalties for China's renewable portfolio standards: A survey-based evolutionary game approach","authors":"Cheng Zhong, Tian-tian Feng, Yan Li","doi":"10.1016/j.renene.2025.122597","DOIUrl":"10.1016/j.renene.2025.122597","url":null,"abstract":"<div><div>China's Renewable Portfolio Standards, which is known as the Renewable Power Consumption Guarantee Mechanism, is the core consumption policy for renewable power in China, but the lack of penalty and incentive measures in the current regulations may not be an effective constraint on a power system with high proportion of renewable power under the Dual Carbon Goal. We analyzed the current policy and proposed integratable penalty and incentive measures and carry out a questionnaire survey on the entities that need to comply with the policy to learn about the acceptance of the proposed measures. Subsequently, an evolutionary game model involving the government, power sellers and power purchasers was constructed to simulate different combinations of penalty and incentive measures. The results show that a reasonable policy bundle should include strict penalties and attractive incentives, such as suspending business licenses and offering favourable credit services. Finally reasonable measures are selected, and policy implementations were provided for the optimization of the policy Renewable Power Consumption Guarantee Mechanism.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"243 ","pages":"Article 122597"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143272613","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122528
Can Ma , Taiyu Zhang , Zhiyu Jiang , Zhengru Ren
An integrated method for tower–nacelle–rotor assemblies has been proposed as an innovative approach to the transportation and installation of floating offshore wind turbines. This efficient approach offers potential value to the industry with increasing turbine sizes. During the mating phase at an offshore site, the installation system becomes a complex multibody system that involves a vessel, a wind turbine assembly, a crane, and a floating foundation. While much existing research focuses on the steady-state dynamic analysis of the lifted turbine assembly in fixed positions, the lowering operation of the assembly is an unsteady process with potential risks. To this end, this paper develops a fully coupled multibody model for the lowering scenario, accounting for the effects of environmental loads on the overall dynamic responses and the couplings between the multibodies. The study reveals the occurrence of re-impact phenomena between the foundation and the lifted structure under environmental loads, and the backward motion of the installation vessel during lowering. The selection of lowering speed and time instant for starting the operation both influence the occurrence of re-impact. Numerical simulation results offer valuable insights for heavy payload lowering operations and contribute to further decision making of assembly transportation and installation processes.
{"title":"Dynamic analysis of lowering operations during floating offshore wind turbine assembly mating","authors":"Can Ma , Taiyu Zhang , Zhiyu Jiang , Zhengru Ren","doi":"10.1016/j.renene.2025.122528","DOIUrl":"10.1016/j.renene.2025.122528","url":null,"abstract":"<div><div>An integrated method for tower–nacelle–rotor assemblies has been proposed as an innovative approach to the transportation and installation of floating offshore wind turbines. This efficient approach offers potential value to the industry with increasing turbine sizes. During the mating phase at an offshore site, the installation system becomes a complex multibody system that involves a vessel, a wind turbine assembly, a crane, and a floating foundation. While much existing research focuses on the steady-state dynamic analysis of the lifted turbine assembly in fixed positions, the lowering operation of the assembly is an unsteady process with potential risks. To this end, this paper develops a fully coupled multibody model for the lowering scenario, accounting for the effects of environmental loads on the overall dynamic responses and the couplings between the multibodies. The study reveals the occurrence of re-impact phenomena between the foundation and the lifted structure under environmental loads, and the backward motion of the installation vessel during lowering. The selection of lowering speed and time instant for starting the operation both influence the occurrence of re-impact. Numerical simulation results offer valuable insights for heavy payload lowering operations and contribute to further decision making of assembly transportation and installation processes.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"243 ","pages":"Article 122528"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376599","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122592
Leonid B. Krivdin
Present review focuses on the most recent and most significant results (the interim of 2019–2023) in the Nuclear Magnetic Resonance (NMR) of biofuel. Collected and discussed here are the most recent applications of 1H and 13C NMR spectroscopy to the structural studies and practical recommendations including the unique findings and breakthroughs within this period and providing a summary of new insights and advances in this field. 1H and 13C NMR spectroscopy plays an increasingly important role in structural studies and practical recommendations in the field of biofuel and biodiesel chemistry and technology. In general, 1D and 2D NMR spectroscopy in liquid phase and solid state is a powerful method used to characterize molecular structure of biofuel and to analyze and quantify its molecular composition. In particular, NMR is used to identify and quantify the components of biodiesel and biofuels after transesterification, purification and during storage. It is widely applied to characterize and assign molecular structure of biodiesel samples and to identify and quantify different molecular moieties.
{"title":"Recent advances in 1D and 2D liquid-phase and solid-state NMR studies of biofuel","authors":"Leonid B. Krivdin","doi":"10.1016/j.renene.2025.122592","DOIUrl":"10.1016/j.renene.2025.122592","url":null,"abstract":"<div><div>Present review focuses on the most recent and most significant results (the interim of 2019–2023) in the Nuclear Magnetic Resonance (NMR) of biofuel. Collected and discussed here are the most recent applications of <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy to the structural studies and practical recommendations including the unique findings and breakthroughs within this period and providing a summary of new insights and advances in this field. <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy plays an increasingly important role in structural studies and practical recommendations in the field of biofuel and biodiesel chemistry and technology. In general, 1D and 2D NMR spectroscopy in liquid phase and solid state is a powerful method used to characterize molecular structure of biofuel and to analyze and quantify its molecular composition. In particular, NMR is used to identify and quantify the components of biodiesel and biofuels after transesterification, purification and during storage. It is widely applied to characterize and assign molecular structure of biodiesel samples and to identify and quantify different molecular moieties.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"243 ","pages":"Article 122592"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378557","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122593
Chengzhang Zou , Weizhen Gao , Fengyi Ai
The ability to meet the increasing demand for those commodities is owed to Indonesia's mineral resources, which are now and, in the future, when environmental issues must be tackled. This research explores the relationship between resource exports and economic growth emission control in Indonesia from 1991 to 2021 within the 18 renewable energy countries. Employing the Poisson Pseudo Maximum Likelihood approach, it is identified that technological innovation and economic growth in the importing country affect emissions in Indonesia. Still, income growth poses a threat to Indonesia. At the same time, domestic income development presents some difficulties. Crucially, it emerged that crude oil and mineral prices were not linked to Green House Gas emissions. The analysis shows that variations in crude oil and minerals prices have negligible impact on Green House Gas emissions. Recommendations are to encourage the processing of value-added minerals and innovation in Indonesia for continued economy and enhancement of the sustainable mining system. Investigating the effect of mineral pricing on stable economic and environmental conditions is recommended for further research; the Indonesian geopolitical role in the green economy is presented.
{"title":"Strategic mineral policies for Indonesia: Enhancing global competitiveness, economic growth, and environmental sustainability through innovation and renewable energy","authors":"Chengzhang Zou , Weizhen Gao , Fengyi Ai","doi":"10.1016/j.renene.2025.122593","DOIUrl":"10.1016/j.renene.2025.122593","url":null,"abstract":"<div><div>The ability to meet the increasing demand for those commodities is owed to Indonesia's mineral resources, which are now and, in the future, when environmental issues must be tackled. This research explores the relationship between resource exports and economic growth emission control in Indonesia from 1991 to 2021 within the 18 renewable energy countries. Employing the Poisson Pseudo Maximum Likelihood approach, it is identified that technological innovation and economic growth in the importing country affect emissions in Indonesia. Still, income growth poses a threat to Indonesia. At the same time, domestic income development presents some difficulties. Crucially, it emerged that crude oil and mineral prices were not linked to Green House Gas emissions. The analysis shows that variations in crude oil and minerals prices have negligible impact on Green House Gas emissions. Recommendations are to encourage the processing of value-added minerals and innovation in Indonesia for continued economy and enhancement of the sustainable mining system. Investigating the effect of mineral pricing on stable economic and environmental conditions is recommended for further research; the Indonesian geopolitical role in the green economy is presented.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122593"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422390","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122615
Youhua Han , Jili Zhang , Liangdong Ma , Baojun Hou , Jian Gong , Hui Lv
In this paper, a trifunctional direct expansion photovoltaic-thermal heat pump (PVT-HP) system was constructed to provide domestic hot water, photovoltaic power, and chilled water for an activity center of sports in Dalian, China. The thermoelectric evaluation indicators were proposed to unify the single thermal and electrical performances of the system. Then, year-round experiments were conducted to investigate the trigeneration performance of the system in typical seasons. The operation characteristics of the system were analyzed under typical weather conditions in detail. Afterward, the thermal and comprehensive performances of the PVT evaporator were analyzed. The performance curves of the PVT evaporator were determined. Finally, the results demonstrate that the average coefficient of heating performance of the system was 2.92 in winter, 3.69 in summer, and 3.46 in transition season. The average thermoelectric comprehensive efficiency of the system was 33.72 % throughout the year. The average coefficient of cooling performance of the system was 2.62 during nighttime operation in summer. Moreover, the average thermal efficiency and total thermoelectric efficiency of the PVT evaporator were 60.37 % and 70.12 %, respectively. This study can provide a practical reference for the application and evaluation of solar PVT heat pump systems in building retrofit projects.
{"title":"Multigenerational performance analysis of a direct expansion PVT-HP system using year-long experimental data","authors":"Youhua Han , Jili Zhang , Liangdong Ma , Baojun Hou , Jian Gong , Hui Lv","doi":"10.1016/j.renene.2025.122615","DOIUrl":"10.1016/j.renene.2025.122615","url":null,"abstract":"<div><div>In this paper, a trifunctional direct expansion photovoltaic-thermal heat pump (PVT-HP) system was constructed to provide domestic hot water, photovoltaic power, and chilled water for an activity center of sports in Dalian, China. The thermoelectric evaluation indicators were proposed to unify the single thermal and electrical performances of the system. Then, year-round experiments were conducted to investigate the trigeneration performance of the system in typical seasons. The operation characteristics of the system were analyzed under typical weather conditions in detail. Afterward, the thermal and comprehensive performances of the PVT evaporator were analyzed. The performance curves of the PVT evaporator were determined. Finally, the results demonstrate that the average coefficient of heating performance of the system was 2.92 in winter, 3.69 in summer, and 3.46 in transition season. The average thermoelectric comprehensive efficiency of the system was 33.72 % throughout the year. The average coefficient of cooling performance of the system was 2.62 during nighttime operation in summer. Moreover, the average thermal efficiency and total thermoelectric efficiency of the PVT evaporator were 60.37 % and 70.12 %, respectively. This study can provide a practical reference for the application and evaluation of solar PVT heat pump systems in building retrofit projects.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122615"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422199","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122613
Qingshan Yang , Xingxin Zhang , Tian Li , Siu-seong Law , Xuhong Zhou , Dawei Lu
Understanding and predicting turbine wake effect is crucial for the development of wind farms. Most existing studies have primarily focused on flat terrain, resulting in a lack of analytical modeling of turbine wake in complex terrain. This study systematically investigates the time-averaged flow and turbulent behavior of the turbine in complex terrain using large eddy simulations (LES). It is found that the vertical and horizontal velocity components induced by the terrain can cause the turbine wake deflect, while changes in the pressure gradient affect the velocity recovery of the turbine wake. The velocity deficit of the turbine wake in complex terrain largely conforms to a Gaussian distribution. Additionally, the common practice of superimposing the turbine wake velocity deficit from flat terrain onto the terrain wind field cannot accurately predict the wake velocity distribution and power performance of the turbine in complex terrain. A new turbine wake model is proposed considering the wake deflection and variations in velocity deficit, in order to accurately predict the wake velocity distribution and power generation. The analysis reveals a significant improvement, with reductions in the maximum error of the average velocity at the turbine rotor plane and estimated power generation by 18 % and 31 %, respectively.
{"title":"Study on wind turbine wake effect and analytical model in hilly terrain","authors":"Qingshan Yang , Xingxin Zhang , Tian Li , Siu-seong Law , Xuhong Zhou , Dawei Lu","doi":"10.1016/j.renene.2025.122613","DOIUrl":"10.1016/j.renene.2025.122613","url":null,"abstract":"<div><div>Understanding and predicting turbine wake effect is crucial for the development of wind farms. Most existing studies have primarily focused on flat terrain, resulting in a lack of analytical modeling of turbine wake in complex terrain. This study systematically investigates the time-averaged flow and turbulent behavior of the turbine in complex terrain using large eddy simulations (LES). It is found that the vertical and horizontal velocity components induced by the terrain can cause the turbine wake deflect, while changes in the pressure gradient affect the velocity recovery of the turbine wake. The velocity deficit of the turbine wake in complex terrain largely conforms to a Gaussian distribution. Additionally, the common practice of superimposing the turbine wake velocity deficit from flat terrain onto the terrain wind field cannot accurately predict the wake velocity distribution and power performance of the turbine in complex terrain. A new turbine wake model is proposed considering the wake deflection and variations in velocity deficit, in order to accurately predict the wake velocity distribution and power generation. The analysis reveals a significant improvement, with reductions in the maximum error of the average velocity at the turbine rotor plane and estimated power generation by 18 % and 31 %, respectively.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122613"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422285","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122602
Yonghong Xu , Juan Fang , Hongguang Zhang , Songsong Song , Liang Tong , Baoying Peng , Fubin Yang
Compressed air energy storage (CAES) has attracted substantial attention due to its advantages, including low cost, long lifespan, and low environmental pollution. This paper establishes a test bench for a micro CAES system based on a scroll expander and employs experimental methods to investigate the effects of key parameters—regulated pressure, rotation speed, torque, volume flow rate (VFR), and expansion ratio on the output performance and energy conversion efficiency of the scroll expander and generator. The experimental results indicate that the power output of the scroll expander initially increases and then decreases with the increase of torque, rotation speed, expansion ratio, and VFR. The compressed air consumption rate (CACR) of the scroll expander initially decreases, stabilizes, and finally slightly increases with the increase of torque and expansion ratio. The CACR of the scroll expander slightly decreases at first, then flattens out, and eventually linearly increases trend with the increase of rotation speed and VFR. The power output of the generator initially increases to a peak value and then declines with changes in torque, rotation speed, expansion ratio, and VFR. The energy conversion efficiency of the generator first increases to the maximum value and then decreases with the increase of torque and rotation speed. To achieve high-efficiency operation, the generator should operate within a medium-to-low torque and a medium-to-high-speed range, with a maximum efficiency of approximately 95 %.
{"title":"Experimental investigation on the output performance of a micro compressed air energy storage system based on a scroll expander","authors":"Yonghong Xu , Juan Fang , Hongguang Zhang , Songsong Song , Liang Tong , Baoying Peng , Fubin Yang","doi":"10.1016/j.renene.2025.122602","DOIUrl":"10.1016/j.renene.2025.122602","url":null,"abstract":"<div><div>Compressed air energy storage (CAES) has attracted substantial attention due to its advantages, including low cost, long lifespan, and low environmental pollution. This paper establishes a test bench for a micro CAES system based on a scroll expander and employs experimental methods to investigate the effects of key parameters—regulated pressure, rotation speed, torque, volume flow rate (VFR), and expansion ratio on the output performance and energy conversion efficiency of the scroll expander and generator. The experimental results indicate that the power output of the scroll expander initially increases and then decreases with the increase of torque, rotation speed, expansion ratio, and VFR. The compressed air consumption rate (CACR) of the scroll expander initially decreases, stabilizes, and finally slightly increases with the increase of torque and expansion ratio. The CACR of the scroll expander slightly decreases at first, then flattens out, and eventually linearly increases trend with the increase of rotation speed and VFR. The power output of the generator initially increases to a peak value and then declines with changes in torque, rotation speed, expansion ratio, and VFR. The energy conversion efficiency of the generator first increases to the maximum value and then decreases with the increase of torque and rotation speed. To achieve high-efficiency operation, the generator should operate within a medium-to-low torque and a medium-to-high-speed range, with a maximum efficiency of approximately 95 %.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"243 ","pages":"Article 122602"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376598","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122616
Liliana Rusu
The objective of the present study is to evaluate the recent past and future wave climate in the Mediterranean Sea considering the wave simulation results under Representative Concentration Pathways (RCPs) scenarios and also the latest greenhouse gas emission scenarios established by the Intergovernmental Panel on Climate Change's (IPCC) in its Sixth Assessment Report (AR6) and denoted as Shared Socio-economic Pathways (SSPs). Results covering two time periods for 30 years each are considered in the analysis and they comprise the recent past (1976–2005) and the mid-term future (2041–2070) under the RCP8.5 and SSP5-8.5 scenarios. For this purpose, the SWAN (Simulating WAves Nearshore) model is used to simulate the sea state conditions while to force the wave model, wind fields provided by three Regional Climate Models (RCMs) are considered. A multi-model ensemble (MME) is constructed based on the wave simulation results using RCMs from the fifth phase of the Coupled Model Intercomparison Project (CMIP5). Hindcast data simulated by SWAN using ERA5 wind fields are considered as reference and in order to evaluate the ability of the historical data to recreate the recent past sea state conditions normalized differences between these data are computed. Comparisons between the historical and mid-term future results are also performed to assess the dynamics of the sea state conditions in the Mediterranean Sea.
{"title":"Climate change impact on the sea state conditions in the Mediterranean Sea under RCP and SSP emission scenarios","authors":"Liliana Rusu","doi":"10.1016/j.renene.2025.122616","DOIUrl":"10.1016/j.renene.2025.122616","url":null,"abstract":"<div><div>The objective of the present study is to evaluate the recent past and future wave climate in the Mediterranean Sea considering the wave simulation results under Representative Concentration Pathways (RCPs) scenarios and also the latest greenhouse gas emission scenarios established by the Intergovernmental Panel on Climate Change's (IPCC) in its Sixth Assessment Report (AR6) and denoted as Shared Socio-economic Pathways (SSPs). Results covering two time periods for 30 years each are considered in the analysis and they comprise the recent past (1976–2005) and the mid-term future (2041–2070) under the RCP8.5 and SSP5-8.5 scenarios. For this purpose, the SWAN (Simulating WAves Nearshore) model is used to simulate the sea state conditions while to force the wave model, wind fields provided by three Regional Climate Models (RCMs) are considered. A multi-model ensemble (MME) is constructed based on the wave simulation results using RCMs from the fifth phase of the Coupled Model Intercomparison Project (CMIP5). Hindcast data simulated by SWAN using ERA5 wind fields are considered as reference and in order to evaluate the ability of the historical data to recreate the recent past sea state conditions normalized differences between these data are computed. Comparisons between the historical and mid-term future results are also performed to assess the dynamics of the sea state conditions in the Mediterranean Sea.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"243 ","pages":"Article 122616"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348084","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}
Pub Date : 2025-02-04DOI: 10.1016/j.renene.2025.122580
Pegah Shadman , Alireza Shakeri , Sirus Zinadini
This study aims to design a novel composite polymer membrane to enhance Microbial Fuel Cell (MFC) performance. For this purpose, composite polymer membranes were synthesized by incorporating the Graphene oxide/Chitosan/2-aminothiazole/SO3H (GO-CS-2-aminothiazole-SO3H) in the sulfonated polyethersulfone (SPES) for electricity generation and wastewater treatment. The fabricated composite membranes (SPES/GO-CS-2-aminothiazole-SO3H) were analyzed using various methods. By embedding secondary amine (R'R″NH) and sulfonic acid (-SO3H) groups into the membranes, MFC performance, and membrane selectivity were ameliorated. A comparably remarkable power density (76.77 mW m−2) was obtained by utilizing the SPES/GO-CS-2-aminothiazole-SO3H 0.1 wt% as the membrane in double-chamber MFC, significantly higher than the result obtained for the SPES (3.19 mW m−2) and SPES/GO-CS 0.1 wt% (22.67 mW m−2) membranes. With the composite membrane, SPES/GO-CS-2-aminothiazole-SO3H 0.1 wt% in MFC, the COD removal efficiency of 89.54 % and a coulombic efficiency of 84.18 % were achieved. The results reveal that SPES/GO-CS-2-aminothiazole-SO3H 0.1 % can be considered a favorable membrane for MFC application.
{"title":"Incorporating GO-CS-2-aminothiazole-SO3H nanoparticles into sulfonated PES for improved MFC performance in power generation","authors":"Pegah Shadman , Alireza Shakeri , Sirus Zinadini","doi":"10.1016/j.renene.2025.122580","DOIUrl":"10.1016/j.renene.2025.122580","url":null,"abstract":"<div><div>This study aims to design a novel composite polymer membrane to enhance Microbial Fuel Cell (MFC) performance. For this purpose, composite polymer membranes were synthesized by incorporating the Graphene oxide/Chitosan/2-aminothiazole/SO<sub>3</sub>H (GO-CS-2-aminothiazole-SO<sub>3</sub>H) in the sulfonated polyethersulfone (SPES) for electricity generation and wastewater treatment. The fabricated composite membranes (SPES/GO-CS-2-aminothiazole-SO<sub>3</sub>H) were analyzed using various methods. By embedding secondary amine (R'R″NH) and sulfonic acid (-SO<sub>3</sub>H) groups into the membranes, MFC performance, and membrane selectivity were ameliorated. A comparably remarkable power density (76.77 mW m<sup>−2</sup>) was obtained by utilizing the SPES/GO-CS-2-aminothiazole-SO<sub>3</sub>H 0.1 wt% as the membrane in double-chamber MFC, significantly higher than the result obtained for the SPES (3.19 mW m<sup>−2</sup>) and SPES/GO-CS 0.1 wt% (22.67 mW m<sup>−2</sup>) membranes. With the composite membrane, SPES/GO-CS-2-aminothiazole-SO<sub>3</sub>H 0.1 wt% in MFC, the COD removal efficiency of 89.54 % and a coulombic efficiency of 84.18 % were achieved. The results reveal that SPES/GO-CS-2-aminothiazole-SO<sub>3</sub>H 0.1 % can be considered a favorable membrane for MFC application.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"244 ","pages":"Article 122580"},"PeriodicalIF":9.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422303","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}
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