Sustainable Energy Technologies and Assessments最新文献

{"title":"Evaluating the potential of oil seed extract ashes from niger, cotton, and flaxseed as sustainable supplementary cementitious materials","authors":"Ashita Singh ,&nbsp;Harish Panghal ,&nbsp;Deb Kumar Rath ,&nbsp;Rajesh Kumar ,&nbsp;Sandeep Chaudhary","doi":"10.1016/j.seta.2025.104285","DOIUrl":"10.1016/j.seta.2025.104285","url":null,"abstract":"<div><div>This study evaluates the potential of oil seed extract ashes (OSAs) from niger, cotton, and flaxseed, as a supplementary cementitious material (SCM) in cement mortar applications. The pozzolanic reactivity of niger and flaxseed OSAs was assessed through compressive strength tests, with results showing 28-day strengths of 40.74 MPa and 43.36 MPa, respectively, achieving 85–90% of OPC at 48.73 MPa. Workability tests revealed slight reductions in flow diameters for niger (115 mm) and flaxseed (110 mm) OSAs compared to OPC (118 mm), indicating denser particle packing. In contrast, cotton OSA exhibited a higher flow of 140 mm. Cotton OSA lacks pozzolanic activity compared to niger and flaxseed due to the absence of CaO and Al₂O₃, along with very low SiO₂. Cost analysis demonstrated a 7.6–9.2% reduction in material costs, with niger-based mortar priced at INR 5504/m³ and flaxseed-based mortar at INR 5605/m³, compared to OPC at INR 6065/m³. CO₂ emissions were reduced by 19%, with niger and flaxseed OSA mortars emitting 401 kg CO₂/m³ and 400 kg CO₂/m³, respectively, compared to 494 kg CO₂/m³ for OPC. The microstructural characterization of these OSAs by FESEM, XRF, XRD, FTIR, Raman, and TGA confirms that these materials present viable, cost-effective, and eco-friendly alternatives to OPC as SCMs.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104285"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746682","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}

{"title":"Long-term techno-economic analysis considering system strength and reliability shortfalls of electric vehicle-to-grid-systems installations integrated with renewable energy generators using hybrid GRU-classical optimization method","authors":"Md. Ohirul Qays ,&nbsp;Iftekhar Ahmad ,&nbsp;Daryoush Habibi ,&nbsp;Paul Moses","doi":"10.1016/j.seta.2025.104294","DOIUrl":"10.1016/j.seta.2025.104294","url":null,"abstract":"<div><div>Higher penetration of Electric Vehicle-to-Grid charging stations (EV2GCSs) in power grids integrated with renewable energy generators (REGs) result in system-instabilities raising the risk of blackout issues. Although techno-economic feasibility of EV2GCSs has been identified within the literature addressing power outage and financial concerns as a contemporary solution, no long-term techno-economic analysis has been investigated considering system strength and reliability shortfalls before the EV2GCSs installation. Therefore, this research aims to evaluate the long-term (2025–2045) techno-economic analysis of EV2GCSs into REGs-integrated grid systems by accounting for system strength and reliability factors. A novel optimization framework is developed, combining Gated Recurrent Units (GRU) and classical optimization method to achieve optimal size and location of EV2GCSs. The GRU model predicts the energy usage of the EV2GCSs, which is further applied in the classical optimization model to achieve optimal results that analyze long-term techno-economic performance. The obtained results are compared with the existing optimization approaches and non-optimal scenarios, where the proposed research showed that net present value and net profit values can be improved by 19.62% and 13.85% respectively, using the developed optimization framework. Results also show that the system strength level and system reliability can be enhanced approximately 11.829% and 8.671% respectively.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":""},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814805","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}

{"title":"Configuration design, heat transfer analysis and performance evaluation of a novel asynchronous stacked electrocaloric refrigeration device","authors":"Yan Liu ,&nbsp;Cheng-Kang Li ,&nbsp;Gui Lu ,&nbsp;Liang Wang ,&nbsp;Jing-Hui Meng","doi":"10.1016/j.seta.2025.104300","DOIUrl":"10.1016/j.seta.2025.104300","url":null,"abstract":"<div><div>Electrocaloric refrigeration, as a sustainable refrigeration technology, remaining numerous challenges in the refrigeration efficiency and/or capacity of the existing reported electrocaloric refrigeration devices. In this study, a novel asynchronous stacked electrocaloric refrigeration device (ASERD) model is firstly proposed. The ASERD model enables simultaneous heat absorption and release within a single refrigeration cycle, thereby maintaining a significant vertical thermal gradient between the upper and lower electrocaloric sliding layers. This creates a “thermal wall” effect that impedes horizontal thermal reflux from the heat dissipation side to the microchip side, reducing the temperature at the microchip side by approximately 5 K compared to synchronous design. Secondly, six typical microchip local dynamic hotspots are designed to verify the ASERD model’s anti-interference ability to heat load fluctuations. During regulation process, the “thermal wall” effect continuously strengthens, resulting in increasing refrigeration performance. The maximum temperature rise is reduced by 9.87 K, 8 K, 9.51 K, 8.92 K, 6.85 K, and 6.98 K, respectively. Thirdly, two main regulation strategies for refrigeration performance enhancement are studied for ASERD model with higher degree of freedom: field intensity and motion frequency. In these two regulation strategies, two overregulated phenomena caused by heat conduction overshoot: temperature feedback and refrigeration reversal phenomenon are discussed in field intensity regulation. Based on above analysis, a hierarchical regulation strategy for refrigeration performance enhancement combining field intensity and motion frequency is proposed, further reducing maximum temperature rise by 10.65 K and 6.96 K compared to optimal single regulation. In summary, the feasibility of ASERD model is verified in principle, which achieves better refrigeration capability compared to conventional synchronous design. Besides, flexible regulation strategy for ASERD model is discussed to further improve the refrigeration performance. Therefore, the novel ASERD model demonstrates better potential application prospects.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104300"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777103","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}

{"title":"Comprehensive performance analysis of semitransparent CdTe PV windows in static and dynamic facades: A real ship case study","authors":"Hui Hu ,&nbsp;Lijie Xu ,&nbsp;Wenzhu Huang ,&nbsp;Jie Ji ,&nbsp;Shangkun Zhong ,&nbsp;Jingyong Cai ,&nbsp;Leyang Dai ,&nbsp;Cheng Chen","doi":"10.1016/j.seta.2025.104297","DOIUrl":"10.1016/j.seta.2025.104297","url":null,"abstract":"<div><div>PV windows are mostly installed on fixed facades of static buildings with limitations such as partial shading and non-uniformity power generation. Ships, as special man-made construction, their orientation and speed are changeable under sailing condition. A significant portion of ship’s energy consumption is dedicated to maintaining the comfort of cabin environment. To expand the PV windows application scenarios and reduce the cabin energy consumption, this paper proposes an innovative application of CdTe PV windows in ship-based moving condition. The dynamic variations in solar irradiation received angle depend on different energy converting orientations of PV window since the ship movements. Thus, PV windows can avoid non-uniform irradiation and partial shading, leading to better energy harvesting efficiency in solar energy capture when PV windows are connected in parallel. The comprehensive performance of PV windows is compared under two conditions: a mooring condition with a northwest-facing bow and a sailing condition with closed sailing routes. The results indicate that under sailing condition, the average power generation efficiency of PV windows increased by 65.05% and heat transfer was reduced by 57.47%. The energy generation by PV windows can meet 100% of energy demand for ship cabin air conditioning and lighting under sailing condition.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104297"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760393","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}

{"title":"Optimized sizing of hybrid renewable energy systems for sustainable buildings with seasonal grey water treatment","authors":"Emine Esra Gerek","doi":"10.1016/j.seta.2025.104287","DOIUrl":"10.1016/j.seta.2025.104287","url":null,"abstract":"<div><div>This study introduces an innovative approach to the optimized sizing of hybrid renewable energy systems (HRES) for sustainable households. The system integrates photovoltaic panels, wind turbines, and backup batteries to achieve near-zero loss of load probability (LLP) while concurrently addressing energy and storage requirements for grey water treatment through electrocoagulation. Unlike conventional sizing methodologies that focus solely on energy generation and storage, the proposed dual-purpose optimization aligns the surplus electricity generation from correctly sized renewable sources with the energy requirements for grey water treatment, ensuring that the treatment process operates only when excess power is available. This unified optimization approach eliminates the need for additional energy infrastructure for wastewater treatment. The tank volume for the collected grey water is optimized to prevent overflow during the spring, summer, and fall seasons to ensure complete grey water is treatment that can be safely used for irrigation and flushing. Extensive simulations, validated against empirical data from Eskişehir, Turkey, demonstrate that the proposed system effectively balances energy generation and treatment demands, ensuring minimal infrastructure costs and reliable operation throughout seasonal variations while integrating the two separate sustainability goals.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104287"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817777","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}

{"title":"Transient characteristics analysis in variable-speed process of pump-turbine based on rothalpy change and vortex method","authors":"Xingqi Luo ,&nbsp;Minjia Chen ,&nbsp;Guojun Zhu ,&nbsp;Jianjun Feng","doi":"10.1016/j.seta.2025.104310","DOIUrl":"10.1016/j.seta.2025.104310","url":null,"abstract":"<div><div>Variable-speed (VS) operation enables rapid and flexible power adjustment in pump-turbines (PT), while operational stability during transient processes is critically dependent on internal flow dynamics. Thus, the transient flow field inside the PT during the VS transition process is investigated by numerical simulation. Based on rothalpy change and vortex methods, the changes in energy loss, vortex structure, and pressure pulsation during the VS process with the three openings are investigated. The results show that in the initial stage of the VS condition 1 (VSC1) that corresponds to small guide vane opening condition, the rothalpy change is significant in the vaneless region of the guide vane and the runner flow passage. Moreover, aggregated vortices are observed in the initial stage of VSC1, leading to significant power oscillations with an amplitude reaching 37.2% of the stable output. During the middle and late stages of VSC1, vortex intensity diminishes significantly, leading to the disappearance of oscillations. Increasing the guide vane opening mitigates vortex aggregation in the initial stage of VSC1, resulting in improved power stability.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104310"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808282","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}

{"title":"Assessment and optimization of SF6 recovery from SF6/N2 mixture via temperature swing adsorption cycle","authors":"Chunxiao Gao ,&nbsp;Ruikai Zhao ,&nbsp;Shuai Deng ,&nbsp;Li Zhao","doi":"10.1016/j.seta.2025.104288","DOIUrl":"10.1016/j.seta.2025.104288","url":null,"abstract":"<div><div>Sulfur hexafluoride (SF₆) is a powerful greenhouse gas. However, the existing studies primarily employ the pressure swing adsorption cycle or vacuum swing adsorption cycle for SF₆ recovery and tend to focus on a single performance indicator, thereby lacking a comprehensive assessment of the adsorption cycle across multiple dimensions. In this paper, the temperature swing adsorption (TSA) cycle model is constructed. Six performance indicators are selected for sensitivity analysis. A comprehensive assessment of SF₆ recovery using TSA cycle is conducted, focusing on the dimensions of production, separation, and energy efficiency. The multi-objective optimization is further performed. The aim of this work is to explore the feasibility of recycling SF₆ via the TSA cycle. Results indicate that the Toth model demonstrates the superior fit with <em>R</em>² of 0.9991. There is a positive correlation between the recovery and the purity, while the exergy efficiency displays a competitive relationship with recovery and the purity. Based on the TOPSIS decision-making method, the optimal values for the adsorption temperature and desorption temperature are found to be 293.00 K and 373.56 K, respectively. Under this operating condition, the recovery, purity, and exergy efficiency are achieved at 86.13 %, 98.69 %, and 2.70 %, respectively.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104288"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737895","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}

{"title":"Synergic effect of mechanical oscillation and metal foam on energy storage of PCM-concentrated photovoltaic modules: Numerical study","authors":"H. Rahmanian-Koushkaki ,&nbsp;S. Rahmanian ,&nbsp;M. Setareh ,&nbsp;S. Chen","doi":"10.1016/j.seta.2025.104301","DOIUrl":"10.1016/j.seta.2025.104301","url":null,"abstract":"<div><div>This research explores the combined effect of mechanical oscillation and metal foam on the thermal energy storage of a concentrated photovoltaic cell with a phase change material (PCM) enclosure. Various parameters such as foam porosity (85 %, 90 %, 95 %), oscillation frequency (5, 10, 20 Hz), and amplitude (0.5, 1, 1.5 mm) were studied for their impact on liquid fraction, temperature, and vorticity. The study found that PCM melts faster with mechanical oscillation due to increased circulation flow. Horizontal oscillation proved more effective than vertical, significantly reducing the complete melting time for PCM and PCM-foam mixtures, especially at 85 % porosity. As a result, the complete melting time of the PCM, PCM-foam porosity of 85 %, 90 % and 95 % under horizontal oscillation is 18.8 %, 45.7 %, 38.9 % and 35.3 % lower than the one in identical cases under vertical oscillation. Higher oscillation frequency and amplitude further reduced melting time by 22 % and 17 % respectively through generating larger vortices and enhancing convective heat transfer.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104301"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760391","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}

{"title":"PLS-R calibration models for fast prediction of oxidation stability of commercial biodiesel by spectroscopic techniques","authors":"Ryan Luka da Silva Borges ,&nbsp;Tácito Lucena Conte ,&nbsp;Luciana Marçal Ravaglia ,&nbsp;Glaucia Braz Alcantara ,&nbsp;Evandro Bona ,&nbsp;Diego Galvan","doi":"10.1016/j.seta.2025.104286","DOIUrl":"10.1016/j.seta.2025.104286","url":null,"abstract":"<div><div>Oxidative stability is an essential quality metric for biodiesel, widely assessed using the accelerated oxidation method with Rancimat®, which requires 6 or 13 h to comply with current regulations. In this study, we propose predicting the oxidative stability of commercial biodiesel using direct and rapid analytical techniques combined with partial least squares regression (PLS-R) and ¹H NMR and FTIR-ATR spectroscopy. Statistical parameters that assess the quality of the models indicate that both approaches demonstrated good performance, with residual prediction deviation (RPD) values exceeding 1.6 and relative standard deviation (RSD) below 9.3 %. Analytical figures of merit (AFOM) also yielded favorable outcomes, with limits of quantification (LOQ) and detection (LOD) consistent with the ranges studied. For NMR data, the zgig pulse sequence (which drastically reduces ¹H–¹³C satellite signals) proved more suitable for modeling. The main compounds contributing to the NMR models’ performance were hydroperoxides and derivatives. Several significant vibrational bands contributed to the model’s performance for the compact FTIR. More predictive models could be achieved using either samples from a single feedstock or without adding antioxidants. However, this is impractical once biodiesel production can involve diverse feedstocks and antioxidant additives. Including biodiesel from different feedstocks and with antioxidants increased the dataset’s variability, leading to more realistic models with broader applicability. Compared to the standard Rancimat® method, the NMR with PLS-R considerably reduces the analysis time by about 40 times and FTIR by approximately 220 times. However, building and validating predictive models is laborious and challenging and requires knowledge of data analysis.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":"Article 104286"},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746684","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}

{"title":"Rapid analysis of sustainable aviation fuel precursor in a fermentation system based on in-situ Raman spectroscopy","authors":"Hui Dong ,&nbsp;Huili Zhang ,&nbsp;Meng Wang ,&nbsp;Jan Baeyens ,&nbsp;Yunming Fang","doi":"10.1016/j.seta.2025.104305","DOIUrl":"10.1016/j.seta.2025.104305","url":null,"abstract":"<div><div>The ASTM have approved the hydro-processed esters and fatty acids (HEFA) and direct sugar to hydrocarbon (DSHC) bio-aviation fuel production pathway in 2011 and 2014, respectively. For the bio-aviation fuel precursor production, non-destructive and rapid in-situ detection of metabolites is of great significance for achieving the real-time monitoring and control of the fermentation process. To address the limitations of conventional analysis and detection methods, such as gas chromatography and gas chromatography-mass spectrometry, in process optimization and rapid detection, a rapid quantitative online Raman analysis of β-farnesene in fermentation and strain screening method was established, and was reported here for the first time. The testing time of β-farnesene can be reduced by at least 48 times, from 20 min to 25 s. The developed online Raman analysis method is suitable for in-situ rapid analysis and strain screening of bio-aviation fuel precursor (such as terpenes and fatty acids) with properties similar to those of β-farnesene.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"76 ","pages":""},"PeriodicalIF":7.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814804","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}