Energy最新文献 - Book学术

Thermodynamic and safety analysis for hydrogen production in a supercritical water gasification system of coal by multi-oxidizers distribution 多氧化剂分布煤超临界水气化制氢热力学及安全性分析

IF 9 1区工程技术

Energy Pub Date : 2025-06-13 DOI: 10.1016/j.energy.2025.137105

Kui Luo , Runqiu Dong , Xujun Li , Zhiyong Peng , Libo Lu , Jialing Xu , Hui Jin , Liejin Guo

{"title":"Thermodynamic and safety analysis for hydrogen production in a supercritical water gasification system of coal by multi-oxidizers distribution","authors":"Kui Luo , Runqiu Dong , Xujun Li , Zhiyong Peng , Libo Lu , Jialing Xu , Hui Jin , Liejin Guo","doi":"10.1016/j.energy.2025.137105","DOIUrl":"10.1016/j.energy.2025.137105","url":null,"abstract":"<div><div>Coal supercritical water gasification (SCWG) for hydrogen production technology is highly prospective due to the clean and efficient treatment process. A single oxidation reactor heating method is usually used in existing work limiting the efficient and stable operation of the system due to high component temperatures. This paper proposed the heat supply strategy of multi-oxidation reactor and heat exchanger layout to improve the system performance for the realization of reasonable matching of material flow and energy flow in each stage of the system. The improved system reduced the maximum temperature of the oxidation reactor from 1550 °C to 850 °C, and the system exergy efficiency and H<sub>2</sub> yield reached 49.30 % and 101 kg/h (at the mass ratio of coal to water of 1:10), respectively. The exergy flow results showed that the improved system exergy loss was concentrated in the oxidation reactor (34.00 %) heat exchanger (28.86 %), cooler (19.07 %), and gasification reactor (9.70 %). Exergy efficiency increased as the mass ratio of coal to water increased to the maximum exergy efficiency of 53.50 %. As the temperature increased from 600 °C to 675 °C, the exergy efficiency decreased from 53.10 % to 48.70 %. System adjustability analysis showed that the system can be stabilized over a 40 %–100 % range of feed fluctuations. This work may provide an optimization strategy for efficient operation and dynamic safety regulation of H<sub>2</sub> production by SCWG technology.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137105"},"PeriodicalIF":9.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270590","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

Discharging via the low-pressure section of the thermal power plant: a new integrated Carnot battery concept and the performance evaluation 火电厂低压段放电：一种新的集成卡诺电池概念及性能评价

IF 9 1区工程技术

Energy Pub Date : 2025-06-13 DOI: 10.1016/j.energy.2025.137079

Chenjie Zhu , Yang Sun , Guangdong Zheng , Dukang Li , Cheng Xu , Ruipeng Wu , Huawei Jiang , Qirong Yang

{"title":"Discharging via the low-pressure section of the thermal power plant: a new integrated Carnot battery concept and the performance evaluation","authors":"Chenjie Zhu , Yang Sun , Guangdong Zheng , Dukang Li , Cheng Xu , Ruipeng Wu , Huawei Jiang , Qirong Yang","doi":"10.1016/j.energy.2025.137079","DOIUrl":"10.1016/j.energy.2025.137079","url":null,"abstract":"<div><div>The inferior discharging performance severely limits the efficiency enhancement of the Carnot batteries using heat pump and organic Rankine cycle (HP-ORC). This work proposed a new Carnot battery concept thermally assisted by thermal power plant, which discharges through the low-pressure section of steam turbine instead of ORC. Its energy-conversion characteristics and operational performance are evaluated based on the typical coal-fired power plant (CFPP) and Carnot battery cases. As the results show: (1) The round-trip efficiency of the proposed system (82.30–133.32%) is significantly higher than the HP-ORC (47.27–64.27%) within similar temperature ranges, attributed to the higher discharge efficiency (19.40%). Thereby, carbon reduction of CFPP and energy storage density are also improved. (2) The energy-level promotion of the discharging working fluids is the thermodynamic reason for the better discharging performance, affected by the redistribution of steam fluxes in turbine and the pressure ratio variation of each turbine-stage group. (3) The key constraints are identified to determine the operating scenarios for variable boundary conditions. (4) Improving the hot-tank temperature can almost promote all the performance indicators, different from the dilemma of HP-ORC between efficiency and other indicators; besides, the proposed concept is more suitable for the power plants not capable of extremely-low-load operation.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":""},"PeriodicalIF":9.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270553","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

Investigation on formation, evolution, and performance impact of mixing layer in the zeotropic mixture ejector 共沸混合气喷射器中混合层的形成、演化及性能影响研究

IF 9 1区工程技术

Energy Pub Date : 2025-06-13 DOI: 10.1016/j.energy.2025.137090

Yingying Tan , Kai Zhang , Lin Wang , Xiaoyang Li , Chuang Wen

{"title":"Investigation on formation, evolution, and performance impact of mixing layer in the zeotropic mixture ejector","authors":"Yingying Tan , Kai Zhang , Lin Wang , Xiaoyang Li , Chuang Wen","doi":"10.1016/j.energy.2025.137090","DOIUrl":"10.1016/j.energy.2025.137090","url":null,"abstract":"<div><div>This study investigates the fluid mixing mechanisms in zeotropic mixture ejectors, which are critical for enhancing the performance of ejector-based refrigeration cycles. A fluid dynamic model of an R245fa/R32 ejector is developed from the perspective of mixing layer evolution and validated against experimental data. The initiation and development of the mixing layer are analyzed under both subcritical and critical operating conditions, focusing on key characteristics such as the growth of the mixing boundary layer, mixing layer thickness, and non-mixing length. Results reveal that the mixing layer originates at the initial interface between the primary and secondary streams and gradually thickens along the flow direction. Its evolution is significantly affected by the operating mode: subcritical conditions lead to pronounced fluctuations in mixing layer thickness, whereas critical conditions maintain greater stability. Furthermore, the R245fa mass fraction influences the development of the mixing layer, which shows two distinct growth stages. Lower R245fa mass fraction slows the growth rate, while a more stable mixing boundary layer and an extended initial growth phase contribute to enhanced entrainment performance. This work establishes a systematic relationship between mixing layer evolution and ejector efficiency, offering a theoretical foundation for the design and optimization of zeotropic mixture ejectors.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137090"},"PeriodicalIF":9.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270598","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 study of heat transfer performance in a novel stacked granule flow heat exchanger: Strengthening mechanism based on multi-parameter coupling 新型层叠式颗粒流换热器换热性能实验研究：基于多参数耦合的强化机制

IF 9 1区工程技术

Energy Pub Date : 2025-06-12 DOI: 10.1016/j.energy.2025.137087

Yuqiu Zhang , Shuyu Huo , Zehong Gu , Haibo Gao , Yongqi Liu , Peibin Zhang , Zixian Gong , Zhuanghe Li , Yanxia Wang

{"title":"Experimental study of heat transfer performance in a novel stacked granule flow heat exchanger: Strengthening mechanism based on multi-parameter coupling","authors":"Yuqiu Zhang , Shuyu Huo , Zehong Gu , Haibo Gao , Yongqi Liu , Peibin Zhang , Zixian Gong , Zhuanghe Li , Yanxia Wang","doi":"10.1016/j.energy.2025.137087","DOIUrl":"10.1016/j.energy.2025.137087","url":null,"abstract":"<div><div>This paper investigates the impacts of granule initial temperature, velocity, diameter, and cooling water flow rate on thermal performance via a novel experimental packed-bed system. Results indicate that higher initial temperatures and flow velocity enhance heat transfer, increasing outlet water temperature, heat flow rate, temperature drop rate, and heat transfer coefficients. Granule size is a dominant factor affecting heat transfer. Larger granules have a smaller specific surface area and a poorer heat transfer effect. Granule diameter increasing from 1 × 10<sup>−3</sup> m to 9 × 10<sup>−3</sup> m reduces outlet temperature by 50.22 % (353 - 313 K), heat flow rate by 79.89 % (5494 - 1105 W), and heat transfer coefficient by 83.61 % (114.54–18.77 W/(m<sup>2</sup>·K)). Regarding the cooling water flow rate, as it ascends from 1.5 × 10<sup>−5</sup> m<sup>3</sup>/s to 3.5 × 10<sup>−5</sup> m<sup>3</sup>/s, the heat flow rate and the heat transfer coefficient first rise and then decrease. Their peak values are achieved at 2.5 × 10<sup>−5</sup> m<sup>3</sup>/s, with the heat flow rate being 4497.84 W and the heat transfer coefficient being 83.68 W/(m<sup>2</sup>·K), respectively. The correction coefficients of temperature and water flow rate were introduced to obtain a prediction correlation for the comprehensive heat transfer coefficient. Its average relative error with experimental values is 6.81 %, showing it can accurately predict the coefficient.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137087"},"PeriodicalIF":9.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270586","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

Numerical simulation of a center-water two-phase ejector with non-condensable gas 不凝性气体中心-水两相喷射器的数值模拟

IF 9 1区工程技术

Energy Pub Date : 2025-06-12 DOI: 10.1016/j.energy.2025.137080

Xuewen Cao , Meiqin Dong , Jiang Bian

{"title":"Numerical simulation of a center-water two-phase ejector with non-condensable gas","authors":"Xuewen Cao , Meiqin Dong , Jiang Bian","doi":"10.1016/j.energy.2025.137080","DOIUrl":"10.1016/j.energy.2025.137080","url":null,"abstract":"<div><div>The application of gas-liquid ejectors can effectively improve system performance while achieving steam condensation and non-condensable gas dissolution and discharge. In the presence of non-condensable gases, the flow field and performance of the ejector are significantly affected. This paper employs the two-phase Eulerian model, with water as primary flow and steam and air as secondary flows. The effects of non-condensable gas on a water-centered two-phase ejector were comprehensively investigated. The results show that as the backpressure increases, the steam wing gradually retreats upstream, and the pressure within the mixing chamber increases. Increasing the primary flow inlet pressure causes the flow inside the ejector to transition from subsonic to supersonic. The impact of the non-condensable gas content is primarily concentrated in the mixing chamber. As the non-condensable gas content increases, the pressure in the mixing chamber increases, the velocity decreases, the axial liquid volume fraction increases, and the ejector's injection capability decreases. When the inlet pressure is 1.60 MPa, increasing the non-condensable gas content from 1 % to 15 % leads to a reduction in the entrainment ratio from 2.13 % to 2.01 %, a decrease of 5.6 %. The influence of non-condensable gas content on the ejector is more pronounced at low inlet pressures.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137080"},"PeriodicalIF":9.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270588","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

Advance on combustion-driven free piston Stirling generator with helical tube heat exchanger 螺旋管换热器燃烧驱动自由活塞斯特林发电机的研究进展

IF 9 1区工程技术

Energy Pub Date : 2025-06-11 DOI: 10.1016/j.energy.2025.136939

Wang Xiao , Haojie Sun , Hangyu Ma , Guoyao Yu , Weijie Zhao , Ercang Luo

{"title":"Advance on combustion-driven free piston Stirling generator with helical tube heat exchanger","authors":"Wang Xiao , Haojie Sun , Hangyu Ma , Guoyao Yu , Weijie Zhao , Ercang Luo","doi":"10.1016/j.energy.2025.136939","DOIUrl":"10.1016/j.energy.2025.136939","url":null,"abstract":"<div><div>Recent years witness dire need of high-performance portable power supplies due to harsh environment and thriving of outdoor recreation. Free-Piston Stirling Generator (FPSG) featuring in compact size, high theoretical efficiency, and multi-heat-source adaptivity, presents as a good candidate. The research proposes an innovative design of a helical-tube bundle heat exchanger, for the sake of a better coupling with a porous media evaporative combustor (PMEC). A balance between lightweight design and thermal efficiency has been achieved through thermoacoustics-based nodal analysis, on operating frequency and hot-end heat exchanger. Further investigation using three-dimensional numerical simulations of combustion-coupled oscillatory flow revealed significant three-dimensional loss features that were underestimated in the quasi-one-dimensional computations. The experiments demonstrated a well improved stand-alone specific power of 112 W/kg for the FPSG, and a maximum fuel-to-electric efficiency of 13.9 %, compared with 66.7 W/kg and 11.98 %, respectively, in our previous work. This study provides valuable insights into addressing the challenges of low efficiency in small-scale FPSGs operating at high frequencies, offering guidance for future improvements in portable power solutions.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 136939"},"PeriodicalIF":9.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261708","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

Thermomechanical response characteristics of full-scale prestressed high-strength concrete energy pile under the flexible constraint of cushion layer 软垫层柔性约束下全尺寸预应力高强混凝土能量桩的热力响应特性

IF 9 1区工程技术

Energy Pub Date : 2025-06-11 DOI: 10.1016/j.energy.2025.137070

Honglin Chang , Gangqiang Kong , Guangchao Sun , Chenglong Wang , Yang Zhou , Qing Yang

{"title":"Thermomechanical response characteristics of full-scale prestressed high-strength concrete energy pile under the flexible constraint of cushion layer","authors":"Honglin Chang , Gangqiang Kong , Guangchao Sun , Chenglong Wang , Yang Zhou , Qing Yang","doi":"10.1016/j.energy.2025.137070","DOIUrl":"10.1016/j.energy.2025.137070","url":null,"abstract":"<div><div>Energy piles serve a dual function of harnessing geothermal energy and supporting structural loads. Existing studies of energy piles mainly focus on free pile heads or rigid pile-raft connections, with limited attention to flexible cushion connections. The study analyzed the heat exchange performance and structural response of a prestressed high-strength concrete (PHC) energy pile whose pile head was flexibly constrained by a cushion layer in an existing building under continuous heating mode through field tests and numerical investigations. In addition, numerical simulations were conducted to analyze cooling conditions, and the effect of soil thermal expansion coefficient and cushion layer strength on the thermomechanical characteristics of the energy pile was considered. The results showed that the PHC energy pile experienced significant additional compressive or tensile stress after heating or cooling, resulting in overall compression or tension of the pile and a downward shift of the neutral point. The pile-soil axial stress ratio increased with the rise in pile temperature and decreased with the reduction in pile temperature. The constraint level at the pile head under the connection form of the cushion layer was between the free pile head and the pile-raft constraint. The variation in the soil thermal expansion coefficient did not cause a significant change in the constraint of the pile. Increasing the strength of the cushion layer to a certain extent increased the constraint stress of the pile, but the effect gradually weakened along the pile depth.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137070"},"PeriodicalIF":9.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270596","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

Preparation and characterization of Juglans regia shell-based nanofluid for enhanced cooling in polymer electrolyte membrane fuel cells 用于聚合物电解质膜燃料电池增强冷却的核桃壳基纳米流体的制备与表征

IF 9 1区工程技术

Energy Pub Date : 2025-06-11 DOI: 10.1016/j.energy.2025.137086

Abdul Raguman, Praveena Vedagiri

{"title":"Preparation and characterization of Juglans regia shell-based nanofluid for enhanced cooling in polymer electrolyte membrane fuel cells","authors":"Abdul Raguman, Praveena Vedagiri","doi":"10.1016/j.energy.2025.137086","DOIUrl":"10.1016/j.energy.2025.137086","url":null,"abstract":"<div><div>Proton Exchange Membrane Fuel Cells (PEMFCs) encounter tremendous thermal management issues owing to the poor heat dissipation capability of traditional coolants such as water and ethylene glycol. These cause dehydration of the membrane, overheating, and loss of system efficiency. To overcome this, bio-based nanofluids of Juglans regia shell (JRS), a readily available carbon-rich agricultural waste, were synthesized and dispersed in 70:30 water:ethylene glycol (W:EG) base fluid at 0.1, 0.3, and 0.5 vol% concentrations. At 0.5 vol%, the JRS nanofluid improved the thermal conductivity by around 11 % (up to 0.468 W/m·K) and retained electrical conductivity at lower values (29.43 μS/cm) in contrast to metal-based counterparts, minimizing the possibility of electrical interference in PEMFCs. Viscosity was moderately improved to 3.41 mPa s at 70 °C, while specific heat was retained at the same value as the base fluid (3.351 kJ/kg·K). Sedimentation tests demonstrated good dispersion stability up to 15 days without the need for surfactants. This research proposes the potential of JRS-based nanofluids as a green, cost-effective coolant, consistent with the principles of circular economy, while providing better thermal performance and system compatibility for PEMFC applications.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137086"},"PeriodicalIF":9.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261860","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 comprehensive feasibility evaluation of hydrogen-carbon-salt cavern-renewable energy (HCSR) system 氢-碳-盐洞穴-可再生能源（HCSR）系统综合可行性评价

IF 9 1区工程技术

Energy Pub Date : 2025-06-11 DOI: 10.1016/j.energy.2025.137040

Xinxing Wei , Xilin Shi , Hongling Ma , Shengnan Ban

{"title":"A comprehensive feasibility evaluation of hydrogen-carbon-salt cavern-renewable energy (HCSR) system","authors":"Xinxing Wei , Xilin Shi , Hongling Ma , Shengnan Ban","doi":"10.1016/j.energy.2025.137040","DOIUrl":"10.1016/j.energy.2025.137040","url":null,"abstract":"<div><div>Renewable energy utilization, hydrogen energy development, and carbon emissions reduction are crucial methods to build a green and clean society. However, the problems with the large scale of energy utilization and storage efficiency restrict the growth of the above methods. To solve these problems, a hydrogen-carbon-salt cavern-renewable energy (HCSR) system that produces and stores the CH<sub>4</sub>, CH<sub>3</sub>OH, CO, and petrol was proposed based on the principle of power to gas (PtG). To analyze the feasibility of the HCSR system, a comprehensive evaluation system that includes three evaluation models (economy model, geological stability, and environment model) was built. The application prospect, energy conversion, system sensitivity, and system limitations were discussed. The study showed that the HCSR system (power to petrol) can save <span><math><mrow><mn>1.68</mn><mo>×</mo><msup><mn>10</mn><mn>10</mn></msup><mspace></mspace><mtext>dollars</mtext></mrow></math></span> and <span><math><mrow><mn>1.79</mn><mo>×</mo><msup><mn>10</mn><mn>10</mn></msup></mrow></math></span> dollars compared to the surface storage tanks and rock cavern storage in 2024, and the economy of the HCSR system was greater than other traditional systems. The maximum displacement, effective strain, and dilatancy of the salt cavern energy storage (SCES) in salt caverns with interlayers were 4.5 m, 0.18 , and 0.4 , respectively, and these parameters satisfy the stability criteria. The maximum environmental parameters of the HCSR system were the zero-carbon circulation and utilization of renewable energy, which account for 43.06 % and 23.12 %. Geological stability was the most sensitive parameter (54.13 %) in the HCSR system. The system will contribute to the development of zero-carbon circulation and energy transition.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 137040"},"PeriodicalIF":9.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270592","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

Capacity credit assessment of regional renewable generation considering multi-time-scale forecast errors 考虑多时间尺度预测误差的区域可再生能源发电容量信用评估

IF 9 1区工程技术

Energy Pub Date : 2025-06-11 DOI: 10.1016/j.energy.2025.136806

Renshun Wang , Yuchen Xie , Shilong Wang , Guangchao Geng , Quanyuan Jiang , Chun Liu , Bo Wang

{"title":"Capacity credit assessment of regional renewable generation considering multi-time-scale forecast errors","authors":"Renshun Wang , Yuchen Xie , Shilong Wang , Guangchao Geng , Quanyuan Jiang , Chun Liu , Bo Wang","doi":"10.1016/j.energy.2025.136806","DOIUrl":"10.1016/j.energy.2025.136806","url":null,"abstract":"<div><div>The temporal variability and forecast uncertainty of renewable energy pose great challenges to supply–demand balance in power systems. Long-term forecasting is crucial for improving renewable integration and ensuring safe operation during extreme weather events. However, existing methods for capacity credit (CC) assessment of renewable primarily focus on annual timescale, which may fail to capture the impact of multi-time-scale forecast errors on power supply. This paper proposes a method to characterize multi-time-scale forecast errors using multivariate kernel density estimation based on wavelet packet decomposition, and then establishes a continuous multi-state model of renewable to quantify forecast uncertainty. Subsequently, a CC assessment framework for regional renewable is developed incorporating multi-time-scale forecast errors. The impact of multi-time-scale forecast errors on the CC of renewable is investigated through the RTS-GMLC system and a Chinese provincial system. The results indicate that the proposed method enables accurate assessment of the power supply capability of renewable during cold wave weather events, facilitating effective anticipation of operational risks and supporting the dispatch of power systems with high renewable penetration.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"331 ","pages":"Article 136806"},"PeriodicalIF":9.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270591","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