Renewable Energy最新文献_第7页

Power system transition pathways in mega-cities under the “Dual Carbon” targets: A multi-temporal case study of Beijing in China “双碳”目标下特大城市电力系统转型路径研究——以北京为例

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-06 DOI: 10.1016/j.renene.2026.125221

Ren Huang , Peng Wang , Sufang Zhang , Zhongrui Ren , Lei Pu

As carbon neutrality goals accelerate, the interplay between urban carbon reduction planning and power system transition is growing increasingly synergistic. Beijing, as China's capital with substantial power consumption and carbon emissions, presents a critical case for studying power transition. Using the LEAP-PYPSA-BJ model, this study analyzes Beijing's power system transition pathways under the carbon-neutral objective, considering renewable energy output characteristics and power grid constrains. Results indicate that achieving natural carbon neutrality in Beijing by 2060 remains challenging. To sustain a downward trajectory in emissions and address potential extreme weather events, electrification must be planned prudently in light of low-carbon power availability. On the supply side, wind and solar power are set to become key pillars of Beijing's electricity mix by 2060, with projected installed capacity ranging from 26.02 to 33.13 GW for wind and 60.97–83.15 GW for solar PV. However, the expansion of local renewable capacity must be coupled with enhanced development of imported green electricity and the corresponding transmission lines, with projections indicating that the actual capacity requirement for these imported power transmission lines could reach up to 35 GW by 2060. In addition, power planning must consider the spatial and temporal distribution of local power sources in Beijing, as well as ensuring sufficient local grid capacity is available. As load growth continues and the power supply becomes increasingly decarbonized, there is a pressing need for capacity expansion in much of the local transmission lines. During extreme weather events, specific local transmission lines may require capacity upgrades of up to 4.52 GW. A strategic focus will be essential in key load centers such as Haidian, Chaoyang, Lize, CBD, and Yizhuang. Based on these findings, policy recommendations are proposed.

随着碳中和目标的加快，城市碳减排规划与电力系统转型之间的相互作用日益增强。北京作为中国电力消费和碳排放较大的首都，是研究电力转型的重要案例。本文采用LEAP-PYPSA-BJ模型，在考虑可再生能源输出特性和电网约束的情况下，分析了碳中和目标下北京市电力系统的转型路径。结果表明，到2060年实现北京的自然碳中和仍然具有挑战性。为了保持排放量的下降轨迹并应对潜在的极端天气事件，必须根据低碳电力的可用性谨慎规划电气化。在供应方面，到2060年，风能和太阳能将成为北京电力结构的主要支柱，预计风电装机容量为26.02至33.13吉瓦，太阳能光伏装机容量为60.97至83.15吉瓦。然而，本地可再生能源容量的扩大必须与进口绿色电力和相应输电线路的加强发展相结合，预测表明，到2060年，这些进口输电线路的实际容量需求可能高达35吉瓦。此外，电力规划必须考虑北京本地电源的时空分布，并确保本地电网有足够的容量。随着负荷的持续增长和电力供应的日益脱碳，许多地方输电线路迫切需要扩大容量。在极端天气事件期间，特定的本地输电线路可能需要升级高达4.52吉瓦的容量。重点布局海淀、朝阳、丽泽、CBD、亦庄等重点负荷中心。根据这些发现，提出了政策建议。

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引用次数: 0

Investigation into the pyrolysis behavior of chestnut shells employing Gaussian deconvolution technique 利用高斯反卷积技术研究栗子壳的热解行为

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-06 DOI: 10.1016/j.renene.2026.125215

Jialiu Lei, Zhe Xu, Wenfeng Dai, Yongjun Fu, Yucheng Zhang

Due to the inherent complexity of biomass composition, its pyrolysis process is typically accompanied by multiple concurrent reactions. To elucidate the pyrolysis behavior of biomass and furnish scientific guidance for its efficient utilization, an extensive examination of the pyrolysis characteristics of chestnut shells over a temperature span from 303 K to 1173 K under a nitrogen atmosphere at different heating rates was conducted in the present research. By employing Gaussian deconvolution, the pyrolysis curve of chestnut shells was divided into pseudo-hemicellulose, pseudo-cellulose, and pseudo-lignin. For each of these components, the kinetic parameters have undergone validity verification via multiple model-free methods. The analysis indicated that the mean activation energy values generally followed the sequence of pseudo-lignin > pseudo-cellulose > pseudo-hemicellulose. The pyrolysis reaction mechanisms were further identified through the Coats-Redfern method. Results indicated that the chemical reaction order model (F₃) predominantly describes the pyrolysis behavior of pseudo-hemicellulose, whereas the diffusion-controlled model (D₃) is mainly associated with the pyrolysis of pseudo-cellulose. For pseudo-lignin, the primary reaction mechanism corresponds to random nucleation (A_1/4). Additionally, thermodynamic parameters for the three pseudo-components were calculated, along with the kinetic compensation effect. Thermodynamic evaluation verified that the decomposition of chestnut shells was an endothermic and non-spontaneous process, which could be effectively converted into a value-added energy source through pyrolysis. The approach proposed in this study provides a reliable method for interpreting experimental data independent of pyrolysis behavior, which not only offers meaningful insights for the efficient resource utilization of chestnut shells but also serves as a valuable reference for optimizing the resource recovery of other lignocellulosic biomass with analogous structural and compositional properties.

由于生物质组成固有的复杂性，其热解过程通常伴随着多个同时发生的反应。为了阐明生物质的热解行为，为其高效利用提供科学指导，本研究对板栗壳在氮气气氛下，以不同升温速率在303 ~ 1173 K温度范围内的热解特性进行了广泛的研究。采用高斯反褶积法将栗子壳热解曲线划分为伪半纤维素、伪纤维素和伪木质素。对于每个组件，动力学参数都通过多种无模型方法进行了有效性验证。分析表明，平均活化能值大体上遵循伪木质素>；伪纤维素>；伪半纤维素的顺序。通过Coats-Redfern法进一步确定了热解反应机理。结果表明，化学反应顺序模型（F3）主要描述了伪半纤维素的热解行为，而扩散控制模型（D3）主要描述了伪纤维素的热解行为。伪木质素的主要反应机制为随机成核（A1/4）。此外，还计算了三种伪组分的热力学参数，以及动力学补偿效应。热力学评价证实，板栗壳的分解是一个吸热的非自发过程，可以通过热解有效地转化为增值能源。本研究提出的方法提供了一种独立于热解行为的可靠方法来解释实验数据，不仅为板栗壳的有效资源利用提供了有意义的见解，而且为优化具有类似结构和组成性质的其他木质纤维素生物质的资源回收提供了有价值的参考。

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引用次数: 0

Hydrogen fuel cell-inverter system for grid-connected applications: LCL filter design and optimized control strategies for power quality and standard compliance 并网应用的氢燃料电池逆变器系统：LCL滤波器设计和优化控制策略，以满足电能质量和标准的要求

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-06 DOI: 10.1016/j.renene.2026.125222

Kotb B. Tawfiq , Hatem Zeineldin , Ahmed Al-Durra , Ehab F. El-Saadany

This paper presents a hydrogen fuel cell-based inverter system designed for transformer-less grid-connected applications, emphasizing hydrogen as a sustainable energy source for decarbonizing power systems. The proposed system integrates advanced control strategies to mitigate grid-side harmonic distortion, leakage current, and common-mode voltage, ensuring compliance with international power quality standards. DC-link voltage regulation is precisely maintained, and the LCL filter is carefully optimized and designed to significantly improve dynamic performance and system stability. At a DC-link voltage of 300V, the system achieves a leakage current of 135.3 mA, significantly lower than the 225.5 mA observed with conventional methods, and well within the IEC standard threshold. It also reduces grid current total harmonic distortion to 1.84 %, compared to 2.81 % in conventional methods. Simulation and experimental results validate the system's suitability for transformer-less grid-connected applications, offering enhanced reliability and efficiency. By integrating hydrogen fuel cells with advanced inverter technologies, this work demonstrates the potential of hydrogen as a key enabler for clean energy systems, addressing the growing demand for sustainable and grid-compliant power solutions.

本文提出了一种基于氢燃料电池的逆变器系统，该系统设计用于无变压器并网应用，强调氢作为脱碳电力系统的可持续能源。该系统集成了先进的控制策略，以减轻电网侧谐波失真、漏电流和共模电压，确保符合国际电力质量标准。精确地保持直流链路电压调节，LCL滤波器经过精心优化和设计，显着提高动态性能和系统稳定性。在直流电压为300V时，系统的漏电流为135.3 mA，明显低于传统方法观察到的225.5 mA，并且完全在IEC标准阈值之内。它还将电网电流总谐波失真降低到1.84%，而传统方法的总谐波失真为2.81%。仿真和实验结果验证了该系统适用于无变压器并网应用，提供了更高的可靠性和效率。通过将氢燃料电池与先进的逆变器技术相结合，这项工作展示了氢作为清洁能源系统关键推动者的潜力，解决了对可持续和电网兼容的电力解决方案日益增长的需求。

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引用次数: 0

Experimental assessment of hybrid battery temperature regulation strategy via integration of binary nano-enhanced phase change material composite with helical fluid flow skeletons 基于二元纳米增强相变材料复合材料与螺旋流体流动骨架集成的混合动力电池温度调节策略实验评估

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-06 DOI: 10.1016/j.renene.2026.125226

Ankur Dwivedi, Varun Goel, Anoop Kumar

The continuously escalating global demand for lithium-ion battery-based electric vehicles has stimulated the scientific efforts to ensure their efficient and extended operational performances alongside limiting several practical safety concerns. The hybrid temperature control strategies integrating nano-enhanced phase change materials with liquid flow channels have been emerged as well-researched and extensively adopted method synergizing the advantages of both strategies along with overcoming their individual limitations. In this work, an innovative nano-enhanced phase change materials-embedded helical fluid flow skeleton-assisted battery temperature control system was analyzed experimentally to examine the effects of variations in discharge rate and heat transfer fluid inflow temperature as performance parameters during operations at different ambient temperature conditions. The binary mixture of multi-walled carbon nanotubes and graphene nanoparticles (in 3:7 mass ratio) was used to improve thermal characteristics of base phase change material. The analysis outcomes confirmed the superior thermal performance of phase change material-integrated hybrid structure exhibiting the synergistic thermal enhancement effects with maximum average temperature drops of 52.43 % and 50.76 % relative to bare test configurations for 22 °C and 34 °C ambient conditions, respectively; along with maximum thermal difference of 3.92 °C across the module. Additionally, two empirical correlations predicting system performance were proposed and validated with corresponding experimental outcomes.

全球对锂离子电池电动汽车的需求不断增长，这刺激了科学研究，以确保其高效和延长的运行性能，同时限制了一些实际的安全问题。将纳米增强相变材料与液体流动通道相结合的混合温度控制策略是一种克服各自局限性，同时又能将两者的优点协同起来的方法，已经得到了广泛的应用。在这项工作中，实验分析了一种创新的纳米增强相变材料嵌入螺旋流体流动骨架辅助电池温度控制系统，以研究在不同环境温度条件下，放电速率和传热流体流入温度作为性能参数的变化对电池温度控制系统的影响。采用多壁碳纳米管与纳米石墨烯的二元混合物（质量比为3:7）改善基相变材料的热性能。分析结果表明，相变材料-集成杂化结构具有较好的热性能，在22°C和34°C环境条件下，相变材料-集成杂化结构的热增强效应显著，相对于裸测试构型，其最大平均降温幅度分别为52.43%和50.76%；整个模块的最大温差为3.92°C。此外，提出了两个预测系统性能的经验关联，并通过相应的实验结果进行了验证。

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引用次数: 0

Performance analysis of a solar-driven hollow fiber membrane-based liquid desiccant air-conditioning system in a hot-humid region 湿热地区太阳能驱动中空纤维膜液体干燥剂空调系统性能分析

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-06 DOI: 10.1016/j.renene.2026.125190

Xuan Pan , Ao Liu , Jia-Hui Li , Chun-Li Yang , Cai-Hang Liang , Nan-Feng Li , Yan-fang Dong , Chuan-Shuai Dong , Yun-sheng Zhao

In recent years, due to high temperatures and humidity, coastal areas often fail to meet thermal comfort standards. To address this issue, the performance feasibility of solar-driven hollow fiber membrane-based liquid desiccant air-conditioning (SHFM-LDAC) system in hot-humid climates is investigated. A TRNSYS numerical simulation model for the SHFM-LDAC system is developed. Furthermore, this study systematically explores the underlying thermodynamic and transport mechanisms of three performance indices: dehumidification efficiency (ε_de), coefficient of performance (COP), and dehumidification for specific electric energy consumption (DSEC), and reveals strongly coupled effects among operating parameters (air flowrate, solution flowrate, hot water temperature, and cooling water temperature) under varying temperature and humidity conditions. Results demonstrate that: ε_de is primarily influenced by air-side transport limitations and strongly enhanced by low air temperature combined with moderate flow rate. COP is governed by energy input and air latent load, showing significant improvement under low solution flow rate and high inlet humidity conditions. DSEC presents complex nonlinear behavior. Its optimal performance emerges only within well-defined operating regions, particularly when air-side and cooling-side parameters are jointly optimized. These findings provide valuable insights for SHFM-LDAC system energy consumption optimization and intelligent real-time control strategies in hot and humid climates.

近年来，由于高温高湿，沿海地区往往达不到热舒适标准。为了解决这一问题，研究了太阳能驱动中空纤维膜基液体干燥剂空调（SHFM-LDAC）系统在湿热气候下的性能可行性。建立了SHFM-LDAC系统的TRNSYS数值仿真模型。此外，本研究系统探讨了除湿效率（εde）、性能系数（COP）和除湿比电能消耗（DSEC）三个性能指标的热力学和传递机制，揭示了不同温度和湿度条件下运行参数（空气流量、溶液流量、热水温度和冷却水温度）之间的强耦合效应。结果表明：εde主要受空气侧输运限制的影响，低温和中等流量对εde的影响较大；COP受能量输入和空气潜负荷的控制，在低溶液流量和高入口湿度条件下，COP有显著改善。DSEC具有复杂的非线性行为。它的最佳性能只有在明确的操作区域内才会出现，特别是当空气侧和冷却侧参数共同优化时。这些研究结果为湿热气候条件下SHFM-LDAC系统能耗优化和智能实时控制策略提供了有价值的见解。

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引用次数: 0

Response surface method to optimize bio-oil yield and hydroxyl number from pine pyrolysis using a bubbling fluidized bed reactor 响应面法优化松木鼓泡流化床热解生物油收率和羟基数

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-05 DOI: 10.1016/j.renene.2026.125208

Manish Sakhakarmy , Jake Gaertner , Peerawat Wongsurakul , Pavlo Ivanchenko , Deb P. Jaisi , Mohamed Ammar , Jonas Baltrusaitis , Sushil Adhikari

Pyrolysis, a thermochemical conversion method, produces bio-oil, which could be used for resin and bio-fuel synthesis. Despite numerous pyrolysis studies to maximize the bio-oil yield, there is a research gap in optimizing the pyrolysis reactor for both bio-oil yield and hydroxyl group concentration. This study aimed to optimize the pyrolysis operating parameters (pyrolysis temperature, biomass feed rate, and bed height-to-diameter ratio) to maximize the bio-oil yield and hydroxyl group concentration. The Box-Behnken method was used to design the pyrolysis experiments for a laboratory-scale fluidized bed pyrolysis unit. The yield and hydroxyl concentration results were analyzed using the response surface method, which suggested that feed rate (p-value = 0.005) and the square of temperature (p-value = 0.028) significantly affected the bio-oil yield. On the other hand, pyrolysis temperature (p-value = 0.01) and the interaction between feed rate and bed height-to-diameter ratio (p-value = 0.043) were significant parameters for bio-oil hydroxyl concentration. Furthermore, ex-situ catalytic pyrolysis in the presence of Cu/Al₂O₃ obtained using the optimum pyrolysis conditions led to the catalytic cracking of the sugars and alkoxy phenols in the pyrolysis vapor. Catalytic pyrolysis reduced the water content of the bio-oil from 13.4 to 8.0 % and increased the amount of carbon (from 65.7 to 69.3 %), alkyl phenol (from 7.7 to 22.5 area %), and hydrocarbons (from 1.6 to 11.3 %) in the bio-oil, which were attributed to the deoxygenation and alkylation reactions. Based on the experimental results, it can be concluded that high-temperature pyrolysis is favorable for obtaining bio-oil with higher hydroxyl concentration for resin synthesis application.

热解是一种热化学转化方法，可生产生物油，生物油可用于树脂和生物燃料合成。为了最大限度地提高生物油收率而进行了大量的热解研究，但在同时优化生物油收率和羟基浓度的热解反应器方面还存在研究空白。本研究旨在优化热解操作参数（热解温度、生物质进料速率和床层高径比），以最大限度地提高生物油收率和羟基浓度。采用Box-Behnken方法对实验室规模的流化床热解装置进行了热解实验设计。结果表明，进料速率（p值= 0.005）和温度的平方（p值= 0.028）显著影响生物油的收率和羟基浓度。另一方面，热解温度（p值= 0.01）和进料速率与床层高径比的交互作用（p值= 0.043）是影响生物油羟基浓度的重要参数。此外，在Cu/Al2O3存在下，采用最佳热解条件进行非原位催化热解，热解蒸汽中的糖和烷氧酚被催化裂解。催化热解使生物油的含水量从13.4%降低到8.0%，碳（从65.7%增加到69.3%）、烷基酚（从7.7增加到22.5）和烃类（从1.6增加到11.3%）的含量增加，这是脱氧和烷基化反应的结果。实验结果表明，高温热解有利于获得较高羟基浓度的生物油用于树脂合成。

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引用次数: 0

Harnessing solar mini-grid surplus with green finance and vertical economic integration for low-carbon hydrogen and electric mobility 利用太阳能微型电网盈余与绿色金融和垂直经济一体化，实现低碳氢和电动交通

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-05 DOI: 10.1016/j.renene.2026.125205

Wei Chen , Liu Yan

An extensive disintegration exists in transferring renewable energy resources between China and developing sub-Saharan countries. This led to the problem of scarcity of electricity mobility and low-carbon hydrogen integration, enhancing solar mini-grid supply surplus. In addition, such disintegration is hindered by vertical economic integration between China and sub-Saharan countries. Keeping that in view, the purpose of the study is to evaluate the solar mini-grid surplus supply with green finance and vertical economic integration for renewable electricity mobility and low-carbon hydrogen in China and developing African countries. The empirical data is gathered from 1990 to 2024, and multiple advanced empirical assessment techniques, including split analysis, cross-sectional dependence test, cointegration analysis, Phillips-Ouliaris test, GARCH-based analysis technique, and sensitivity analysis. The findings illustrate that solar mini-grids in China create a substantial surplus that is monetised by using green-financed instruments, creating a new source of revenue that can be used to electrify rural areas with vertical integration of renewable electric power in the supply chain, with the electricity-mobility infrastructure and low-carbon hydrogen generation. Mini-grid models of this nature, backed by global green-bond markets, have been designed to be scalable, thus improving the local access to energy, as well as providing the region with hydrogen hubs.

中国与撒哈拉以南发展中国家的可再生能源资源转移存在广泛的分化。这导致了电力流动性和低碳氢整合的稀缺问题，增强了太阳能微电网的供应过剩。此外，中国与撒哈拉以南国家之间的垂直经济一体化阻碍了这种解体。考虑到这一点，本研究的目的是评估中国和非洲发展中国家在绿色金融和垂直经济一体化下的太阳能微电网剩余供应，以实现可再生电力流动和低碳氢。采用分裂分析、横截面相关性检验、协整分析、philips - ouliaris检验、基于garch的分析技术、敏感性分析等先进的实证评价技术，收集1990 - 2024年的实证数据。研究结果表明，中国的太阳能微型电网创造了大量盈余，通过使用绿色融资工具将其货币化，创造了新的收入来源，可用于通过供应链中可再生电力的垂直整合，与电力移动基础设施和低碳氢发电相结合，为农村地区供电。在全球绿色债券市场的支持下，这种性质的微型电网模型被设计为可扩展的，从而改善了当地的能源获取，并为该地区提供了氢气中心。

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引用次数: 0

Probabilistic assessment of Spain's 2030 electricity system via Monte Carlo analysis 通过蒙特卡洛分析对西班牙2030年电力系统进行概率评估

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-05 DOI: 10.1016/j.renene.2026.125204

Lucas Álvarez-Piñeiro , César Berna-Escriche , David Blanco-Muelas

As Spain accelerates its transition toward a renewable-based electricity system, the reliability of policy targets set by the National Energy and Climate Plan (PNIEC 2023–2030) must be tested against the reality of generation variability, mainly due to weather condition variability and demand uncertainty. This study presents a comprehensive and probabilistic assessment of Spain's 2030 electricity system, utilizing Monte Carlo Analysis (MCA) in conjunction with the EnergyPLAN simulation tool. Moving beyond traditional deterministic models, 93 synthetic years of hourly demand and energy generation profiles were obtained through a blockbootstrapping technique informed by historical data from 2016 to 2024.

Simulation results highlight substantial variability in system behavior. Surplus energy often exceeds 100 TWh annually, with concentrated excesses during spring and summer. Moreover, the increasing reliance on variable renewable sources gives rise to periods of very low generation, known as Dunkelflauten, and steep evening ramps, highlighting the emergence of pronounced "duck" or "canyon" curves. While Dunkelflauten events are less frequent in Spain than in other parts of Europe, they remain significant during the autumn and winter seasons. In this context, P2G emerges as a technically and strategically relevant option, utilizing hydrogen, which can serve as seasonal storage or facilitate the decarbonization of hard-to-electrify sectors.

随着西班牙加速向可再生电力系统过渡，国家能源和气候计划（PNIEC 2023-2030）设定的政策目标的可靠性必须在发电变化的现实下进行测试，主要是由于天气条件的变化和需求的不确定性。本研究利用蒙特卡罗分析（MCA）和EnergyPLAN仿真工具，对西班牙2030年电力系统进行了全面的概率评估。超越传统的确定性模型，通过区块引导技术获得了从2016年到2024年的历史数据，获得了93年的小时需求和能源生成曲线。模拟结果突出了系统行为的实质性变化。每年的剩余能源通常超过100太瓦时，在春夏季集中过剩。此外，日益增加的对可变可再生能源的依赖导致了极低发电量的时期，即Dunkelflauten，以及陡峭的夜间坡道，突出了明显的“鸭子”或“峡谷”曲线的出现。虽然与欧洲其他地区相比，Dunkelflauten事件在西班牙不那么频繁，但它们在秋冬季节仍然很重要。在这种情况下，P2G成为一种技术和战略上相关的选择，利用氢气，可以作为季节性储存或促进难以电气化的部门的脱碳。

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引用次数: 0

Strategy design and comprehensive performance evaluation of supercritical coal-fired power plants coupled with compressed air energy storage systems for peak-shaving 超临界燃煤电厂与压缩空气储能系统耦合调峰策略设计及综合性能评价

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-05 DOI: 10.1016/j.renene.2026.125207

Qilong Xu , Shuai Wang , Kun Luo , Jianren Fan

The inherent volatility and intermittency of wind and solar energy continue to challenge the stability and reliability of power systems. Consequently, achieving effective peak-shaving for these fluctuating power sources represents a critical challenge for modern power grids. Firstly, this study pioneers a deeply integrated model coupling a 600 MW coal-fired power plant (CFPP) with advanced adiabatic compressed air energy storage (AA-CAES). Secondly, this study designs five energy storage schemes and eight energy release schemes for this integrated peak-shaving system. During energy storage process, Case S1 (discharge to the No. 8 heater) achieves the highest peak-shaving capacity and depth of 28.68 MW and 4.78 %, respectively. During energy release process, Case R4 (discharge to the 4th-section extraction) delivers the highest peak-shaving capacity and depth of 11.22 MW and 1.87 %, respectively. The unit's thermal efficiency is also highest at Case R4, 41.70 %. Moreover, a novel comprehensive evaluation system is constructed to evaluate the performance of different schemes, and the best peak-shaving scheme is determined. Case S5 (to the deaerator) has the highest energy storage score of 0.748; Case R4 has the highest energy release score of 0.776. Finally, through detailed economic analysis, the feasibility of this integrated scheme is further demonstrated. This research significantly enhances the flexibility of CFPPs and provides robust support for transforming China's energy structure.

风能和太阳能固有的波动性和间歇性继续挑战着电力系统的稳定性和可靠性。因此，实现这些波动电源的有效削峰是现代电网面临的一个关键挑战。首先，本研究开创了600兆瓦燃煤电厂（CFPP）与先进绝热压缩空气储能（AA-CAES）耦合的深度集成模型。其次，本研究为该综合调峰系统设计了5个储能方案和8个能量释放方案。蓄能过程中，工况S1（向8号加热器放电）的调峰容量和调峰深度最大，分别为28.68 MW和4.78%。在能量释放过程中，Case R4（放电至第4段抽提）的调峰能力和深度最高，分别为11.22 MW和1.87%。机组的热效率在Case R4也最高，为41.70%。在此基础上，构建了一种新的综合评价体系来评价不同方案的性能，并确定了最佳的调峰方案。工况S5（对除氧器）储能评分最高，为0.748；案例R4的能量释放得分最高，为0.776。最后，通过详细的经济分析，进一步论证了该综合方案的可行性。本研究显著提高了CFPPs的灵活性，为中国能源结构转型提供了有力支持。

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引用次数: 0

Optimizing PEM fuel cell performance with Tesla valve-inspired flow fields featuring embedded island structures 利用嵌入岛状结构的Tesla阀启发流场优化PEM燃料电池性能

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-01-05 DOI: 10.1016/j.renene.2026.125178

Fangfang Xie, Hongzeng Xin, Mingjun Liao

Flow dynamics critically influence the electrochemical efficiency of proton exchange membrane fuel cells (PEMFCs) by governing reactant delivery and byproduct removal. In this study, 6 Tesla valve-inspired flow field configurations are proposed to enhance mass and thermal transport within PEMFCs. A three-dimensional, two-phase, non-isothermal model is developed to evaluate their performance, focusing on current density, oxygen flux, temperature uniformity, and water saturation. Among all designs, the symmetric configuration with embedded floating islands (Case C) exhibits the best performance, achieving a 30.9 % increase in maximum current density compared to conventional straight channels. This enhancement is attributed to periodic acceleration–deceleration patterns that intensify convective transport and suppress local flooding. Parametric studies further reveal that an arc-to-main channel width ratio of 0.5 and an inclination angle of 30° yield the most balanced performance, improving current density by up to 8.6 %. The optimized geometries not only improve oxygen delivery and thermal uniformity but also enhance net power output by mitigating parasitic losses associated with pressure drop. This work establishes a flow-induced transport enhancement framework, offering mechanistic insights into geometric-transport coupling and guiding the design of high-performance PEMFC systems.

流动动力学通过控制反应物的输送和副产物的去除，对质子交换膜燃料电池（pemfc）的电化学效率产生重要影响。在这项研究中，提出了6种特斯拉阀激发的流场配置，以增强pemfc内部的质量和热传递。建立了一个三维、两相、非等温模型来评估它们的性能，重点是电流密度、氧通量、温度均匀性和水饱和度。在所有设计中，嵌入浮动岛的对称配置（案例C）表现出最好的性能，与传统的直通道相比，最大电流密度增加了30.9%。这种增强归因于周期性的加速-减速模式，这种模式加强了对流输送，抑制了局部洪水。参数研究进一步表明，弧与主通道宽度比为0.5和倾角为30°时，性能最平衡，电流密度可提高8.6%。优化的几何结构不仅改善了氧气输送和热均匀性，而且通过减少与压降相关的寄生损失，提高了净功率输出。这项工作建立了一个流动诱导输运增强框架，为几何输运耦合提供了机理见解，并指导了高性能PEMFC系统的设计。

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