IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136108

Xiaoxia Yang , Md. Un Nazmus Sakib Khan , Dian Zhong , Kuo Zeng , Haiping Yang , Hanping Chen

引用次数: 0

Kalman filter-based estimation method for degraded high-pressure common rail system 基于卡尔曼滤波器的降级高压共轨系统估算方法

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136228

Bingxin Liu , Hongzi Fei , Liuping Wang , Xiongqin Li , Zhiguo Yuan , Liyun Fan , Jifang Wang

{"title":"Kalman filter-based estimation method for degraded high-pressure common rail system","authors":"Bingxin Liu , Hongzi Fei , Liuping Wang , Xiongqin Li , Zhiguo Yuan , Liyun Fan , Jifang Wang","doi":"10.1016/j.energy.2025.136228","DOIUrl":"10.1016/j.energy.2025.136228","url":null,"abstract":"<div><div>Fuel injection characteristics are crucial parameters influencing engine performance. Over prolonged operation, components of common rail systems may gradually degrade, leading to abnormal injection performance. Real-time acquisition of injection information is essential for timely optimizing injection strategies. This study presents an adaptive estimation method based on the Kalman filter using rail pressure fluctuations to enable real-time injection perception throughout the lifecycle. A degradation factor is introduced to quantify the impact of structural degradation on injection characteristics. Considering degradation's slow-varying nature, a nonlinear time-varying state-space model is constructed with rail pressure and degradation factor as output variables, ensuring both observability and feasibility. Due to the multi-rate sampling of these outputs, a dual time-scale extended Kalman filter is designed, and a sequential update strategy is incorporated to further reduce complexity by eliminating matrix inversion. Simulations investigate the effects of various degradation modes and levels on injection rate and verify the method's effectiveness. Results show that the proposed method accurately estimates injection rate and injection volume, with estimation errors below 3.5 % and strong adaptability in coupled degradation scenarios. Experimental validation with a different type of injector and rail pipe further confirms the method's generalizability and practical value for real-time monitoring and health assessment.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"325 ","pages":"Article 136228"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848406","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 simulation-based analysis of energy storage's impact on power markets for renewable energy integration 基于仿真的储能对可再生能源整合电力市场影响分析

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136202

Mehmet Emre Ölmez , Ibrahim Ari , Gülfem Tuzkaya

{"title":"A simulation-based analysis of energy storage's impact on power markets for renewable energy integration","authors":"Mehmet Emre Ölmez , Ibrahim Ari , Gülfem Tuzkaya","doi":"10.1016/j.energy.2025.136202","DOIUrl":"10.1016/j.energy.2025.136202","url":null,"abstract":"<div><div>The escalating threat of global warming, attributed to fossil fuel emissions, has spurred global efforts toward ambitious decarbonization initiatives. The transition towards renewable energy sources and the gradual phase-out of fossil fuels introduces complexities, notably the intermittent nature of renewables. Amid this paradigm shift, energy storage technologies increasingly play an essential role. Policymakers face the challenge of comprehensively assessing the potential impacts of these technologies on various facets of the energy system, including market prices, unsatisfied demand, and excess renewable generation. This study addresses this challenge through a simulation approach employing a deterministic discrete model, meticulously examining the 8760 annual hours based on real-world market data trends. The results indicate that the integration of energy storage with renewable power generation increases the reliability of renewables and significantly influences power market prices by acting as a complementary energy source. Insights derived from this simulation-based approach underscore the importance of optimizing storage capacity in tandem with broader renewable expansion strategies. Furthermore, aligning incentives to support these synergetic efforts proves critical. This approach provides essential perspectives and a decision support system for policymakers and researchers, contributing to global initiatives aimed at combating climate change and fostering a smooth transition to a decarbonized future.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"326 ","pages":"Article 136202"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859775","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

Exergy-based economic, environmental, and sustainability analysis of two different biogas-fueled trigeneration proposals for a wastewater treatment plant (WWTP) 污水处理厂（WWTP）两种不同沼气三联发电方案的经济、环境和可持续性分析

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136096

Siamak Mirmasoumi , Rahim Khoshbakhti Saray , Nima Asgari

{"title":"Exergy-based economic, environmental, and sustainability analysis of two different biogas-fueled trigeneration proposals for a wastewater treatment plant (WWTP)","authors":"Siamak Mirmasoumi , Rahim Khoshbakhti Saray , Nima Asgari","doi":"10.1016/j.energy.2025.136096","DOIUrl":"10.1016/j.energy.2025.136096","url":null,"abstract":"<div><div>The objective of this study is to assess the performance of two CCHP systems in wastewater treatment plants (WWTPs): one powered by a micro gas turbine (AD-CCHP-MGT) and the other by an internal combustion engine (AD-CCHP-ICE). The anaerobic digestion (AD) unit of the WWTP provides biogas, which is analyzed through experimental digestion tests. Both the biogas fueled systems use the waste heat for various applications including feedstock pretreatment. The AD condition is thermophilic process (55 °C) with thermal pretreatment at 90 °C for 0.5 h. The results indicate that the self-sufficiency of power for AD-CCHP-ICE system is 43.41 %, whereas it is 30.90 % for AD-CCHP-MGT system. Furthermore, AD-CCHP-ICE system provides low-cost energy products and more electric power output, resulting in a shorter payback period. Additionally, excluding the AD investment cost, the payback period of systems are almost halved. The exergy-based environmental and sustainability analyses indicate that the specific CO<sub>2</sub> emission rate of AD-CCHP-ICE is lower than that of AD-CCHP-MGT. With an environmental improvement index 1.5 times higher, the AD-CCHP-ICE is more environmentally friendly. Moreover, AD-CCHP-ICE demonstrates a larger sustainability index than AD-CCHP-MGT, as the exergy destruction and loss rates differ between the systems, following the same trend.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"326 ","pages":"Article 136096"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864259","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

Carbon-negative power generation using syngas produced from CO2-cofeeding pyrolysis of lignocellulosic biomass 利用木质纤维素生物质共馈热解产生的合成气进行负碳发电

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136215

Taewoo Lee , Sangyoon Lee , Yiu Fai Tsang , Eilhann E. Kwon

{"title":"Carbon-negative power generation using syngas produced from CO2-cofeeding pyrolysis of lignocellulosic biomass","authors":"Taewoo Lee , Sangyoon Lee , Yiu Fai Tsang , Eilhann E. Kwon","doi":"10.1016/j.energy.2025.136215","DOIUrl":"10.1016/j.energy.2025.136215","url":null,"abstract":"<div><div>Lignocellulosic biomass is typically converted into biofuels through selective conversion of saccharides in the biomass, leaving considerable amounts of lignin as waste. Pyrolysis is an alternative solution for efficient feedstock utilization; however, the fuel use of biocrude face challenges due to their compositional heterogeneity. Thus, the pyrolytic conversion of biomass into syngas could be practical for efficient combustion under manageable equivalent ratios. This study focuses on enhancing syngas production from the pyrolysis of lignocellulosic biomass, such as walnut shells (WNSs), while leveraging CO<sub>2</sub> as a partial oxidant. During pyrolysis, CO<sub>2</sub> reacted with WNS-derived volatile compounds, converting them into CO-rich syngas. The CO<sub>2</sub>-driven CO enhancement was observed at ≥ 520 °C, requiring measures to accelerate CO<sub>2</sub> reaction kinetics. Therefore, operational parameters, including test temperature and CO<sub>2</sub> composition, were scrutinized to optimize CO<sub>2</sub> reactivity during catalytic pyrolysis. To assess industrial applicability, the resultant syngas enriched with CO was applied for power generation in a gas-turbine system. Under optimal conditions (80 vol% CO<sub>2</sub> and 700 °C), theoretical calculations enabled to estimate 1882.5 MJ s<sup>−1</sup> of net turbine work and 76.18 % of thermal efficiency, revealing 2.71- and 3.01-fold increases compared to reference natural gases.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"325 ","pages":"Article 136215"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844078","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

Thermo-economic performance assessment of a liquid CO2 energy storage system with different sensible heat storage materials 不同显热材料的液态CO2储能系统热经济性能评价

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136214

Tianyu Deng , Chuang Wu , Weiguo Zhang , Kui Luo

{"title":"Thermo-economic performance assessment of a liquid CO2 energy storage system with different sensible heat storage materials","authors":"Tianyu Deng , Chuang Wu , Weiguo Zhang , Kui Luo","doi":"10.1016/j.energy.2025.136214","DOIUrl":"10.1016/j.energy.2025.136214","url":null,"abstract":"<div><div>Liquid CO<sub>2</sub> energy storage systems offer a promising solution for large-scale energy storage, where the selection of heat storage materials plays a critical role in system performance. This paper investigates the effects of various heat storage materials on the thermo-economic performance of a liquid CO<sub>2</sub> energy storage system, including L-QB300, HITEC molten salt, HITEC XL molten salt, solar salt, Therminol 66, Therminol VP-1, and rapeseed oil. A thermo-economic model is developed, and multi-objective optimization is employed to analyze how these materials affect system performance. The findings indicate optimal configurations for high-pressure tank pressure, low-pressure tank pressure, booster pump pressure rise, and heat storage material split ratio, all of which enhance round-trip efficiency. Specifically, increasing high-pressure tank pressure and throttle valve pressure drop improves energy storage density, while elevated low-pressure tank pressure has a reducing effect. An optimal heat storage material split ratio also maximizes energy storage density. Additionally, configurations that minimize the levelized cost of electricity are identified for high-pressure tank pressure, low-pressure tank pressure, and split ratio, although a higher throttle valve pressure drop results in increased costs. When compared to a pressurized water system, the round-trip efficiency, energy storage density, and levelized cost of electricity improve by 1.00–1.59 %, 4.42–7.47 %, and 0.45–3.05 %, respectively. Among the heat storage materials evaluated, HITEC molten salt demonstrates the best overall performance, achieving a round-trip efficiency of 60.38 %, an energy storage density of 17.7 kW·h/m<sup>3</sup>, and a levelized cost of 0.1554 $/kW·h.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"326 ","pages":"Article 136214"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882035","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

Measuring platooning performances of connected and automated vehicles in energy consumption, emission, and efficiency 测量联网和自动驾驶车辆在能源消耗、排放和效率方面的列队行驶性能

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136172

Yuan Zheng , Ziyuan Pu , Shen Li , Yu Han , Haoning Xi , Bin Ran

{"title":"Measuring platooning performances of connected and automated vehicles in energy consumption, emission, and efficiency","authors":"Yuan Zheng , Ziyuan Pu , Shen Li , Yu Han , Haoning Xi , Bin Ran","doi":"10.1016/j.energy.2025.136172","DOIUrl":"10.1016/j.energy.2025.136172","url":null,"abstract":"<div><div>Determining the most appropriate connected and automated vehicle (CAV) platoon among alternatives is difficult for the decision-makers while considering multiple conflicting criteria, especially under different spacing policies facing conflicting criteria. The study measures platooning performances of CAVs under different spacing policies, considering energy consumption, emission, and efficiency impacts to determine the ranking order of the alternatives for two distinct groups of decision-makers. A hybrid multi-criteria decision-making approach is developed by integrating three modeling methods and jointly using the simulated and linguistic variables data. An illustrative case is conducted for two alternative CAV platoons from the decision-maker perspectives of enterprise owners and administrators. The results indicate that the CAV platoons with the constant spacing (CS) and constant time gap (CTG) policies exhibit better platooning performance for the enterprise owners and administrators, respectively. Therefore, the proposed approach can effectively serve as a decision-making tool for decision-makers to determine the platooning strategies for CAVs.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"326 ","pages":"Article 136172"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878805","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

Effect of wave amplitude on energy absorption characteristics of traveling wave turbine under different wave numbers 不同波数下波浪幅值对行波涡轮能量吸收特性的影响

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136210

Kairui Lu, Pengcheng Ruan, Yang Bai, Hongyu Gao

{"title":"Effect of wave amplitude on energy absorption characteristics of traveling wave turbine under different wave numbers","authors":"Kairui Lu, Pengcheng Ruan, Yang Bai, Hongyu Gao","doi":"10.1016/j.energy.2025.136210","DOIUrl":"10.1016/j.energy.2025.136210","url":null,"abstract":"<div><div>Turbines are typical energy conversion devices used in the electricity, shipbuilding, and aviation industries. Based on research on traveling wave energy acquisition methods, a novel kind of built-in traveling wave turbine is created. The effects of traveling wave turbines on energy harvesting characteristics under varying wave numbers are investigated through numerical simulation, with equivalent wave amplitudes being dimensionless. By analyzing the structure of the convection field, the mechanism of energy conversion was elucidated. It is revealed that increasing the wave number can enhance the energy absorption efficiency of the traveling wave plate, with the maximum efficiency of the double wave numbers exceeding that of the single wave number by 3.01 %. With the rise in dimensionless amplitude while keeping the wave number constant, the energy absorption efficiency of the traveling wave plate follows a tendency of initially increasing and then decreasing. Incrementing the wave number and dimensionless amplitude can to some extent boost the power coefficient of lateral force. Through flow-field analysis, it is established that the best position for energy acquisition of the traveling wave plate predominantly lies in the plate's rear section, elevating the wave number of the traveling wave plate serves to thereby enhancing energy utilization efficiency.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"325 ","pages":"Article 136210"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848471","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 physics-constrained deep learning framework enhanced with signal decomposition for accurate short-term photovoltaic power generation forecasting 基于信号分解的物理约束深度学习框架，用于光伏发电短期准确预测

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136220

Xifeng Gao , Yuesong Zang , Qian Ma , Mengmeng Liu , Yiming Cui , Dazhi Dang

{"title":"A physics-constrained deep learning framework enhanced with signal decomposition for accurate short-term photovoltaic power generation forecasting","authors":"Xifeng Gao , Yuesong Zang , Qian Ma , Mengmeng Liu , Yiming Cui , Dazhi Dang","doi":"10.1016/j.energy.2025.136220","DOIUrl":"10.1016/j.energy.2025.136220","url":null,"abstract":"<div><div>Accurate short-term forecasting of photovoltaic power generation is vital for maintaining the stability and efficiency of modern power systems. However, the variability and complexity of photovoltaic power, driven by meteorological factors, pose challenges for traditional models in achieving reliable forecasts. This study introduces a physics-constrained deep learning framework enhanced with signal decomposition to address these challenges. The framework employs complete ensemble empirical mode decomposition with adaptive noise to decompose photovoltaic power time series into intrinsic mode functions and a residual component, effectively extracting key dynamic features. These components are integrated with meteorological variables to construct a comprehensive feature matrix. A hybrid convolutional neural network-long short-term memory model captures spatial and temporal dependencies within the data. Furthermore, a customized photovoltaic power generation loss function, incorporating mean square error, regularization terms, and physical constraints, ensures the forecasts align with physical laws governing photovoltaic power generation. Evaluation results from extensive experiments demonstrate the framework's superior accuracy, robustness, and adherence to physical principles compared to baseline models. This work provides a novel and effective approach to enhancing photovoltaic power forecasting, supporting renewable energy integration into power grids, and improving overall system reliability.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"326 ","pages":"Article 136220"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864202","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 characteristics of thermionic energy converters employing barium-dispenser cathode and semiconductor anodes 采用钡分配器阴极和半导体阳极的热离子能量转换器的实验特性

IF 9 1区工程技术

Energy Pub Date : 2025-04-17 DOI: 10.1016/j.energy.2025.136132

Mengyuan Hao , Gang Xiao , Hao Qiu

{"title":"Experimental characteristics of thermionic energy converters employing barium-dispenser cathode and semiconductor anodes","authors":"Mengyuan Hao , Gang Xiao , Hao Qiu","doi":"10.1016/j.energy.2025.136132","DOIUrl":"10.1016/j.energy.2025.136132","url":null,"abstract":"<div><div>Thermionic energy converter (TEC) is a promising direct energy conversion technology which is expected to attain high efficiency approaching the ideal Carnot cycle. The exploration for low work function electrode materials and the alleviation of space charge effect have long been significant topics. In this work, TEC prototypes with Mo, n-type GaAs (nGaAs) and graphene/n-type GaAs Schottky heterojunction (Gr/nGaAs) anodes were developed and measured, respectively. The influences of cathode temperature, work function and space charge effect were analyzed by varying the cathode temperature and electrode gap. The electronic barrier was calculated to evaluate the space charge effect and exhibits an upward tendency with the increase of temperature and electrode gap. The experimental results indicate that the TEC with nGaAs anode exhibits the best performance. Notably, the output power of TEC with nGaAs anode shows an enhancement of 8.5-fold and 1.8-fold compared to that of Mo anode and Gr/nGaAs anode at 1398 K, respectively. In addition, the open-circuit voltage of nGaAs anode TEC was 0.57 V higher than that of the Gr/nGaAs anode TEC at 1398 K. This work not only provides a reference for the selection of TEC anode materials, but also paves the way for future researches aimed at achieving high output power in TECs.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"325 ","pages":"Article 136132"},"PeriodicalIF":9.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843424","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

Energy最新文献