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LCA Analysis of Biocarbon Pellet Production to Substitute Coke 生物炭球团替代焦炭的LCA分析
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31754
Lorenzo Riva, H. K. Nielsen, Therese Videm Buø, Hewen Zhuo, Q. Yang, Haiping Yang, Ø. Skreiberg, Liang Wang, P. Bartocci, M. Barbanera, F. Fantozzi
Biocarbon is a promising alternative to fossil reductants for decreasing greenhouse gas emissions and increasing sustainability of the metallurgical industry. In comparison to conventional reductants (i.e., coke and coal), biocarbon has low density, poor mechanical strength and high reactivity. Densification is an efficient way to upgrade biocarbon and improve its undesirable properties. In this study, woody biocarbon is compressed into pellets using pyrolysis oils as a binder. In fact both pyrolysis oils and charcoal can be produced through the slow pyrolysis process and represent respectively the liquid product and the solid product. Pyrolysis gases can be used to sustain the process. Mass and energy balance of the biocarbon pelletization process are calculated and used to implement a LCA analysis. Final use of the produced biocarbon will be in the silicon industry in Norway.
生物碳是化石还原剂的一个很有前途的替代品,可以减少温室气体排放,提高冶金工业的可持续性。与传统还原剂(如焦炭和煤)相比,生物炭密度低,机械强度差,反应性高。致密化是提高生物炭性能和改善其不良性能的有效途径。在这项研究中,木质生物碳被压缩成颗粒,使用裂解油作为粘合剂。热解油和木炭实际上都可以通过慢热解过程产生,分别代表液体产物和固体产物。热解气体可以用来维持这一过程。计算了生物炭制粒过程的质量和能量平衡,并用于实现LCA分析。生产的生物碳的最终用途将用于挪威的硅工业。
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引用次数: 4
State of Charge Estimation for a Series Connected Lithium Ion Supercapacitor Module 串联锂离子超级电容模块的充电状态估计
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31799
Xiaojun Zhang, Xiaoyu Li, Jindong Tian, Yong Tian, Yuanzhi Liang
In this paper, a state of charge estimation method for a series connected lithium ion supercapacitor module is carried out. Lithium ion supercapacitor module is modeled by an equivalent circuit model. The state of charge of the cell is estimated based on the extended Kalman filter. Considering the inconsistency of the cells in the module, a module level SOC estimation method is proposed based on a weighting factor strategy. According to the experimental results, the error of the supercapacitor module SOC estimation method is less than 4%.
本文提出了一种串联锂离子超级电容模块的充电状态估计方法。采用等效电路模型对锂离子超级电容器模块进行建模。基于扩展卡尔曼滤波对电池的电荷状态进行估计。考虑到模块内单元的不一致性,提出了一种基于加权因子策略的模块级SOC估计方法。实验结果表明,所提出的超级电容模块SOC估计方法误差小于4%。
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引用次数: 0
Performance Analysis of Institutional Hybrid Energy System for Electrical Energy Tariffs 电力电价制度下混合能源系统的性能分析
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31812
Arvind Sharma, M. Kolhe, Nils Ulltveit-Moe, Kapil Muddineni, A. Mudgal, S. Garud
The operation of hybrid energy system is influenced not only by the availability of the local energy resources, but also due to the market energy pricings. In this work, a typical institutional hybrid energy system of TERI’s Retreat building, India is selected for evaluating the performance by considering Time-of-Use (ToU) tariff, and with and without distributed generator. The considered hybrid system consists of PV, battery and grid connectivity for meeting the institutional load demand. The real-time operation data of one year is used to analyze battery energy throughput with contribution from the distributed generator specially during the grid outage period. It is observed that effective use of ToU energy tariff can significantly improve the local PV utilization and operation of energy storage within the hybrid energy system.
混合能源系统的运行不仅受到当地能源可得性的影响,还受到市场能源定价的影响。本研究选择印度TERI的一个典型的机构混合能源系统,通过考虑使用时间(ToU)关税,以及有无分布式发电机来评估其性能。所考虑的混合系统由光伏、电池和电网连接组成,以满足机构负荷需求。利用一年的实时运行数据,分析了分布式发电机在电网停运期间对蓄电池能量的贡献。研究发现,有效利用分时电价可以显著提高混合能源系统的局部光伏利用率和储能运行。
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引用次数: 2
Research on Lightweight Carbon Fiber Roof of a Blade Electric Vehicle 叶片式电动汽车轻量化碳纤维车顶研究
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31765
Guangcai Tang, W. Jun, A. Tang
The static collapse model of carbon fiber composite material and steel roof of a domestic blade electric vehicle was established respectively through the finite element software--Hyperworks. The relationship between the pressure of the pressure plate and the collapse depth of the roof was calculated by using the ls-dyna solver. The results show that the carbon fiber composite has better protection to passengers than the steel roof, and has achieved obvious lightweight effect. In order to obtain the optimal protective layer method for the occupant, the static crushing simulation comparison was carried out on the composite roof of four classical layer methods [0/45/-45/90]2s, [0/90/45/- 45]2s, [45/45/0/90]2s and [45/45 /90/0]2s, the results showed that the [45/-45/90/0]2s method is superior to others as adopted in the layer mode.
通过Hyperworks有限元软件,分别建立了国产叶片式电动汽车碳纤维复合材料和钢车顶的静态坍塌模型。利用ls-dyna求解器计算了压板压力与顶板坍塌深度的关系。结果表明,碳纤维复合材料对乘客的保护优于钢车顶,并取得了明显的轻量化效果。为了获得最优的乘员保护层方法,对复合顶板4种经典保护层方法[0/45/-45/90]2s、[0/90/ -45]2s、[45/45/0/90]2s和[45/45/ 90/0]2s进行了静态破碎仿真比较,结果表明,在保护层模式下,[45/-45/90/0]2s方法优于其他保护层方法。
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引用次数: 0
Sustainable Development through Natural Gas Network Development in India 通过印度天然气网络发展实现可持续发展
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31732
A. Rawat, Sumeet Gupta, T. J. Rao
Natural gas has been gaining popularity as a fuel for the next century across the globe. The Indian government has been pushing to boost the natural gas share in the energy mix to 15% by 2030. City Gas Distribution (CGD) plays a crucial role in meeting the set target as the Indian government has given it a tag of priority sector. The Indian Government has been aggressively expanding the CGD footprints across India by conducting the bidding rounds for new Geographic Areas (GAs). This paper provides a comprehensive review of city gas distribution and delivers insights on developing a sustainable natural gas business in India.
天然气作为下个世纪的燃料在全球范围内越来越受欢迎。印度政府一直在推动到2030年将天然气在能源结构中的份额提高到15%。城市燃气配送(CGD)在实现既定目标方面发挥着至关重要的作用,因为印度政府已将其列为优先行业。印度政府一直在通过对新地理区域(GAs)进行招标,积极扩大CGD在印度的足迹。本文对印度城市天然气分布进行了全面的回顾,并提供了在印度发展可持续天然气业务的见解。
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引用次数: 0
Study on Regenerative Braking Control Strategy for the Dual-axle Distributed Drive Electric Vehicles 双轴分布式驱动电动汽车再生制动控制策略研究
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31727
Zeyu Chen, Yifeng Zhao, X. Cai, Zhen Wang
Regenerative braking technology, as a remarkable feature of electric vehicles, can effectively alleviate the driver’s operation burden and extend the driving range. In this paper, a novel regenerative braking strategy is proposed for electric vehicles. First, the brake force distribution relationship of front and rear wheels is studied for enough brake safety. Then an optimal algorithm based on multiple constraints and brake safety is proposed to achieve maximum recover energy. Finally, comparing with the series ECE regulation strategy, the proposed strategy is demonstrated that the enables achieve maximum energy recovery under different driving cycles. Energy recovery rate of the proposed algorithm is improved by 8.40%, 3.84% and 4.09%.
再生制动技术作为电动汽车的显著特点,可以有效减轻驾驶员的操作负担,延长续驶里程。提出了一种新的电动汽车再生制动策略。首先,研究了前后轮制动力分配关系,以保证足够的制动安全性。然后提出了一种基于多约束和制动安全的优化算法,以实现最大的回收能量。最后,通过与系列ECE调节策略的比较,验证了该策略在不同工况下能实现最大的能量回收。该算法的能量回收率分别提高了8.40%、3.84%和4.09%。
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引用次数: 0
State Estimation Method of Lithium-ion Battery Based on Electro-thermal Model and Strong Tracking Particle Filter 基于电热模型和强跟踪粒子滤波的锂离子电池状态估计方法
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31802
Chunyu Wang, N. Cui, Changlong Li
Accurate estimation of battery state is crucial for battery management system. Lithium-ion battery is a complex electrochemical system with coupled electrothermal characteristics and strong nonlinearity. Therefore a state estimation method based on electrothermal model and strong tracking particle filter is proposed in this article. The calorimetric method is employed to realize fast identification for thermal model parameter. By introducing strong tracking filter into particle filter, an estimator based on strong tracking particle filter is proposed to improve the estimation accuracy and tracking capability of saltatory state. The simulation and experiments are conducted to verify the performance of proposed method under dynamic characterization schedules.
电池状态的准确估计是电池管理系统的关键。锂离子电池是一个具有耦合电热特性和强非线性的复杂电化学系统。为此,本文提出了一种基于电热模型和强跟踪粒子滤波的状态估计方法。采用量热法实现了热模型参数的快速识别。通过在粒子滤波器中引入强跟踪滤波器,提出了一种基于强跟踪粒子滤波器的估计器,提高了跳跃状态的估计精度和跟踪能力。通过仿真和实验验证了该方法在动态表征计划下的性能。
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引用次数: 0
Matching Analysis and Optimization Design of Energy-saving Intelligent Electro-hydraulic Hybrid Steering System 节能型智能电液混合动力转向系统匹配分析与优化设计
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31739
Guobiao Shi, Qian Zhou, Shuai Wang, Chengyun Ju
Based on the modeling of 2DOF vehicle, energysaving intelligent EHHS system and controller, the influence of different parameters on the vehicle steering performance is studied and then the most important parameters are determined. To establish the stability criteria, the road feeling and steering sensitivity transfer function are derived. Next, the optimization model is put forward, and the genetic algorithm is used to optimize the important parameters of EHHS system. The simulation results show that the optimization design improves the steering performance of the steering system while ensuring the stability of the system.
基于二自由度汽车的建模、节能智能EHHS系统和控制器,研究了不同参数对汽车转向性能的影响,确定了最重要的参数。为了建立稳定性判据,推导了路感和转向灵敏度传递函数。其次,提出了优化模型,并利用遗传算法对EHHS系统的重要参数进行了优化。仿真结果表明,优化设计在保证转向系统稳定性的同时,提高了转向系统的转向性能。
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引用次数: 0
Life Cycle Water Use for Oxy Fuel Combustion Power Generation with CO2 Capture and Storage 含氧燃料燃烧发电与二氧化碳捕集与封存的生命周期用水
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31758
M. Jalal, Q. Yang, Chen Mengxi
The water scarcity is becoming a growing concern. Regarded as a potential CO emission mitigation technology for coal-fired power plants, oxy-fuel combustion, a typical CCS technology, theoretically consumes a large amount of water, which increases the severity of the water scarcity. Therefore, revealing the water use of oxy-fuel coal-fired power plants is of great importance for the deployment of CCS technologies under water resource constraint in the future. In this respect, the aim of this study is to evaluate the life cycle water use of oxy-fuel CO capture, transport and storage via a 600 MW coal fired oxy-fuel power plant in China. By using a tiered hybrid life cycle assessment, both direct and indirect water use are calculated. Results show 22.9L H O/kg of CO and the oxy-fuel power plant stage dominates the total water use, while the water intensity for power generation is calculated as 3233.3 L H O/MWh, which is higher than the conventional power plants. Sensitivity analysis is performed in this research and indicates that the variation of tap water use affects the water intensity immensely. Furthermore, the use of the membrane method for air separation decreases the overall water use 14.21% respectively. China is continually increasing its efforts to reduce carbon emissions due to both domestic and international pressure. Hence the development and implement of the CCS technology is of great urgency. At the end of this study possible solutions such as using wasted or discarded wind power for the separation of oxygen to minimize water use in oxy-fuel power plant stage are put forward.
水资源短缺正成为一个日益令人担忧的问题。全氧燃烧作为典型的CCS技术,在理论上消耗大量的水,增加了水资源短缺的严重程度,被认为是一种有潜力的燃煤电厂CO减排技术。因此,揭示全氧燃煤电厂的用水情况,对于未来水资源约束下CCS技术的部署具有重要意义。在这方面,本研究的目的是通过中国一座600兆瓦的燃煤全氧电厂来评估全氧燃料CO捕集、运输和储存的生命周期用水量。通过分层混合生命周期评估,计算了直接和间接用水量。结果表明:CO为22.9L H O/kg,全氧火力发电厂阶段占总用水量的主导地位,发电用水强度为3233.3 L H O/MWh,高于常规火力发电厂;本研究进行了敏感性分析,结果表明自来水用量的变化对水强度的影响很大。此外,采用膜法进行空气分离的总用水量分别降低了14.21%。由于国内和国际的压力,中国正在不断加大减少碳排放的努力。因此,开发和实施CCS技术刻不容缓。在本研究的最后,提出了可能的解决方案,如利用废弃或废弃的风力发电进行氧分离,以尽量减少氧燃料发电厂阶段的用水量。
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引用次数: 0
A Novel State-of-charge Correction and Online Capacity Estimation for Lithium-ion Batteries in Full Life Cycle 锂离子电池全寿命周期充电状态校正与在线容量估计
Pub Date : 2019-10-31 DOI: 10.12783/dteees/iceee2019/31819
Sijia Yang, Jiuchun Jiang, Caiping Zhang, Weige Zhang, Yang Gao
In this paper, a novel online state-of-charge (SOC) correction approach in terms of utilizing only the Ampere-hour (Ah) counting is proposed. The method include updating the battery maximum capacity and a SOC modification and is verified on both fresh and degradation batteries. The algorithm presents reasonable results and is able to modify the SOC to an accuracy within ±3% for full life cycle, which has potential for real application in regular maintenance of hybrid electric vehicles.
本文提出一种仅利用安培小时(Ah)计数的在线荷电状态(SOC)校正方法。该方法包括更新电池的最大容量和SOC修改,并在新电池和退化电池上进行了验证。该算法结果合理,能够将SOC的全生命周期修正精度控制在±3%以内,具有实际应用于混合动力汽车定期维护的潜力。
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引用次数: 0
期刊
DEStech Transactions on Environment, Energy and Earth Sciences
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