共查询到19条相似文献,搜索用时 46 毫秒
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以电控柴油机台架试验数据为基础,应用曲面插值法对台架试验数据进行处理,得到柴油机万有特性图并划分燃油经济性区域,应用二元三次插值法求得柴油机有效扭矩近似值.通过分析电控柴油机实车记录的运行状态参数,统计得出柴油机不同使用工况下有效燃油消耗率的概率分布,实现对电控柴油机实车使用燃油经济性的评价. 相似文献
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燃油磁化节能机理分析及应用 总被引:2,自引:0,他引:2
综合文献[1-3]和实验数据,燃油磁化后,其理化性质粘度、表面张力、闪点和燃点均有所降低,并从理论上加以分析其节能机理,还介绍燃油磁化技术在有关热工设备上的应用情况。 相似文献
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开发了发动机性能台架试验自动化系统,包括发动机台架标定和性能开发试验自动化运行系统、发动机台架试验实时控制系统、发动机试验保护策略和系统、发动机台架试验测量系统不确定度评定、试验台架传动系统扭转振动校核等。将自动化系统应用于试验项目,实现了发动机台架标定和性能开发试验的完全自动化,提升了试验效率和质量,加快项目开发进度。 相似文献
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机车柴油机的出厂台架试验大连机车厂叶岚1前言铁路干线内燃机车的动力装置─—柴油机属大功率柴油机,在装车出厂后,要满足正常牵引要求,不存在降低转速和降低功率进行跑合的运转期。因此每台机车柴油机在出厂前均需进行较为严格、试验时间相对较长(例16V240Z... 相似文献
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对火焰炉采用乳化重油后的节能进行的分析,并联系到平炉燃用乳化重油的情况,作者认为火焰炉采用乳化油后是否节能,需依据炉子的具体情况而定。使用乳化油后应适当降低空气消耗系数及调整有关参数。 相似文献
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锅炉与炉窑燃料油使用中的常见问题及解决方法 总被引:3,自引:0,他引:3
对燃油锅炉与炉窑使用中的常见问题以及燃料油主要质量指标的优劣对燃烧工况的关联影响进行分析,并提出一种经济实用简便的解决方法,达到改善燃油锅炉与炉窑燃烧工况与抑制硫、钒的腐蚀,灰分积焦、积炭、油泥生成等,又达到降低能耗、减少烟气排放的目的。 相似文献
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物流仓储促进了经济的发展熏但是同时也给环境带来负面的影响熏如大量燃料和能源在物流过程中被消耗。文章介绍了上海大众汽车有限公司如何通过对化学品及燃料的物流管理方式的优化,在实现降低物流成本的同时实现能耗的降低。 相似文献
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Chuan Fang Liangfei Xu Siliang Cheng Jianqiu Li Hongliang Jiang Minggao Ouyang 《International Journal of Hydrogen Energy》2017,42(16):11745-11757
The temperature regulation of a cooling system of a PEMFC (Proton Exchange Membrane Fuel Cell) test bench is studied in this paper. Because of the unique configuration which is dedicated for cold start experiments, the operation at nominal temperature is unstable with a simple PI controller. A sliding-based control strategy is applied to suppress the temperature fluctuation. Firstly the structure of the cooling system is demonstrated and the cause of temperature fluctuation is analyzed. Then, a physics-based model of the cooling system is proposed on the Matlab/Simulink platform and validated with experimental data. Based on the model, a Sliding-mode controller with Extended Kalman Filter (EKF) is designed to regulate the temperature. The simulation results showed that the controlled system performed satisfactorily. Furthermore, when applied to the real system, the controller's real-time performance fulfills the test bench criterion. Experimental data show that the coolant temperature at the outlet of the fuel cell stack is kept in a range within ±1 °C, disregarding the heat generated at various working condition. 相似文献
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This study examines the random walk hypothesis for the crude oil markets, using daily data over the period 1982–2008. The weak-form efficient market hypothesis for two crude oil markets (UK Brent and US West Texas Intermediate) is tested with non-parametric variance ratio tests developed by [Wright J.H., 2000. Alternative variance-ratio tests using ranks and signs. Journal of Business and Economic Statistics, 18, 1–9] and [Belaire-Franch J. and Contreras D., 2004. Ranks and signs-based multiple variance ratio tests. Working paper, Department of Economic Analysis, University of Valencia] as well as the wild-bootstrap variance ratio tests suggested by [Kim, J.H., 2006. Wild bootstrapping variance ratio tests. Economics Letters, 92, 38–43]. We find that the Brent crude oil market is weak-form efficiency while the WTI crude oil market seems to be inefficiency on the 1994–2008 sub-period, suggesting that the deregulation have not improved the efficiency on the WTI crude oil market in the sense of making returns less predictable. 相似文献