共查询到20条相似文献,搜索用时 171 毫秒
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传统采用LLC谐振半桥法设计的电动汽车充电器,存在充电器充电耗时长、消耗功率大,使用寿命短问题,提出基于BMS的电动汽车智能充电器低功耗设计方法,充分考虑环境因素对充电器的老化、腐蚀等影响,对智能充电器的总体框架进行设计,通过控制电路对电路中产生的信息进行有效收集,获取控制信号或保护信号,有效控制充电时电池功率;采用保护电路检测故障以及进行故障预警。通过分析充电器在采样模式和等待模式的功率消耗,获取智能充电器的低功耗工作模式,实现充电器的低功耗控制。实验结果说明,所提方法可有效缓解环境因素对充电器的老化、腐蚀等影响,降低电动汽车充电用时和功耗,延长充电器的使用寿命。 相似文献
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触目惊心:
如果保守地设定电脑显示器和打印机的待机功率都和5瓦/台,下班后不关闭电源开关,一晚上至少待机10小时,则电脑显示器和打印机分别造成0.05千瓦/小时的待机能耗。 相似文献
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本文根据城市污水处理工程的特点,提出从设计、施工、调试三个方面对项目的费用、进度和质量进行控制的方法和建议。 相似文献
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低碳经济下的智能用电技术与环境安全 总被引:1,自引:0,他引:1
智能用电作为建设坚强智能电网的重要组成部分,具有高度的自动化水平和很强的自愈能力。采用智能用电技术可以将各种分布式再生能源迅速接入电网,对环境安全具有重要的促进作用。通过介绍智能用电这一新技术的发展现状和及其关键技术,从能源防御体系、土地利用和电力生产等方面对智能用电与环境安全之间的关系进行了分析。采用智能用电技术可以减少碳排放,提高用电系统的抗击灾害能力,保护环境、集约利用土地,是环境安全体系中非常重要的组成环节。 相似文献
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Arthur R. Giaquinta Thomas E. Croley II 《Journal of the American Water Resources Association》1981,17(3):423-429
Power plant water consumption (evaporative water loss) for various river temperature standards is presented for existing and proposed power plants located along the Missouri and Upper Mississippi Rivers in the MAPP geographical area. Thermodynamic and economic models are combined to evaluate the cooling related water consumption at various river thermal standards. The existing thermal standards and a number of other hypothetical thermal regulations including the extreme cases of no thermal standards and no allowable heated discharges are examined to show the dependence on thermal standards of power production related water consumption. A critical appraisal of the cost of thermal standards in terms of water consumption is thereby possible so that subjective assessments of the standards can proceed with full knowledge of the tradeoffs involved between the “water costs” of power production and environmental enhancement. 相似文献
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以华能福州电厂石灰石-石膏湿法烟气脱硫工程试验数据为基础,对脱硫装置运行优化进行了研究。分别考察了循环泵运行组合、吸收塔浆液密度、pH值和液位等参数,及对整个脱硫装置运行电耗的影响。通过试验数据和理论分析,提出了不同运行条件下对参数选择的意见,并实际验证了脱硫装置运行优化以降低电耗的可行性,可为电厂脱硫系统运行方案的优化选择提供参考。 相似文献
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本文对国内外污水处理设备中的潜水搅拌器(机)和倒伞曝气机在能耗和效率方面进行了对比,应用实践证明,国产污水处理设备的能效比远远优于引进及仿制的国外同类产品。 相似文献
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旅皖国内旅游者消费结构初探 总被引:14,自引:0,他引:14
分析比较了2001年旅皖国内旅游者消费结构的特点和原因,认为国内旅游者消费结构以刚性旅游消费为主,弹性旅游消费比重较低;普遍具有较强的住宿、餐饮消费偏好,购物、娱乐是消费弱项.为引导旅游者关注弹性消费,实现消费结构合理化,促进安徽省旅游业产业结构的优化升级和经济效益的持续增长,应构建形式多样的大众娱乐设施,丰富旅游景区的娱乐功能,提升旅游商品档次和销售能力,建设多功能购物街,多方位营造安全的旅游消费环境. 相似文献
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Rodney L. Clouser William L. Miller 《Journal of the American Water Resources Association》1980,16(3):453-458
ABSTRACT: A study was undertaken to determine the effect of water intensive appliances or activities on household water consumption. Activities included in the study were use of the washing machine, dishwasher, swimming pool, and lawn watering. In the majority of cases these activities increased per capita consumption and were statistically significant. Households included in the study were not familiar with water saving devices available in the retail market. Even if tehse appliances were purchased, private economic benefits to the household would be low due to the inexpensive water charges levied. However, aggregate community benefits could be large if new well drilling cost or increase in storage facilities could be avoided. In order to avoid these increased costs, regulation or subsidy programs may be the most efficient policy alternatives available to the communities. Subsidies and regulation could potentially decrease water use and offer alternatives to increasing the water supply. 相似文献
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M. Zemamou A. Toumi K. Mrigua Y. Lahlou M. Aggour 《International Journal of Green Energy》2020,17(11):652-665
ABSTRACT Advanced wind turbine designs and technologies have been evolved to take advantage of wind energy. Despite the significant progress already attained, the need for a dependable wind energy converter particularly devoted to small-scale applications remains a challenging issue. Due to its design simplicity, Savonius wind turbine is the most suitable candidate for such applications. It operates at low wind speed, with the necessary starting capacity and insensitivity to wind directions. Moreover, in the literature related to wind energy, the Savonius rotor is known for its low performance compared to other types of wind turbines. In this paper, we present a study into the utilization of Bézier curves and transient computational fluid dynamics (CFD) to optimize the conventional Savonius blade design. The k-ω SST turbulence model is employed to perform a series of CFD simulations in order to assess the power coefficient of each generated design. A validation of optimization results using the Taguchi method was carried out. The comparative analysis of the torque and power coefficients shows a significant increase in the power coefficient (Cp). The optimal Cp is 0.35 and is 29% higher than the conventional Savoniu wind turbine (SWT). Subsequently, the effectiveness of the innovative geometry is proved by improved pressure and velocity distributions around blades of novel design. 相似文献