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经济电流
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  economic current
     Principles and Methods for Calculation of Economic Current Density in Favor of Aluminum Bar Design
     确定铝母线经济电流密度的原则及方法
短句来源
     This paper introduces the economic type selecting method for sectional area of power cable according to economic current, and analyzes how to cany out the selection of economic current and economic section and related problems through specific examples.
     文章分析介绍了按经济电流选择电力电缆截面的经济选型方法,并通过具体实例分析,对经济电流和经济截面如何进行选择及相关问题进行了分析。
短句来源
     The Calculation Formula Research of Conductor′s Economic Current Density
     导体的经济电流密度参数分析
短句来源
     This paper expounds the composition and calculation of life cycle cost of cable project construction and operation,analyzes the economic operation of cables,and researches into the influence of cable cross-sectional area on annual cost and the effect of the maximum load utilizing time and power rate on economic current density.
     阐述了电缆线路工程建设、运行的全寿命周期总费用的构成及其计算方法,并对电缆的经济运行进行了比较和分析,讨论了电缆横截面积对年均总费用的影响,以及最大负荷利用时间和电价对经济电流密度的影响。
短句来源
     It is also suggested that the departments concerned in China recommend classified economic current density values of cables periodically or aperiodically.
     此外,还建议国家有关部门定期或不定期分类推荐电缆经济电流密度值。
短句来源
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  economical current
     ON ECONOMICAL CURRENT DENSITY FOR OVERHEAD LINE CONDUCTORS IN INDUSTRIAL ENTERPRISES
     论工业企业架空导线的经济电流密度
短句来源
     Economical Current Density Study on Overhead Line Conductors under Dynamic Mode
     架空导线动态模式下经济电流密度取值
短句来源
     Overhead Line Economical Current Density Based on Dynamic Model
     架空导线动态模式下的经济电流密度
短句来源
     The Inquiry into Economical Current Density
     对经济电流密度的探讨
短句来源
     It is pointed out that the current economical density in force is irrationality. Recommended values and practical curve jec=f(α/β) are provided to determinate the economical current density under dynamic pattern.
     阐明了原国家颁布的经济电流密度在现阶段使用的不合理性,给出了现阶段经济电流密度推荐值及方便实用的jec=f(α/β)曲线,为动态模式下架空导线经济电流密度的取值提供了方法和依据。
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  “经济电流”译为未确定词的双语例句
     An Investigation of Wire's Economy Density
     导线经济电流密度探讨
短句来源
     Selecting Cable Section Based on Economy Electric Current
     按经济电流选择电缆截面
     In this article,the methods to be used for calculation of economic currentdensity in favor of aluminum bar design are classified into three categories,namely,the minimum cost method,the minimum capital recovery time method,and theminimum expense method.
     本文把铝母线经济电流密度的各种计算方法按其计算原则归纳为三大类,即成本最低法、投资回收期最短法和计算费用最低法。
短句来源
     In this paper two optimization problems on the economical electricity of multiform soda electrolysers are discussed.
     本文研究多种不同烧碱电解槽同时运行时的电解电流调优问题:1.要完成一定产量的最小生产电耗的经济电流分配;
短句来源
     Based on the compact line working principle and transjmission system optimal designing theory,the economy of using compact line is analyzed. The ratio of transmission power p to natural power pn should not be too small under mounain area conditions,and the optimal ratio (P/Pn)opt. can be determined by transmission system optimal designing.
     根据紧凑型线路原理和输电系统优化设计理论,分析了紧凑型线路的经济性,指出了在山区条件下传输功率和自然功率Pn的比值不宜过小,通过输电系统优化设计可确定P和Pn的最佳比值(P/Pn)опт,而这个最佳比值的确定和经济电流密度J的确定同等重要,是合理应用紧凑型输电线路的关键。
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随着电力系统和机组单位容量的日益增长,为了节约母线的有色金属使用量,本文提出了解决大电流载流母线的新方法.文中着重地探讨了新型水冷却母线载流能力的计算方法,并利用模拟试验法证实了米海耶夫所推荐的计算公式完全适用于水冷却母线的情况,而且具有相当的精确性.此外,文中还初步涉及了:(1)水冷却母线动稳定和热稳定的计算;(2)水冷却母线结构的可能方案;(3)母线的腐蚀过程和解决腐蚀的方法;(4)母线冷却系统的原理接线图;(5)水冷却母线的经济电流密度等方面,并对水冷却与风冷却母线作了概略地技术经济比较.

After various formulae used to calculate economic current density ofaluminum busbars having been discussed, this paper points out that there isnot yet such an idea of profitability in capital cost on the prevailingcalculations at home, thus giving rise to a waste of capital cost about 60%.Moreover, all the relevant formulae above mentioned have not taken theitem of floating capital into account so far, and an increase of loss by 8%should be caused. Hence, a modified formula is deduced as follows D_b=(dq/(ρTk(1+nb/(365)))((q-q_c)/(Nq)+b))~(1/2)...

After various formulae used to calculate economic current density ofaluminum busbars having been discussed, this paper points out that there isnot yet such an idea of profitability in capital cost on the prevailingcalculations at home, thus giving rise to a waste of capital cost about 60%.Moreover, all the relevant formulae above mentioned have not taken theitem of floating capital into account so far, and an increase of loss by 8%should be caused. Hence, a modified formula is deduced as follows D_b=(dq/(ρTk(1+nb/(365)))((q-q_c)/(Nq)+b))~(1/2) A/mm~/Under the condition of our country, value of D_b calculated are 0.30-0.36A/mm~2. This paper suggests further that the point of minimum cost isnot the optimum control condition. The general formula for optimum controlcondition may be dQ/(dZ)= -Bwhere B the profitability of the total capital for enterprises of same kind.

本文分析了国内外母线经济电流密度的计算公式指出,对我国影响最广的算法中没有资金收益率概 念。这将会造成2/3的投资浪费。还指出,迄今为止的所有公式中都没把流动资金计入在内,这将增 加8%的消耗损失。本文导出下列公式计算母线经济电流密度: D_b=(dq/ρTk(1+n·b/365)(q-q_c/Nq+b))~(1/2) A/mm~2 结合我国情况计算了D_b ,约为0.30—0.36A/mm~2。 本文还指出成本极小值不是最佳控制条件,提出下式为最佳控制基本公式: dQ/dZ=-B B为同类企业总资金收益率。

In this article,the methods to be used for calculation of economic currentdensity in favor of aluminum bar design are classified into three categories,namely,the minimum cost method,the minimum capital recovery time method,and theminimum expense method.Through enormous mathematical and graphical analysisin this article,it has been proved that only the minimum expense method is worthyof recommandation.In compliance with the convention of our country,all formulasare derived on the basis of simple interest.However,the...

In this article,the methods to be used for calculation of economic currentdensity in favor of aluminum bar design are classified into three categories,namely,the minimum cost method,the minimum capital recovery time method,and theminimum expense method.Through enormous mathematical and graphical analysisin this article,it has been proved that only the minimum expense method is worthyof recommandation.In compliance with the convention of our country,all formulasare derived on the basis of simple interest.However,the correlations betweensimple interest and compound interest are made known in this article for refer-ences.

本文把铝母线经济电流密度的各种计算方法按其计算原则归纳为三大类,即成本最低法、投资回收期最短法和计算费用最低法。通过数学及图解分析证字了计算费用最低法是唯一可取的方法。从我国实际情况出发,各公式均按单利推出。本文还指出了单利法和复利法的内在联系。

 
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