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低负荷工况
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  running on the lower load
     This paper studied the structure and collocation of boiler reheat as well as adjusting characteristic of burning in boiler. Analyzing reason of boiler reheat temperature on the low side when MITSUBISHI 1 205 t/h is running on the lower load. Holding up adopted measure and improved method,providing foundation as MITSUBISHI 1 205 t/h is running on the lower load.
     通过对河津发电厂1号、2号锅炉再热器结构和布置特点,以及锅炉燃烧调整特性的形究,重点对三菱1205t/h锅炉在低负荷工况运行时,再热汽温偏低的原因进行了分析,提出了采取的措施和改进的方法,为锅炉在低负荷工况下再热汽温的调整提供了依据。
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  low load conditions
     The experimental results showed that the performance of USC system was good in low load conditions but bad in high load conditions.
     试验结果表明 ,该燃烧系统的性能在低负荷工况较好 ,在高负荷工况较差。
短句来源
     Multi-dimensional numerical simulation is made to analyze the characteristics of charge stratification at low load conditions in a two-stroke DISI engine.
     为揭示二冲程汽油机缸内直喷分层充气的特点,本文对低负荷工况下直喷二冲程汽油机缸内流场进行了多维数值模拟。
短句来源
  low load state
     Gas Reprocessing on Low Load State of Natural Gas Processing Installation
     天然气处理装置低负荷工况下的干气再加工
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  “低负荷工况”译为未确定词的双语例句
     HC and CO emissions are reduced remarkably by optimizing _a.
     通过对a进行优化控制,大大降低了低负荷工况下HC和CO排放。
短句来源
     The eternal characteristics calculation method is not suitable for the full-scale of hydro turbine due to the limits of static characteristics curves which is based on experiments at 30%~115%normal load.
     因为以水轮机静态全特性或完整综合特性曲线是以模型水轮机实验得到的,是在一定范围内的,通常为30%~115%,对于低负荷工况精度不好。
短句来源
     Use several kinds of thermal calculation methods of boiler's furnace,and calculate the outlet flue gas temperature of a low load of some supercharged boiler.
     运用几种热力计算方法,对某型船用增压锅炉低负荷工况的炉膛出口烟气温度进行了计算。
短句来源
     Numerical simulation method is employed in this paper to study the low and ultralow operating cases with high-temperature air direct-ignition burner and HBC-SSAburner.
     本文应用数值模拟方法,对高温空气无油点火燃烧器和水平浓淡燃烧器相结合的抚顺电厂670t/h电站锅炉低负荷和超低负荷工况进行了数值模拟研究。
短句来源
     With the test and numerical simulation,the possibility to improve the diesel's economical performance in middle and low load condition is researched. The adjusting principle and a new adjusting scheme of the bypass valve are proposed.
     通过实机试验以及数值模拟计算 ,着重探讨了在现有的车用高速增压柴油机增压系统的基础之上改进柴油机中低负荷工况经济性的可能性 ,提出了废气旁通阀的调节原则以及一种新的调节方案。
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      low load conditions
    Whereas asymmetric traffic conditions only slightly affect the fairness of IPS under low load conditions.
          
    With the increase of layer thickness, its friction coefficient was unchanged, and under low load conditions, its operational period was prolonged.
          
    Experiments were performed on a 1.9 liter, four-cylinder Volkswagen turbo-charged direct injec tion engine under steady state, low load conditions.
          
    Figures given in Table 1 could be used as standards on heavy, medium and low load conditions.
          
    In low load conditions gas velocity may not be high enough to return oil to the compressor.
          
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    This paper systematically introduces a mathematical model which is capableof predicting the combustion process and the performance parameters of quiescentchamber diesel engines in a wide range of operating conditions.After analysing the features of injection process of diesel engine in lowload condition,this paper establishes the pulse-jet mixing and single droplet isothermal evaporation model.The calculation method based on pulse-jet is usedto individually calculate the sub-entrainment and the sub-evaporation...

    This paper systematically introduces a mathematical model which is capableof predicting the combustion process and the performance parameters of quiescentchamber diesel engines in a wide range of operating conditions.After analysing the features of injection process of diesel engine in lowload condition,this paper establishes the pulse-jet mixing and single droplet isothermal evaporation model.The calculation method based on pulse-jet is usedto individually calculate the sub-entrainment and the sub-evaporation of thefuel packages jeted into the cylinder nonsimultaneously,and then to calculatethe total-entrainment and the total-evaporation of the spray by Duhamel'sintegral(convolution integral).The ignition delay,chemical kinetics,and tem-perature homogenization in the cylinder all simulated in the model.The agreement between theoretical and experimental results is so satisfactorythat the model is fit for using not only in high load conditions but also inlow load ones and for changing the injection timing.Moreover,it can properlyreflect the influence of engine type and injection system structure on engineperformance.On the other hand,the model is useful to the investigations of themechanism of diesel engine combustion and the formation of exhaust emissions.A FORTRAN code depended upon this model is named HCCM 2.2,whichcan be run in a IBM personal computer,in which the CPU time is about twoor three minutes long when time step is 1℃A.The compared calculation indica-tes that the differences in power and peak pressure between 0.1℃A and 1℃Atime step are both less than 2.0 percent.

    本文系统地介绍了一个能预测静止燃烧室柴油机多种工况下的燃烧过程及性能参数的燃烧数学模型。经过分析直喷式柴油机在低负荷工况下喷射过程的特点后,文章提出了脉冲射流混合、单油滴等温蒸发模型。模型采用了脉冲喷射方法,分别计算不同时刻喷入气缸的燃油小区的空气卷入及燃油蒸发过程,再用折积的方法计算总空气卷入率及总蒸发率。此外,在模型中还模拟计算了着火迟延期、化学动力学及缸内温度的均匀化过程。理论计算与实验结果的一致性令人十分满意。模型不仅能很好地用于高负荷工况,也可以适用于低负荷工况及改变喷油定时的情况,且能较好地反映发动机及喷射系统结构参数对发动机性能的影响。此外,模型还可对柴油机燃烧及排气污染的机理进行分析研究。此模型的 FORTRAN 程序(HCCM2.2)可以在微型计算机上运行,1℃A 步长时机时约为2~3min(IBM—PC 机)。

    A non-linear mathematical model of the diesel engine is set up, with stress laid on the process of burning in the cylinder, and a two-zone-burning model is used to describe the process in the cylinder. The working cycle of the diesel engine under various conditions has been calculated. The software for optimal readjustment of the engine construction has been developed, and the construction parameters of the engine under lower load condition have been optimized. In order to verify the effect of the effort,experiments...

    A non-linear mathematical model of the diesel engine is set up, with stress laid on the process of burning in the cylinder, and a two-zone-burning model is used to describe the process in the cylinder. The working cycle of the diesel engine under various conditions has been calculated. The software for optimal readjustment of the engine construction has been developed, and the construction parameters of the engine under lower load condition have been optimized. In order to verify the effect of the effort,experiments have been made in the laboratory.

    对柴油机燃烧过程进行了较细致的研究,用双区燃烧模型描述缸内过程,建立了一个非线性柴油机数学模型.对多种工况下的柴油机工作循环进行仿真计算,并在此基础上研制了柴油机参数调整优化软件,对低负荷工况下柴油机的结构参数进行了优化。本文还进行了柴油机工作过程实验室试验,验证了所做工作的有效性.

    Additional errors occur to the differential pressure device used to measure the main steam flowrate when the unit operates in the conditions of start up and part load in a steam power plant. In order to eliminate these errors, it is necessary to compensate pressure, temperature and differential pressure signal for the all parameters such as c,ε, and β in the equation of flowrate, as well as pressure and temperature for the steam density in the equation of flowrate. Accordingly the equation of flowrate,...

    Additional errors occur to the differential pressure device used to measure the main steam flowrate when the unit operates in the conditions of start up and part load in a steam power plant. In order to eliminate these errors, it is necessary to compensate pressure, temperature and differential pressure signal for the all parameters such as c,ε, and β in the equation of flowrate, as well as pressure and temperature for the steam density in the equation of flowrate. Accordingly the equation of flowrate, in which all parameters concerned are compensated in terms of error analysis and data handling. the equation is simple, accurate, and suitable for computers and chip calculators which are used to, on line and real time, measure main steam flowrate in the conditions of start up and part load.

    火力发电厂机组在启动和低负荷工况运行时,测量主蒸汽流量的节流装置随之产生附加误差.为消除该误差,流量公式不仅需进行蒸汽密度的压力温度补偿,还需对流量公式中的c,ε,β等全部参数进行压力、温度和差压信号的补偿.因此根据误差分析和数据处理获得了全补偿的流量公式.该公式形式简单、准确度高,适用于计算机和单片机进行在线、实时测量启动和低负荷工况下的主蒸汽流量.

     
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