过冷

The results indicate that the rapid solidification effects of the zero-dimensional metal droplets are limited by the undercooling achieved before nucleation occurs and the external rate of heat extration.

结果表明：零维液滴的凝固过程由形核前所达到的过冷和系统向环境的散热共同控制；零维液滴在真空条件下的冷却速度在105～108 K/s之间。

The model is based on the Nusselts solutions by considering the factors of vapor-liquid interfacial shear stress, the super-cold and the density of the vapor which have important influence on the heat transfer performance of the thermosyphon.

模型建立在Nusselt纯净饱和蒸汽层流膜状凝结理论的基础上，考虑了对热虹吸管的传热性能有重要影响的气液界面剪切应力、过冷度和蒸汽密度这几个因素。

The operation of condensation equipment primarily ensures the most favorable vacuum degree of condenser, reduces supercooling and oxygen content of condensation water and guarantees the quality of condensation water.

凝汽设备的运行主要是能保证凝汽器达到最有利的真空度，减少凝结水的过冷度和含氧量，保证凝结水达到合格的水质。

The tube bundle is the main composition of condenser. Its reasonable arrangement and layout can determine the condenser vacuum degree, condensate supercooling and oxygen content.

管束是凝汽器的主要组成部件，管束的排列方式和布置是否合理，对凝汽器的真空度、凝结水的过冷度和含氧量均起着决定性作用。

The characteristics of CaCO〓 crystallization fouling on heat transfer surface in subcooled flow boiling flowing upward system are investigated. The influence of carrying gas injection (using N〓 as carrying gas) in the system on the scale formation is also studied.

5对过冷流动沸腾过程CaCO〓在竖直换热面上的结垢机理进行了实验研究，同时在流动系统中引入载气，考察其对污垢形成的作用。

Set up appropriate heat regenerative channel of steam to directly flow partial steam until the condenser bottom.

布置适当的蒸汽回热通道，使部分蒸汽直接通到凝汽器底部再加热凝结水，以减小进入热井凝结水的过冷度

Principles for direct impacts of vacuum system tightness of steam turbine on condenser pressure,condensate supercooling and oxygen content as well as the influence on the safe operation and economic effect of steam turbine are analyzed,and the importance of tightness of vacuum system is pointed out.

分析了汽轮机组的真空系统严密性直接影响到凝汽器压力、凝结水过冷度、含氧量的机理，以及对汽轮机组安全运行和经济性的影响，指出了真空系统严密性的重要性。

The results showed that when PA1010 was filled with 1.5% n- SiO2, the properties of the coating was best .The coating-substrate adhesion stress was 28.9 MPa . The self-strength of the coating was 69.8 MPa. DSC analysis shown that n- SiO2 could increase the crystallization speed of PA1010 coatings obviously.

结果表明：当复合涂层配比为m(PA1010)：m(n- SiO2)=100.0： 1.5时，复合涂层综合性能较佳，涂层自拉伸强度为69.8 MPa，涂层与基体结合强度为28.9 MPa；纳米SiO2有明显的异质成核作用，使复合涂层的过冷度由27.0 ℃下降为24.0 ℃；纳米SiO2能够显著提高涂层的力学性能，有助于提高复合涂层的结晶速率，具有明显的成核作用。

The results show that HMX can reduce the super-cooling degree of DNTF and eliminate self-heating of DNTF crystallization.

结果表明，HMX能降低DNTF的过冷度，有效消除自加热。

9 Open valve undercooling subcooledtemperatureofopenvalve Valve opening pressure corresponding saturation temperature and the temperature difference of absolute value.

3.2.9 开阀过冷度subcooledtemperatureofopenvalve 开阀温度与相应压力下饱和温度之差的绝对值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。