查询词典 vacuum condenser

The mathematical model of complex countercurrent multi-effect evaporation with condensed water flash is established, which aims at minimum annual cost (including cost of fresh vapor, vacuum pump power, evaporator, maintenance and depreciation).Based on such decisive variables as the pressure of fresh vapor, the pressure of condenser and heat-transfer mean temperature difference of vari-effect,the model is solved by the complex method,Lagrangian multiplier method, iteration method and matrix method.The practical example indicates that the influence of the pressure of fresh vapor, the pressure of condenser and flash of condensed water on the optimum design results is notable.

建立了带有冷凝水闪蒸的复杂逆流多效蒸发系统优化设计的数学模型，该模型以整个蒸发系统的年总费用(包括加热蒸汽年费用、真空泵年动力费用以及蒸发器和辅助设备的年折旧维修费用等)最小为优化目标，以生蒸汽压力、冷凝器真空度及各效有效传热温度差为决策变量，提出一种新算法———复合形法结合Lagrangian乘子法、迭代法和矩阵法求解模型。

This thesis analyses the condenser's common faults, discusses the reasons and symptoms of the condenser's vacuum deterioration.

本文还分析了凝汽器的常见故障，重点分析了凝汽器真空恶化的原因及征兆。

Therefore, at the time of installation and maintenance of condenser, the vacuum system precision of condenser should be achieved as far as possible.

因此，在凝汽器安装与维修时，应尽可能使凝汽器真空系统达到严密。

In order to obtain higher vacuum degree for condenser, the saturation temperature of steam inside the condenser should approach the temperature of cooling water in all likelihood.

为使凝汽器获得较高的真空度，就要使凝汽器内蒸汽的饱和温度尽可能接近冷却水温度。

The purpose is to increase the hot exchange potentiality of the steam condenser and improve the vacuum of the steam condenser.

通过对2号汽轮机低压缸排汽通道进行优化改造试验，发挥了凝汽器铜管的热交换潜力，提高了凝汽器真空度。

Since the condenser pressure depends on condensation temperature, the factor influencing condensation temperature is also the factor influencing vacuum degree of condenser.

由于凝汽器压力取决于凝结温度，因此，影响凝结温度的因数也就是影响凝汽器真空度的因数。

The steam condensation, condenser vacuum and the condenser performance are improved.

正确合理地模拟和预测凝汽器壳侧汽相流动和传热特性，对凝

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。

With the established model, the optimization model of condenser is proposed to determine the best vacuum value of condenser and energy loss resulted by deviation of some main operation parameters, reduce the energy loss by optimize the controllable parameters.

在此基础上，建立发电功率与凝汽器真空的优化模型，确定热力系统各主要参数对汽轮机功率的影响以及凝汽器真空的运行应达值，以机组的最优运行为目标，优化可控参数，达到降低能耗的目的。

The influence of the seal water temperature of water ring vacuum bumps on the condenser pressure is analyzed quantitatively,and the relationship between the condenser pressure and the unit efficiency was identified with equivalent enthalpy drop method.

定量分析电厂水环式真空泵密封水温度对凝汽器压力的影响，并利用等效焓降法得到凝汽器压力与单元机组效率的关系，从而得到真空泵密封水温度和单元机组经济性的定量关系。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。