蒸发

The characters and applications of vacuum film evaporation and molecular evaporation are outlined, and an XZN inner-cooling vacuum agitated film evaporator was used to reduce free monomer from HDI biuret , which is for improving the quality of polyurethane paints and coatings, decreasing pollution and danger to worker.

本文介绍了真空薄膜蒸发和分子蒸发的原理、特点和应用，并介绍了真空薄膜蒸发-冷凝工艺在分离HDI 缩二脲中游离单体中的应用。

Partitioning the detail vegetation types, in the agricultural vegetation, annual harvest crop had a strongest sensitivity to precipitation, the follow was temperature and evaporation. Biannual harvest crop part of which could be irrigated or biyearly tri-harvest dry crop had a strongest sensitivity to temperature, the follow was precipitation and evaporation.

具体分植被类型来讲，农业植被中：一年一熟粮作植被对水分的敏感性最强，温度、蒸发次之；大部分具备灌溉条件的一年两熟或者两年三熟旱作农业植被，也对温度最敏感，对降水、蒸发的敏感性要弱一些；一年水旱两熟粮作植被对温度最敏感，蒸发、降水次之。

The cooling process involves complex droplet evaporation, strong convective heat and mass transfer, therefore a deep understanding of spray characteristics is essential to optimize the nozzle design and improve the cooling efficiency of the spray. This paper presents a theoretical model to describe the equilibrium evaporation process of a single droplet in cryogen spray.

为了深入了解制冷剂喷雾特性以提高冷却效率、优化喷嘴设计，利用质量传递数法推导传质方程，通过选取合适的阻力系数经验关联式建立了动量方程，考虑液滴蒸发以及与环境气体的对流换热建立了液滴能量方程，初步建立了单个制冷剂液滴平衡蒸发阶段蒸发冷却理论模型。

When evaporation was in process, due to low initial water content, most infiltrated water from small intensity and amount of rainfall would be consumed by intensive evapotranspiration during rainy season, and lateral downslope unsaturated flow seldom took place. However, soil water would move downslope by gravitational and matric potential gradients after continuous rainfall.

3在防止蒸发条件下，再分布过程中，土壤水分在重力的作用下有沿坡向下运移的趋势；在蒸发条件下，由于初始含水量一般较低，雨季量小且分散的降雨极易为强烈的蒸发蒸腾所消耗，侧向沿坡向下流难以发生，但在持续的降雨条件下，土壤水分在重力势和基质势梯度的作用下易沿坡向下运移。

The revised Hargraves formula has the best result compared with Penman-Monteith formula, the average relative error is 6%, moreover, Hargaves method requiring the least data in calculating ETo, so this method has the high actual application value; The following are Radiation method and Blaney-Criddle method ; The worst is the Pan method, even after revised, the highest and average relative error is 36% and 10%, respectively. So, in this study, Penman-Monteith method, Radiation method, Blaney-Criddle method and Hargraves method are used except Pan method.

在这四种方法中，修正后的Hargraves方法与彭曼—蒙特斯方法的计算结果符合最好，其平均相对误差为6％，而Hargraves方法需要的气象数据只有计算时段的最高、最低温度，该方法具有较高的实际应用价值；辐射方法和布兰尼—克里德尔方法次之；蒸发皿方法最差，即使在修正后，E601型蒸发皿的最大误差也高达36％，平均为10％，所以在预报系统的研究设计中采用了除蒸发皿方法之外的四种方法。

Based on simulation and thorough research of the muti-effect evaporative system, a process of paratactic combination evaporation is added to this system and Genetic Algorithms is used for optimization. In this thesis, Simple Genetic Algorithms and Modified Genetic Algorithms are used to optimize the pressures in evaporators.

在模拟的基础上，通过对齐鲁石化氯碱厂蒸发系统进行深入研究后，本文将并列组合式热泵蒸发工艺应用到该系统中，并运用简单遗传算法和改进的遗传算法对改进后蒸发系统的压力进行了优化，优化的结果显示生蒸汽用量分别减少14.8％和18.5％。

The effective heat-transfer temperature difference of every effect of multi-effect evaporation subsystem and the preheat temperature rise Δt_(p,j of every level of multi-level preheat subsystem of the design model were distributed by equal heating area, equal heat-transfer temperature difference, and free proration methods.

设计型模型对多效蒸发子系统各效有效传热温差Δt_i的分配和多级预热子系统各级预热温升Δt_的分配分别采用等面积法、等温差法、自由配比法等进行分配并采用矩阵法结合迭代法进行设计模拟计算，其中自由配比法巧妙地将具有复杂约束条件的决策变量Δt_i和Δt_转化为取值0～1的中间决策变量τ_i、τ_，为Δt_i和Δt_的自由搜索进而为优化设计提供了一个简便的方法；在常规设计模拟计算的基础上，建立了复杂多效蒸发系统优化设计模型，该模型以系统年总费用最小为优化目标，以生蒸汽温度T_0、冷凝器中二次蒸汽温度T_K、蒸发温差配比系数τ_i和预热温升配比系数τ_为决策变量，采用遗传算法结合矩阵法求解。

In Scramjet, the evaporation of most liquid fuel occurs under the subnormal pressure condition. However, it is rarely seen in the existing documents about the study of the evaporation and combustion of the fuel droplet at subnormal pressure. This thesis gives the experimental and theoretical study about that.

在超燃冲压发动机的燃烧室中，液体燃料的蒸发大部分是在一个负压环境下完成的，现有文献对负压环境下燃料液滴蒸发和燃烧过程的研究却很少，本文对负压环境下燃料液滴蒸发过程进行了试验和理论研究。

Compressor power consumption was greatly affected by inlet air relative humidity and wet-bulb temperature.

结果显示：冷凝温度和冷凝压力均随着入口空气湿球温度的升高而升高；入口空气相对湿度对压缩机功耗的影响与湿球温度对压缩机功耗的影响均比较大；对基于同一压缩系统的实验比较表明，在冷凝温度为38℃时，板式蒸发式冷凝器的热流密度比管式蒸发式冷凝器平均大30.5%；且在相同的冷凝温度下，入口空气湿球温度越低，板式蒸发式冷凝器的热流密度比管式蒸发式冷凝器大得越多。

A surface evaporating air cooler heat exchange tube with membrane plate can improve the water membrane area and improve the evaporation heat transmission, without significant wind resistance.

带有增膜板的表面蒸发空冷器换热管束，属于表面蒸发式空冷器的组成部件，特别涉及表面蒸发空冷器换热管束，以有效扩大水膜面积，强化蒸发传热，且不明显增加风阻。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。