reservoir evaporation

A program is coded to simulate the water evaporation on airway surface and heat transfer between wet airway surface and airflow.

对计算潮湿巷道中风流温度和湿度的方法进行改进,提出将饱和空气含湿量与温度的关系拟合为二次曲线计算巷道壁面水分蒸发的方法,编制模拟潮湿巷道中风流与围岩热交换和巷道壁面水分蒸发的计算机程序,解算出风流温度及湿度的变化规律。

Wetness factor was adopted to deal with the water evaporation on airway surface.

笔者采用湿度系数法对壁面水分蒸发进行了处理,对计算壁面处饱和空气含湿量的方法进行了改进,将饱和空气含湿量与温度的关系拟合为二次曲线;建立了在考虑壁面水分蒸发情况下解算巷道围岩温度场分布及围岩向风流的散热量的数学方程,并采用异步长有限差分法对其进行了数值模拟求解;解算出巷道壁面水分蒸发情况下围岩温度分布、壁面温度和围岩散热量的变化规律;并与将饱和空气含湿量与温度的关系拟合为线型关系曲线时的解算结果进行了对比,将饱和空气含湿量和温度之间的关系拟合为线性的计算结果存在一定的误差,通风时间越长,湿度系数越大,风流相对湿度越小,拟合为线性时计算出来的壁面温度和围岩散热量的误差越大。

A general mathematical model for investigating simultaneous heat and moisture transfer and water evaporation in porous soil with unsaturated and dry regions was proposed by considering of the temperature effect on soil moisture migration, based on the volume - averaging method and a set of governing equations were developed.

考虑温度对土壤湿分迁移的影响,建立描述存在干饱和层时的土壤热湿传递的数学模型,并就自然环境和恒定太阳辐照下两种情况进行数值模拟,获得不同环境条件下土壤中温度和湿分分布以及水分蒸发的动态特性,分析干饱和土壤层对土壤热湿迁移与水分蒸发以及温度对土壤湿分传输的影响。

The water evaporation and plastic-shrinkage cracking of cement mortars with different mix proportions were studied using concrete brick as base material.

以混凝土小砌块为基板,研究了不同配比砂浆表面的水分蒸发和塑性收缩裂缝情况,结果表明:随着胶砂比和水胶比的减小,水分蒸发总量和水分蒸发速度逐渐减小,塑性收缩裂缝出现较早,裂缝数量及裂缝总权值均有所减小;掺加聚丙烯纤维后砂浆表面的水分蒸发总量和水分蒸发速度等都有所下降,塑性收缩裂缝出现较晚,裂缝数量和裂缝总权值也显著减少;砂浆表面的水分蒸发越快、蒸发量越大,砂浆越容易出现塑性收缩裂缝,且裂缝总量也较大;当砂浆表面水分蒸发速度小于0。

To study the influence of the content of fly ash and slag and the proportions of slag-fly ash on the early-age restraint cracking behaviors of concrete,the cracking behaviors of concrete was analyzed combining the test of the evaporation capacity and electrical resisitivity of the concrete using the modified flat-type specimen.

为了研究粉煤灰、矿渣掺量及其复掺比例对混凝土早期约束开裂性能的影响,本文采用改进的平板法进行混凝土早期约束开裂性能的试验研究,同时结合水分蒸发量和电阻率试验进行混凝土开裂性能研究分析。

Based on nature evaporation experimentation with artificial controlled precipitation, the evaporation and availability of soil water to plant under 50% cover rate conditions with four types of mulch materials, including plastic film, water permeable plastic film, hay and sponge plastic sheet, were studied.

采用旱棚人工控水,蒸发桶整体称重法,对4种地面覆盖材料、50%覆盖度条件下,土壤水分蒸发与移动性能进行了研究。

Reasonable utilization evaporating water retun and lowering production energy consumption;

合理利用蒸发回水 降低生产过程能耗

evaporation suppressant

土地水分蒸发抑制剂

Extracting can also be done by partially freezing the salt solution.

加热蒸馏法是将盐水加热，使水分蒸发，然后再使蒸汽冷凝成水。

The sun will take the moisture out of the clothes.

太阳光会把衣服上的水分蒸发掉。

Effects of Conservation Tillage on Soil Evapotranspiration in Spring Wheat Fields

不同保护性耕作措施对旱地春小麦田土壤水分蒸发蒸腾的影响

Research on the Retardation of Water Evaporation of C_(16) OH/AEO-3 Mixed Monolayers

C_(16)OH/AEO-3混合分子膜抑制水分蒸发的研究

spiration and water use efficiency

蒸发蒸腾作用与水分利用率

Research on the Relationship of Water Evaporations Between Two Different Evaporators

不同蒸发器水面蒸发量相互关系分析研究

Determination of Chemical Constituents of Essential Oil from Myrrha by GC-MS;

水蒸汽蒸馏法提取没药挥发性成分的GC-MS分析

Most of atmosphere's water vapor comes from evaporation of sea water.

大气中的水汽大部分来自海水蒸发。

Evapotranspiration may deplete the soil moisture and rob supplies of ground water.

蒸发蒸腾作用能消耗土壤水分，减少地下水的水量供应。

milk concentrated by evaporation.

通过蒸发使水分消失的牛奶。

Performance Analysis of LT-MED Plants;

低温多效蒸发海水淡化装置性能分析

Impact of E_0 value on calculation accuracy of phreatic evaporation empirical formulae;

E_0值对潜水蒸发计算精度影响分析

Experimental Study on the Liquid Distributor and Heat-Trasfer Performance of Horizontal Tube Falling Film Evaporator;

水平管降膜蒸发器液体分布装置与蒸发传热性能的实验研究

Analysis on the Variation Trends of Evaporation from Water Surface Different Evaporators in the Northwest Tarim Basin, Xinjiang;

塔里木盆地西北部不同类型蒸发器水面蒸发变化趋势分析

Perspiration: Fluid given off by the skin as vapour by simple evaporation or as sweat actively secreted from sweat glands to evaporate and cool the Body.

出汗:由皮肤排出自表皮直接蒸发成蒸气的水分或由汗腺分泌并蒸发以冷却身体的液体。

Experimental Research on the Soil Moisture Movement of the Water Storage Pit on the Condition of Evaporation;

蒸发对蓄水坑灌土壤水分运动影响的试验研究

Effect of Simulation Water Supplement Methods on Useless Evaporation of Soil Water

模拟补水方式对土壤水分无效蒸发的影响