湿空气

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

Humidification humidifier main role will be a very good air-conditioning temperature and humidity in order to achieve the best results.

加湿器的主要加湿作用将会很好的调节空气的温度和湿度，以达到最理想的效果。

They are of the hygroscopic type, able to recover winter moisture from the exhaust air and thus reduce the load on the supply air humidifiers.

它们是吸湿型的，能够减缓冬季排气所带来的湿气，因此降低对辅助空气吸湿器的负担。

Thorough is pure is the beautiful flesh important step, Xantia deep cleaning oil can the dismantle dirty air and the color, specially has the acne the pore spot, has the in-depth clean effect, Glycol, Algae Extrac and Corallina Officinalis Extract.The tiny member can instantaneous seep 〝the base first floor〞to achieve activates the flesh, highly effective guarantees the wet function banana plant oil, Aloe oil level approximate human body sebum natural to guarantee the wet protective layer, after prevented washes the face the moisture content to drain.

彻底洁净是美丽肌肤的重要步骤，Xantia深层洁颜油能够卸除脏空气及彩妆污垢，特别是有粉刺的毛孔部位，具有深层清洁的效果，海洋微量元素、海藻萃取液、珊瑚萃取液微细的分子能瞬间渗透到「基底层」达到活化肌肤、高效保湿功能；荷荷芭油、芦荟油形成一层近似人体皮脂的天然保湿防护膜，防止洗脸后水分流失；加入镇定、舒缓肌肤的薰衣草精油，达到深层清洁、去除角质、温和洗净、舒缓肌肤等四大功效。

Air dryer is a mechanical equipment which can make the moisture(generally means water or other evaporable liquid) in material change into vapor and evaporate by heating, so that the solid material can reach the required humidity ratio.

空气干燥器是通过加热使物料中的湿分(一般指水分或其他可挥发性液体成分)汽化逸出，以获得规定湿含量的固体物料的机械设备。

Based on the heat and moisture transfer through porous media, a 1-D transient hygrothermal model for multilayer wall were established by using air humidity ratio and temperature as driving potentials.

以多孔介质传热传质学为基础，以墙体内的空气含湿率和温度为驱动势建立了多层墙体中的一维瞬态热湿耦合传递方程。

Under different air temperature and relative humidity conditions, when protracting the moisture adsorption time, the moisture content increase and influences of initial moisture content, temperature and relative humidity on rice cracking caused by moisture adsorption were studied.

05% 的早稻83007处在不同空气温度和相对湿度条件下，随着吸湿时间的延长，稻谷含水量的变化及其原始含水量、温度和相对湿度对稻谷吸湿产生裂纹的影响。

The NO .5090"Multi.1ayer corrugated superposed fiber mat"mesh screen has a very good pedorrnance 0n filtering the dust in the air,you can install an add itional mesh screen on the machine if there is a serious pollution outside,during the using,the mesh screen will be swilled by the lowing water and there Will be a flowing waterfilm on the surface,then it can do clearing by itself,based on these,flitering and temperature cooling functions can be obtained"NISSIN"energy—saving and nonpolluting air conditioner is suitable for the op ening environment,S ternperature cooling because fresh air and Cooled air can be directly transferred inside.

5090型&多层波纹纤维叠合物&湿帘对空气中的微尘具有良好的过滤性能，如室外严重污染，可外加过滤网，湿帘经自来水冲刷表表面形成水膜，可自行清洁，因而实现洁净与降温。&日新&节能环保空调机适用于开敞式环境适用，能够直接输送自然风及输送经降温的凉风。

The heat and moisture absorbing and desorbing of envelop surface in underground hydropower station plants are influenced by indoor heat and humidity parameters and air flow velocity, besides, they are also influenced by physical properties, temperature and humidity of rocks.

水电站地下厂房围护结构表面的热湿吸放一方面受室内热湿参数和空气流动速度的影响，另一方面受围岩物性及温湿度的影响。

Oh, there is another option: some moisturizing ingredients known as a humectants are not oils and they work by attracting mosture from the air.

哦，还有另外一个选择：某些含保湿成分的保湿霜并不含油，它们能从空气中吸收水分。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。