查询词典 heat flow

Examinations of steady status and analysis of dynamic experiments have been conducted on Band-Tube evaporator and Parallel-Flow condenser using R134a refrigerant. The steady examination show that the model error was under the allowable error, The inlet mass and enthalpy disturb experiments indicate that the subsection model ,be good at reflecting the change of parameters of the heat exchanger, accord with the basic principle of thermodynamics theory and the actual work status.

在进行仿真试验时，以使用R134a作制冷剂的管带式蒸发器和平行流式冷凝器为对象，完成了稳态仿真计算、试验和动态仿真分析，稳态计算结果和试验数据对比表明，其误差在允许范围内；进口质量和焓值的扰动试验结果表明：本文所建的区段式换热器仿真模型，能很好的反映换热器性能参数的动态变化，与系统热动力学理论和冷凝器、蒸发器的实际工作过程基本一致。

From energy balanceequation, using micropiece analytical method, heat balance equation for high power fastaxial gas flow CO2 laser tube is established.

从能量守恒定律出发，分析了快速轴向流动激光器放电管中的传热情况。采用微元分析法建立了快速轴向流动激光器放电管的热能平衡方程。

From energy balance equation, using micro-piece analytical method, heat balance equation for high power fast axial flow CO〓 laser tube is established with the boundary conditions of actual fast axial CO〓 laser, the analyzed solution of the temperature distribution in the laser tube is obtained.

并应用热传导的物理边界条件，求出了热能平衡方程的解析解，得到了实际器件放电管横截面内的气体温度分布公式及温度分布曲线，并求得了激光功率变化对热致负透镜焦距的影响关系式。

The effect of the inlet parameters of air, air mass flow rate and spray water rate on the performance of closed cooling tower is discussed in the paper. A mathematical model for evaluating heat and mass transfer performance of closed cooling tower is set up. The analytical solution of differential equations is derived.

目的 分析闭式冷却塔内各参数，即空气焓值、含湿量、冷却水温等的分布情况；探讨空气入口参数、空气质量流量、喷淋水量对闭式冷却塔冷却性能的影响规律。

Under the condition of anthropogenic heat investigation, the velocity and temperature profiles measured with three-cup anemoscope and hygrothermograph and the surface air temperature profile calculated by CTTC model, the distribution of flow and temperature fields were simulated.

以对小区内的人为热估算结果作为内热源，对西安市典型小区测量获得的风温廓线和利用改进的CCTC模型计算获得的小区地表温度分布作为主要边界条件，计算分析了小区流场和温度场的时空分布规律。

The numerical results are analyzed based on the field synergy principle to explain the inherent mechanism of heat transfer enhancement by longitudinal vortex, namely second flow generated by the vortex generators causes the reduction of the intersection angle between the velocity and fluid temperature gradient.

结果发现纵向涡强化管－翅表面换热的内在机理可以用场协同原理进行解释，即纵向涡发生器使全场速度和温度梯度之间的平均夹角减小。

Described the design of supercritical fluid extraction principles; combination of star anise essential oil of the nature of the proposed extraction conditions for extracting pressure 15MPa, extraction temperature 40 ℃, CO2 flow rate 830 ~ 850L / h, extraction time of 2h, the extraction conditions selected temperature swing separation, further development of the star anise crushed, CO2 super-critical phase transition, extraction, separation and packaging processes; in determining the production process on the basis of material balance, heat balance, extractor size calculation, piping calculation and packaging process is calculated; for the pollution occurred during the production, analysis of pollution sources, pollution control and waste treatment proposed measures; accounting of production costs and value.

本设计阐述了超临界流体萃取技术的原理；结合八角精油的性质，提出萃取条件为萃取压力15MPa，萃取温度40℃，CO2流量830～850L/h，萃取时间2h，根据萃取条件选用变温变压的分离方式，进一步制定了八角粉碎、CO2超临界相变、萃取、分离和包装等工序；在确定的生产工艺流程的基础上进行物料衡算、热量衡算、萃取釜尺寸计算、管路计算和包装工序计算；针对生产过程中出现的污染，分析污染的来源，提出控制污染和废料处理的措施；核算生产的成本和价值。

Author has described the existing problems in the production after being changed from cylindrical gasifier to conical gasifier from aspects of pressure drop of system,material balance,heat balance,slag transition area,ash tray diameter,flow protection plate,entrainment under gasifier and gasification strength etc.

从系统阻力、物料平衡、热量平衡、炉渣过渡区、灰盘直径、防流板、炉下带出物、气化强度等方面阐述了造气煤气炉由直筒形改为锥形炉后生产中存在的问题；论述了煤气炉阀径与工艺流程的选配原则；阐明了锥形煤气炉的生产水平低于直筒形炉气炉的观点。

We did our best to get the optimal methods to make the liquid more atomize, and established a model for gas-liquid mass and heat transfer process of cross-flow RPB.

根据气液两相流在多级离心加速雾化条件下流体的动量与质量方程，分析研究液体的雾化程度、液滴粒径、运动速度与方向、停留时间等，研究液相多级分散的级数、分散方式以及离心力场强度对气液相界面积、传质系数以及气相流阻的影响关系及其规律性，探讨沿旋转床径向使液体均匀雾化的最佳方法，建立旋转床中气液两相的运动与传质数学模型。

First, calculate matrix equation of the auxiliary steam,draw heat distribution based on energy conservation. Then through modules division of the thermal system, calculated distribution of energy loss using energy analysis system, and draw a flow diagram.

首先由建立的考虑辅汽的矩阵方程进行计算，得出以能量守恒为基础的热量利用分布；进而通过热力系统单元的划分，利用火用分析法计算得出系统的火用损失分布规律，并绘制出火用流图。

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。