查询词典 heat transfer

Plate-shell heat exchanger is new equipment of combining the advantage of shell and tube heat exchanger and plate heat exchanger.

板壳式换热器是集板式换热器和管壳式换热器优点于一身的新型换热设备。

By means of numerical simulation in different heat conduction processes, the steady-state temperature field in upper arm skin tissue, the temperature distribution and the burn depth threshold after 15 s exposure to a heat source at 90℃, the surface temperature rising of skin subjected to a surface-applied constant heat flux, and the steady state temperature elevation distribution under the thermal insulation, are obtained.

通过数值模拟，获得了不同皮肤组织结构模型下上臂皮肤组织内的稳态温度场和90℃高温热源作用15 s后皮肤组织内的温度分布，以及皮肤组织热损伤深度的变化、常热流作用下皮肤组织表面的温升曲线和表面绝热条件下皮肤组织内的稳态温升分布。

This paper introduces the selection of the heat relay s type and current its reset mode, points out that connection wire section of rated current of heat relay should be selected according to strict rules it can not take as the protective device of wire short circuit puts forward working environment and temperature of heat relay and matters needing attention of reset after operation.

介绍了热继电器的类型选择、电流的选择、复位形式，指出热继电器的连接导线截面应按规定选择，热继电器不能作为线路的短路保护装置，热继电器的工作环境温度，动作后的复位等注意事项。

By the concrete index and using request of 1 375 ℃ high strength castable refractory , 1 204 ℃ heat insulating refractory, 1 260 ℃ heat insulating refracrory,1 09 3℃ heat insulating refractory and 1 316 ℃ Si castable, the castable refractory for CSP billet soaking furnace is researched, which is acquired the good using effect.

根据CSP薄板坯均热炉用1375℃高强度浇注料、1204℃隔热浇注料、1260℃隔热浇注料、1093℃隔热浇注料和1316℃熔合硅浇注料的具体指标和使用要求，结合国内耐火原料的特点，研制出了满足CSP薄板坯均热炉使用需要的耐火浇注料，达到了预期效果。

The study of the influence of heat insulation layer on the result of deicing or snow-melting illustrates that if the cost of making heat insulation layer is high and the price of the electricity is proper, the heat insulation layer can be abandoned.

通过分析隔热层的存在与否对融雪化冰效果的影响，提出了可以考虑不设隔热层的方案。

Comparison results show that heat pipe work is not continuous but fluctuant in one work cycle about five months,its actual working time is two-thirds of one work cycle,the cooling effect of heat pipe subgrade in winter is obvious,which is good for the contained cool increase of soil body and improves subgrade heat stabilization,there is a decrease for its cooling strength with the increase of horizontal distance,its effective operating radius is 2.25 m,its maximum cooling strength is in evaporation segment in depth direction,which low the thaw sensitivity of permafrost in the seasonal thaw layer about permafrost table.

研究发现，热棒在约为5个月的工作周期内并非连续工作而呈波动式，实际工作时间为工作周期的2/3；热棒路基冬季降温效果明显，有利于路基土体冷储量增加，提高路基热稳定性；热棒在路基中的降温强度，水平方向随距离增大而衰减，有效作用半径为2.25 m，深度方向在热棒蒸发段最大，降低上限附近季节融化层冻土热融敏感性。

The current problems and the corresponding reasons in heat supply network of jilin cancer hospital is analyzed,Top meet the needs of heat supply,the reconstruction project is designed based on the original heat net.

在满足区域内现有及新建建筑物供热需求并兼顾原热网敷设条件的基础之上，提出了热网改造方案，进行了设计。

In rebuilding systems, installs calorimeters and pressure difference controllers at heat entrances, adds evaporative heat meters, thermal static valves and hot water meters on radiators, while in contrasting systems, only sets heating meters at heat entrances.

改造后的系统在热力入口加总热量表、压差控制器，散热器上加温控阀、热分配表、热水表等，对比系统仅在单元入口加热量表。

Product is tetrafluoroethylene - perfluoroalkyl vinyl ether polymer resin by extrusion, blow molding expansion of heat shrinkable tubes, heat shrinkable tube temperature is -80 ℃~ 260 ℃, shrinkage temperature of 180 ℃-250 ℃, the general shrinkage of 30%, it has no viscosity, heat, weathering, corrosion resistance, anti-fouling, and high electrical insulation properties, is a steel bar rubber and silicone rubber coated roll the ideal casing, may be extended roller life, reduced wear and tear, widely used in chemical industry, electroplating, pharmaceutical, printing, papermaking and other fields.

本产品由四氟乙烯－全氟烷基乙烯基醚聚合物树脂经挤出、吹胀成型的热收缩管，热收缩管使用温度为-80℃～260℃，收缩温度为180℃-250℃，收缩率一般为30%，它具有不粘性、耐热、耐候、耐腐蚀、防污和电高绝缘性能，是钢棒橡胶和硅橡胶辊理想的包覆套管，可延长辊筒寿命、减小损耗，广泛地应用在化工、电镀、制药、印刷、造纸等领域。

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。