1) PVC porous pipe
PVC多孔管
1.
To take as an example the construction of powerless pipeline in Laoshan District of Qingdao, the PVC porous pipes are introduced in details on their capabilities, characteristics and problems in use with which might be faced.
本文结合青岛市崂山区的弱电管道工程,详细介绍了PVC多孔管的性能、特点及施工时须注意的问题。
3) PVC pipe
PVC管
1.
The author suggests that it may use in PVC pipes.
较详细地介绍了有机锑(主要是硫醇锑)热稳定剂的表征及应用范围,同时还介绍了它与其他热稳定剂并用时的效果及用作PVC热稳定剂时的常用配方,建议今后在PVC管材中使用。
2.
Some quality problems occur in PP-R and PVC pipes construction because the material property is not well enough and the connecting technique is uneasy to control.
由于PP-R和PVC管材本身特性不理想,加之施工中的连接工艺普遍不规范并难以掌握,导致一些工程质量问题的发生,因此,文中建议对这两类管材的施工质量应该严格控制,同时还应逐步限制使用。
3.
Described in this article is the design and application of PVC pipes in municipal drainage works.
介绍PVC管在市政排水工程中的设计应
4) PVC tube
PVC管
1.
Application of subsurface drip irrigation with PVC tube to tomatoes in greenhouse;
PVC管地下滴灌系统在温室番茄灌溉中的应用研究
5) porous surface tubes
多孔管
1.
Comparison of physical models of boiling heat transfer of porous surface tubes for heat exchangers;
换热器用多孔管沸腾传热物理模型比较
2.
Study of scaling characteristics on sintered porous surface tubes with copper nickel alloy base in NaCl solution;
烧结型白铜多孔管在NaCl溶液中的结垢性能
6) porous surface tube
多孔管
1.
Aiming at the questions of high energy consumption after the technological modification for enlarging its production,three retrofit schemes are presented:Using a high-efficient lamella heat exchanger instead of the conventional shell and tube heat exchanger,using a high flux porous surface tube in the reboiler,and using a water heat medium preheater to recover three furnaces' surplus heat.
介绍了某厂芳烃歧化装置的工艺流程,针对该装置扩能改造后出现能耗较高的问题,提出了改造方案:采用高效板壳式换热器更换传统的管壳式换热器,再沸器内采用表面多孔管高通量换热管,同时将3台加热炉联合共用1套水热媒空气预热器进行系统改造,可有效地解决现行装置的用能瓶颈,节能效果显著。
2.
In this paper, the heat transfer performance of the pin-fin tube, porous surface tube and smooth tube which are all made of B30 was first researched on the condition of convection.
本文以B30针翅管、多孔管和光滑管为研究对象，以水为冷却工质，对几种管型在对流工况下的换热特性进行实验研究；并根据实验结果，对比各种换热管的传热能力，以寻求实用的最佳换热管，优化换热器的性能。
3.
In this paper,water was used as boiling medium,and the boiling heat transfer characteristics of smooth tube and three other kinds of enhanced tubes including integral pin-fin tube,porous surface tube and winded pin-fin tube were studied experimentally.
整体针翅管表面大量螺旋排列的三维翅片增大了换热面积、延缓了汽泡在壁面附近聚合形成大汽膜,使沸腾换热得到强化;多孔管采用机械方法在壁面加工出大量微细小孔,汽化核心数量和汽泡脱离频率均大幅提高,因此,沸腾换热强化效果显著;绕丝针翅管是一种复合强化手段,兼有整体针翅管和多孔管的优点,沸腾换热强化效果也较好。
补充资料：多孔层开管柱
分子式：
CAS号：
性质：在开管柱内壁上用适当的方法沉积上一层多孔性物质(如硅藻土、硅烷化硅胶、分子筛等)，即为多孔层开管柱。多孔性物质可做吸附剂用，也可做为载体再涂固定液使用。多孔性物质作为载体用的又称涂载体开管柱(support-coated open tubular column)。多孔层厚度约为0.1mm。与涂壁开管柱相比，它的内表面大，柱容量大，固定液流失减少，柱寿命增加。
CAS号：
性质：在开管柱内壁上用适当的方法沉积上一层多孔性物质(如硅藻土、硅烷化硅胶、分子筛等)，即为多孔层开管柱。多孔性物质可做吸附剂用，也可做为载体再涂固定液使用。多孔性物质作为载体用的又称涂载体开管柱(support-coated open tubular column)。多孔层厚度约为0.1mm。与涂壁开管柱相比，它的内表面大，柱容量大，固定液流失减少，柱寿命增加。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条