冷却器和冷凝器的最佳冷却水出口温度

导出了冷凝器和冷却器的总费用最低时的冷却水出口温度的计算公式，附有计算示例。

扩大圆锭结晶器冷却水出口区

在过去的几年中，圆锭结晶器已有了几次改进。尽管这些改进主要限于结晶器，但却改善了整个铸造系统的效能。双排喷水孔可增大冷却水的喷射角和喷射速度，减少冲击铸锭后飞溅离开铸锭表面的水量。这些改进提高了二次水冷效果，允许在铸速相同的情况下采用更长的结晶器膛。由于这种结构的结晶器冷却效果提高，故在水温一定的条件下，可减少冷却水的用量。石墨环结构及其材质的改进使铸锭质量提高，结晶器维修工作量减少。这种双排射流结晶器可制成一体式。

凝汽器冷却水出口管加装电动调节蝶阀的可行性

引进前苏联 30 0MW超临界机组主机凝汽器冷却水系统 ,循环泵电机采用双速电机 ,凝汽器冷却水出口管路没有加装调整流量阀门 ,根据近几年运行情况及同类型电厂运行情况 ,存在问题有一定共性 ,且双速电机调整水量有限 ,节电潜力不大 ,经多次试验论证 ,决定在 2台机组凝汽器冷却水出口管加装调节蝶阀。此项节能技改项目是成功的 。

管壳式换热器适宜冷却水出口温度的确定

本文以年操作费用和年折旧费用之和最小为目标函数，以冷却水出口温度为设计变量，得出了管壳式换热器适宜冷却水出口温度，并利用Turbo C语言编制了相应的优化程序。结果表明，此法较常规设计方法可节省费用8%～10%。

开式地表水地源热泵系统冷却水取水温差研究

结合涪陵地区某地表水地源热泵工程实例,建立了冷却水泵和热泵机组能耗模型,分析了冷却水进出口温差对冷却水泵及热泵机组性能的影响,得出系统总能耗最小时的冷却水最佳进出口温差为8.1℃,相应的节能率为4.5%～6.5%。

焦化煤气终冷工艺设备改造的理论与实践

1 改造前状况目前,焦化行业煤气终冷设备多采用隔板式终冷塔,煤气的冷却方式为直冷式,即用工业水从塔顶直接喷洒。

向能源管理要效益——大远公司“飞云岭”轮主机改烧燃油纪实

向管理要效益,这是每个企业所追求的,而在航运持续低迷的今天,我们又是怎么做的呢?航运企业的管理是多方面,在此介绍占总成本支出三分之一的燃油管理,并以"飞云岭"轮主机改烧重质燃油的工作,向大家展示一个成本控制的例子。

The Effect of Blade Outlet Angle on Performance and Internal Flow Condition of Mini Turbo-Pump

Mini turbo-pumps having a diameter smaller than 100mm are employed in many fields;automobile radiator pump,ventricular assist pump,cooling pump for electric devices,washing machine pump and so on.Further,the needs for mini turbo-pumps would become larger with the increase of the application of it for electrical machines.It is desirable that the mini turbo-pump design is as simple as possible due to restriction to make precise manufactures.But the design method for the mini turbo-pump is not established because the internal flow condition for these small-sized fluid machineries is not clarified and conventional theory is not conductive for small-sized pumps.Three types of rotors with different outlet angles are prepared for an experiment and a numerical analysis.The performance tests are conducted with these rotors in order to investigate the effect of the blade outlet angle on performance and internal flow condition of mini turbo-pumps.It is clarified from the experimental results that head of the mini turbo-pump increases and maximum efficiency flow rate shifts to larger flow rate according to the increase of the blade outlet angle,however the maximum efficiency decreases with the increase of it.In the present paper,the performance of the mini turbo-pump is shown and the internal flow conditions are clarified with the results of the experiment and the numerical flow analysis.Furthermore,the effects of the blade outlet angle on the performance are investigated and high performance design with simple structure for the mini turbo-pump would be considered.