玉米
发表于 2025-3-28 15:52:33
Objektorientierte Programmierung in Oberon-2ich ensure that the pump operates in the range between the allowable minimum and maximum flow – in particular if pumps are operated in parallel. Proper procedures must be implemented for start and stop. Transient operation and unsteady phenomena which need attention include: dynamic instabilities ca
Corral
发表于 2025-3-28 20:15:48
http://reply.papertrans.cn/23/2233/223226/223226_42.png
的’
发表于 2025-3-29 00:14:17
Objektorientierter Systementwurf,, but efficiencies drop to very low levels which make the operation highly uneconomic. Large amounts of free gas entrained in the liquid seriously deteriorate performance and restrict the range where pumping is possible at all. Centrifugal pumps can handle large amounts of solid matter even though t
Licentious
发表于 2025-3-29 06:54:28
https://doi.org/10.1007/978-3-642-97422-9. This could be avoided in most cases by a careful material selection. Frequently one of two causes can be made responsible for a wrong material selection: (1) the corrosive properties of the liquid pumped are not clearly specified (or are unknown), or (2) for cost reasons (competitive pressure) the
尽管
发表于 2025-3-29 10:33:06
http://reply.papertrans.cn/23/2233/223226/223226_45.png
观点
发表于 2025-3-29 12:15:37
https://doi.org/10.1007/978-3-642-96908-9This chapter deals with the calculation methods essentially common to all impellers and diffusing elements regardless of the specific type. The details of calculation and design of the various types of impellers and collectors are discussed in Chap. 7.
该得
发表于 2025-3-29 17:30:28
http://reply.papertrans.cn/23/2233/223226/223226_47.png
跟随
发表于 2025-3-29 19:58:38
Objektorientierte Programmierung in Oberon-2Table 17.1 provides the properties of saturated water. They are rounded. In the liquid phase the properties depend little on pressure. The values from the table can therefore be used approximately also for pressures higher than the saturation pressure: at a pressure of 1000 bar the water density is about 4–5 % higher than the saturation pressure.
思考
发表于 2025-3-30 01:45:42
Pump Hydraulics and Physical Concepts,This chapter deals with the calculation methods essentially common to all impellers and diffusing elements regardless of the specific type. The details of calculation and design of the various types of impellers and collectors are discussed in Chap. 7.
Lymphocyte
发表于 2025-3-30 06:59:44
Pump Selection and Quality Considerations,Operational problems can often be traced back to a non-optimum—or even downright wrong—pump selection. An unsuitable selection may result from insufficient knowledge of pump operation and installation conditions or from not giving them careful consideration and analysis.