Computer supported design of vacuum systems: calculation of pumping speed and simulation of pump down: Th Gebele, W Buschbeck and W Schwarz, Leybold AG, PO Box 1555, D-6450 Hanau, FRGdoi:10.1016/0042-207X(88)90504-0ELSEVIERVacuum
Setup of examplary calculation Product: Central vacuum system with one R5 RA 1000 B Production time: 12 h/day (10 h/day production, 2 h/day breaks), 250 days/year Electricity costs: 0.15 €/kWh Comparing a conventional R5 RA 1000 B with a R5 RA 1000 B with VSD Conventional R5 RA...
calculationandexperimentmethodsforpumpingperformanceofasingle 系统标签: 真空泵贯穿vanevacuumpumpingpump 仪器仪表/检测/监控现代制造工程(ModernManufacturingEngineering)2014年第3期 贯穿式旋片真空泵的性能计算与实验分析 倡 郝伟 (广东机电职业技术学院汽车学院,广州510515) 摘要:介绍了贯穿式旋片真空泵的结构及工作原理...
(except for the static one), it is a destructive technique, i.e., the sample is being etched during measurement and cannot be recycled. On the other hand, with compounds whose stoichiometry goes beyond three or four atoms, SIMS is a powerful tool for structural characterization, capacity of...
based on a thermal conversion calculation when the gas pressure in the suction side is about 380 Torr. When the vacuum pump operates with the suction side of the pump being closed, a cooling gas is introduced into a discharge side of the pump to cool its inside. The cooling gas is ...
The high number of very thin layers in the coil requires high calculation costs. Therefore, a simplified 2D simulation model has been developed by implementing a suitable tensor for the thermal conductivity and using mean values for the density and heat capacity. The 2D model was validated by ...
Meanwhile, in the model presented in the literature introducing a semi empirical coefficient, the calculation program has to be adjusted with the operating condition, because the coefficient is relevant to the operating pressure of the feed and permeate flow. It may bring tedious modifications and ev...
This method has advantages such as equipment processing capacity, short operation time, less metal backlog, low energy consumption, small amount of flue gas, and good operating environment. However, the equipment investment is high, and the furnace charge return volume increases the cost of late ...
respectively. Based on the measured flow rate, temperature and pressure, a predetermined calculation is made by the computer such that the control valve 68A controls the flow rate of the air in order to flow the air at the required flow rate or the specific flow rate in the air supply line...
the printing process was initiated by the operator in less than a minute. After the printing was completed, the vacuum inside the chamber was released, and the sample was removed from the build platform. The sample to be used in porosity calculation was taken from the cross-section of the ...