Download Electrical Drive Control: Textbook with Applicative Aspects by Zeev Bahir PDF

By Zeev Bahir

This ebook is meant for college students within the disciplines of electric engineering, mechanical engineering, keep watch over engineering, etc.
It is phrased in businesslike, easy English. It makes for simple studying fabric, as a result of abundance of solved problems
and issues of solutions, to be solved by means of the students.
The theoretical key issues, solved difficulties and the issues to be solved by means of scholars seek advice from events as just like real-life
industrial occasions as attainable.

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Extra resources for Electrical Drive Control: Textbook with Applicative Aspects

Example text

They help in investigating the effect of: • boosting and the electrode arrangement on the heating and flow patterns in the melt; • the length-width-depth ratio of the tank; • the presence of a weir or dam and the position of the weir; • application of forced bubbling; • segmentation of the melting tank in a melting, fining and refining or conditioning zone; • the shapes and dimensions of neck and throat; • the type of charging machines and doghouse design; • the deep refiner zone and of • stirrers and cooling bars, on the temperature field and the flow patterns, in particular on the shortcut flow path or the value of the minimum residence time.

Detailed Combustion and Radiation Modeling in the Combustion Space. Sophisticated combustion models calculate the local composition of the fuel-air or fuel-oxygen mixture (often taking into account statistically determined fluctuations in the mixture composition with time) as well as gas expansion and flows. The combustion reactions (assuming local equilibrium or certain reaction kinetics) release energy. This energy is transported by radiation and convection to the environment (walls, glass melt, batch blanket, local gas in the combustion space); the exhaust gases transport heat from the combustion space to the heat exchangers of the furnace.

This cordstretching process, which is caused by the velocity gradient in the melt, can enhance the homogenization process by one order of magnitude or even more. The time required for obtaining a melt without non-dissolved sand grains, for the homogenization of a cord-rich glass, or for the removal of bubbles/seeds during fining can be estimated by applying the basic equations describing the dissolution of sand grains or the bubble growth in static or flowing glass melts. 21)). The minimum time required for these intermediate processes and a given set of raw-material parameters (grain size R, glass composition, raw material component concentration in the batch, concentration fining agent) depends on the viscosity, diffusion coefficient (of gases, Si0 2, or cord components in 26 2.

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