Archive for December, 2010

An Introduction to Space Frames

References: Space Grid Structures by John Borrego The Design of Building Structures by Wolfgang Schueller (pp521 – 563) Pearce Structures Literature Carnegie Mellon Department of Architecture Third Year Studio Download: http://www.almohandes.org/upload/532SpaceFrames.pdf

17 December 2010 at 22:00 - Comments

Pretreatment of Crude Oil by Ultrasonic-electric United Desalting

Crude oil is a kind of complicated mixture and commonly contains water and a large quantity of salts. Water in crude oil makes the pipeline and the refining processes to be costly and even may cause oil refining process unsteady. Salts, such as sodium, magnesium, and calcium chlorides, in crude oil may corrode the downstream [...]

17 December 2010 at 21:59 - Comments

Pro/Engineer wildfire 3 Tutorial

This lesson will allow you to experience the part, assembly, and drawing modes (Fig. 1.1) of Pro/ENGINEER Wildfire 3.0 by creating two simple parts (Figs. 1.2 and 1.5), assembling them, and creating drawings A bare minimum of explanation is provided here. This lesson will quickly get you up and running on Wildfire 3.0 Download: http://www.almohandes.org/upload/529wildfire-tips.pdf [...]

17 December 2010 at 21:56 - Comments

The Laplace transform

The Laplace transform theory is used to simple solution of circuit analysis instead of complex ananlysis and simple conversions to the s-Domain of circuit elements can be made. Circuit elements can be transformed into impedances, very similar to phasor impedances. Download: http://www.almohandes.org/upload/903laplace.pdf

17 December 2010 at 21:54 - Comments

Internal combustion engines

IC engines: chemical energy to work via internal energy – unfortunately not all chemical energy converted to useful work. Material balances: pollutants production per unit fuel. Heat of reaction: pollutant production per unit energy released. 1stLaw (energy balance): energy split between work, heat etc. 2nd Law of Thermodynamics: nothing can be 100% efficient. Thermodynamic efficiency: [...]

17 December 2010 at 21:52 - Comments