Second design

Results The results of computer calculations are summarized for the two operations by Figs. 23-4 and 23-5. In the second design, the equations had to be modified to take account of two feeds with different specific rates. 

The second design consideration is the dead time associated with the PWM control signals. The dead time is determined by the device turnoff time and snubber decay times. Catastrophic GTO failure would occur if both devices in one halfbridge were to conduct simultaneously. The PWM control software was modified to produce a conservative 15-/ts dead time. 

One possible method of automatic optimization was mentioned by Kahn (Kl) quite some time ago. This used the Monte Carlo technique to make a random design of cases over a broad area known to contain the optimum. After a limited number of cases had been calculated, the best case was selected and another random design of cases was made. For the second design, however, the dispersion of cases was reduced so that the investigation became more localized. After a sufficient number of repetitions of this process the optimum would be determined to a sufficient degree of accuracy. The method is perhaps the antithesis of a logical or orderly calculation procedure, but it can be programmed for automatic sequential calculation. 

The first design has a slightly curved serpentine channel comprising square columns. The second design is an arrow-shaped channel [159], Circular holes, two before and one after the mixing channel, serve as fluid reservoirs for both designs. 

Condensation polymers based on an amide linkage have also found considerable commercial applications. For example, when the salt of adipic acid and hexamethyl-enediamine is heated to 270°C, a polyamide known as nylon 6,6 is formed. (The first number in the name of the nylon designates the number of carbons in the diamine, six in this case, and the second designates number of carbons in the diacid, also six in this case, that are used to form the nylon.)... 

---