hw_8_2006_solution

# hw_8_2006_solution - ∆ P does have the necessary units of...

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ChE 3015 Homework #8 – Due on Class #21, Monday 3/13/2006 Sensors and Transmitters 1. Work problem 9.1 on p.221 of "Process Dynamics & Control" (PD&C) by Seborg which is the second page of this assignment. 2. Work problem 9.2 on p.221 of PD&C by Seborg which is the second page of this assignment. Note: (i) There is a typographical error in the problem statement in PD&C. The pressure drop-flow rate relation as stated in PD&C is: P 0 = [ q / q ] 2 where q is stated to be "a characteristic flow rate…". This equation does not have consistent units. Instead of using this equation, use the following in solving this problem: P 0 = C 1 (q) 2 where the constant C 1 has units of psig/[(gal/min) 2 ]. This will ensure that the pressure drop

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Unformatted text preview: ∆ P does have the necessary units of psig. (ii) In part (b) of this problem, you will not have to specifically calculate the value of the constant "K" by itself. Rather, what you should calculate are the numerical values of the product "KC 1 " and "K(C 1 ) 0.5 ". (iii) In part (d), in addition to making the sketch that is called for, derive an expression for the transmitter gain for the two cases. 3. Work problem 5-2 from Smith & Corripio on the third page of this assignment. This concerns safe operation of storage tanks. 4. Work problem 5-3 from Smith & Corripio on the third page of this assignment. This concerns safe and proper operation of a temperature controller....
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