Process Dynamic and Control Question 3. A circulating cooling water system is used for the coolant in a shell and tube heat exchanger.The cooling water is first pumped through a refrigerated cooler and then through the heatexchanger. At the design flow rate of q = 400 gpm, the water pressure drop through therefrigerated cooler is 10 psi, and the pressure drop through the heat exchanger is 15 psi. Thewater pressure drops through the refrigerated cooler and heat exchanger are proportional tothe flow rate squared. The water supply pump discharge pressure in psig is given by thefollowing equation to overcome losses in the cooler, heat exchanger and control valve:P = 80 - 2 x 10 -> q 2(a) Determine the valve coefficient C if the required maximum water flow rate is 1.6 timesgreater than the design flow rate.(b) Consider a control valve with linear trim and equal percentage control valves with R =20 and R = 50. Compare the three control valves by plotting the installed valvecharacteristics (q vs. ). Which valve would you recommend and why?

The flow capacity of a control valve under completely open circumstances in relation to the pressure…

P = 80 - 2 x 10 (a) Determine the valve coefficient C if the required maximum water flow rate is 1.6 times greater than the design flow rate. (b) Consider a control valve with linear trim and equal percentage control valves with R = 20 and R = 50. Compare the three control valves by plotting the installed valve characteristics (q vs. ). Which valve would you recommend and why?

P = 80 - 2 x 10 (a) Determine the valve coefficient C if the required maximum water flow rate is 1.6 times greater than the design flow rate. (b) Consider a control valve with linear trim and equal percentage control valves with R = 20 and R = 50. Compare the three control valves by plotting the installed valve characteristics (q vs. ). Which valve would you recommend and why?

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...

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