Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. In the system shown schematically below, water is supplied to a spray nozzle by a gear pump with a constant output of 20 US gpm. The flow rate of water discharged through the nozzle is controlled by manipulating the flow of water re-circulated around the pump using a proportional-plus-integral controller. The set point of the controller is normally 14 US gpm but can vary between 9 and 18 US gpm. The flow sensor has a range of 0-20 US gpm and responds instantaneously to flow variations. The control valve has a CV of 3 US gpm/psi1/2, a time constant of 2 seconds, a linear installed characteristic and is current-to-close.
(a) What should be the action of She controller (reverse or direct)? Why?
(b) Would it be better to eliminate the recirculation loop and install the control valve immediately downstream of the pump? Why?
(c) If the pump discharge pressure is 100 psig when the control valve is closed, show that the flow rate across the nozzle is 8 US gpm when the control valve is wide open,
Notes: The valve and nozzle are the only significant flow resistances in this system. You may also assume that the pump suction port and the spray leaving the nozzle are at atmospheric pressure. The nozzle behaves as an orifice.
(d) What are the outputs of the controller and flow transmitter (in %) when the set point is 12 US gpm and steady-state has been achieved?
What is meant by crystal imperfections? Crystalline solids have a very regular atomic structure: that is, the local positions of atoms with respect to each other are frequent a
what is the advantages & disadvanteges of road ways
Consider the cascade loop as shown below: i) Specify the inner-loop gain such that the damping coefficient of the closed loop is equal to 0.4 ii) Derive the ultimate
Hi ! My name is Akash Sharma . and I have completed my BTech (chemical) with 80% marks . I want to teach chemical Engineering subjects . Contact details : Mob. No. 8960386961
What are the functions of oxide layer in high quality IC? Explain. Silicon has the unique ability to be oxidized into silica, which makes a chemically stable, protective and i
a) The vacuum in the headspace of a can of food is normally formed by "hot fill" exhausting - that is, the cans are closed when the can is filled with product at a temperature o
wet chemical synthisis method
Why protons doesn''t react which each other?
to determine the emf of cell uaing pottentiometre
what is titin
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd