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?
full process of ammonia synthesis
what do i do to eliminate odor from cowdung?
explain the identification of organic compounds basing on the structural theory
Explain Dipole Relaxation Dipole Relaxation is the method, occupying a specific period of time after a change in the applied electric field, in which the orientation polariza
Ion implantation equipment typically having of an ion source, where ions of the desired element are produced, an accelerator, where the ions are electrostatically accelerated to a
prove that work is a path function
merits and demerits of free radical polymerisation
Explain the various steps required in the fabrication of an integrated circuit. Lithography: The method for pattern definition by applying thin uniform layer of viscous liqui
consider a system at 290k for which the enery of the nth state is En=n(0.01ev) using 1+a+a square+ a cube+...=1/(1-a), find the value of partition function.find the constant C in P
Consider a heat-exchanger control loop with no dead time. It is controlled by a PD controller. The rate time is 0.25 min. A real PD controller is used with filtering where a = 0
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