I need to provide intermittent (say 1 hour once ) flow of water into the solar still. For that is there a possibility of using timer circuit or any other electronic devices ?
I would support you suggestion and also would recommend that a flow meter (not a flow control valve) be connected in series with an on/off contact switch that opens the electric circuit when the timer times out (@ 60 minutes). When the circuit opens, the electric current to the flow meter stops and thus the flow meter stops. After 60 minutes, the timer resets and the on/off switch closed the circuit and the cycle continues.
Hope this helps answer your question.
Professor Yehia Khalil
Yale University
USA
Dear karthick please use the solenoid valve for your controlling. solenoid valve combine with an electronic timer delay circuits do your need.
I would support you suggestion and also would recommend that a flow meter (not a flow control valve) be connected in series with an on/off contact switch that opens the electric circuit when the timer times out (@ 60 minutes). When the circuit opens, the electric current to the flow meter stops and thus the flow meter stops. After 60 minutes, the timer resets and the on/off switch closed the circuit and the cycle continues.
Hope this helps answer your question.
Professor Yehia Khalil
Yale University
USA
Dear Karthick Munisamy,
I accept Mr.Immanual Idea, We can use the solenoid valve with timer circuit for Flow control
I Suggest Mr.Yehia F. Khalil opinion , that is highly helpful for you Mr Karthick
Prof. Veeramanikandan,
Is there any programming required to control the water flow ?
dear Karthick Munisamy,
yes, use programme in PLC circuit with solenoid valve.
The solenoid valve with programmable controller is the way to go. Here in our lab we use the Chrontrol controller, which is pretty simple to use, but I'm sure there a variety of options available.
http://hydraulicspneumatics.com/200/TechZone/HydraulicValves/Article/False/6409/TechZone-HydraulicValves
https://www.systemsensor.com/en-us/Documents/Sprinkler_AppGuide_WFAG557.pdf
It is possible but requires adequate understanding of application requirement. This is because water in pipe mass flow rate is dynamic and uncertain. A float ball control valve can be used to automate process or a manual approach of using quick shut valve
Complementing somewhat the answer:
Let´s admit that you have a ball valve with a constant opening AND the flow is constant also (constant net head); in this case, you can simply to control an stop-open cycle, by installing (for instance) a electro actuator that comands open or closed the valve as a function of period that you fix on a timer.
If you need a constant value of discharge with a variable net head and, from time to time, you close the ball valve during certain period, it´s possible to complement the automatism system including a PID closed loop control system and flow measurement as variable to be controled in fuction, for instance, of upstream head.
This kind of control can be done since small valves till large and complex hydro turbines, introducing constant power control and for water discharge amount that can reach 1000m3/s.
If you want give to us some more information of your application and we can suggest some information more concret.
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