May I know, what is the IEEE Standard used to calculate the heat load from electrical equipment (equipment in electric substation)?
As I go through IEEE Standard 241 that I can found online, I cannot find any calculation inside.
Appreciate if anyone can advise me on this.
Thank you.
Kindly refer to the image uploaded.
May I know, what is the percentage range of the capacity that can be spilled back to the suction of the pump through the recirculate line (restrict orifice located at the recirculate line)?
Can i maximize the capacity of spill back by installing a flow...
Let's say a centrifugal pump is designed to operate at a flow rate of 10 m3/hr with head of 50 m.
If the liquid from the suction is not enough to be pumped (only 5 m3/hr liquid is available):
1) Will the pump still function at the designed rpm?
2) Will the pump capacity still remain as 10...
Is the main reason that suction pressure is lower than atmospheric pressure, is because the liquid level (Static suction level) is lower than the centerline of the pump?
If this situation happen, the most suitable pump to be used is self-priming pump?
Appreciated if anyone can advice and...
Is the suction pressure of a pump, the static pressure, dynamic pressure , hydrostatic pressure or total pressure at the inlet of pump? Or I cannot relate the suction pressure to those pressure?
Suction pressure = suction surface pressure + static suction pressure - suction friction pressure...
Can gauge pressure in a closed tank and vapor pressure of the fluid be cancelled off in calculation of NPSHa?
If yes, what is the condition needed?
What is mean by closed tank? The tank is fully closed and there will be no liquid enter the tank? Or the tank is enclosed but with several pipe...
When we want to apply the Bernoulli Principle, we cannot use the pressure of the fluid, but using the pressure at that particular location?
If yes, how we measure or know the pressure at that particular location? By any calculation from the pressure of the fluid?
If not, the pressure at the...
Is there any pressure drop across an expander for any fluid?
By referring to the "Fluid Mechanics Fundamentals and Applications" by Yunus A. Cengel and John M. Cimbala around page 353, I notice the pressure will increase after expander.
Or can I use the Darcy-Weisbach equation to calculate the...
Assume the flow rate of the fluid is 1 m3/hr and there is 10% spill back. with a total of 1.1 m3/hr flow rate of fluid across the pump.
By referring to the image attached, can I say that the flow rate of fluid at B is the same with that at A (Inlet: 1 m3/hr)?
Appreciate if anyone answer my...
By referring to the image attached, the pressure of the pipe inlet is not sufficient enough for the liquid to travel to the pump.
So, can we use self priming pump in this case?
If yes, how long can a self priming lift the liquid...
Is there any water formed in a closed loop system of refrigerant in a refrigeration system?
I have seen the filter drier used in this system between condenser and expansion valve.
Is the natural cooling process forming water inside the tube of a closed loop system?
