Recent content by ENRG

You're the greatest, Thanks for your excellent help.

Are you OK with this calculation? Given: q1 = 5 m3/s h1 = 75 ft = 22.860 m h2 = 70 ft = 21.336 m = 1000 kg/m3 is density of water g = 9.81 m/s2 is acceleration due to gravity Solution: (1) In absence of water in the tank A the power output of the turbine is equal to decrease in...

OK Thanks; I know this is a wide open question; first give me a good source online to help me get approximations; second, based on your knowledge of valves in general and more specifically actuators can I get an opening time within the 1 to 3 second range?

OK gentlemen, Thanks for your input. Please look at the attached doc. let me know if it agrees with your thoughts on this subject.

Please examine the attached ; let me know If this is going in the right direction; Thanks for your excellent help./

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Please consider this drawing to clarify the problem. What else do you need?

I'm working on some calculations now and will share them with you as early as tomorrow. You see why this is a big question mark? Already One says it won't work very well at all, another says it could or might work OK. What information about the turbine would make this issue clearer? In the...

Hello; just need approximations here. 16 inch buttterfly valve with separate environments on each side. side one: clear water at about 8psi; side two: air at about 33 psi; Consider both pneumatic and electric actuatiion under ideal conditions.What is the approximate fastest time to open...

Thanks, I really appreciate your help.

We've established that flow rate must be the same for input and output.I'm simply trying to discharge a hydro turbine 70 feet deep below the surface of the water. Will the rated flow of 5m3/s be reduced in this situation because of the pressure?

OK; I understand; so let's rephrase the above question: If the turbine is submerged and the end of the draft tube is 70' below the surface the water intake/output is the same. How much does the depth of operation reduce intake output? For example: under normal (traditional) conditions...

If the tubine is submerged and the end of the draft tube is 70' below the surface how much is the decrease of Water in/water out?

having a problem here: If a hydro turbine is rated 1 MW @ q=5m3/s with 25 m total head does that mean that the water once through the turbine will also be q=5m3/s? Let's assume that we have ideal maximum conditions including the most efficient nozzles. I have seen some examples where the...

QUESTION: Thank you for assisting a non engineer with a problem. 10,000 pounds of thrust is moving in a verticle path at the rate of one foot per second. This is attached to a horizontal shaft (size not determined) by what ever means necessary to transfer the maximum energy. What is the...