Recent content by mattpbarry

I wrote a program to calculate the efficiency of various pipe diameters. For a 100kW system which pipe diameter would you choose? Again I don't know what the rivers total flow is but its about 8m wide, 1m deep and fairly rapid. Diameter: 5" Friction Factor: 0.018 Flow Rate...

Ok so if I use and emax of 60% then I get a max of 76.4kW. What is the Darcy friction factor for an 8" pipe?

And if I plug it into my other formula I get P = ( 260 (l/sec) * 50 * 1 )/102 and therefore I sould have a max generation capacity of 127.45kW

So 50 = 0.015 x 50/0.154051 (inches to m) x v^2/2(9.8) gives me a solution of v = 14.19 m/s and so Q = v x pi x r^2 which is 14.19 x 0.0182 which gives me a flow rate of 0.26 m^3/s. Am I correct?

Hi all, Basically I need help working out how much energy we can potentially produce. We have a waterfall 50m high that has a constant year round flow. We would take off water into a 6" vertical steel pipe at the top and run it to the bottom into a turbine. I don't know the friction of the...

Seriously? I don't think we have any four stroke engines.

I'm 16. This is definitely a challenging endeavor. My father is a farmer with some mechanical background and we are going to be speaking to a friend of his who is a mechanical engineer. As far as budget goes the engine will come from an old brush cutter of ours so the major cost is taken out. We...

For an upcomming science expo my friend and I are attempting to modify a small engine (such as found in a brush cutter) to run of hydrogen. We do however have a number of concerns and was wondering if anyone would be able to help. Firstly should we run it off tanked hydrogen and air or should...