Hi im am looking for some information on how to calculate the amount of energy created per hour from a spinning fan blade in an enclosed PVC pipe of 6" internal diam and the flow rate of sea water is 2.5m/s
Sorry i have no idea on load. Could you explain. My theroy is that water flowing through a pipe would spin the blade which in turn would produce enery through a genrator of some type
Yes, i could imagine that. In one way it's as simple as the old mill or the drop pool for a hydro-electric plant. That's easy enough to look into. Another way would also be simple but different: Couple your center shaft to your generator and load it down. When it stops that's too much. Electric current pumped at a given voltage equals wattage. Wattage can be directly converted to Horse Power (around 750w = 1hp).
In order to calculate the amount of energy you need to have some type of force. The flow of seawater down the pipe is not enough. The head pressure of the seawater is the force needed. Even if the energy output were calculated this way it would be an ideal calcualtion in practice there are losses. The fan construction, tolerance of the blades to the walls in the pipe all factor in.
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Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Are we talking about tidal flow? If so it not constant.
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Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
My Theroy is to create energy by having water flowing through the pipe hence turning the blade which in turn is attached to a generator which i would hope then to store in battery packs.
The average speed of water in the sea is 2.5m/s with up to 4.5 in rivers.
You've got a 6" ID pipe. And water moving at 2.5 or 4.5 m/s. You'll need to find out the weight of your water collum at your speed. Then you can calculate foot/lbs/sec or whatever units you choose. power = force x velocity
What's the pitch of your blade? If the prop were a screw in wood, how far would it bore in one full turn? Ducted props are efficient as the clearance alows, but there will still be a loss factor. If it were going one foot in one rotation, in a six inch collum that would be easy to calculate 12.214 lbs/ft. using water = .0361 lbs/cubic inch. 3.28 m/f *2.5. Close to 100 lbs/ft/s. 1hp = 550 ft/lbs/s __ 1/55 hp or 13.45w @ 100% effiency
no guarentees on free calculations or advice. i probably missed something.
Several companies such as Carrier are doing this already in food plant, and large building facilities.
Steam is usually the best agent fro propulsion. The reason for this is in practical applications the water colum needs to be very high, unless ussing a large diameter pipe, in both cases ther is the law of diminishing return. Uses more power to pump the water up to the hight in the first place.
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