That trial found that at length equal to 26.2 cm effective length is the length of the tubing, the flow rate of 100% of the outgoing air to the incoming air, and minimal power consumption. By the pipe length should be less than this value. But nevertheless, the waste of energy due to the length of the pipe, duct length, efficiency is less than 100% will not charge more than the outgoing pipe as pipe bend 90°. In addition, if the pipe length is greater than the length of the pipe length 100% efficiency, the wind speed, the more outgoing and incoming power than, for example, this same trial results consistent with the theory.
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