50 Green Projects for the Evil Genius by Shariff Jamil

Author:Shariff, Jamil
Language: eng
Format: epub
Publisher: McGraw-Hill
Published: 2009-08-16T04:00:00+00:00

• www.activepower.com—a commercial non-chemical, battery-based uninterruptible power supply that uses stored heat to improve the air pressure conversion efficiency.

• quasiturbine.promci.qc.ca—an innovative engine that runs off of compressed air without using traditional piston or turbines, rather a combination of the two, and which has been used to power a small go-cart.

Project 31: The Spiral Water Pump

The spiral water pump is quite an old idea that hasn’t had much widespread use. It demonstrates several interesting concepts: water piston, air pressure, and air and water transmission over distances. There are two parts to this project: the first is a water wheel, the one from the last project will do nicely to demonstrate; the second part is to build a spiral pump and affix it to the water wheel. When completed, we will send the compressed air and water up a hill, and separate the compressed air and water, so they can each do some useful work. The compressed air can be used to turn an air motor and the water can be used either as a source of running water or sent down the incline through a turbine.

It is useful to understand the concept behind this pump before starting to build it. The pump intake and compressor are both formed by a large spiral that is attached to the side of the water wheel. The spiral can be made out of rigid plastic pipe. The end of the spiral at the large end of the spiral should be positioned so that it gathers water as the moving stream turns the wheel. As the wheel turns with the spiral attached to it, the spiral gathers water during the first half of the rotation, then air during the second part of the rotation. Each rotation of the wheel pushes successive alternating batches of air and water into the spiral, which are squeezed into a tighter and tighter space in the parts of the inner spiral that have progressively smaller diameters. Because water doesn’t compress very easily, the air compresses in the spiral.

At the center of the spiral, the alternating air and water “pistons” inside the plastic tube are turned 90° from the wheel and sent through a pipe up an incline. Air expands to push pistons of water up an incline, where the water and air can be separated. There may be enough air pressure to turn an air compressor and generate electricity. The water can either be used for other purposes, having been pumped up an incline, or can be sent back down the incline and used to generate power.

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