Test series E, October 5th and 6th 2009 at SeaPower Ltd., Galway.
Further tests to improve the chuter and make it more suited for use at sea are shown in the video below.
Test D. Use of chuter to feed air and water. View video.
Newly-developed 'chuter' is used to successfully feed air and water into tube - see video below and read about the theory and the test on the blog page.
Test C. Wave test preparations. View video.
April 8th test. wave frequency was 1.2 seconds; amplitude 150mm, hand-switched solenoids admitted a slug of mains water of 0.4 seconds duration each cycle)
The next step is to demonstrate that while feeding water and air to the intakes, waves alone can move the small air locks forward as per Test B, without any energy input other than the waves. This would indicate that the ICT has the makings of a new, novel, wave power technology. Preparation for this test has included trials of different methods of feeding the air and water to the tube inlet, as described in the attached blogs. - An oscillating water column was made and tried, and latterly bursts of mains water, opened and closed by a hand-operated set of solenoid valves (the method shown on the video).
A report of this test is on the blog. We had been very concerned that we might unknowingly be working outside the useful envelope of tube diameters and lengths, leading to impossible friction losses for instance. In fact the test was most encouraging for the viability of the ITC. Although not fully scientific insofar as the mains water had pressure, it was repeated for a small number of wave amplitudes and periods and leads us to believe that future more engineered tests leading up to longer tubes of higher diameter will be a successful stepping-stone to sea trials.
Test B. Dynamic head test. View video.
This test was to establish that moving a series of air locks forward would cause the air and water to flow out at increased head. A tube was wound on a core which was half submerged in water. The core was rotated with a hand crank, so that the open end of the tube took in water and air successively when it was rotated to simulate the forward impetus of waves. The other end of the tube was taken back through the core and led outside to a height. When the hand-crank was operated the water advanced to up the tube and began to flow from the high end of the tube.
When the cranking was stopped the water fell back but remained at a height about 4 metres above the level of the core. When cranking was restarted the water again advanced up the tube and poured out.
This test is regarded as proving that an accumulation of small heads can be moved forward within the tube to generate a sustained flow at a higher head – the second step in proof of the ITC principle.
Test A. Static head test.
The first of the early tests was to demonstrate that high pressure or head could be accumulated from a series of smaller heads in a wave-contoured tube that contains air locks. It is assumed the ITC hoses will follow the curves of the waves and thus it was important to establish this principle.
This test is taken to be step 1 in proof of the ITC principle.