AquaBuOY scale 1:10 - Energinet.dk

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significant wave heights up to about 1 meter compares well to a scale test of 1:10 and this ratio was chosenfor the test.Physical dimensions:Parameter Model Scale factor Full scale10Float diameter 0,7 meter 10 7Float height 0,48 meter 10 4,8Displaced volume 185 litre 10 3 185 m 3Accelerator tube diameter 0,46 meter 10 4,65 meterAccelerator tube length 3 meter 10 30 meterRated absorbed Power 86 watt 10 3,5 273 kWSignificant wave height (at rated power) 0,5 meter 10 5 meterAverage wave period (at rated power) 2,3 seconds 10 0,5 7,5 secondsChoice of model Fabrication and MaterialThe scale model is constructed in PVC and build by Brønnum Plast using as far as possible standard tubedimensions as shown on the photo below. The lower bulb on the tube was designed to reduce the dragresistance of the heave motion.The PVC model of the AquaBuOY in scale 1:10,Left: the float and the by-pass section,Right: the lower part of the acceleration tube with the bulb below.5
Choice of end-stop solution the by-pass sectionThe bypass mechanism was invented by IPS to avoid overload on the linear power take-off in case thecenter piston moved outside its working area. The by-pass solution consisted of a working area for the pistonwith a slightly smaller diameter compared to the tube diameter. In case the piston moved out the workingarea water could flow pass the piston and reduce the end-stop loads. The construction parts are shown inthe photo below and the assembled section below. The piston is attached to a central guide-rod. This designturned out to take up quite a lot of length in the tube – and a different was developed for the half scaleprototype.The piston (black) in its working area just beneath the by pass area.6
Page 1 and 2: AquaBuOY scale 1:10Test in Nissum B
Page 3 and 4: Introduction:This R&D project invol
Page 5: Scope and ObjectivesooooTo build a
Page 9 and 10: Methodology used installing of the
Page 11 and 12: Results and conclusionThe 1:10 scal
Page 13 and 14: 1:50 Scale Experiment HMRC CorkTo v
Page 15: References:[1] Energi från havets

AquaBuOY scale 1:10 - Energinet.dk

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