MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...
MS Thesis R. Hager - Hawaii National Marine Renewable Energy ... MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...
These too are subjected to a less powerful wave regime (Drew, 2009). An example of anearshore device is the OSPREY (Clément, 2002).2.1.3 OffshoreOffshore devices are installed in deep water, approximately 40 meters or deeper. The higherenergy waves are offshore, however, these devices are more expensive to deploy andmaintain (Falcão, 2010). Since these devices also experience the higher energy waves, theyalso are most subjected to destructive conditions (Drew, 2009). Examples of offshoredevices include the Archimedes Wave Swing and Pelamis (Clément, 2002).2.2 Mode of MotionMode of motion describes which and how many degrees of freedom the device has. Thereare six potential degrees of freedom; the first three listed are translational and the latter threeare rotational, as seen in Figure 2.1:SurgeSwayHeaveRollPitch2y5z6341x Yaw Figure 2.1 Modes of Motion (Newman, 1977)22
2.3 OrientationOrientation is defined as the direction of the device with respect to the incoming wave.Orientation can be further categorized as:Point AbsorbersAttenuatorsTerminators2.3.1 Point AbsorbersPoint absorbers are devices with dimensions much shorter than the wavelength, and are thusnon-directional (Newman, 1977). Point absorbers can further be classified as floating,heaving devices or submerged, pressure differential devices. Floating, heaving devices canalso be either partially or fully submerged. An example of a point absorber is the Powerbuoy(Drew, 2009).2.3.2 AttenuatorsAttenuators are parallel to the wave propagating direction. Their lengths are typicallycomparable or longer than the wavelengths. Attenuators typically move via the motion ofthe wave. The most notable is Pelamis depicted in Figure 2.2 (Drew, 2009).Figure 2.2 Pelamis (ecogeek.com)23
- Page 1 and 2: Geometric Effects on Maximum Power
- Page 3 and 4: ABSTRACTNumerical simulations are c
- Page 5 and 6: 3.7 Absorbed Wave Power ...........
- Page 7 and 8: LIST OF FIGURESFigurePageFigure 1.1
- Page 9 and 10: NOMENCLATUREA=incident wave amplitu
- Page 11 and 12: 1.2 Advantages of Wave EnergyAdvant
- Page 13 and 14: for various projects. Included in t
- Page 15 and 16: pollution would occur from hydrauli
- Page 17 and 18: Figure 1. 7 Average Annual Wave Pow
- Page 19 and 20: Backer (2009) numerically and exper
- Page 21: CHAPTER 2. WAVE ENERGY CONVERSION D
- Page 25 and 26: Figure 2.4 Oscillating Water Column
- Page 27 and 28: 2.5 Reference PointMeans of reactio
- Page 29 and 30: Linear GeneratorTurbineRotary Gener
- Page 31 and 32: Table 2. 1 WEC ClassificationsDevic
- Page 33 and 34: 33P.T.O.MooringReferencePointOperat
- Page 35 and 36: CHAPTER 3. THEORY AND GOVERNING EQU
- Page 37 and 38: F(x,z,t) z 0DFDtFt u F 0 0 (4
- Page 39 and 40: in ni(13)on S for i=1, 3in( r n)i3
- Page 41 and 42: I iAg e ekz i( kx t)(30)cosh( k(z
- Page 44 and 45: where ijkis the permutation symbol.
- Page 46 and 47: Mw k ieitS( D I) ijkrinjdS(46)3.3.3
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- Page 50 and 51: TE KE PE 20L Asin(kx) 1 2(61)dV d
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- Page 54 and 55: 221 2P gA C(77)max g2 3.8 Maximum
- Page 56 and 57: 4.2 AQWA Modeling ProcedureThe user
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These too are subjected to a less powerful wave regime (Drew, 2009). An example of anearshore device is the OSPREY (Clément, 2002).2.1.3 OffshoreOffshore devices are installed in deep water, approximately 40 meters or deeper. The higherenergy waves are offshore, however, these devices are more expensive to deploy andmaintain (Falcão, 2010). Since these devices also experience the higher energy waves, theyalso are most subjected to destructive conditions (Drew, 2009). Examples of offshoredevices include the Archimedes Wave Swing and Pelamis (Clément, 2002).2.2 Mode of MotionMode of motion describes which and how many degrees of freedom the device has. Thereare six potential degrees of freedom; the first three listed are translational and the latter threeare rotational, as seen in Figure 2.1:SurgeSwayHeaveRollPitch2y5z6341x Yaw Figure 2.1 Modes of Motion (Newman, 1977)22
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