MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

1.2 Advantages of Wave EnergyAdvantages of harnessing wave energy versus other forms of renewable energy are:Far propagationSeasonal compatibilityLow atmospheric emissions1.2.1 Wave PropagationWaves are able to propagate long distances with little energy loss (Clément, 2002). Swells can havewavelengths of 100 to 500 meters in deep water, and wind waves can have wavelength ranging a fewmeters to 500m in deep water depending on wind speed (Falnes, 2007).1.2.2 Seasonal CompatibilityThe seasonal variability of wave energy tends to follow the electricity demand in high latitudes,where there is a higher population density (Clément, 2002). The wave power level is highest in thewinter when electricity demand increases due to heating and lighting loads (Cruz, 2008).1.2.3 Low Atmospheric EmissionsIt is difficult to fully recognize the environmental impacts of WEC devices due to a lack of oceantesting for substantial lengths of time. However, WEC devices are expected to have fewenvironmental impacts, in particular, low atmospheric emissions (Clément, 2002). WEC deviceswould produce no atmospheric emissions while generating electricity, however, emissions wouldoccur during installation, maintenance, and decommission (Cruz, 2008). In 1998 Thorpe carried outa lifecycle emissions evaluation of various energy sources, including nearshore WEC devices. Theresults are presented in Figures 1.1 to 1.3, confirming WEC devices would have relatively lowatmospheric emissions.11