Presentation on theme: "Feasibility Study of Harnessing Onshore Wave Energy at Waipapa"— Presentation transcript:
1 Feasibility Study of Harnessing Onshore Wave Energy at Waipapa School of Engineering / Unitec Institute of TechnologyFeasibility Study of Harnessing Onshore Wave Energy at WaipapaByMuhunthan Ponniah /Babar Mahmood
2 INTRODUCTIONThe two key issues that are beginning to drive the current energy sector are Climate change and Fuel SecurityThe need for Renewable energy is becoming more essential in today’s Energy world marketWave Energy is emerging as a key technology with the potential to make a large contribution with minimal Environmental Impact
3 RATIONALEEstimated that if less than 0.1 % of the renewable energy available within the oceans could be converted into electricity it would satisfy the present world demand for energy more than five times overEstimated wave energy around the New Zealand coastline is 30 kW/m which is a good quality resourceAccording to NIWA Waipapa receives the highest onshore wave height in New Zealand
5 MAIN AIMSTo study the feasibility of harnessing onshore wave energy at WaipapaTo estimate the potential power generation by onshore wave energy at Waipapa
6 SPECIFIC OBJECTIVESReview the principles and methods currently used to harness onshore sea wave energyCollect data (wave height, wave period) of New Zealand coastal areas and compare with the Waipapa siteDetermine the amount of power that can be harnessed from an onshore sea wave energy model at WaipapaAnalysis of onshore sea wave energy models
7 Turbine efficiency (%) METHODOLOGYLiterature showed the following principles and methods of harnessing onshore wave energyWave CompanyWavegen CompanyEnergetech companyPrincipleOWCTurbine efficiency (%)65 %40 %Cost per kW(NZ Cents)10 cents15 centsPower to national gridYesNoEnvironmental issuesMinimalNot known yet
8 Function of Wavegen model video image METHODOLOGY …….Function of Wavegen model video imageWave height, wave period at Waipapa and other New Zealand coastlines were collected from NIWAPower generation from an onshore sea wave energy model at Waipapa was calculated using wave power equationP = 0.5H2T kW/m length of wave crestP = power in kW/m width of wave frontH = wave heightT = average wave period in seconds
11 RESULTS AND DISCUSSIONS Power consumptionAverage power consumed in a 3 bedroom house in New Zealand is approximately 10 MWhThe average annual onshore wave power from Waipapa over the 5 year period ( ) was 3,693 MWhHence Waipapa onshore wave plant could supply power for 369 –3 bedroom houses
12 RENEWABLE ENERGY COST COMPARISONS (NZ $) Type of Renewable EnergyCost to produce one kWhWater (small Hydro)5 – 10 c/kWhWind farms on best sites6 – 08 c/kWhSolar (Solar thermal for water heating)13 – 16 c/kWhWave (Onshore wave prototype )8 – 16 c/kWh
13 Summary and Conclusion Estimate power produced at Waipapa was3,693 MWh using the Wave power equationIt can supply power for 369 – 3 bedroom housesOscillating Water Column Principle was chosen based on the literature studyWavegen prototype is the most suitable prototype for the Waipapa site.
14 RECOMMENDATIONSThe costs of possible onshore wave power plants on the New Zealand coast should be more accurately estimated with the help of overseas wave energy companies.A more ambitious project would be to design and build a New Zealand prototype to get an even better idea of New Zealand conditionsThere is a need for further detailed research in the wave energy .