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Study on Renewable Energy Resources, Oman - authority for ...

Study on Renewable Energy Resources, Oman - authority for ...

Renewable Energy Resources in Oman Fig. 5.15 System based on sluicing water Fig. 5.16 System utilising fluctuating air column Test results regarding the reliability of such systems in operation under real ocean environmental conditions are still collected. According to achieved experiences the main challenge is to design the wave energy units to withstand the environmental impact in the sea water. Commercially available systems with documented successful long term track records are not yet available on the market. Thus this technology is still considered as being at the development stage even recent performance test results are promising. Page 86 of 134 .

Renewable Energy Resources in Oman Applications The rotational energy generated by a wave energy absorption unit is used for electricity generation. The generator is installed as an integrated part of the wave energy absorption unit. The generated electricity is transmitted to the shore via a sea cable. The power is fed to the main grid on land. Electricity generation The test results of prototype systems indicate that the efficiency of wave energy absorption systems is approximately 10 %, Ref/10/. The efficiency of the conversion to electricity is in the order of 80 %. Thus the total net overall efficiency is in the order of 8 % The wave energy flux in the Arabian Sea is 17 kW/m. At this energy flux the net annual energy production by a wave energy system in the Arabien Sea is 15 MW/m/year. The production by a system installed closer to the Omani coast will generate less energy. Economic key figures According to the example in Ref /19/ the installation cost per kW installed capacity is approximately 2,800 USD/kW. Advantages/disadvantages Advantages • no land requirement for installation of the plant • no visual impact in the landscape Disadvantages • difficult environment to perform maintenance Page 87 of 134 .

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