Significant Wave Height

Discuss wave-energy device design and modeling

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Arnold.Ramsland
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Joined: Fri Oct 23, 2015 9:27 am
Organization: Ramsland Technology, LLC
Location: North Carolina

Significant Wave Height

Postby Arnold.Ramsland » Thu Mar 05, 2020 9:53 am

Good Morning,

I am looking for a value of the significant wave height that would be typical for floating wind turbines. In the Certification Test file, NRELOffshrBsline5MW_OC4DeepCwindSemi_HydroDyn, the significant wave height is entered as 1.2646. Since this value is used in a Certification Test and there are 4 decimal places, I was wondering if there is an underlying basis for this number.

Thanks,
Arnold Ramsland

Jason.Jonkman
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Location: Boulder, CO
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Re: Significant Wave Height

Postby Jason.Jonkman » Thu Mar 05, 2020 9:59 am

Dear Arnold,

Well NRELOffshrBsline5MW_OC4DeepCwindSemi_HydroDyn.dat came from a specific load case used with the IEA Wind Task 30 OC4 project. This is more of an example rather than a recommendation.

In general, the significant wave height is site specific and conditioned on mean wind speed (typically the higher the mean wind speed, the higher the wave height). Design standards dictate what significant wave height to use for each load case (e.g., the expected value conditioned on mean wind speed, a range of values based on the joint-probability distribution, the 1-year extreme value, or the 50-year extreme value).

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

Arnold.Ramsland
Posts: 15
Joined: Fri Oct 23, 2015 9:27 am
Organization: Ramsland Technology, LLC
Location: North Carolina

Re: Significant Wave Height

Postby Arnold.Ramsland » Thu Mar 05, 2020 2:22 pm

Thank you.


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