Publications

Results 1–25 of 65
Skip to search filters

The Marine and Hydrokinetic ToolKit (MHKiT) for Data Quality Control and Analysis [Slides]

Olson, Sterling S.; Fao, Rebecca F.; Coe, Ryan G.; Ruehl, Kelley M.; Driscoll, Frederick D.; Gunawan, Budi G.; Lansing, Carina L.; Ivanov , Hristo I.

The ability to collect, ingest, condition, reduce, quality control, process, visualize, and store data in a standardized way is critical at all stages of Marine Energy (ME) research and technology/project development. MHKiT is an open-source, standardized suite of ME data processing functions that provides the ability to ingest, condition, reduce, quality control, process, visualize and store ME data. MHKiT is developed in both Python and Matlab.

More Details
TYPE Conference Presenation YEAR 2021
OSTIDOI

OC6 Phase 1: Investigating the under-prediction of low-frequency hydrodynamic loads and responses of a floating wind turbine

Robertson, Amy R.; Gueydon, Sebastien G.; Bachynski, Erin B.; Wang, Lu W.; Jonkman, Jason J.; Alarcon, Daniel A.; Amet, Ervin A.; Beardsell, Alec B.; Bonnet, Paul B.; Boudet, Bastien B.; Brun, Cedric B.; Feron, Marie F.; Chen, Zheng C.; Forbush, Dominic D.; Galinos, Christos G.; Galvan, Joseph G.; Gilbert, Philippe G.; Gomez, Juan G.; Haudin, Florence H.; Hu, Zhiqiang H.; Le Dreff, Jean-Baptiste L.; Leimeister, Mareike L.; Lemmer, Frank L.; Li, Haoran L.; Mckinnon, Gill M.; Mendikoa, Inigo M.; Moghtadaei, Abdolmajid M.; Netzband, Stefan N.; Oh, Sho O.; Pegalajar-Jurado, Antonio P.; Nguyen, Minh Q.; Ruehl, Kelley M.; Schunemann, Paul S.; Shi, Wei S.; Shin, Hyunkyoung S.; Si, Yulin S.; Surmout, Florian S.; Trubat, Pau T.; Qwist, Jacob Q.; Wohlfahrt-Laymann, Svenja W.

Abstract not provided.

More Details
TYPE Conference Poster YEAR 2021
OSTI

Development and validation of passive yaw in the open-source wec-sim code

Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE

Forbush, Dominic D.; Ruehl, Kelley M.; Ogden, David; Van Rij, Jennifer; Yu, Yi H.; Tom, Nathan

A passive yaw implementation is developed, validated, and explored for the WEC-Sim, an open-source wave energy converter modeling tool that works within MATLAB/Simulink. The Reference Model 5 (RM5) is selected for this investigation, and a WEC-Sim model of the device is modified to allow yaw motion. A boundary element method (BEM) code was used to calculate the excitation force coefficients for a range of wave headings. An algorithm was implemented in WEC-Sim to determine the equivalent wave heading from a body's instantaneous yaw angle and interpolate the appropriate excitation coefficients to ensure the correct time-domain excitation force. This approach is able to determine excitation force for a body undergoing large yaw displacement. For the mathematically simple case of regular wave excitation, the dynamic equation was integrated numerically and found to closely approximate the results from this implementation in WEC-Sim. A case study is presented for the same device in irregular waves. In this case, computation time is increased by 32x when this interpolation is performed at every time step. To reduce this expense, a threshold yaw displacement can be set to reduce the number of interpolations performed. A threshold of 0.01o was found to increase computation time by only 22x without significantly affecting time domain results. Similar amplitude spectra for yaw force and displacements are observed for all threshold values less than 1o, for which computation time is only increased by 2.2x.

More Details
TYPE Conference Poster YEAR 2020
ScopusOSTI

Portal and repository for information on marine renewable energy primre

Proceedings of the Annual Offshore Technology Conference

Weers, Jon; Driscoll, Frederick; Copping, Andrea; Ruehl, Kelley M.; Lilje, Anne

The Marine Renewable Energy (MRE) industry is in the early stages of development corresponding to low technology readiness levels (TRLs) where the ability of the MRE community (developers, researchers, academics, stakeholders, investors, and regulators) to work together to share knowledge, experience, and lessons learned is critical to the advancement of the entire MRE industry. Through collaboration on solving common problems, the MRE community has the potential to reduce cost and accelerate technology development. Currently, the US Department of Energy (US DOE) Water Power Technologies Office (WPTO) is addressing the challenge of storing, curating, and accessing MRE information by sponsoring development of MRE databases and information portals such as Tethys (https://tethys.pnnl.gov), OpenEI (https://openei.org), the MHK Data Repository (MHKDR, https://mhkdr.openei.org/), and a searchable MRE code catalog and open source code repository (MHKiT, currently under development), to name a few. These sites host scientific papers, news articles, reports, databases, open source codes, and stakeholder engagement information, but they are only a step towards facilitating global discovery and use. In short, there is an abundance of information available online, however it is located on many disparate sites and repositories that make the discovery of those data and information difficult. A DOE national laboratory team from the National Renewable Energy Laboratory (NREL), Pacific Northwest National Laboratory (PNNL), and Sandia National Laboratories (Sandia) is addressing the issues of data discoverability, shared knowledge, and interconnection of existing MRE databases and information portals. To meet the needs of the MRE community, as identified through multiple community outreach and engagement events, and described in this paper, the multi-lab team has developed an implementation plan for PRIMRE, the Portal and Repository for Information on Marine Renewable Energy. PRIMRE will provide broad access to information on engineering and technologies, resource characterization, device performance, and environmental effects of MRE projects. PRIMRE will facilitate the commercial development of the MRE industry by increasing the accessibility and discoverability of this information, integrating the databases and information portals described in this paper, and developing standards and guidelines. Providing consistent, easy access to information can help reduce duplication of effort and enable the MRE community to learn from past failures and build upon the successes of others to innovate and advance the commercialization of MRE technologies.

More Details
TYPE Conference Poster YEAR 2019
ScopusOSTI
Results 1–25 of 65
Results 1–25 of 65