This downselect report follows the progression from initial concept pool to final concepts moving forward to tank testing for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX." Included is a brief discussion of anticipated impacts of the 3 finalists.

This project successfully developed methods for numerical modeling of sediment transport phenomena around rigid objects resting on or near the ocean floor. These techniques were validated with physical testing using actual sediment in a large wave tank. These methods can be applied to any nearshore structure, including wave energy devices, surge devices, and hinged flap systems. These techniques can be used to economically iterate on device geometries, lowering the cost to refine designs and reducing time to market. The key takeaway for this project was that the most cost-effective method to reduce sediment transport impact is to avoid it altogether. By elevating device structures lightly off the seabed, sediment particles will flow under and around, ebbing and flowing naturally. This allows sediment scour and accretion to follow natural equalization processes without hydrodynamic acceleration or deceleration effects of artificial structures. This submission includes the final technical report for this DOE project. The objective of this project was to develop a set of analysis tools (hydrodynamics and structural models providing inputs into a sediment model), and use those tools to identify and refine the optimal device geometry for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX."

Laboratory Testing for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX." Content Model of 1:5 testing of thirteen different APEX I and APEX II configurations in the Hinsdale Long Wave Flume with a 0.5m deep sediment bed and under 4 different wave conditions at Hinsdale Wave Research Laboratory.

Detailed laboratory test plan for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX." Includes test points, materials and methods, and sensors/telemetry to be used. Includes schematics of test apparatus and sensor type and locations.

Detailed laboratory test plan for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX." Includes test points, materials and methods, and sensors/telemetry to be used. Includes schematics of test apparatus and sensor type and locations.

This survival test report for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX," summarizes the key tank test data, numerical model results, input test conditions (both numerical and tank testing), and crosses these items with three designs of the APEX wave energy converter. The baseline design of APEX is included, in addition to a minimalistic caisson design (aka 'the skeleton'), and variations of the APEX design where elevation off of the seabed is achieved. In general, sediment transport mitigation is a trade-off with other design factors, for example: while a minimalistic caisson helps reduce local scour for many wave conditions, it comes at a cost for bag connection failure/weakening.

This is a preliminary test plan for testing of the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX," at Hinsdale Wave Research Laboratory at Oregon State University. Additional logistical details and instrumentation specifics will be added as engineering and planning wraps up.

Summary of numerical survivability modeling method for the baseline geometry of the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX."

Configurations as tested and modeled in final phase of project for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX."

This is the preliminary concepts that formed the basis of the first round of numerical modeling and technical discussions for the Delos-Reyes Morrow Pressure Device (DMP), commercialized by M3 Wave LLC as "APEX." IGES wireframes will be uploaded also. Additional hybrid concepts are also being developed currently.