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- Marine Energy
Optimizing power generation of a bottom-raised oscillaing surge wave energy converter using a theoretical model
Lead Companies
NREL
Lead Researcher (s)
- Nathan Tom
Preliminary sizing of an oscillating surge wave energy converter (OSWEC) is an iterative process that relies on knowledge of the relevant hydrodynamic coefficients for a given geometry. Often, the complex definition of the device geometry requires coefficients to be obtained through experiments or numerical boundary element solvers such as WAMIT. These techniques demand significant user and computational effort, therefore inhibiting the fine-scale parametrization of object dimensions. In this study, a theoretical model, originally presented in Michele et al. (2016), is developed and demonstrated to efficiently optimize the power production for an OSWEC device (subjected to certain environmental conditions) with variations in device widths, heights, and distances from the seabed.
Technology Application
Marine Energy
Research Category
Research Sub-Category
Status
complete
Completion Date
2021
- Marine Energy
ORPC FOA Support 1663
Lead Companies
Sandia National Laboratories
Lead Researcher (s)
- Budi Gunawan
Marine and hydrokinetic (MHK) energy contributes to national energy objectives by providing clean energy to reduce oil dependency and lower carbon emission. The long-term water program goal is to significantly reduce the levelized cost of energy (LCOE) for marine and hydrokinetic devices and enable significant deployment of grid-scale cost-competitive MHK by 2030. In 2017, the Department of Energy (DOE) Water Power Technologies Office (WPTO) issued a Funding Opportunity Announcement (FOA), entitled Marine and Hydrokinetic Technology Development and Advancement, to support MHK research and development for current energy converters (CECs). This project will use model-scale tank testing and fluid-structure-interaction (FSI) simulations to investigate the behavior of hydrofoils with large deflections and the effect of the radial and rotational deflections on cross-flow turbine performance with the ultimate goal of determining the maximum allowable deflections consonant with efficiency and a robust, durable structure. Care will be given to developing a robust, validated modeling and simulation approach, which will be used in the design of ORPC’s full-scale turbines, and will be applicable to the design of other MHK devices.
Technology Application
Marine Energy
Research Category
Technology
Research Sub-Category
Tidal
Status
ongoing
Completion Date
TBD
- Marine Energy
Oscilla FOA 1663
Lead Companies
Sandia National Laboratories
Lead Researcher (s)
- Ryan Coe
The overarching goal of this project is to successfully improve, build, test and validate an improved, higher power density LHD at 1:10 scale with power dissipation and active control implemented.
Technology Application
Marine Energy
Research Category
Technology
Research Sub-Category
Wave
Status
ongoing
Completion Date
TBD
- Conventional Hydro
Outage Planning Maturity Matrix
Lead Companies
CEATI International
Lead Researcher (s)
- #0424
The matrix includes all activities for Outage Planning including the scheduling and impact evaluation of outages in the forecast mode, the evaluation of actual outage impacts computed after the fact, and issues pertaining to efficient communications within the organization.
Technology Application
Conventional Hydro
Research Category
Interconnect Integration and Markets
Research Sub-Category
Hydraulic Optimization
Status
complete
Completion Date
2020
- Conventional Hydro
Owner Dam Safety Program Audit Using the Dam Safety Maturity Matrix
Lead Companies
CEATI International
Lead Researcher (s)
- #0249
To provide an audit of an owner's dam safety program using the DSIG Dam Safety Maturity Matrix and Peer Reviewers from multiple DSIG member utilities.
Technology Application
Conventional Hydro
Research Category
Dam or Weir
Research Sub-Category
Dam Safety
Status
ongoing
Completion Date
Expected 2020
- Marine Energy
PacWave Grid Integration Study Transient and Dynamic Conditions Final Report
Lead Companies
NREL
Lead Researcher (s)
- Vaha Gevorgian
This report describes the results of Power System Computer-Aided Design (PSCAD) simulations that were performed in 2020 and 2021 to assess the impacts of PacWave South generation on the Central Lincoln People’s Utility District (CLPUD)’s 12.47- kV distribution and 69- kV subtransmission systems.
Technology Application
Marine Energy
Research Category
Research Sub-Category
Status
complete
Completion Date
2021
- Conventional Hydro
Penstock Inspection and Assessment Reference Manual
Lead Companies
CEATI International
Lead Researcher (s)
- #0388
In developing this guide, the basic approach was to integrate two existing ASCE publications, Guidelines for Evaluating Aging Penstocks (1995) and Guidelines for Inspection and Monitoring of In-Service Penstocks (2000), into a single reference manual, enhanced where appropriate with current practices and augmented by contemporary risk-informed decision making and existing best management practices for penstock asset management, monitoring and surveillance.
Technology Application
Conventional Hydro
Research Category
Water Conveyance
Research Sub-Category
Penstock
Status
complete
Completion Date
2020
- Marine Energy
Performance of reverse osmosis membrane with large feed pressure fluctuations from simulated wave-driven desalination system
Lead Companies
NREL
Lead Researcher (s)
- Kurban Sitterley
- Scott Jenne
- Yi-Hsiang Yu
Wave-driven desalination systems are proposed water treatment systems that involve reverse osmosis of seawater powered directly by wave motion. Such a configuration would result in drastic feed pressure fluctuations. For a technology conventionally operated with a constant feed condition, the effect of these variable pressures on membrane integrity and performance is unknown. Experiments were conducted with spiral wound membranes coupled to a system capable of producing feed pressure fluctuations of more than 400 psi. Feed composition included 5, 20, and 35 g/L NaCl, and a synthetic seawater at normal and 1.5× concentration. The variable feed conditions included sine-like pressure waves swings of 200–500 and 500–900 psi with frequencies of 1.25, 7.5, and 12 waves/min, and a model-generated random waveform. Between each wave experiment we performed membrane integrity tests at 650 psi and 25 g/L NaCl feed, which showed a 7.4% drop in the membrane's water permeability coefficient, an 18.4% flux decline, and more than 99% salt rejection over 1770 h of cumulative experimental time. Analysis of permeate samples showed high salt rejection. In general, variable feed pressure had no significant deleterious effect on membrane integrity or performance.
Technology Application
Marine Energy
Research Category
Research Sub-Category
Status
complete
Completion Date
2020
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Have questions about WaRP?
Contact Marla Barnes at: marla@hydro.org