1. 1 | Program Name or Ancillary Texteere.energy.gov Water Power Peer Review Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters Patrick Grandelli, P.E. Makai Ocean Engineering, Inc. Pat.Grandelli@Makai.com, 540-439-8971 27 Sep 2011

2. 2 | Wind and Water Power Programeere.energy.gov Purpose, Objectives, & Integration How do we design an OTEC plant to sustainably and economically process and discharge the massive seawater flows associated with OTEC? Use a numerical model to quantify OTEC discharge component design, OTEC performance, and environmental changes that may result from OTEC flows. This bio-plume modeling supports other OTEC development efforts funded by NavFac, Lockheed, ONR and the State of Hawaii For 100 MW: 420 m 3 /s WW (7 M gpm) 320 m 3 /s CW (5 M gpm)

3. 3 | Wind and Water Power Programeere.energy.gov Technical Approach 500m, 30m wave 1000m, 50m wave 850m, 40m wave 80m, 20m wave 130m, 25m wave 230m, 30m wave Numerical ocean circulation model of Hawaii. (HIROM) Numerical simulation of plankton growth caused by nitrate enrichment. (in EFDC) Validate the circulation model with new (2010) current and density data. (e.g., temperatures at right indicate vertical nutrient oscillation.)

4. 4 | Wind and Water Power Programeere.energy.gov Plan, Schedule, & Budget Schedule Initiation date: 16 Sep 2010, (Final contract during Jan 2011) Planned completion date: 29 Feb 2012 FY 11 Milestones: Dec 2010 - Retrieval of oceanographic mooring with 7 months of CTD and ADCP data April 2011 - Delivered oceanographic data to NOAA Liaison at the University of Hawaii May 2011 - Gave briefing to David Kennedy, Assistant Administrator for National Ocean Service Aug 2011 – Larger domain on Linux running successfully Sep 2011 – Biological module running successfully Sep 2011 –Presented paper at Marine Technology Society Oceans’11 conference Budget: $240 K DoE, $161 K Lockheed & Makai No significant budget variances. Subconsultants labor has been less than budgeted Expenditures as of 15 Sep 2011: $ 220,091 Budget History FY2009FY2010FY2011 DOECost-shareDOECost-shareDOECost-share $ 0 $ 120 K$133 K