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PARTNERSHIP WORKING GROUP SEMINARSan Nicolas Island (SNI) is a US Navy owned and operated island....
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FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR
San Nicolas Island UESC Energy Conservation Projects
May 2, 2019 | San Diego, CA
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» Roles» Responsibilities
Introductions Island Overview
SoCalGasGordon Maynard, Team Lead
Pride Metcalf, Project Manager
San Nicolas Island (SNI) is a US Navy owned and operated island. Located about 65 miles southwest of Point Mugu, it is the cornerstone in the Sea Range capabilities.
Due to its instrumentation, isolation and shoreline characteristics, SNI is ideal for conducting test and training exercises and for providing littoral warfare training, including tri-service and theater warfare exercises.
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Goal: The Navy highly values energy resiliency and reliability aboard SNI.
Navy Strategic ObjectiveNavy Title, Name TBB
The SNI Power Strategy had to address:Prime Drivers:
» Resilient, renewable power» Reliable infrastructure & power
Associative Benefits:» Energy conservation
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Resiliency» Wind Turbine
Generators (WTG)
Reliability» Hybrid System
Supervisory Controller (SCADA)
» Synchronous Condenser
» High Speed Load Bank
» Diesel Generator
Energy Conservation» Generator Coolant
Heater» Generators’ Radiator
VFDs» Pool Thermal Solar» Lighting retrofits
Prime Drivers Associative Benefits
Energy Conservation MeasuresNavy Title, Name TBB
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Discussion Topics» Setting
» Logistical Considerations
» Design Considerations
» Pre-construction Load Profile
» Energy Strategy
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Presentation OverviewNavy Title, Name TBB
San Nicolas Island
Point Mugu
San Clemente Island
Remote Location
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Appreciating San Nicolas Island’s Setting
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Setting
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Wind Resource
Setting - Resource
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Setting – Preservation
Fauna8
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Setting – Preservation (cont.)
Archeological9
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Setting – Erosion and Slope Stability Realities
Environmental10
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Setting – Location Considerations
Soft landing zone
Coastal Observation Assets
Location11
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Logistical Considerations
Logistics12
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Design Considerations
Location, location, location» Determining the size and final
placement of the wind turbine generators
» Given the previously mentioned constraints, and…
» Made in America
Navy’s 3 PillarsDrivers:» Reliability» ResiliencyAssociative Benefits:» Energy Reduction & Efficiency
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Generator
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Design Considerations
Generator
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Generator
2Generator
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Generator
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Drivers14
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SNI Typical Pre-construction Load Profile
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Notes:1. Load Profile – Typical daily use.2. Base Load – lowest safe generator turndown.
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Resulting Energy Strategy
Resiliency & Reliability» Seven 100-kw wind turbine generators
with custom 8-ft diameter by 16-ft deep pre-cast foundations
» Hybrid System SCADA primary and secondary controllers
» Synchronous Condenser & 160-kW Load Bank
» 2.2-miles underground 12-kV and fiber optic communications infrastructure
» Local and remote (powerhouse) control of wind turbine generators
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Energy Conservation Measures
» 750-kW, 1,200-RPM reciprocating engine equipped with 1,000-kW alternator
» Thermal Solar Pool Heating System
» Hot water to Oil heat recovery system on all power plant generators, eliminating electric block heaters
» Variable Frequency Drives on all Generator radiators fans
» High-efficiency lighting retrofits
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Resulting Energy Strategy
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Nacelles – manufactured in Vermont» Direct drive generator» 100-kW capacity rated» Cut-in Speed: 7.8-mph» Cut out Speed: 56-mphBlades – manufactured in San Diego, CA» Fixed pitch blade length: 30’» Rotor diameter: 69’Towers – manufactured in Wisconsin» Tubular monopile in 3 sections» Tower height: 117’» Hub height: 121’» Maximum height: 156’ (to tip of vertical blade)» Internal ladder access to nacelle with emergency
decentFoundations – manufactured in California» Precast concrete 16’ deep by 8’ Ø
Wind Turbine Generators
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0.0
20.0
40.0
60.0
80.0
100.0
120.0
0.0 10.0 20.0 30.0 40.0 50.0 60.0
kW / Wind Speed
Average Wind Energy Production
mph kW
2.2 0.04.5 0.06.7 0.08.9 3.7
11.2 10.513.4 19.015.7 29.417.9 41.020.1 54.322.4 66.824.6 77.726.8 86.429.1 92.831.3 97.333.6 100.035.8 100.838.0 100.640.3 99.842.5 99.444.7 98.647.0 97.849.2 97.351.4 97.353.7 98.055.9 99.7
Power Curve: 21-Meter Rotor
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Strategic Drivers – Results
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Resiliency Pillar» Seven 100-kW Wind Turbines generating
electricity above minimum generator output» New wind turbine switchgear that can
accommodate a battery system» Five 1,000-kW generators (one new) with
one in constant operation and four in “standby” mode, kept warm by the active generator’s recirculating hot water via individual hot water to oil heat exchangers
» Fewer annual refueling barge runs -extended from monthly to 3 – 4 times per year (depending on operations)
» Distributed, redundant, renewable power
Reliability Pillar» Power factor improved from 0.5 to 1.0
» High Speed Scada primary and secondary smart load controllers (HSSLC) that intelligently schedules and matches electricity load to generator(s), wind turbines, frequency condenser and load bank
» Power outage and power quality issues are rare
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Energy Conservation Benefits
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Summary» These installed measures have
proven to be successful
» But we are not finished – improved operational adjustments and tuning should yield incremental savings.
» Navy considering additional Energy Measures that improves this mission-critical, isolated micro-grid and further enhances its power resiliency and reliability
Energy Efficiency Pillar» Typical daily electricity profile reduced
from 550 to 975-kW to 200 to 500-kW demand
» New generator minimum output –160-kW as opposed to previous 500-kW
» Project cost - ~$21M
» Estimated simple payback: <20-yrs
» Estimated SIR >1.2
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San Nicolas Island UESC Energy Conservation Projects
CLOSING COMMENTS
Andrew BaughmanNAVFAC SW Energy Program Director