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Silent

Invisible

Predictable

Sustainable

Harness energy from coastal marine currents

CREST ENERGY KAIPARA

WWW.CREST-ENERGY.COM

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OBJECTIVES

Generate electricity close to consumer demand

Supply Auckland and Northland with power from marine turbines in the Kaipara Harbour

Produce and assemble turbine components for local and export markets

Evaluate other sites in New Zealand and Asia-Pacific rim

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Marine Currents = High Intensity Energy

Water is non-compressibleand 832 times denser than air

SCALED at 1 MW

Wind turbineWind turbine

1 x 55m diameter

SolarSolar arrayarray

70m x 70m

Marine turbinesMarine turbines22 m diameter

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Tidal volume: Eight billion cubic meters dailyCurrents: 2.1 to 2.4 meters per second

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LUNAR ENERGY/ROTECHMARINE TURBINE

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9Pouto Peninsula

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Why DC cable transmission?

• Cook Straight electrical transmission uses DC cables (1961)

• Two small DC cables versus three large AC cables (30 km)

• Cables are armour plated and buried over one metre deep into harbour floor

• Power ranges from 0 to 200 MW to 0 in 6.5 hours

• Charging DC cables does not present a limitation, by comparison to AC

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DC-AC converter and substation

• Sound-proof building50 x 30 x 10 metres

• Underground cables link indoor

converter to outdoor substation

• Substation fenced25 x 30 metres

• Transmission via overhead lines to Wellsford and Helensville (and/or other options)

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MAUI DOLPHINMAUI DOLPHINCephalorhynchus hectoriCephalorhynchus hectori mauimaui

Critically endangered (46 to 280 individuals)

Agile, communicative, acute vision and echolocation

Confirmed sighting in the Kaipara Harbour

Produce 200 MW

Install turbines

Secure capital

Process consents

Developed concept

Consultation started

Crest Energy founded

Consent applications lodged

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ADVANTAGES OF MARINE CURRENT ADVANTAGES OF MARINE CURRENT POWER GENERATIONPOWER GENERATION

Large capacity for producing power

Predictable energy resource

Sustainable and renewable energy

Minimal noise

No visual impact

Low greenhouse gas emissions

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Ma te kotahitanga e whai kaha ai tãtau