HEXICONDoubling up on economy of scale –Hexicon to install 10 MW floating multi turbine platform

3/31/20172

FLOATING FOUNDATIONS

3/31/20173

SEMISUBMERSIBLE PLATFORM

• Three columns with buoyancy tanks provide stability in operational and extreme conditions

• Turret-based single point mooring system

• Facilities which can be installed on the platform or combined with it:o Solar panelso Transformero Fish farmso Desalination

• Quayside commissioning:o Safer working environmento No heavy lift at seao No barges or heavy lift vesselso Turbine erection in dry docko Most Commissioning in dry dock

3/31/20174

MULTI TURBINE PLATFORM

For certain installed power,compared to standalone turbines:

• Less use of sea area• Cost reduction of mooring system• Cost reduction of towing• Two WTGs installed in one operation• Less inter-array cables• Cheaper maintenance

3/31/20175

MULTI TURBINE PLATFORM IN OPERATION

Weather vaning:

• Driven by thrust force

• Yaws about the turret

Will turbine wake interaction cause loss of total power?

• Peer-reviewed research results indicate some increase in power compared to two isolated turbines (simulation models and wind tunnel tests, e.g. [1,2])

• No need to curtail or shut down any of the turbines due to misalignment.

[1] Local blockage effect for wind turbines, Takafumi Nishino och Scott Draper, Journal of Physics: Conference Series 625, no. 012010, Wake Conference 2015.[2] An investigation of in-field blockage effects in closely spaced lateral wind farm configurations, S. McTavish, S. Rodrigue, D. Feszty, och F. Nitzsche, Wind Energy (2014)

3/31/20176

THE DOUNREAY TRÌ PROJECT

• The Dounreay Trì Project comprises the development, construction and operation of the Hexicon floatingmulti turbine platform.

• The floating platform will be deployed in Scottish Territorial Waters in Summer 2018

• The Project consists of:

o A two turbine floating platform with an installed wind power capacity of 10 MW,off Dounreay, Caithness, Scotland

o A single export cable to shore

o The associated onshore electrical infrastructure.

3/31/20177

GOOD NEWS

3/31/20178

THE HEXICON PLATFORM FOR THE PROJECT

3/31/20179

MODEL TESTING

3/31/201710

FABRICATION PROGRAMME

The fabrication programme at ship yard:

• Final assembly in dry dock (at NEP, NIGG Energy Park)

• Towers erected and WTGs installed in the dry dock

• The complete platform is towed from dry dock to site

• Export cable, anchors and mooring system will be installed at the offshore site before arrival of the platform

• The overall fabrication programme will take approx. 12 months. Fabrication of the platform and installation of the cable, anchors and moorings will be done in parallel.

3/31/201711

THE PROJECT PLAN

March 29