Offshore wind
Download
1 / 18

Offshore Wind - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

Offshore Wind. Geoff Sharples [email protected] Frequently Unanswered Questions. Why don’t “they” build more offshore wind? Why not make the blades bigger? How big will turbines get?. Offshore Resource is Good. The Market Drivers Converge. New offshore exceeds new onshore.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Offshore Wind' - jermaine-huffman


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Offshore wind

Offshore Wind

Geoff Sharples

[email protected]


Frequently unanswered questions
Frequently Unanswered Questions

  • Why don’t “they” build more offshore wind?

  • Why not make the blades bigger?

  • How big will turbines get?



The market drivers converge
The Market Drivers Converge

New offshore exceeds new

onshore



Wind ventures further offshore
Wind ventures further offshore huddled at 20x20

To a shore based observer a 90m nacelle is below the horizon at 35 km

To a shore based observer a wind farm appears as white stripe at 20km

Interactive map at http://www.4coffshore.com/offshorewind/

Source: EWEA Oceans of Opportunity 2009

Confidential


Power prices higher in coastal states
Power Prices Higher in Coastal States huddled at 20x20

Cape Wind PPA at 18 c/kWh


The cycle of non innovation
The cycle of non-innovation huddled at 20x20

Capital intensity curtails innovation

but

Offshore turbines today :

Modified onshore turbines

Confined to shallow water

Incumbents: understand the technical issues Have a vested interest in existing supply chains and facilities.

Human customers demand cheap reliable power

Project Financiers are risk averse

Offshore wind: Close to load

Far from view

Large Resource

Because

Developer tech risk averse

Because

Incumbents fund evolutionary design

Utilities are risk averse

Because

Entrepreneurs can’t fund revolutionary prototypes


Cost of energy
Cost of energy huddled at 20x20

COE = (DR+IWF) x ICC + LRC + O&M

AEPnet

Where: COE = LevelizedCost of Energy ($/kWh) (constant dollars)

DR = Discount Rate (1/yr) = RISK Large Impact

IWF = Insurance, Warranty and Fees (1/yr)

ICC = Initial Installed Capital Cost ($) = TURCC+ BOSCC

TURCC = Turbine Capital Cost ($) Some Impact

BOSCC= Balance of System Capital Cost ($) Small? Impact

LRC = LevelizedReplacement/Overhaul Cost ($/yr) Med Impact

O&M = LevelizedO&M Cost ($/yr) Med Impact

AEPnet =Net Annual Energy Production (kWh/yr) Large Impact


Physical constraints
Physical Constraints huddled at 20x20

Swept Area R^2

Mechanical conversion efficiency

Rotor Power Coefficient

conversion wind to mechanical

(subject to Betz limit)

air density

U = wind speed


Design objectives
Design Objectives huddled at 20x20

  • Reduce Risk

  • Increase energy capture

  • Get to better resource

  • Reduce operations cost

  • Increase turbine capacity


Design areas
Design Areas huddled at 20x20

  • Blades

  • Towers

  • Generators


Rethink old ideas
Rethink old ideas huddled at 20x20




Frequently unanswered questions1
Frequently Unanswered Questions huddled at 20x20

  • Why don’t “they” build more offshore wind?

  • Why not make the blades bigger?

  • How big will turbines get?


FIN huddled at 20x20

Thank You


ad