Further development of Enercon’s de-icing system Christoffer Jonsson, Enercon
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Further development of Enercon’s de-icing system Christoffer Jonsson, Enercon

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Further development of Enercon’s de-icing system Christoffer Jonsson, Enercon Further development of Enercon’s de-icing system Christoffer Jonsson, Enercon Presentation Transcript

  • Further development of ENERCON‘s de-icing system Winter Wind, Skellefteå, 2012-02-07 Christoffer Jonsson Site Assessment (+46) 766 31 09 83 christoffer.jonsson@enercon.deFilename: © Copyright ENERCON GmbH. All rights reserved.
  • Griessee: 1x E-70, 2465 m.a.s.l. – Europe‘s highest turbine Photo: Swisswinds/ SIG 2Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Risks with icing on wind turbines• Unbalance of rotor blades lead to oscillations causing higher loads and probably shut down.• Ice pieces can fall down in a reasonable radius around the WEC.• Degradation of aerodynamic efficiency resulting in decreased yield.• Total stop of yield production due to ice detection.• Operating turbines in cold climate is not an easy task!Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Simplicity• The ENERCON de-icing system is based on a simple yet powerful idea (hot air inside the blades).• All parts can be changed within hours from failure by a technician.• The technic is well proven for years. Third party validation available from Deutsche WindGuard.• All new models will have this feature as an option.• It works great! 4Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Safety• ENERCON’s de-icing system is not affected by lightning strikes.• No crane is needed to repair or perform maintenance work on the system.• Air flow is limited to a specific area of the blade but will heat the whole volume it travels in.• No enhanced risk for electrical malfunction in or outside of the blade.• The amount of possible problems is very low! 5Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Low Costs• ENERCON’s de-icing system can be repaid in just a couple of months (depending on the site).• Spare parts are cheap and can be installed, changed, up-dated and repaired with very small effort.• Costs for maintaining the de-icing system are very low.• It’s a cheap way of increasing the availability! 6Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Efficient• ENERCON’s first ice detection and de-icing system was installed in 2004.• During 2009 – 2010 ENERCON added de-icing during operation of the turbine. This was a huge improvement.• According to the validation performed by Deutsche WindGuard our customers can estimate to minimize the icing losses and gain 10 – 15 % in annual energy production due to the efficient de-icing system during operations.• On severe icing sites the gain from minimized icing losses can even add up to 25% of additional energy yield. 7Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Test of rotor blade de-icing system performanceThe efficiency of the rotor blade de-icing system has been tested for 5 months in winter 2009/2010 in locations ata) Dragaliden in Sweden andb) Krystofovy-Hamry in Czech Republic.On both locations 2 WECs E-82 2 MW have been compared. Both WECs are located next to each other.On one WEC the rotor blade heating was activated while it was deactivated on the other WEC.Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Energy yield surplus due to Rotor blade de-icing Dragaliden energy meter readings Difference in yield per month between heated and unheated WEC E-82 2MW at location in Dragaliden (SE) WEC 02 heating on WEC 01 heating off Yield difference 800.000 676.087 700.000 Total yield surplus: 579.905 569.974 600.000 870.000 kWh 490.729 477.533 500.000energy yield [kWh] 397.636 353.515 324.655 322.572 400.000 279.210 279.061 300.000 211.519 153.767 200.000 72.981 100.000 9.931 0 Nov 09 Dez 09 Jan 10 Feb 10 Mrz 10 Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Energy yield surplus due to Rotor blade de-icing in Krystofovy-Hamry (CZ), energy meter readings Difference in yield per month between heated and unheated WEC E-82 2MW at location in Czech Republic WEC 10 heating on WEC 11 heating off Yield difference 700.000 624.271 Total yield surplus: 600.000 500.839 650.000 kWh 485.738 430.993 500.000 416.693energy yield [kWh] 335.896 400.000 284.686 280.959 265.914 249.403 300.000 138.533 132.007 200.000 86.493 69.846 100.000 15.045 0 Nov 09 Dez 09 Jan 10 Feb 10 Mrz 10 Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Results of rotor blade de-icing test period in winter 2009/2010 Krystofovy- DragalidenLocation unit Hamry (CZ) (SE)Amount of test month in winter month 5 5Energy meter difference between WECwith and without blade de-icing kWh 870.000 650.000Average monthly energy surplus in wintermonth with icing kWh 174.000 130.000Percentage of energy surplus in relation toWEC without de-icing system % 48 54The energy yield surplus due to the rotor blade de-icing system strongly depends onmeteorological conditions like icing and wind speed on site. Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Future development of ENERCON’s de-icing systems• ENERCON has developed ice detection solutions and de-icing systems for years.• We see a growing interest for markets in cold climate since the world wide economic difficulties in 2008.• ENERCON is well prepared and we have validated proven technology to support our customers needs.• The next step will be to include this de-icing system to our newer and bigger turbines… 12Filename: © Copyright ENERCON GmbH. All rights reserved.
  • E-101 – Fan and radiator systemFilename: © Copyright ENERCON GmbH. All rights reserved.
  • De-icing system for the ENERCON E-126 7,5 MW•The new de-icing system for the E126 is under development.•The de-icing system is divided in two different systems. A new inner blade concept and theapproved concept for the outer blade. Pipe Air heating element Leading edge with hot air Electrical heating pads VentilatorFilename: © Copyright ENERCON GmbH. All rights reserved.
  • De-icing system E-126, thermography picture • Infrared photo with a first result of heating tests of the inner blade while the rotor is rotating. • Heating pads inside the steel blade heating up the outer surface and hot air heating up the outer blade. • Please notice that the mass of the inner blade ~ 60t !Filename: © Copyright ENERCON GmbH. All rights reserved.
  • E-126, Inner blade - pipeFilename: © Copyright ENERCON GmbH. All rights reserved.
  • E-126, Inner blade - full systemFilename: © Copyright ENERCON GmbH. All rights reserved.
  • De-icing system for the ENERCON E-126 7,5 MW Pipe Air heating element Leading edge with hot air Electrical heating pads VentilatorFilename: © Copyright ENERCON GmbH. All rights reserved.
  • Main advantages with ENERCON rotor blade heating is … • All systems are safe against lightening • There are only two additional approved components • There is no need to use specially designed blades • Inexpensive • Easy to handle for maintenance (all components are exchangeable) • High efficiency to reduce energy yield loss due to icing • System can work while rotor is rotating => leads to minimize the power consumption from the grid • It is simple, safe and works just great!Filename: © Copyright ENERCON GmbH. All rights reserved.
  • Thank you for your attention! Simple Safe Low cost Efficient Winter Wind, Skellefteå, 2012-02-07 Christoffer Jonsson Site Assessment (+46) 766 31 09 83 christoffer.jonsson@enercon.deFilename: © Copyright ENERCON GmbH. All rights reserved.