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Oils, Fuels, and Greases 

Author:  | Environment, North Carolina, Technology

Table 3.2-12 Preliminary Summary of Oils, Fuels, and Greases for Construction and Operations*

Chemical Type Description Use/Location Approx. Volume Frequency of Transfer Treatment or Disposal
Transformer oil (WTG and ESP) Bio-degradable oil or highly refined mineral oil Main 220/66 or 220/132 kV Transformers, 220 kV shunt reactors, 66 or 132 kV aux. transformers & 66 or 132 kV grounding reactor 6,000 L per WTG
466,400 L on ESP
Not anticipated; only changed if needed To be brought to designated O&M port and disposed according to regulations and guidelines
Lubrication oil (ESP) Lubricant oil Crane
Emergency generator
Crane: To be defined during detailed design
Emergency generator: 55 L
Expected every 5-8 years To be brought to designated O&M port and disposed according to regulations and guidelines
General oil (WTG and ESP) Different kinds of oil WTGs: Hydraulics, gear box, yaw gears, transformers, etc. Might also be used for passive damper located in tower
ESP: Hydraulic oil for crane
8,000 L per WTG
3,000 L to be replaced as part of scheduled maintenance
1,320 L on ESP
Expected every 5-8 years To be brought to designated O&M port and disposed according to regulations and guidelines
Grease (WTG) Refill of grease for main bearing, yaw bearing, blade bearing Bearings including yaw bearing and blade bearing 40 L per WTG Expected every year To be brought to designated O&M port and disposed according to regulations and guidelines
Diesel fuel (WTG and ESP) Fuel for the emergency diesel generator (if any) Diesel storage tank 3,000 L per WTG
21,560 L on ESP
Only as required To be brought to designated O&M port and disposed according to regulations and guidelines
Fire extinguishing agents (WTG and ESP) Inert gas extinguishing system (e.g., NOVEC, nitrogen, or similar) Various rooms To be defined during detailed design Not anticipated; only changed if needed To be brought to designated O&M port and disposed according to regulations and guidelines
Fire extinguishing agents (WTG and ESP) Manual extinguishers: powder, carbon dioxide (CO₂), foam Various locations WTG: To be defined during detailed design
11,000 L foam on ESP
Depends on fabrication To be brought to designated O&M port and disposed according to regulations and guidelines
Fire extinguishing agents (WTG and ESP) Other types (if any) Various locations To be defined during detailed design Not anticipated; only changed if needed To be brought to designated O&M port and disposed according to regulations and guidelines
Dielectric gas (electrical insulating gas) (WTG and ESP) Sulfur hexafluoride (SF₆) WTG: GIS switch gears
ESP: GIS switch gears
Onshore substation
Approx. 18 kilograms per WTG
2,320 kilograms on ESP
Not replaced To be brought to designated O&M port and disposed according to regulations and guidelines
Paint & coating (WTG and ESP) Corrosion protection of steel structure paints & varnishes Steel structure, various locations To be defined during detailed design Only for repairs To be brought to designated O&M port and disposed according to regulations and guidelines
Coolants or refrigerants (WTG and ESP) Water, glycol, other refrigerants Heating, Ventilation, and Air Conditioning unit, Air Handling Unit 1,600 L per WTG
Approx. 700 L to be replaced as part of scheduled maintenance
176 L on ESPs
Expected every 5-8 years To be brought to designated O&M port and disposed according to regulations and guidelines
Grout (WTG and ESP) Grout Grout for connection between monopile and transition piece Up to 40,000 L per WTG and ESP position Not anticipated; only changed if needed To be brought back to port and disposed according to regulations and guidelines

*ESP = electrical service platform; WTG = wind turbine generator

Submitted to the Bureau of Ocean Energy Management
September 30, 2022

Download original document: “Kitty Hawk Wind: Construction and Operations Plan. Chapter 3: Description of Proposed Activity

This material is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this material resides with the author(s). As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Queries e-mail.

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