Long term trial of a purpose built WTG gear oil
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Figure 1. Iron content by ICP -
Figure 2. Iron content v age of oil -
Figure 3. Total acid number mg KOH/gm -
Figure 4. Total acid number over time -
Figure 5. Kinematic viscosity -
Figure 6. Kinematic viscosity over time -
Figure 7. Water concentration by Karl Fischer titration -
Figure 8. Water concentration over time -
Figure 9. 5-year-plus oil performance in 74 wind turbines - iron content -
Figure 9. 5-year-plus oil performance in 74 wind turbines - viscosity -
Figure 9. 5-year-plus oil performance in 74 wind turbines - water content -
Figure 9. 5-year-plus oil performance in 74 wind turbines - TAN value