Installation Process

Installation of the Borealis de-icing system minimizes downtime and cost commonly associated with retrofit solutions. There is no need to use cranes to remove the blades, no need for rope access, and no lost production overnight.

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Case Studies

Case Study 1: Predicted vs. Measured Conditions and Results

This image shows a heated 50-meter long blade. This is an infrared photo taken from the ground of an 80-meter tower. The heating is targeted to the leading edge of the blade, which you can see from the spot temperatures. The leading edge shows a temperature between 15.7°C and 21.2°C depending on the location. Due to the distance that the infrared photo was taken from, there may be +/-2°C of error.

This table shows the predicted temperatures and the measured temperatures. The ambient conditions where -2°C degrees Celsius with wind speed around 2.2m/s. The predicted blade surface temperature was between 14.5°C to 20.0°C.

Turbine: Idle Predicted Measured
Ambient Temperature (°C) -2 -2
Wind Speed (m/s) 2.2 1.2 to 3.2
Blade Surface Temperature (°C) 14.5 to 20.0 15.7 to 21.2 (+/-2)

Case Study 2: Predicted vs. Measured Conditions and Results

This image shows a heated 50-meter long blade. This is an infrared photo taken from the ground of an 80-meter tower. The heating is targeted to the leading edge of the blade, which you can see from the spot temperatures. The leading edge shows a temperature between 8.3°C and 13.6°C depending on the location. Due to the distance that the infrared photo was taken from, there may be +/-2°C of error.

This table shows the predicted temperatures and the measured temperatures. The ambient conditions where -7°C degrees Celsius with wind speed around 5.8 m/s. The predicted blade surface temperature was between 6.3°C to 12.9°C.

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Turbine: Idle Predicted Measured
Ambient Temperature (°C) -7 -7
Wind Speed (m/s) 5.8
4.8 to 6.8
Blade Surface Temperature (°C) 6.3 to 12.9 8.3 to 13.6 (+/-2)

System Performance

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The above photos show before, left, and after, right, of a wind turbine that was using the Borealis de-icing system. In under 30 minutes the ice buildup was shed, and the turbine was able to resume operation. A de-icing time of under 30 minutes would be expected in most conditions.

Electrical Integration

The Borealis De-icing system consists of the blade heating system, a blade control cabinet in each blade, a hub control cabinet and a nacelle control cabinet. The control system integrates with the turbine safety chain, and collects data from the SCADA system. Depending on the turbine model, an additional feeder circuit and slip ring upgrade may be required.

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Risk Mitigation  

A network of sensors installed throughout the turbine actively monitors system health and protects the wind turbine. We are constantly developing our system in collaboration with academic test centers, third-party research organizations, and industry partners to ensure that Borealis Wind de-icing products provide the highest levels of safety, reliability, and value to the owner and operator.

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