PATENTED OVERPRESSURE PRINCIPLE
Maintains controlled internal pressure to reduce uncontrolled ingress of humid and salt-laden offshore air.
APPLICATION KNOW-HOW
Developed specifically for offshore wind turbines exposed to marine humidity, salt aerosol and pressure fluctuations.
ADSORPTION DRYING PRINCIPLE
Rotor-based adsorption technology removes moisture from the internal air column and helps prevent condensation.
DESALTING FUNCTION
By filtering incoming air and continuously drying the internal air column, the system progressively reduces salt contamination inside the structure.
Frequently Asked Questions
For our full FAQ section you can go to www.cotes.com/FAQ
On this page we highlight some of the more frequently asked questions from customers.
Traditional dehumidification systems must continuously treat incoming humid air. In offshore environments this results in a large and constant drying load.
The Wind Overpressure strategy instead limits how much external air enters the structure. By maintaining a slight internal overpressure, the ingress of humid and salt-laden air is reduced.
Because less external air enters the tower, the system primarily stabilises and dries the internal air column rather than continuously treating new air.
Salt particles enter turbines through ventilation, pressure differences and service access. Combined with humidity, salt accelerates corrosion and electrical failures.
The CWO system progressively removes salt from the internal air column while limiting additional salt ingress.
The system continuously stabilises the internal air column while limiting additional humidity and salt entering the structure.
CWO systems were originally developed for offshore wind turbines, where humidity and salt exposure are constant and environmental conditions are particularly aggressive.
However, the same mechanisms can also occur in coastal or nearshore onshore turbines, where waves and strong coastal winds inject salt aerosol into the air. In these environments, salt-laden humidity can enter the turbine through ventilation openings, service access and pressure differences.
In such cases, the desalting and humidity stabilisation capabilities of the CWO concept can also be relevant, even though the system is primarily associated with offshore installations.
For inland onshore turbines without significant salt exposure, other solutions such as Cotes Mobile Wind systems are typically sufficient.