DOT concept
By using a seawater pump instead of a generator we aim to reduce the weight of the turbine by up to 50%. This enables significant cost and maintenance reduction for future turbine designs.
The high-pressure water can be converted into power, clean water or hydrogen.
- 50% weight reduction
- Significant cost reduction
- Reduced maintenance
- Flexible end-application technology
Sustainable products
We deliver flexible end products for a fixed price
Innovation track record
All our innovations are supported by an extensive track record of studies, prototypes and offshore testing. Our approach is to
“put steel in the water”: relentlessly testing the concepts in its designated environment of operation.
Look through our innovations to find out more.
Hydraulic Drivetrain
The core of the DOT concept is a sea water pump directly driven by the turbine rotor. It is capable of slow rotation speed, high pressure and high-power output.
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Wind Turbine
Operating a water-pumping wind turbine allows for different control strategies. DOT develops these during the integration of the pump in different turbine platforms.
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Pelton Turbine
Power conversion from high-pressure seawater is done using hydropower technology a pelton wheel driving a generator. DOT creates an unprecedented 4km hydraulic head.
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Reverse Osmosis
High pressure seawater can also be used through a reverse osmosis system. The DOT turbine takes out several energy conversion steps to arrive at renewably cleaned water for drinking, irrigation or H2 production.
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Slip Joint
Speedy installation of the thousands of megawatts offshore wind is crucial to meet the Paris goals. The slip joint removes many cumbersome offshore handling operations, allowing single lift turbine installation.
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Installation
Beyond the slip joint, DOT supports innovations on pile driving technology, monopile design and cable and pipeline installation. The “steel in the water” drive makes DOT a valuable partner in Joint Industry Projects.
Read more >Positive Displacement
Our team
- Dedicated team of experts & engineers
- Proven track record executing complex technology projects and R&D
- Strong industry network
Press
TU Delft on board the world largest crane vessel for exploring future Offshore Wind Turbines
“Wind energy is on the leading edge of a current environmental revolution. The FOX project’s pioneering offshore installation, gives the chance to gather unique data, important to shape the future of offshore wind farms!” quote by David Fidalgo Domingos. Click here for the article on TUDelft.nl
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Heerema Tests Floating Installation of XXL Turbines Method Offshore
“Heerema Marine Contractors has completed the first offshore test of a novel method of assembling and installing XXL wind turbines onboard a floating, dynamically positioned (DP) vessel.“ Heerema performed the demonstration project, known as Floating Offshore installation of XXL Wind Turbines (FOX), in collaboration with DOT and the Delft University of Technology (TU Delft) to […]
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Follow-up project: HyPE-ST 1.2
“Hydraulic Pile Extraction Scale Tests for testing the removal of piles from the soil at the end of their operational life.” Open the GROW article
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