Method and installation for extracting energy from a flowing fluid
AssigneeStichting Energieonderzoek Centrum Nederland
InventorsGustave Corten, Pieter Schaak
Life of this patent
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Abstract
Turbine farm comprising at least a first turbine and at least a second turbine for energy extraction from a flowing fluid, wherein when the second turbine is on the lee side of the first turbine, under nominal power, the axial induction of the first turbine is lowered with respect to the second turbine, to reduce turbulence mainly at the location of the at least second turbine.
Claims29
Turbine farm comprising at least a first turbine and at least a second turbine for energy extraction from a flowing fluid wherein the second turbine is on the lee side of the first turbine, under nominal power, the axial induction (a) of the first turbine is lowered with respect to the second turbine, by turning the blade angles of a rotor of the first turbine towards a feathering position.
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Method for a turbine farm comprising at least one first turbine and an at least second turbine for energy extraction from a flowing fluid, wherein
- lowering the axial induction (a) of the first turbine with respect to the second turbine when the second turbine is on the lee side of the first turbine, under nominal power, by turning the blade angles of the rotor of the first turbine towards a feathering position.
Design software for a turbine farm comprising at least a first turbine and at least a second turbine for energy extraction from a flowing fluid,
- wherein the design software is able to calculate a favourable installation and a favourable method for the turbine farm,
- wherein the software is able to
- add guiding elements to the installation, and/or where turbines have a guiding function, and
- when the second turbine is on the lee side of the first turbine, under nominal power, the axial induction (a) of the first turbine is lowered with respect to the second turbine by turning the blade angles of the rotor of the first turbine towards a feathering position, to calculate the influence thereof on the turbine farm.
Control software for a turbine farm comprising at least a first turbine and at least a second turbine for energy extraction from a flowing fluid,
- wherein the control software is able to determine at least one of meteorological parameters comprising wind speed and wind direction, temperature distribution and stability of the atmosphere
- and to determine and set the power of the turbine farm as a function of at least one of parameters that can be set, comprising axial induction, speed of revolution, the rotor blade angle, angle of inclination, circulation scale and positions of the turbines,
- wherein the control software is able
- when the second turbine is on the lee side of the first turbine, under nominal power, to lower the axial induction (a) of the first turbine with respect to the second turbine by turning the blade angles of the rotor of the first turbine towards a feathering position.
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Control system for a turbine farm comprising at least a first turbine and at least a second turbine for energy extraction from a flowing fluid, wherein the control system is able, when the second turbine is on the lee side of the first turbine, under nominal power, to lower the axial induction (a) of the first turbine with respect to the second turbine by turning the blade angles of the rotor of the first turbine towards a feathering position.
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Turbine provided with control system wherein the control system includes at least a first turbine and at least a second turbine for energy extraction from a flowing fluid, characterised in that the control system is able, when the second turbine is on the lee side of the first turbine, under nominal power, to lower the axial induction (a) of the first turbine with respect to the second turbine by turning the blade angles of the rotor of the first turbine towards a feathering position.
Dependencies are inferred from the claim text.