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Wind turbine generator with heat exchanger

A technology of wind turbines and heat exchangers, applied in wind turbine components, wind engines, wind power generation, etc., can solve problems such as complex systems, unsuitable for practical applications, and inability to provide cooling for WTG heating elements, and achieve high heat exchange rates Effect

Inactive Publication Date: 2010-12-22
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, these systems are either too complex for practical application, or do not provide adequate and reliable cooling of the WTG heat-generating elements

Method used

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  • Wind turbine generator with heat exchanger
  • Wind turbine generator with heat exchanger
  • Wind turbine generator with heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Figure 1 is a schematic cross-sectional view of a wind turbine generator (WTG) 1 according to the invention. The WTG 1 comprises one or more rotatably mounted blades 2 connected to a nacelle 3 by a first rotatable shaft 4 . The gondola 3 is pivotally mounted on the upper part 5 of the mast. The first shaft 4 is further connected to a gearbox 6, which significantly increases the low rotational speed of the blades 2 and transmits the increased rotational speed through the second shaft 8 to the generator 7, where the rotational energy is electromagnetically converted into electrical energy. A typical rotational speed of the first shaft is 10-20 revolutions per minute (RPM), and a typical rotational speed of the second shaft 8 is 1000-1500 RPM. Such high gear ratios in gearbox 6 may require cooling. Generator 7 similarly requires cooling. In the following embodiments, the invention will be further explained with reference to the gearbox 6 and the generator 7, but the tea...

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PUM

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Abstract

The present invention relates to a wind turbine generator with a heat-generating source, e.g. a generator or a gearbox. A primary and a secondary cooling circuit, arranged for circulating a first and a second fluid, respectively between the heat-generating source and a heat exchanger, and a cooling reservoir and the heat exchanger, respectively. The heat exchanger comprises a plurality of pipes for conveying the second fluid from the secondary cooling circuit through the heat exchanger, the plurality of substantially parallel pipes being arranged for heat exchange with a flow of the first fluid from the primary cooling circuit. The secondary cooling circuit further comprises a dispersion chamber connected to the plurality of pipes, the dispersion chamber having a fluid intake being positioned sideways relative to the plurality of pipes so as to provide, at least partly, a levelling of the flow distribution across the plurality of pipes of the second fluid prior to heat exchange. The invention provides an improved and more compact heat exchanger due to the more uniform flow distribution of the second fluid.

Description

technical field [0001] The invention relates to a wind turbine generator comprising a heat exchanger and first and second cooling circuits for cooling a heat generating source in the wind turbine generator, eg a gearbox or a generator. The invention also relates to a general purpose heat exchanger and a method of cooling a heat generating source using such a heat exchanger. Background technique [0002] Typically, a wind turbine generator (WTG) has one or more rotor blades rotatable about a horizontal axis mounted in a nacelle. The nacelle is pivotable about a vertical axis to turn the rotor blades into proper alignment with the wind direction. One or more rotor blades rotate at a speed dependent on the wind and the aerodynamic structures on the rotor blades to drive a generator that converts wind energy into electrical energy. Typically, the generator is connected to the rotor blades through an intermediate gearbox arranged to boost the inherently low rotational speed of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00
CPCF28D15/00Y02E10/722F28D7/1615F28F9/026Y02E10/72F28D1/024F28D2021/0028F03D11/00F28F9/0263F28D7/1653F05B2260/20F03D80/60
Inventor M·V·R·S·延森
Owner VESTAS WIND SYST AS