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Title:
DIRECT-DRIVE POWER CONVERSION SYSTEM FOR WIND TURBINES COMPATIBLE WITH ENERGY STORAGE
Document Type and Number:
WIPO Patent Application WO/2014/203230
Kind Code:
A3
Abstract:
A system is described which is suitable for extracting power directly from the main shafts of slow-moving mechanical systems such as wind-turbines. At the heart of this system is a closed gas circuit having a lower- pressure (LP) side and a higher-pressure (HP) side. Although a substantial pressure ratio exists between the two sides, even the LP side is at a pressure substantially greater than atmospheric pressure. This fact alone allows that direct drive machines coupled to the wind turbine rotors can be relatively small and affordable. The system comprises primary compressors coupled to the wind turbines, thermal stores coupled to heat-exchangers on both the LP and HP sides of the closed gas circuit, a secondary motor-compressor set and an expander-generator set. With these items, the system allows some degree of independence between the input power resource and the output power at any one time. When substantial wind power is present and the demand for electrical power is weak, this system can export a fraction of the energy captured and store the rest. When the wind resource is low, the system can export more power than is being collected by drawing exergy from the thermal stores.

Inventors:
GARVEY, Seamus Dominic (School of Mechanical, Materials and Manufacturing EngineeringITRC Building,The Unversity of Nottingham,University Park, Nottingham NG7 2RD, GB)
Application Number:
IB2014/063630
Publication Date:
April 23, 2015
Filing Date:
August 01, 2014
Export Citation:
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Assignee:
GARVEY, Seamus Dominic (School of Mechanical, Materials and Manufacturing EngineeringITRC Building,The Unversity of Nottingham,University Park, Nottingham NG7 2RD, GB)
International Classes:
F16H39/01; F03D9/00
Domestic Patent References:
WO2014053662A12014-04-10
WO2010125568A22010-11-04
Foreign References:
US20110041501A12011-02-24
GB499308A1939-01-17
US4229661A1980-10-21
US2120546A1938-06-14
GB510631A1939-08-04
FR679672A1930-04-16
US20090021012A12009-01-22
US3988897A1976-11-02
US20080050234A12008-02-28
Attorney, Agent or Firm:
SKINNER, Michael et al. (48 Friar Gate, Derby DE1 1GY, GB)
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