Title:
A METHOD FOR IMPROVING THE COOLING CAPACITY OF A DIRECT AIR COOLING SYSTEM OF POWER PLANTS AND SUCH A COOLING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2010/060235
Kind Code:
A1
Abstract:
A method for improving the cooling capacity of a direct air cooling system of power plants involves the following steps: connecting a motor into an electric network voltage by a transformer in the cooling system, and outputting a voltage to the motor so that its working voltage is 380-390 V; outputting a frequency of 40-47 Hz to the motor by a frequency converter in the cooling system; driving a fan to rotate at a setting speed ratio via a reducer by the motor that operates at the voltage of 380-390 V and the frequency of 40-47 Hz; transporting the cooling wind produced by the rotation of the fan to a heat radiator. By the method, the output torque of the motor is increased and the regulation range of the fan is widened, so as to improve the cooling capacity of the direct air cooling system.
Inventors:
HAN CHUNJIANG (CN)
GUO PENG (CN)
GONG YUYANG (CN)
GUO PENG (CN)
GONG YUYANG (CN)
Application Number:
PCT/CN2008/001974
Publication Date:
June 03, 2010
Filing Date:
December 05, 2008
Export Citation:
Assignee:
CHINA DATANG TECHNOLOGIES & EN (CN)
HAN CHUNJIANG (CN)
GUO PENG (CN)
GONG YUYANG (CN)
HAN CHUNJIANG (CN)
GUO PENG (CN)
GONG YUYANG (CN)
International Classes:
F01D25/12; F28B11/00; F28B1/06; H02P27/04
Foreign References:
| CN101430167A | 2009-05-13 | |||
| JPH11132675A | 1999-05-21 | |||
| JPS61121799A | 1986-06-09 | |||
| GB464531A | 1937-04-20 |
Other References:
LIANG, WEIPING ET AL.: "Analysis on the energy-saving performance of frequency conversion and speed governing system for direct air-cooling fans.", ELECTRIC POWER., vol. 41, no. 9, September 2008 (2008-09-01), pages 58 - 60
ZHAO, ZHIDONG ET AL.: "Development and Present Situation of Air-cooled Condenser.", NORTH CHINA ELECTRIC POWER., no. 5, May 2004 (2004-05-01), pages 44 - 50
LIU, WEIXING ET AL.: "Application of Air Cooled Condenser System in Coal-fired Plants.", ELECTRIC POWER SCIENCE AND ENGINEERING., no. 3, September 2004 (2004-09-01), pages 72 - 74
ZHAO, ZHIDONG ET AL.: "Development and Present Situation of Air-cooled Condenser.", NORTH CHINA ELECTRIC POWER., no. 5, May 2004 (2004-05-01), pages 44 - 50
LIU, WEIXING ET AL.: "Application of Air Cooled Condenser System in Coal-fired Plants.", ELECTRIC POWER SCIENCE AND ENGINEERING., no. 3, September 2004 (2004-09-01), pages 72 - 74
Attorney, Agent or Firm:
BEIJING JOYSHINE INTELLECTUAL PROPERTY OFFICE (Fangzheng BuildingNo. 298 Chengfu Road,Haidian District, Beijing 1, CN)
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