| The application of the direct air-cooling units are popularized in the northern area of our country where the water is lacking and the coal is abundant. This paper do some exploring research and analysis link with characteristic and the operation experience of our country first 600MW direct air-cooling unit in generate electricity the limited liability company of China Guodian Corporation about the operation optimization of 600MW direct air-cooling units under the north China typical climatic conditions. The conclusion can enhances the security and economical operation level of the 600MW direct air-cooling units. |