Failure Cause Analysis—Fans

摘要

Surveys by the Edison Electric Institute (EEI) have identified power plant fans to be a significant cause of plant failures. This report contains the results of a study to identify fan problem areas, their causes and their effects.nA data base of 743 fans was prepared from questionnaires distributed by the Edison Electric Institute to U.S. utilities and by EPRI to the Tennessee Valley Authority. Additional information was obtained from personal contacts with various power company personnel, station records and reports, and EPRI files.nThe great majority of fans studied were centrifugal units used in forced draft, induced draft, primary air, and gas recirculating applications. As controllable-pitch axial fans have seen service only recently in the United States, the number of such fans available for study is relatively small.