Abstract
초록: 발전설비내공기예열기는보일러연소가스로부터열을회수하여유효열의손실을감소시킴으로서보일러의열효율을높이기위해설치된다. 본연구에서는계획예방정비가공기예열기의성능에미치는영향을고찰하였다. 공기예열기의성능지표들은공기예열기의계획예방정비전후의운전상태와성능변화모두를고려하여계산되었고, 공기예열기의중요한성능지표로는가스측온도효율, 공기누설률, 열회수율, 열관류율과열용량비들이다. 계획예방정비전후의공기예열기성능평가로부터공기예열기의모든성능지표가계획예방정비후향상되었다.Abstract: Air heater used in power plant helps increase the thermal efficiency of the boiler by recovering the heatfrom the boiler flue gas and thus preventing the loss of useful heat. This study investigates the effect of preventivemaintenance on the performance of the air heater in a power plant. Performance indexes for the air heater arecalculated to observe the changes in the performance and operation status of the air heater before and afterpreventive maintenance. The major performance indexes considered are temperature efficiency of the flue gas side,air leakage rate, heat recovery rate, heat transmission rate, and heat capacity ratio. The performance of the airheater is evaluated before and after preventive maintenance; our results show that all the abovementionedperformance indexes are improved after the maintenance.
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