Analisis Heat Loss pada Air Preheater dan pengaruh terhadap Efisiensi Boiler Circulating Fluidized Bed (Cfb)

Abstract

A tubular air preheater plays an important role to increase the efficiency of circulating fluidized bed (CFB) boiler. But after several years of operation, in Tenayan Steam Power Plant there was a leak in the air preheater. Therefore, in this study an analysis of heat loss in the air preheater and the effect on boiler efficiency is carried out by calculating the effectiveness value of the air preheater and heat loss that occurs in the air preheater and seeing the effect on boiler efficiency with support of Aspen Plus Simulation. From this study, it was found that the effectiveness value of air preheater is 74,68% and heat loss is 25,31%. Boiler efficiency without heat loss in air preheater is 76,25%, boiler efficiency with operasional heat loss in air preheater (25,31%) is 74,89%, which is an effect of 1,36% when compared to before the heat loss in air preheater, boiler efficiency with 15% heat loss variation in air preheater is 75,47% an effect of 0,78% when compared to boiler efficiency without heat loss in air preheater, and with 35% heat loss variation in air preheater is 74,29% an effect of 1,96% of boiler efficiency without heat loss in air preheater