응축수순환 폐열회수 EGR 보일러 시스템의 열역학적 효율 해석

초록

In this study, we proposed the condensate circulation waste heat recovery EGR boiler system in order to maximize thermodynamic efficiency which is able to obtain in existing boiler system. We calculated the efficiency of the condensate circulation waste heat recovery EGR boiler system and selected 3 different boiler systems(general boiler, waste heat recovery boiler and condensate circulation waste heat recovery boiler) to compare the efficiency of them. As results, the efficiency of the condensate circulation waste heat recovery EGR boiler is calculated to 93.7 % and it has a higher 6.5% efficiency than that of general boiler(case 1). The dew point is increased as the relative humidity of heated air is increased by condensate circulation. Consequently the boiler system presented in this study shows a higher efficiency than case 1 by generating much condensate.