Dergiler / Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji / 2013 / Cilt: 1 - Sayı: 2
Dolasımlı Akıskan Yataklı Bir Isıl – Güç Çevrim Santralinin Simülasyonu ve Duyarlılık Analizi
- Sayfa
- 37–47
- DOI
- —
Özet
Ülkemizde kullanılan linyitlerin oldukça düsük kalorili olusları, ayrıca içersinde yanmayı olumsuz yöndeetkileyen ve hava kirletici emisyonlara neden olan nem, kül, kükürt ve uçucu maddelerin yüksek oranlarda bulunması nedeniyle; alısılmıs yakma sistemlerinde gerekli biçimde temiz ve verimli yakılamamaktadır. Düsük kaliteli kömürlerin yakılması güçlüğüne karsı ve de emisyonların azaltılması bakımından en uygun yakma sistemleri, akıskan yataklı yakma sistemleridir. Bu tür yakma sistemleri, enerji kullanım verimi ve çevre
Abstract
As a consequence of the facts that the lignite used in our country has extremely low calorific values and contain volatile materials such as moisture, ash, sulfur causing air pollutant emissions; so this type of lignite cannot be burned efficiently and cleanly in the usual combustion systems. The most suitable combustion methods for surpassing the combustion difficulties of low quality coals and decreasing the emission rates shall be the fluidized bed combustion systems. This type of combustion systems shall provide an alternate solution for effectiveness of energy usage and problem of environmental pollution. Therefore, in order to provide effective GU J Sci Part:C, 1(2):37-47 (2013)/ Murad A. RAHİM, Duygu GÜNDÜZ and clean combustion of lignite it is required to provide a suitable medium such us; heat, turbulence and including structural means for prohibiting particularly SO2, NOx and dust emissions. In this study, coal fired circulating fluidized bed combustion system had been simulated by using THERMOFLEX packet program and sensitivity analysis was carried out for the system for determination of parameters for optimization. As shown from the results that, increasing the high pressure steam pressure, the net power output and net electrical efficiency increases by 1.54% and 2.70%, respectively. Also, increasing the secondary air inlet to fluidized bed will decrease in net power output by 0.34% but the net electrical efficiency will increase by 0.56%. Increasing the excess air at fluidized bed, increases the net power output by 2.10% but the net electrical efficiency will decrease by 0.37%