Thermoeconomic Performance Analysis of Steam Boilers of a Power Plant Operating with Various Fuels

Yıl 2019, Cilt: 31 Sayı: 4, 286 - 294, 01.11.2019

Mehmet Selçuk Mert

https://doi.org/10.7240/jeps.492429

Öz

Energy
consumption is one of the most concerned topics of the industry, and the cost
of energy represents a large proportion of operating expenditure for
energy-intensive sectors. In the analysis and design of industrial processes,
mainly thermodynamics is often used with economic principles to obtain the
optimum design for energy-efficient systems. The performance of the system can
be analyzed via applying the conservation principles of energy that is defined
by the first law of thermodynamics. However, only regarding the conservation of
energy is not sufficient to determine the real performance of the system. At
this point, an exergy analysis is done to predict the useful part of the
energy, also to provide the magnitudes and places of the irreversibilities and
losses within the system. Moreover, the thermoeconomic analysis is done for
providing useful information to design and operate a cost-effective system. In
this study, the thermoeconomic analysis of the steam boilers in a power plant
was performed. The simulations of the steam boilers were done by using the Aspen
HYSYS simulation software. The mass, energy and cost balance equations were
obtained for the boilers to determine the effect of various fuels on the
process economics.

Anahtar Kelimeler

Energy, Exergy, Thermoeconomic Analysis, Steam Boiler, Simulation

Çeşitli Yakıtlarla Çalışan Bir Santralin Buhar Kazanlarının Termoekonomik Performans Analizi

Öz

Enerji
tüketimi, endüstrinin en önemli konularından biridir ve enerji maliyeti, enerji
yoğun sektörler için işletme giderlerinin büyük bir bölümünü oluşturur. Endüstriyel
proseslerin analizinde ve tasarımında, enerji verimli bir sistem için en uygun
tasarımı elde etmek üzere temel olarak termodinamik ve ekonomik prensipler
birlikte kullanılır. Sistemin performansı, termodinamiğin birinci yasası
tarafından tanımlanan enerji korunumu prensipleri uygulanarak analiz
edilebilir. Ancak, sadece enerji korunumu prensibi sistemin gerçek
performansını belirlemek için yeterli değildir. Bu noktada, enerjinin yararlı
kısmının belirlenmesi için ekserji analizi yapılır, ayrıca sistem içindeki
tersinmezliklerin ve kayıpların büyüklüklerini ve yerleri de belirlenir. Buna
ilaveten, maliyet-etkin bir sistem tasarlamak ve işletmek üzere faydalı bilgi
sağlamak için termoekonomik analiz yapılır. Bu çalışmada, bir santralin buhar
kazanlarının termoekonomik analizi gerçekleştirilmiştir. Buhar kazanlarının
simülasyonları Aspen HYSYS simülasyon yazılımı kullanılarak yapılmıştır. Kazanlar
için kütle, enerji ve maliyet dengesi denklemleri çeşitli yakıtların proses
ekonomisi üzerindeki etkisini belirlemek üzere elde edilmiştir.

Anahtar Kelimeler

Enerji, Ekserji, Termoekonomik Analiz, Buhar Kazanı, Simülasyon

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