Hidrojen Üretimi için Üç Adımlı Cu-Cl Termokimyasal Sistemin Enerji ve Ekserji Analizi

Yıl 2020, Cilt: 7 Sayı: 1, 79 - 92, 31.01.2020

Vahit Çorumlu , Murat Öztürk

https://doi.org/10.31202/ecjse.585881

Öz

Termokimyasal çevrim sistemleri yenilenebilir enerji
kaynaklarından elde edilen ısı ve elektrik enerjisini kullanarak sera gazları
salınımı olmadan hidrojen üretimi yaparlar. Sunulan çalışmada tasarlanan yüksek
sıcaklık Cu-Cl termokimyasal çevrim sisteminin enerji ve ekserji analizleri
gerçekleştirilmiştir. Yapılan analizler farklı referans sıcaklık değerleri ve
değişen reaksiyon sıcaklıklarına göre incelenerek parametrik çalışmalar
oluşturulmuştur. Çevrimin her bir adımı için ekserji hızları, ekserji yıkımları
ve tüm çevrimin ekserji verimi araştırılmıştır. 25 ^oC referans çevre
sıcaklığında Cu-Cl termokimyasal çevrimin enerji ve ekserji verimleri sırasıyla
55.41% ve 66.09% bulunmuştur. Ayrıca incelenen sistemdeki en büyük ekserji
yıkımı hidrojen üretim adımında gerçekleşmiştir.

Anahtar Kelimeler

Cu-Cl, hidrojen, ekserji, verim

Energy and Exergy Analysis of Three-Step Cu-Cl Thermochemical System for Hydrogen Production

Öz

Thermochemical
cycle systems produce hydrogen without the release of greenhouse gases using
heat and electrical energy from renewable energy sources. In this study, the energy
and exergy analyses of designed high-temperature Cu-Cl thermochemical
conversion system are performed. Parametric studies are carried out by
examining the analyses according to different reference temperature values and
reaction temperatures. The exergy rates and exergy destruction rates for each
step of cycle, and also the exergy efficiency of system are investigated. The
energy and exergy efficiencies of Cu-Cl thermochemical cycle at a reference
ambient temperature of 25 °C are found as 55.41% and 66.09%, respectively. In
addition, the maximum exergy destruction in the investigated system occurred in
the hydrogen production step.

Anahtar Kelimeler

Cu-Cl, hydrogen, exergy, efficiency

Kaynakça

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