Katı Atık Enerji Santralinde Gaz Motoru ile Birleştirilmiş S-CO₂ Döngüsünün Eksergoekonomik Değerlendirmesi

Öz

Bu çalışmada, Türkiye'nin Bayburt şehrinde bulunan bir belediye katı atık termik santralinin (KAT) bir gaz motorundan süperkritik karbondioksit (S-CO₂) çevrimi uygulanarak egzoz atık ısısının geri kazanımı incelenmiştir. Kurulu gücü 1450 kW olan santralde, S-CO₂ sisteminin entegre edilmesiyle yaklaşık %7,5 ekstra güç üretimine karşılık gelen 108,65 kW ek güç üretilebilmektedir. Santralin gerçek verileri kullanılarak termodinamik model geliştirilmiş ve sistem performansının doğru bir şekilde değerlendirilmesi sağlanmıştır. Geliştirilen çevrimin enerjetik ve ekserjetik verimlilikleri, enerji transferi ve ekserji yıkım değerleri açısından belirlenmiştir. Ayrıca, santral bileşenleri için maliyet dağılımı ve yatırım öngörüleri sağlayan Özgül Ekserji Maliyetlendirme (SPECO) yöntemi kullanılarak eksergoekonomik analizler gerçekleştirilmiştir. Sonuçlar, S-CO₂ çevriminin birleştirilmesinin hem enerji hem de ekserji verimliliğini artırdığını ve aynı zamanda genel ekonomik performansı da iyileştirdiğini ortaya koymaktadır. Sonuç olarak önerilen sistem, katı atık bazlı enerji üretim santrallerinde atık ısının geri kazanımı için sürdürülebilir ve etkili bir çözüm sunmaktadır.

Anahtar Kelimeler

• S-CO2
• Waste-to-energy.
• Termo-ekonomik
• Optimizasyon
• Genetik Algoritma

Exergoeconomic Evaluation of a S-CO₂ Cycle Coupled with a Gas Engine in a Solid Waste Power Plant

Öz

In this study, the exhaust waste heat recovery from a gas engine of a municipal solid waste power plant (MSWPP) in Bayburt city, Turkey, through the application of a supercritical carbon dioxide (S-CO₂) cycle was investigated. The plant with an installed power capacity of 1450 kW, can be possible to generate an additional 108.65 kW of power by integrating the S-CO₂ system, corresponding to approximately 7.5% extra power production. A thermodynamic model was developed using actual data of the plant, enabling accurate assessment of system performance. The energetic and exergetic efficiencies of the developed cycle were determined in terms of energy transfer and exergy destruction values. Exergoeconomic analyses were also carried out using the Specific Exergy Costing (SPECO) method, providing cost allocation and investment insights for the plant components. The results reveal that the coupling of S-CO₂ cycle increases both the energy and exergy efficiencies, while also improving the overall economic performance. Consequently, the proposed system offers a sustainable and effective solution for the recovery of waste heat in solid waste-based power generation stations.

Anahtar Kelimeler

• S-CO2
• Thermo-economy
• Optimization
• Genetic Algorithm
• Waste-to-energy.

Kaynakça

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