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Necmettin Erbakan University Journal of Science and Engineering

2667-7989

Necmettin Erbakan Üniversitesi

10.47112/neufmbd.2024.50

Energy Generation, Conversion and Storage (Excl. Chemical and Electrical)

Enerji Üretimi, Dönüşüm ve Depolama (Kimyasal ve Elektiksel hariç)

Exergo-economic Analysis of an Geothermal Based Organic Rankine Cycle

Jeotermal Temelli bir Organik Rankine Çevriminin Eksergo-ekonomik Analizi

https://orcid.org/0000-0002-6772-9985

Hançer Güleryüz

Esra

https://orcid.org/0000-0002-8622-4990

Özen

Dilek Nur

NECMETTİN ERBAKAN ÜNİVERSİTESİ

08 31 2024

6 2 312 335 02 23 2024 05 07 2024

2019

Necmettin Erbakan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi

It is important to improve the utilization of renewable energy sources in electricity generation by integrating them with appropriate plants. In this regard, the use of organic Rankine cycle (ORÇ) comes to the forefront in electricity generation from low and medium temperature sources. This study presents energy, exergy and exergoeconomic analyzes (3E) of a geothermal-based conventional ORÇ. Modified Productive Structure Analysis (MOPSA) method was used as the exergo-economic analysis method. The MOPSA method is a method that allows costing the major exergy rate of plant elements, and in this respect it stands out from other exergoeconomic methods. As a result of the analyses, the overall exergy efficiency (η_ex) of the proposed plant was found to be 50.23%, while the plant element with the highest exergy destruction rate (〖Ex ̇〗_(D,k)) was the evaporator with a value of 43.97 kW. The total exergy destruction rate of the plant was found to be 70.67 kW and the unit cost of the exergy destruction (c_s) was calculated as 1.872 $/GJ. The total product unit cost (〖c_(p,total)〗^MOPSA) of the proposed plant is $3.662/GJ.

Elektrik üretiminde yenilenebilir enerji kaynaklarının uygun sistemlerle entegre edilerek kullanım alanlarının genişletilmesi önemli bir husustur. Bu doğrultuda, ORÇ kullanımı düşük ve orta sıcaklıkta kaynaklardan elektrik üretiminde ön plana çıkmaktadır. Bu çalışma, jeotermal tabanlı geleneksel Organik Rankine çevriminin (ORÇ) enerji, ekserji ve eksergo-ekonomik analizlerini (3E) içermektedir. Eksergo-ekonomik analiz yöntemi olarak Modifiye Edilmiş Üretim Yapısı Analizi (MOPSA) yöntemi kullanılmıştır. MOPSA yöntemi, sistem bileşenlerinin önemli ekserji oranlarının maliyetlendirilmesine olanak tanıyan bir yöntemdir ve bu yönüyle diğer ekserji-ekonomik yöntemlerden ayrılmaktadır. Analizler sonucunda, önerilen sistemin toplam ekserji verimliliği (η_ex) %50.23 olarak bulunurken, en yüksek ekserji yıkımına sahip sistem bileşeni 43.97 kW değeri ile evaporatör olmuştur. Sistemin toplam ekserji yıkım değeri 70.67 kW olarak bulunmuş ve ekserji yıkımının birim maliyeti (c_s) 1.872 $/GJ olarak hesaplanmıştır. Önerilen sistemin toplam ürün birim maliyeti (〖c_(p,total)〗^MOPSA) 3.662 $/GJ'dür.

Eksergo-ekonomik analiz MOPSA Organik Rankine çevrimi Jeotermal

Exergoeconomic analysis MOPSA Organic Rankine cycle Geothermal

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