Thermodynamic Analysis and Performance Comparison of Flash Binary Geothermal Power Generation Plant

Öz

In this study, the thermodynamic analysis of the geothermal energy-assisted flash binary power generation cycle has been examined and compared according to different fluids. This study consists of a direct steam turbine and an organic Rankine cycle, and also performance comparison is investigated using n-butane, isobutane, and isopentane working fluids in the organic Rankine cycle. The energy and exergy efficiencies as well as the total irreversibility of the proposed system are investigated for three different fluids. In addition, the effects of changes in parameters such as environmental temperature, geothermal water outlet temperature, and pressure values on system efficiencies and power generation are investigated parametrically and the results are presented graphically. According to the analysis results, the total power generation rates are calculated as 3624 kW for n-butane, 3613 kW for isobutane, and 3495 kW for isopentane. Moreover, for the entire system, the highest energy and exergy efficiencies are calculated at 13.49% and 51.97% for the n-butane fluid, respectively.

Anahtar Kelimeler

• geothermal
• energy
• exergy
• thermodynamic
• ORC

Flaş İkili Jeotermal Güç Üretim Santralinin Termodinamik Analizi ve Performans Karşılaştırması

Öz

Bu çalışmada, jeotermal enerji destekli flaş ikili güç üretim çevriminin termodinamik analizi farklı akışkanlara göre incelenmiş ve karşılaştırılmıştır. Bu çalışma, bir direk buhar türbini ve bir adet organik Rankine çevriminden meydana gelmektedir ve organik Rankine çevriminde n-bütan, izobütan ve izopentan soğutucu akışkanları kullanılarak performans karşılaştırılması incelenmiştir. Önerilen sistemin enerji ve ekserji verimlilikler ve ayrıca toplam tersinmezlikleri üç farklı akışkan türü için araştırılmıştır. Ayrıca, çevre sıcaklığı, jeotermal su çıkış sıcaklık ve basınç değerleri gibi parametrelerin değişiminin sistem verimlilikleri ve güç üretimi üzerine etkileri parametrik olarak araştırılmış ve sonuçlar grafiksel olarak sunulmuştur. Analiz sonuçlarına göre, toplam güç üretimi n-bütan için 3624 kW, izobütan için 3613 kW ve izopentan için 3495 kW olarak hesaplanmıştır. Dahası, tüm sistem için, en yüksek enerji ve ekserji verimlilikleri n-bütan akışkanında sırasıyla 13.49% ve 51.97% olarak hesaplanmıştır

Anahtar Kelimeler

• jeotermal
• enerji
• ekserji
• termodinamik
• ORC

Kaynakça

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