A Study of a Supercritical Closed Cycle with Independent Power Turbine

Volkan Ceylan; Arif Emre Özgür

Article Details

A Study of a Supercritical Closed Cycle with Independent Power Turbine

Authors:

Volkan Ceylan | Arif Emre Özgür

Publisher:

Burdur Mehmet Akif Ersoy University

Main Topics:

Enerji

Journal:

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.15 Issue 2, pp.125-136

Document Type:

Article

Publication Date:

12/2024

Document Language:

Turkish

Document ID (Org No.):

2001335533

pISSN:

1309-2243

Keywords:

Abstract:

 In this study, thermodynamic analysis of a transcritical closed cycle with independent power turbine was performed. Carbon dioxide CO2, which stands out with its thermophysical properties, was preferred as the cycle fluid. In addition to the cycle based on the Brayton power cycle, an independent power turbine was added and the cycle parameters were examined. Analysis of the cycle Thermodynamic calculations of the cycle were made using the computer program called Engineering Equation Solver EES. The effects of turbine inlet temperature and pressure, compressor pressure ratio, compressor efficiency, high and low independent pressure turbine efficiency and compressor inlet temperatures on the energy-exergy efficiency and net power of the cycle under different cycle parameters were examined. Additionally, the effects of the low-pressure independent turbine in the cycle were evaluated. When the turbine parameters were examined, it was determined that the low-pressure independent turbine directly affected the cycle efficiency by 4.12. In the cycle parameters, maximum energy efficiency was calculated as 20.07, exergy efficiency was 39.22 and cycle net power was calculated as 306.4 kW. In power cycles, the benefits of using CO2 turbines and the effects of a low-pressure independent turbine on the cycle have been evaluated. The gains that can be achieved regarding CO2 turbines are discussed.

 In this study, thermodynamic analysis of a transcritical closed cycle with independent power turbine was performed. Carbon dioxide CO2, which stands out with its thermophysical properties, was preferred as the cycle fluid. In addition to the cycle based on the Brayton power cycle, an independent power turbine was added and the cycle parameters were examined. Analysis of the cycle Thermodynamic calculations of the cycle were made using the computer program called Engineering Equation Solver EES. The effects of turbine inlet temperature and pressure, compressor pressure ratio, compressor efficiency, high and low independent pressure turbine efficiency and compressor inlet temperatures on the energy-exergy efficiency and net power of the cycle under different cycle parameters were examined. Additionally, the effects of the low-pressure independent turbine in the cycle were evaluated. When the turbine parameters were examined, it was determined that the low-pressure independent turbine directly affected the cycle efficiency by 4.12. In the cycle parameters, maximum energy efficiency was calculated as 20.07, exergy efficiency was 39.22 and cycle net power was calculated as 306.4 kW. In power cycles, the benefits of using CO2 turbines and the effects of a low-pressure independent turbine on the cycle have been evaluated. The gains that can be achieved regarding CO2 turbines are discussed.

 In this study, thermodynamic analysis of a transcritical closed cycle with independent power turbine was performed. Carbon dioxide CO2, which stands out with its thermophysical properties, was preferred as the cycle fluid. In addition to the cycle based on the Brayton power cycle, an independent power turbine was added and the cycle parameters were examined. Analysis of the cycle Thermodynamic calculations of the cycle were made using the computer program called Engineering Equation Solver EES. The effects of turbine inlet temperature and pressure, compressor pressure ratio, compressor efficiency, high and low independent pressure turbine efficiency and compressor inlet temperatures on the energy-exergy efficiency and net power of the cycle under different cycle parameters were examined. Additionally, the effects of the low-pressure independent turbine in the cycle were evaluated. When the turbine parameters were examined, it was determined that the low-pressure independent turbine directly affected the cycle efficiency by 4.12. In the cycle parameters, maximum energy efficiency was calculated as 20.07, exergy efficiency was 39.22 and cycle net power was calculated as 306.4 kW. In power cycles, the benefits of using CO2 turbines and the effects of a low-pressure independent turbine on the cycle have been evaluated. The gains that can be achieved regarding CO2 turbines are discussed.

 Bu çalışmada, bağımsız güç türbinli transkritik kapalı çevrimin termodinamik analizi yapılmıştır. Çevrim akışkanı olarak termofiziksel özellikleriyle ön plana çıkan karbondioksit CO2 akışkanı tercih edilmiştir. Brayton güç çevrim esasına dayalı çevrime ek olarak bağımsız bir güç türbin ilave edilerek çevrim parametreleri incelenmiştir. Çevrimin analizi Engineering Equation Solver EES adlı bilgisayar programından faydalanılarak çevrimin termodinamik hesaplamaları yapılmıştır. Farklı çevrim parametrelerinde türbin giriş sıcaklık ve basıncının, kompresör basınç oranı, kompresör verimi, yüksek ve alçak bağımsız basınçlı türbin veriminin ve kompresör giriş sıcaklıklarının çevrimin enerji-ekserji verimine ve çevrim net gücüne etkileri incelenmiştir. Bununla birlikte çevrimdeki alçak basınçlı bağımsız türbinin çevrim üzerindeki etkileri değerlendirilmiştir. Türbin parametreleri incelendiğinde alçak basınçlı bağımsız türbinin çevrim verimine doğrudan 4.12 etki ettiği tespit edilmiştir. Çevrim parametrelerinde maksimum enerji verimi 20.07, ekserji verimi 39.22 ve çevrim net gücü 306.4 kW olarak hesaplanmıştır. Güç çevrimlerinde, CO2 türbinlerinin kullanımının sağladığı faydalar ve alçak basınçlı bağımsız türbinin çevrime etkileri değerlendirilmiştir. CO2 türbinleri ile ilgili elde edilebilecek kazanımlar tartışılmıştır.

Article Details

A Study of a Supercritical Closed Cycle with Independent Power Turbine

Authors:

Volkan Ceylan | Arif Emre Özgür

Publisher:

Burdur Mehmet Akif Ersoy University

Main Topics:

Enerji

Journal:

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.15 Issue 2, pp.125-136

Document Type:

Article

Publication Date:

12/2024

Document Language:

Turkish

Document ID (Org No.):

2001335533

pISSN:

1309-2243

co2

turbine

cycle

analysisco2

türbin

çevrim

analiz

Issues

Article Details

Authors: Volkan Ceylan | Arif Emre Özgür

Publisher: Burdur Mehmet Akif Ersoy University

Main Topics: Enerji

Journal: Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.15 Issue 2, pp.125-136

Document Type: Article

Publication Date: 12/2024

Document Language: Turkish

Document ID (Org No.): 2001335533

pISSN: 1309-2243

Issues

Authors:

Volkan Ceylan | Arif Emre Özgür

Publisher:

Burdur Mehmet Akif Ersoy University

Main Topics:

Enerji

Journal:

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.15 Issue 2, pp.125-136

Document Type:

Article

Publication Date:

12/2024

Document Language:

Turkish

Document ID (Org No.):

2001335533

pISSN:

1309-2243