REJENERATÖRLÜ MENZİL ARTTIRICI MİKRO GAZ TÜRBİNİ MODELLENMESİ VE PERFORMANS SİMÜLASYONU

Öz

Elektrikli araçların (EA) menzil sınırlamalarını aşmak amacıyla kullanılan mikro gaz türbinli (MGT) menzil arttırıcılar yüksek güç-ağırlık oranı, kompakt yapı, yakıt esnekliği ve bakım maliyeti avantajları ile öne çıkmaktadır. Bu çalışmada, menzil uzatıcı olarak tasarlanan basit ve rejenerasyonlu Brayton çevrimlerinin termodinamik performansı ve CO2 emisyonları incelenmiştir. Çevrimlerin dinamik sistem tepkilerini değerlendirmek üzere kapalı döngü PID (Oransal-İntegral-Türev) kontrol algoritmaları kullanılarak Simcenter Amesim ortamında metan yakıtlı mikro gaz türbinleri 1-Boyutlu olarak modellenmiştir. Simülasyonlar, 30 000 ila 100 000 d/dk geniş bir şaft hızı aralığında, farklı türbin giriş sıcaklıklarında (TGS: 100K, 1100K ve 1275 K) ve rejenerasyonlu çevrim için ise 0.85'lik reküperatör etkenlik değerleri kullanılarak gerçekleştirilmiştir. Simülasyon sonuçları, basit çevrime reküperatör eklentisinin termal verimi, 1275 K TGS değerinde %23.6’den %35 seviyelerine çıkardığını göstermiştir. Modellenen rejenerasyonlu mikro gaz türbininde, 1275 K TGS ve 90 000 d/dk çalışma şartlarında, 146.14 kW net güç, 205 g/kWh'lik minimum özgül yakıt tüketimi (ÖYT) ve 562.31 g/kWh özgül CO2 emisyon salınım değerlerine ulaşılmıştır. Yapılan bu çalışma, rejenerasyonlu mikro gaz türbinlerinin düşük çevresel etkisiyle birlikte, verimli bir menzil arttırıcı olduğunu göstermiştir

Anahtar Kelimeler

• Mikro gaz türbini
• Menzil arttırıcılı elektrikli araçlar
• Simcenter Amesim
• Rejeneratör
• Brayton çevrimi

Teşekkür

Çalışma kapsamındaki simülasyonlar Simcenter Amesim kullanılarak gerçekleştirmiştir. Yazar, Simcenter Amesim yazılımının akademik lisansını sağlayan DTA mühendislik firmasına teşekkürlerini sunmaktadır.

Modeling and Performance Simulation of a Regenerative Range-Extender Micro Gas Turbine

Öz

The Micro gas turbine (MGT) range extenders, used to overcome the range limitations of electric vehicles (EVs), stand out for their high power-to-weight ratio, compact design, fuel flexibility, and low maintenance costs. In this study, the thermodynamic performance and CO2 emissions of simple and regenerative Brayton cycles designed as range extenders were investigated. Methane-fueled micro gas turbines were modeled in 1-D using Simcenter Amesim, employing closed-loop PID (Proportional-Integral-Derivative) control algorithms to evaluate the dynamic system responses of the cycles. Simulations were conducted over a wide shaft speed range of 30 000 to 100 000 rpm, at different turbine inlet temperatures (TIT: 100 K, 1100 K, and 1275 K), and using a recuperator effectiveness value of 0.85 for the regenerative cycle. The simulation results showed that adding a recuperator to the simple cycle increased thermal efficiency from 23.6% to 35% at a TGS of 1275 K. In the modeled regenerative micro gas turbine, under operating conditions of 1275 K TIT and 90 000 rpm, a net power of 146.14 kW, a minimum specific fuel consumption (SFC) of 205 g/kWh, and specific CO2 emission values of 562.31 g/kWh were achieved. This study has demonstrated that regenerative micro gas turbines serve as an efficient range extender while having a low environmental impact.

Anahtar Kelimeler

• Micro gas turbine
• Range extender electric vehicles
• Simcenter Amesim
• Recuperator
• Brayton cycle

Teşekkür

The simulations conducted as part of this study were performed using Simcenter Amesim. The author would like to thank DTA Engineering for providing an academic license for the Simcenter Amesim software.

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