Artık Gaz Kesri ve Kurs Oranının Tersinmez Otto Çevriminin Performansına ve Entropi Üretimine Etkileri

Sonlu zaman termodinamiği, ısı motorlarının performansının gerçekçi olarak analizinde sıklıkla kullanılmaktadır. Bu çalışmadatersinmez Otto çevrimi için ısı transferi, sürtünme gibi kayıplar da dikkate alınarak artık gaz kesri ve kurs oranın motor performansınave entropi üretimine etkileri incelenmiştir. Sonuç olarak artık gaz kesrinin artmasıyla birlikte çevrim başlangıç sıcaklığı ve fren özgülyakıt tüketimi artarken, maksimum çevrim sıcaklığı, efektif güç, ısıl verim ve entropi üretiminin azaldığı, kurs oranının artmasıylabirlikte ise fren özgül yakıt tüketimi ve entropi üretiminin arttığı, efektif güç ve ısıl verimin azaldığı görülmüştür.

Effects of residual gas fraction and stroke ratio on the performance and entropy generation of an irreversible Otto cycle

Finite-time thermodynamics is often used in realistic analysis of the performance of heat engines. In this study, the effects of residual gas fraction and stroke ratio on engine performance and entropy generation were investigated by taking into consideration the losses such as heat transfer and friction for irreversible Otto cycle. As a result, with the increase of the residual gas fraction, the initial cycle temperature and brake specific fuel consumption increase while the maximum cycle temperature, effective power, thermal efficiency and entropy generation decrease, with the increase of the stroke ratio, the brake specific fuel consumption and entropy generatin increases. Burdur Mehmet Akif Ersoy Üniversitesi, BEGTBMYO, Bucak-Burdur-Türkiye

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