CO2/HFE7000 Kaskad Soğutma Çevriminin Enerji ve Ekserji Analizi

Bu çalışmada yeni bir akışkan türü olan HFE7000 soğutucu akışkanın kaskad soğutma çevriminde termodinamik yönden incelenmiştir. Karbondioksit/HFE7000 akışkanın kaskad soğutma sisteminde enerji (COP) ve ekserji verimleri araştırılmıştır. Bu anlamda, farklı parametrelerin COP, ekserji verimleri ve ekserji yıkım oranları üzerine etkisi incelenmiştir. Yapılan çalışmada; CO2 düşük sıcaklık bölgesinde HFE7000 akışkanı ise yüksek sıcaklık bölgesinde kullanılmıştır. Kaskad soğutma çevriminin soğutma uygulaması için genel COP ve ekserji verimleri 2.313 ve 0.5482 olarak hesaplanmıştır. Son kısımda, kaskad soğutma sistemlerinde yaygın olarak kullanılan R134a akışkanı ile kıyaslanmıştır.

Energy and Exergy Analyses of CO2/HFE7000 Cascade Cooling System

In this study, a new refrigerant HFE7000, has been investigated thermodynamically in the cascade cooling system. Energy (COP) and exergy efficiency of cascade cooling system with CO2/HFE7000 refrigerants are performed. In this regard, the impacts of various parameters on the COP and exergy efficiency and exergy destruction rate of CCS are studied. Moreover, the CO2 refrigerant is used in the low-temperature circuit and HFE7000 is used in the high-temperature circuit. The COP and exergy efficiency of cascade cooling system are found as 2.313 and 0.5482, for cooling application. In the last section, comparison with R134a refrigerant is done, which is widely used in cascade cooling system.

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