Exergetic Performance Analysis of HFO Based Refrigerants (R452A, R454C, R455A )

Öz

GWP (Global Warming Potential) and ODP (Ozone Depletion Potential) occupy an important place in global warming. This has led to the use of refrigerants with low GWP and ODP in cooling systems. Commonly used in cooling systems, R404A refrigerant has a very high GWP value despite having zero ODP. In this study, the exergetic performance analyses of the refrigerants, which may be alternative to R404A, in a theoretical cooling cycle were given comparatively. As an alternative to R404A refrigerant, R452A, R455A and R454C fluids are examined comparatively. COP and exergy destruction, for each refrigerant were examined separately and results were graphically analyzed. COP values of HFO group refrigerants were found as 2.472, 2.312, 2.632, 2.309 for R404A, R452A, R455A and R454C, respectively. In terms of exergy efficiency of HFO group refrigerants were found as 41.5%, 38.8%, 43.9%, 38.7% for R404A, R452A, R455A and R454C, respectively. As a result, thermodynamic properties, GWP and ODP values, energetic and external perspective; As an alternative to the R404A fluid, the best fluid selected is R455A, then R452A and R454C, respectively. The best choice for these alternative refrigerants in cooling systems is R455A.

Anahtar Kelimeler

• Refrigerants
• COP
• R452A
• R454C
• R455A
• HFO(Hydrofluoroolefin)

HFO Bazlı Soğutucu Akışkanların Ekserjetik Performans Analizi

Öz

GWP ve ODP, küresel ısınmada önemli bir yer tutmaktadır. Bu, soğutma sistemlerinde düşük GWP ve ODP'ye sahip soğutucuların kullanılmasına yol açmıştır. Yaygın olarak soğutma sistemlerinde kullanılan R404A soğutucu, sıfır ODP'ye sahip olmasına rağmen çok yüksek bir GWP değerine sahiptir. Bu çalışmada teorik bir soğutma çevriminde R404A'ya alternatif olabilecek soğutucu akışkanların ekzerjetik performans analizleri karşılaştırmalı olarak verilmiştir. R404A soğutucu akışkanına alternatif olarak R452A, R455A ve R454C akışkanları karşılaştırmalı olarak incelenir. Her bir soğutucu için COP ve ekserji yıkımı ayrı ayrı incelendi ve sonuçlar grafiksel olarak analiz edildi. HFO grubu soğutucuların COP değerleri R404A, R452A, R455A ve R454C için sırasıyla 2.472, 2.312, 2.632, 2.309 olarak bulundu. HFO grubu soğutucu akışkanların ekserji verimi açısından sırasıyla; R404A, R452A, R455A ve R454C için sırasıyla% 41,5,% 38,8,% 43,9,% 38,7 olarak bulunmuştur. Sonuç olarak termodinamik özellikler, GWP ve ODP değerleri, enerjik ve dış bakış açısı; R404A sıvısına alternatif olarak, seçilen en iyi sıvı sırasıyla R455A, ardından R452A ve R454C'dir. Soğutma sistemlerindeki bu alternatif akışkanlar için en iyi seçim R455A'dır.

Anahtar Kelimeler

• Soğutucu Akışkanlar
• COP
• R452A
• R454C
• R455A
• HFO(Hidrofloroolefin)

Kaynakça

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