The Analysis of Next-Generation Refrigerants in Terms of Energy, Exergy, and LCCP Perspective

Merve Özer; Mehmet Onur Karaagac; Alper Ergün; Mustafa Aktaş

Makale detayları

The Analysis of Next-Generation Refrigerants in Terms of Energy, Exergy, and LCCP Perspective

Yazarlar:

Merve Özer | Mehmet Onur Karaagac | Alper Ergün | Mustafa Aktaş

Yayıncı:

Duzce University

Ana Başlıklar:

Enerji

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.11 Issue 5, pp.2293-2308

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001307106

pISSN:

2148-2446

Anahtar kelimeler:

Özet:

 In this study, commonly used hydrofluorocarbon HFC-based refrigerants R404A and R410A, as well as hydrofluoroolefin HFO-based environmentally friendly next-generation refrigerant R1234yf with a low global warming potential GWP, were analyzed in terms of energy, exergy, and life cycle climate performance LCCP in refrigeration and air conditioning systems. All three refrigerants were examined at four different evaporation temperatures -30C, -15C, -5C, 0C with a constant condenser temperature of 50C using a simulation program. For different evaporation temperatures, the performance of the refrigerants was evaluated using the first and second laws of thermodynamics, and performance coefficients, exergy efficiency, and exergy destruction were calculated. Additionally, the amount of kgCO₂e equivalent was calculated using the LCCP method. In the study, it was found that the compressor energy consumption of R410A and R1234yf refrigerants was similar and approximately 7 lower than that of the R404A refrigerant. The highest coefficient of performance COP value was determined for R1234yf. It was observed that R1234yf refrigerant had the highest exergy efficiency starting from -15C. The kgCO₂e equivalent emission values calculated using the LCCP method revealed that R404A had the highest CO₂ emissions, while R1234yf had the lowest. Furthermore, based on the simulation study and theoretical calculations, it was determined that R410A and R1234yf refrigerants could be considered as alternative choices to R404A refrigerants in systems where two refrigerants are used.

 In this study, commonly used hydrofluorocarbon HFC-based refrigerants R404A and R410A, as well as hydrofluoroolefin HFO-based environmentally friendly next-generation refrigerant R1234yf with a low global warming potential GWP, were analyzed in terms of energy, exergy, and life cycle climate performance LCCP in refrigeration and air conditioning systems. All three refrigerants were examined at four different evaporation temperatures -30C, -15C, -5C, 0C with a constant condenser temperature of 50C using a simulation program. For different evaporation temperatures, the performance of the refrigerants was evaluated using the first and second laws of thermodynamics, and performance coefficients, exergy efficiency, and exergy destruction were calculated. Additionally, the amount of kgCO₂e equivalent was calculated using the LCCP method. In the study, it was found that the compressor energy consumption of R410A and R1234yf refrigerants was similar and approximately 7 lower than that of the R404A refrigerant. The highest coefficient of performance COP value was determined for R1234yf. It was observed that R1234yf refrigerant had the highest exergy efficiency starting from -15C. The kgCO₂e equivalent emission values calculated using the LCCP method revealed that R404A had the highest CO₂ emissions, while R1234yf had the lowest. Furthermore, based on the simulation study and theoretical calculations, it was determined that R410A and R1234yf refrigerants could be considered as alternative choices to R404A refrigerants in systems where two refrigerants are used.

 In this study, commonly used hydrofluorocarbon HFC-based refrigerants R404A and R410A, as well as hydrofluoroolefin HFO-based environmentally friendly next-generation refrigerant R1234yf with a low global warming potential GWP, were analyzed in terms of energy, exergy, and life cycle climate performance LCCP in refrigeration and air conditioning systems. All three refrigerants were examined at four different evaporation temperatures -30C, -15C, -5C, 0C with a constant condenser temperature of 50C using a simulation program. For different evaporation temperatures, the performance of the refrigerants was evaluated using the first and second laws of thermodynamics, and performance coefficients, exergy efficiency, and exergy destruction were calculated. Additionally, the amount of kgCO₂e equivalent was calculated using the LCCP method. In the study, it was found that the compressor energy consumption of R410A and R1234yf refrigerants was similar and approximately 7 lower than that of the R404A refrigerant. The highest coefficient of performance COP value was determined for R1234yf. It was observed that R1234yf refrigerant had the highest exergy efficiency starting from -15C. The kgCO₂e equivalent emission values calculated using the LCCP method revealed that R404A had the highest CO₂ emissions, while R1234yf had the lowest. Furthermore, based on the simulation study and theoretical calculations, it was determined that R410A and R1234yf refrigerants could be considered as alternative choices to R404A refrigerants in systems where two refrigerants are used.

 Bu çalışmada, soğutma ve iklimlendirme sistemlerinde yaygın olarak kullanılan hidroflorokarbon HFC tabanlı R404A, R410A akışkanları ile hidrofloroolefein HFO tabanlı düşük küresel ısınma potansiyel oranına sahip ve ozon tabasına dost yeni nesil soğutucu akışkan olan R1234yf enerji, ekserji ve yaşam döngüsü iklim performansı LCCP açısından incelenmiştir. Her üç soğutucu akışkan dört farklı buharlaşma sıcaklığı -30C, -15C, -5C, 0C ile sabit kondenser sıcaklığında 50C simülasyon programı kullanılarak gerçekleştirilmiştir. Farklı buharlaşma sıcaklıkları için, soğutucu akışkanların performansları termodinamiğin birinci ve ikinci kanunu kullanılarak değerlendirilmiş ve sistemlere ait performans katsayıları, ekserji verimi, ekserji yıkımı hesaplanmış, LCCP yöntemiyle de kgCO₂eşd. miktarı hesaplanmıştır. Çalışmanın sonunda R410A ve R1234yf soğutucu akışkanlarının kompresör enerji tüketimlerinin birbirine yakın ve R404A soğutucu akışkanına göre yaklaşık 7 daha düşük olduğu tespit edilirken en yüksek COP değeri R1234yf olarak belirlenmiştir. R1234yf soğutucu akışkanın -15Cden itibaren en yüksek ekserji verimine sahip olduğu görülmüştür. LCCP yöntemi ile hesaplanan kgCO₂eşd. emisyon değerlerinde CO₂ emisyonu yüksek olan soğutucu akışkanın R404A, en düşüğün ise R1234yf olduğu tespit edilmiştir. Ayrıca yapılan simülasyon çalışması ve teorik hesaplamalar sonucunda ele alınan soğutucu akışkanlardan R404A soğutucu akışkanı yerine R410A ve R1234yf soğutucu akışkanlarının kullanılması iki soğutucu akışkanın kullanıldığı sistemlerde alternatif olarak kullanılabilir olduğu tespit edilmiştir.

Makale detayları

The Analysis of Next-Generation Refrigerants in Terms of Energy, Exergy, and LCCP Perspective

Yazarlar:

Merve Özer | Mehmet Onur Karaagac | Alper Ergün | Mustafa Aktaş

Yayıncı:

Duzce University

Ana Başlıklar:

Enerji

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.11 Issue 5, pp.2293-2308

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001307106

pISSN:

2148-2446

Energy

Exergy

GWP

LCCP

RefrigerantEnerji

Ekserji

GWP

LCCP

Soğutucu Akışkan

Sayı

Makale detayları

Yazarlar: Merve Özer | Mehmet Onur Karaagac | Alper Ergün | Mustafa Aktaş

Yayıncı: Duzce University

Ana Başlıklar: Enerji

Dergi: Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.11 Issue 5, pp.2293-2308

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001307106

pISSN: 2148-2446

Sayı

Yazarlar:

Merve Özer | Mehmet Onur Karaagac | Alper Ergün | Mustafa Aktaş

Yayıncı:

Duzce University

Ana Başlıklar:

Enerji

Dergi:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.11 Issue 5, pp.2293-2308

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001307106

pISSN:

2148-2446