Journals / Mehmet Akif Ersoy Üniversitesi Uygulamalı Bilimler Dergisi / 2020 / Cilt: 4 - Sayı: 1

Energy Performance Assessment of CO2 Cascade Refrigeration Systems

Karbondioksitli Kaskad Soğutma Sistemlerinin Enerji Performans Değerlendirilmesi

Pages
22–32
Publication Date
2020-03-13
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

According to the results, the combination of “system 1” using R744/R717 refrigerants which having low GWP and high cooling performance has been determined more efficient than other examined cascade refrigeration systems.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, a comparison of the four different cascade systems using R744+R717/R1234ze/R134a/R152a refrigerant pairs has been presented.
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Key Findings & Data:The analysis has been performed for different evaporator temperatures ranged from -45 up to -20°C, and different condenser temperatures ranged from 30 up to 50°C.
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Conclusion & Impact:According to the results, the combination of “system 1” using R744/R717 refrigerants which having low GWP and high cooling performance has been determined more efficient than other examined cascade refrigeration systems.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Kaskad Soğutma · R744 · COP

Abstract

In this study, a comparison of the four different cascade systems using R744+R717/R1234ze/R134a/R152a refrigerant pairs has been presented. The analysis has been performed for different evaporator temperatures ranged from -45 up to -20°C, and different condenser temperatures ranged from 30 up to 50°C. When the evaporator temperature has been increased by 25°C, the system cooling performance (COPSYS) value has increased by about 60% to 64%, and the compressor work has decreased by about 38%. Increasing the condenser temperature by 20°C has resulted in a decrease in COPSYS of 29-34% and an increase in compressor work by about 38% to 50%. According to the results, the combination of “system 1” using R744/R717 refrigerants which having low GWP and high cooling performance has been determined more efficient than other examined cascade refrigeration systems.

Özet

Bu çalışmada, R744 + R717 / R1234ze / R134a / R152a soğutkanları kullanılan dört farklı kaskad sisteminin karşılaştırılması sunulmuştur. Analiz -45°C’den -20°C’ye değişen farklı evaporatör sıcaklıklarında ve 30°C’den 50°C’ye değişen farklı kondenser sıcaklıklarında gerçekleştirilmiştir. Evaporatör sıcaklığı 25°C arttırıldığında, tüm sistemin soğutma performansı (COPSYS) değeri yaklaşık %60 ila %64 arasında artmış ve kompresör gücü de yaklaşık %38 oranında azalmıştır. Kondenser sıcaklığının 20°C arttırılması, COPSYS'de %29 34 oranında bir azalmaya ve kompresör gücünde yaklaşık %38-50 oranında bir artışa neden olmuştur. Sonuçlara göre, düşük küresel ısınma potansiyeli (GWP) ve yüksek soğutma performansı değerine sahip olan R744/R717 soğutucu akışkanları kullanılan "sistem 1" kombinasyonunun, incelenen diğer kaskad soğutma sistemlerinden daha verimli olduğunu belirlenmiştir.

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Cite This Article

KOVACI, T. (2020). Energy Performance Assessment of CO2 Cascade Refrigeration Systems. Mehmet Akif Ersoy Üniversitesi Uygulamalı Bilimler Dergisi, Cilt: 4 - Sayı: 1, 22–32. https://ajindex.com/articles/788657

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