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Çok Kademeli Buhar Sıkıştırmalı İdeal Soğutma Çevrimlerinde Farklı Soğutucu Akışkanlar Kullanarak Enerji ve Ekserji Analizi
2021
Journal:  
Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi
Author:  
Abstract:

Çok kademeli buhar sıkıştırmalı soğutma çevrimleri, düşük sıcaklık uygulamalarında kullanılmasının yanı sıra, sıcaklık farkının yüksek olduğu soğutma uygulamalarında da tercih edilmektedir. Son yıllarda çevresel faktörlerin daha fazla önem kazanması ile birlikte alternatif soğutucu akışkanlar kullanımı araştırılmaktadır. Soğutma çevrimlerinde enerji tasarrufunu araştırmanın ve sağlamanın yolu her ne kadar kompresör işini minimuma indirmek gibi görünse de, birim soğutma için gerekli minimum gücü verdiği için Performans Katsayısını (COP) optimize etme üzerinde çalışmak daha cazip gelmektedir. Bu çalışmada, iki kademeli buhar sıkıştırmalı ideal bir soğutma çevriminde kullanılması durumunda farklı soğutucu akışkanların performansları parametrik olarak incelenerek mukayeseleri yapılmıştır. Buharlaşma ve yoğuşma sıcaklıklarının değişimi ile her bir akışkan için sistemin ayrı ayrı COP değerleri hesaplanmıştır. Ayrıca sistemin kompresör işi ve soğutma yüklerinin değişimleri de sunulmuştur. Sistemde en yüksek COP değeri, 6.593 ile soğutucu akışkan R600 kullanılması durumunda 5 °C buharlaşma sıcaklığında elde edilirken, en düşük değer 3.311 ile 50 °C yoğuşma sıcaklığında R227ea kullanılması durumunda elde edilmiştir.

Keywords:

Multi-step steam compressor ideal cooling environments using different cooling fluids for energy and exergy analysis
2021
Author:  
Abstract:

Multi-stage steam-compressed cooling circuits are preferred in low-temperature applications as well as in cooling applications where the temperature difference is high. In recent years, with the increased importance of environmental factors, the use of alternative cooling fluids is being researched. Although the way to research and provide energy savings in cooling circuits seems to minimize the compressor work, it is more attractive to work on optimizing the performance ratio (COP) because the unit provides the minimum power required for cooling. In this study, comparisons were made by parametric examination of the performance of different cooling fluids in the case of two-step steam steam compressor being used in an ideal cooling circle. With the variation of steam and concentration temperatures, the separate COP values of the system for each liquid is calculated. There are also changes in the system's compressor work and cooling loads. The highest COP value in the system is achieved at 5 °C in the case of the use of the cooling fluid R600 with 6.593 while the lowest value is achieved in the case of the use of R227ea at 3.311 to 50 °C in the case of the use of the concentration temperature.

Keywords:

Energetic and Exergetic Analysis Of A Multistage Vapor Compression Refrigeration System With Various Refrigerants
2021
Author:  
Abstract:

Multi-stage vapor compression refrigeration cycles are used in low temperature applications, as well as in refrigeration applications where temperature difference is high. In recent years, as environmental factors have gained more importance, the use of alternative refrigerants has been investigated. Although the way to research and achieve energy savings in refrigeration cycles seems to be minimizing compressor work, it is more attractive to work on optimizing the Coefficient of Performance (COP) as it gives the minimum power required for unit cooling. In this study, the performances of different refrigerants when used in an ideal two-stage vapor compression refrigeration cycle are analyzed parametrically and compared. Separate COP values of the system were calculated for each refrigerant by changing the evaporation and condensation temperatures. In addition, the compressor work and the changes of the cooling loads of the system are also presented. The highest COP value in the system was obtained at 5 °C evaporation temperature in case of using the refrigerant R600 with 6.593, while the lowest value was obtained as 3.311 when R227ea was used at 50 °C condensation temperature.

Keywords:

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Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

Field :   Fen Bilimleri ve Matematik; Mühendislik

Journal Type :   Ulusal

Metrics
Article : 528
Cite : 660
2023 Impact : 0.174
Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi