Comparison of Annual Energy and Economy Savings by Decreasing The Evaporator Cooling Capacity of R12, R22, R134A, R404A Refrigerants

Abstract

R12, R22, R134A and R404A refrigerants are used for the single stage conventional vapor compression refrigeration cycle. Evaporator temperature was determined as 263K, condenser temperature 303K, mass flow rate 0.654(kg/s) compressor isentropic efficiency (0.7), compressor heat loss factor (0.7%), compressor inlet temperature 278K in 4 refrigerants. A comparison was made with the new value determined by reducing the evaporator cooling capacity (0.7%). The change in the compressor capacity and the changes in the cooling efficiency coefficient (COPSM) are given in the table. One year is taken as 8760 hours. The cost of 1kWh is set at $0.5 dollars. CoolPack program was used in the study. Annual savings for R12, R22, R134a and R404A gases were found to be 1051$, 1445$, 1358$ and 1183$, respectively. In addition, approximately 2102, 2891, 2716, 2365 kWh savings were achieved for R12, R22, R134a, R404A gases.

Keywords

• Refrigerants
• Cooling Cycle
• Energy
• Economy

R12, R22, R134A, R404A Soğutucu Gazlarının Evaporatör Performansının Belirli Bir Oranda Azaltılmasıyla Yıllık Enerji Ve Ekonomi Tasarrufu Kıyaslaması

Abstract

Tek kademeli geleneksel buhar sıkıştırmalı soğutma çevrimi için R12, R22, R134A ve R404A soğutucu gazları kullanılmıştır. 4 soğutucu gaz için evaporatör sıcaklığı 263K, kondenser sıcaklığı 303K, kütlesel debi 0,654(kg/s) kompresör izentropik verimliliği (0,7), kompresör ısı kaybı faktörü (%0,7), kompresör giriş sıcaklığı 278K olarak belirlenmiştir. Evaporatör soğutma kapasitesinin (%0,7) azaltılmasıyla belirlenen yeni değer ile bir karşılaştırma yapılmıştır. Kompresör kapasitesindeki değişim, soğutma etkinlik katsayısındaki (COPSM) değişimler tabloda verilmiştir. Bir yıl 8760 saat olarak alınmıştır. 1kWh’in maliyeti 0,5 $ dolar olarak belirlenmiştir. Yapılan çalışmada CoolPack programı kullanılmıştır. R12, R22, R134a ve R404A gazları için sırasıyla yıllık tasarruf para birimi olarak 1051$, 1445$, 1358$, 1183$ bulunmuştur. Ek olarak R12, R22, R134a, R404A gazları için yaklaşık olarak 2102, 2891, 2716, 2365 kWh tasarruf sağlanmıştır.

Keywords

• Soğutucu Gazlar
• Soğutma Çevrimi
• Enerji
• Ekonomi

References

1. Afshari, F., Comakli O., A thermodynamic comparison between heat pump and refrigeration device using several refrigerants. Energy and Buildings 2018; 168: 272-283.
2. Gao, E., Techno-economic and Environmental Analysis of Low-GWP Alternative Refrigerants in Cold Storage Unit under Year-round Working Conditions. International Journal of Refrigeration 2021.
3. Islam, M. A., Study on thermodynamic and environmental effects of vapor compression refrigeration system employing first to next-generation popular refrigerants. International Journal of Refrigeration 2021; 131: 568-580.
4. Park, W. Y., Ensuring the climate benefits of the Montreal Protocol: Global governance architecture for cooling efficiency and alternative refrigerants. Energy Research & Social Science 2021; 76: 102068.
5. Rangel-Hernández, V. H., Exergoeconomic performance comparison of R1234yf as a drop-in replacement for R134a in a domestic refrigerator. International Journal of Refrigeration 2019; 100: 113-123.
6. Subiantoro A., Ooi K. T., Economic analysis of the application of expanders in medium scale air-conditioners with conventional refrigerants, R1234yf and CO2. International Journal of Refrigeration 2013; 36(5): 1472-1482.
7. Wang, Y., Life cycle cost-benefit analysis of refrigerant replacement based on experience from a supermarket project. Energy 2019; 187: 115918.
8. Zhang, Y., Experimental investigation of the performance of an R1270/CO2 cascade refrigerant system. International Journal of Refrigeration 2020; 114: 175-180.

9. Zhu, Z., Thermal-economic-environmental analysis on household refrigerator using a variable displacement compressor and low-GWP refrigerants. International Journal of Refrigeration 2021; 123: 189-197.