Theoretical energy performance evaluation of different single stage vapour compression refrigeration configurations using R1234yf and R1234ze(E) as working fluids |
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| Affiliation: | 1. ISTENER Research Group, Department of Mechanical Engineering and Construction, Campus de Riu Sec s/n, University Jaume I, E12071 Castellón, Spain;2. Departamento de Ingeniería Química y Nuclear, Universidad Politécnica de Valencia, Camino de Vera 14, Valencia, Spain;1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, China;2. Research Center on the Technology and Equipments for Energy Saving in Thermal Energy System, Ministry of Education, Zhengzhou 450001, Henan, China;1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), MOE, No.92 Weijin Road, 300072, Tianjin, PR China;2. School of Chemical Science & Engineering, KTH Royal Institute of Technology, SE-10044, Stockholm, Sweden;3. University of Stavanger, 4036, Stavanger, Norway;1. Área de Máquinas y Motores Térmicos, Escuela de Ingeniería Industrial, University of Vigo, Campus Lagoas-Marcosende 9, 36310 Vigo, Spain;2. Department of Energetics, Mechanical Engineering Faculty in Slavonski Brod, University of Osijek, Trg Ivane Brlić-Mažuranić 2, 35000 Slavonski Brod, Croatia;1. CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. College of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China |
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| Abstract: | R1234yf and R1234ze(E) have been proposed as alternatives for R134a in order to work with low GWP refrigerants, but this replacement results generally in a decrease of the performance. For this reason, it is interesting to explore ways to improve the system performance using these refrigerants. In this paper, a comparative study in terms of energy performance of different single stage vapour compression configurations using R1234yf and R1234ze(E) as working fluids has been carried out. The most efficient configuration is the one which uses an expander or an ejector as expansion device. On the other hand, using an internal heat exchanger in a cycle which replaces the expansion valve by an expander or an ejector could produce a detrimental effect on the COP. However, for all the configurations the introduction of an internal heat exchanger produces a significant increment on the cooling capacity. |
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| Keywords: | Single stage Refrigeration R1234yf R1234ze(E) Energy efficiency Système mono-étagé Réfrigération R1234yf R1234ze(E) Efficacité énergétique |
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