The experimental investigation of performances of R134a and refrigerants mixtures based hydrocarbons

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Thesis Type: Postgraduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2013

Student: HALİT KAÇMAZ

Supervisor: TAYFUN MENLİK

Abstract:

In this study, R134a/R290 mixtures which have various mass ratio (% 50-50, 60-40, 70-30, 80-20, 90-10) and a mix gas having different composition were used in water source heat pump compliant with R134a. The composition of the mix gas is R290-R600-R600a-R1270-R170 and the mass ratio of component gases are %44,7-45,6-9-0,35-0,35. The experiments are performed for 3 fan flow rates and 3 cooling water flow rates. The mix gas was prepared in 97,7% (mol/mol) rate of purity in accordance with TSE 6124 EN 27941 in AYGAZ CORPORATION. REFPROP 7,0 was used for the thermodynamics properties of R134a/R290 mixtures. The gas mixtures were analyzed according to the first and the second law of thermodynamics. The highest COP was obtained for R134a in the results of the experiments. The COP of R134a/R290 mixtures were equal to R134a. The exergy losses of R134a/HC are higher than R134a. As a result of the experimental study, R134a has a better performance than R134a/R290 mixtures and mix gas in the first and the second law analyses