Viscosity measurements of six binary mixtures R32+R1234yf and R32+R1243zf at different compositions were conducted in the homogenous liquid gas phases with a vibrating-wire viscometer temperature range from (254 to 383) K pressures (1 8) MPa. The measurement system was verified pure carbon dioxide R32 phases. relative combined expanded uncertainties (k = 2) experimental viscosity are generally ...

In presented work, researchers have used efficiency defect as a tool for checking the utility of different refrigerants in Vapour compression refrigeration system. A mathematical model simple system is created. Using first law analysis and exergy calculated various components individually whole vapour well. It found that R1234yf has highest value system, whereas R134a least Variation with evapo...

ORC technology is one of the most promising technologies for use residual energy in generation electrical energy, offering simple and environmentally friendly alternatives. In this field, selection working fluids plays an important role operation cycle, whether terms efficiency or minimization environmental impacts. Therefore, paper, a comprehensive review presented on R1234yf refrigerant its m...

The characteristics of local heat transfer and pressure drop were investigated experimentally for the vertical up-flow boiling of refrigerant R1234yf in two types of aluminum multi-port extruded tubes having 16 channels with a crosssection of 0.91 × 0.21 mm (tube A) and 40 channels with a cross-section of 0.34 × 0.21 mm (tube B). At an evaporating temperature of 15 °C, the local heat transfer c...