R134a Refrigerant T S Diagram. Typical freezing temperatures of 26c in the evaporator can be implemented with pressures around 1bar while for condensing only a pressure of 17bar at 60c is required. P h chart for r134a si units syracuse university 28 05 2018 r134a has relatively low pressure and therefore about 50 larger compressor displacement is required when compared to r22.
Figure 2 depicts. Hfc 134a pressure enthalpy diagram si units. 100 c 39 bar.
May 25 2019 by alec johnson.
It can be seen from the t s diagram that without subcooling the throtling loss is equal to the hatched are b 4 4 c whereas with subcooling the throttling loss is given by the area a 4 4 b. The diagram shows the steam pressure curve of the well suited fc r134a. Calculation of thermodynamic state variables of tetrafluorethan r134a in saturation state boiling curve. R134a has a global warming potential gwp of 1300 with respect to carbon dioxide.