I'm doing a project and looking for some advice on how to choose which refrigerant to use.

I'm designing a vapour compression refrigeration cycle which needs to remove 323kW of heat energy in the evaporator. At this stage, the refrigerant will need to be at around -5C as I am cooling to 5C.

In the condenser I will probably be cooling the refrigerant using air at a maximum temperature of 45C.

Can anyone give me some advice on what refrigerant to use? I know it depends somewhat on the compressor and pressure used but as these depend on refrigerant it's very hard to choose!

After reading about it online i've been considering R22 and R134a

Thanks