Hi! For our class project, we have to design a system that freezes an amount of water as quick as possible. The refrigerant is R134a. The compressor is known. I don't really know how to get started here. How do I choose the evaporator pressure and the superheating, and equally the condensor pressure and subcooling? We have to use a capillar instead of expansion valve, with given characteristics to find the mass flow rate at a given capillar length/diameter. Is there someone here who can be a quick guide or who knows any usefull design software? Thanks a lot!