hello, I have a problem with simulating the refrigerating cycle for the freezer (typical one, internal volume of 300 litres, doors open at the top). Reciprocating compressor- condenser- capillary tube - evaporator - compressor (very simple cycle).
There is, as usually in small freezers heat exchanger (capillary is instaled in the suction pipe). Heat exchanger effects the temperature of superheated vapour (temp of evaporation=-40degC,and 15degC at the suction of the compressor). The process is isobaric (as I asume), so there's a change in enthaply (delta h).
Does it mean that expansion process in capillary tube isn't isenthapic?
Can anybody help me with this? I'm stuct and can't go any further.... and I need to calculate this right:)