Speed in evaporator tube

[Peter_1]

So you now need to work out the mass flow of each refrigerant/condition to meet your 2 KW, use PH chart, whilst looking at the chart look up the density of the refrigerant at the pipe exit conditions, then calculate as per DesA formular (maximum velocity/speed)
Or Just use Coolpack !!!!!!!

The condition of the gas constantly changes while the refrigerant flows from the beginning to the end of the pipe. So I think we just can't assume outlet nor inlet conditions to calculate speed in this line. It's somehow an mathematical expression that needs to be used.