Capillary tube and variable speed compressors

Hi guys,

I am wondering if someone can give me some figures for what to expect from a capillary tube when being operated at different compressor speeds, in terms of what theoretically should happen.

I know evaporator temperatures and head pressure should go down, but I am not sure what happens on the evaporator side. Do the temperatures there change?

I'm primarily interested in increasing COP for a given power consumption at part load.

Thanks