Hi, I am currently trying to fix up a plant that has had issues for a long period of time
my plate freezers are not performing as you would expect, I do not have allot of experience with plate freezers and not sure of there operating parameters so im going to give you what I know and hope the brains trust may be able to shed some light
suction is running at 75 KPA
liquid temp entering plates is -20c
suction temp leaving plates is -37c
liquid pump pressure is 250 kpa

I don't understand why my liquid temp entering is only -20c considering the low suction pressure thought it would relate more to what the PT chart states
and 17K TD on a plate freezer? would have thought this to be closer to 2K TD?

thanks in advance for your help if you need any more data I will be happy to provide if I can get it.
I am a bit at a loss here with how it should be running compared to how it actually is

thanks