I'm designing a simple copper coil wort chiller. Digging formulas I'm having hard time to figure some things out, perhaps some simple guides may help me to go the right direction:
LMTD need inlet and outlet temperatures differentials. On Time = 0 this can be for the inlet the initial refrigerant temperature and wort initial temperature. But what about then $T$ = 5 mins? And Outlet temperature? How do I even calculate it on $T = 0$? I bet this is related to the refrigerant flow inside the tubing, but can't find any paper to help me out.
Wort Reynolds number. How the flow turbulence helps to improve the $U$-Number? Is there a way to calculate it (related to RPMs?) or I just use empirical numbers from tables?