Dairy pasteurizer

[Christophe Dupriez]

Hello! I am modeling a dairy (raw milk, raw cream) pasteurizer (a rather common application) and I do not find those substances pre-defined in CoolProp. I see someone intended in 2019. Does anyone have a basis for this? After experimentation (and field validation) I suppose this data could be added as a JSON file to the project ? Thanks for your help ! Christophe (Our project: https://www.akuino.net/pasteurizer )

[Matthis Thorade]

Hi,

I believe I have seen a Helmholtz energy equation of state for various foods and liquids in the past, but I cannot find it anymore. You would need either a lot of experimetnal data, or find a publication similar to this one:

https://www.researchgate.net/publication/288156311_Predicting_the_properties_of_industrial_sugar_juice_using_Peng-Robinson_Equation_of_State

But ideally for milk in varying composition, and as Helmholtz, not Peng-Robinson (even though CoolProp can handle Peng-Robinson type equation of state, to my understanding).

[Matthis Thorade]

Maybe search for C-H-O-N-S also?
https://doi.org/10.1016/0016-7037(92)90157-E

[Christophe Dupriez]

Many thanks for you effort !

A pasteurizer (not a sterilizer a.k. UHT milk) is only 72°C at a pressure big enough to make the milk advances in the pipes (less than 3 bars).

The flow must be turbulent to be efficient in a counterflow heat exchanger.

I hoped somebody had done the job but I will manage (starting with Water as a reference).

Have a nice week-end!