Cooling Load Calculation for Dough Passing Through Rollers

[plucker_08]

I have a dough passing through a pair of rollers equipped with internal circulating chilled water.

given: mass flow rate, specific heat and temp in/out of the product
diameter of the rollers, its material.
temp. in of the chilled water.

problem: cooling load needed for the chiller.

 

[plucker_08]

is the equation right?

Qwater = Qconduction + Qdough + Qloss

 

[russ_watters]

You didn't mention a flow rate for the water, so I'll assume you don't have it... But it is the same for the dough as it would be for the water: mass flow times specific heat times delta-T.

Figuring out if there is loss and how much would be difficult, though...

 

[plucker_08]

I guess I'll just adjust the water's flow rate and discharge temperature. the main problem here is the cooling load.

 

[plucker_08]

is there any software that can simulate this?

 

[russ_watters]

Not really, the heat transfer of dough doesn't seem like a very common application.

Is this machine custom manufactured? Does the vendor have such information?

I guess I'll just adjust the water's flow rate and discharge temperature.

If you do a few trials, you'll have enough information to construct your own model.

 

[plucker_08]

i mean, i can model it as a slab passing through a pair of rollers factoring in its specific heat, etc.

 

[plucker_08]

uppers