Cooling Load Calculation for Dough Passing Through Rollers

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Discussion Overview

The discussion revolves around calculating the cooling load required for a chiller used in a dough processing system, specifically focusing on the heat transfer involved as the dough passes through rollers with internal chilled water circulation. The scope includes theoretical calculations and potential modeling approaches.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant presents a formula for the cooling load, suggesting it includes components for conduction, dough heat absorption, and losses.
  • Another participant questions the completeness of the information, noting the absence of water flow rate and suggesting it should be similar to that of the dough.
  • A participant indicates that determining heat loss could be complex and may require adjustments to the water's flow rate and discharge temperature.
  • There is a query about software availability for simulating the cooling load calculation, with a response indicating that such applications may not be common for dough heat transfer.
  • One participant suggests modeling the dough as a slab to account for its specific heat and other factors.

Areas of Agreement / Disagreement

Participants express varying levels of uncertainty regarding the completeness of the information provided, particularly concerning flow rates and heat loss. There is no consensus on the best approach to calculate the cooling load or the adequacy of existing software tools for simulation.

Contextual Notes

Participants note limitations in the available data, such as the lack of water flow rate and potential complexities in calculating heat loss. The discussion reflects a reliance on assumptions that may not be fully defined.

Who May Find This Useful

This discussion may be of interest to engineers and technicians involved in food processing, particularly those working with thermal management in dough processing systems.

plucker_08
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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.
 
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is the equation right?

Qwater = Qconduction + Qdough + Qloss
 
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...
 
I guess I'll just adjust the water's flow rate and discharge temperature. the main problem here is the cooling load.
 
is there any software that can simulate this?
 
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.
 
i mean, i can model it as a slab passing through a pair of rollers factoring in its specific heat, etc.
 
uppers
 

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