Heat Transfer Dynamic Model
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Posted by: applegat ®

02/25/2007, 22:50:37

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I am working on a project dealing with the dynamic effects of heating and cooling (of the coolant) in an automotive type cooling sytem. I want to start out with a very simple and general model, then improve the equation(s) to include more parameters. For my simple model, I want to include a variable heat source, then be able to calculate coolant temp over time. Assuming 100% heat transfer from the heat source to the coolant and assuming no external cooling of the coolant. The coefficient of heat transfer can be a generic number. I plan to adjust this in future models. Can anyone provide suggestions on how to setup this model?

Thanks.








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Re: Heat Transfer Dynamic Model
Re: Heat Transfer Dynamic Model -- applegat Post Reply Top of thread Forum
Posted by: zekeman ®

02/27/2007, 15:26:18

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Without dissipating the heat you have no model. You must be able to cool down the coolant at a minimum.







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Re: Re: Heat Transfer Dynamic Model
Re: Re: Heat Transfer Dynamic Model -- zekeman Post Reply Top of thread Forum
Posted by: Bruiser ®

02/28/2007, 09:57:54

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Zoom in!! Cooling the coolant is the reverse of cooling whatever the coolant is cooling. I mentioned this in terms of a radiator, device used to transfer heat from hot liquid to surrounding air (or other liquid).

You can dissipate heat by raising the temperature of a coolant.








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Re: Heat Transfer Dynamic Model -- applegat Post Reply Top of thread Forum
Posted by: Bruiser ®

02/27/2007, 10:38:49

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Keep it simple. Q = mcT, where:
Q = input heat (Joules)
m = mass of coolant
T = change in temperature
c = specific heat (I think water is 1, google it)

Whatever dynamic principles you expand on will incorporate this basis. The same goes for a radiator for example, but the Q acts on the mass of air around it, raising its temperature.








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