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[EnergyPlus_Support] Re: Easy question - Very thick massive external floor
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- Subject: [EnergyPlus_Support] Re: Easy question - Very thick massive external floor
- From: "Jean marais" <jeannieboef@xxxxxxxxx>
- Date: Wed, 07 Dec 2011 18:12:22 -0000
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- Delivery-date: Wed, 07 Dec 2011 11:12:25 -0700
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Comming back to the composite wall concept. One could quite easily create a composite equivalent consisting of 3 layers, with an equivalent heat tranfer resistance and thermal capacitance, but I don't think it's the many layers that result in problems, I think it is the high thermal capacitance of a construction that thick.
If I'm right then the only way to battle the problem is to slice the construction at some point (say midway) and apply a constant (or varying) temperature at this point using the otherside coefficients. That would be difficalt to calculate. I could use the internal source object (since I have it anyway) to report the surface temperature at a given layer over the year. From this I could get a average temperature (or variable) and calculate what otherside coeff would be needed to achieve this. I would then cap off the contruction at this layer and apply the otherside coeff here.
What do you think?
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