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Re: [EnergyPlus_Support] Definition
You definitions are correct except for Q. Q is not a single value
across the entire wall. Q_in and Q_out can be different due to
thermal storage in the middle of the wall. In fact, Q_in and Q_out
can be in opposite directions under certain conditions. For example,
a south-facing wall is heated by the sun and the temperature in the
center of the wall starts to rise. Then the sun moves so that the
wall is now shaded. The outside of the wall will begin to cool while
the center of the wall is still hot. At this time, heat is flowing
in two directions away from the hot center.
_out _in
: :
: :
outside : : inside
: :
: :
Q_out <--> :
: :
: Q_storage
: :
: <--> Q_in
: :
: :
wall
On 12 Dec 2002, at 6:22, gagamere gagamere@xxxxxxxxxxx wrote:
> i wondered about the definition of Variable name in Report.
>
> _out _in
> : :
> : :
> outside : : inside
> : :
> : :
> ---------> Q
> : :
> : :
> : :
> wall
>
> Zone,Average,Surface Inside Temperature[C] = T_in
> Zone,Average,Surface Outside Temperature[C] = T_out
> Zone,Average,Surface Int Convection Coeff[W/m2-K] = h_in
> Zone,Average,Surface Ext Convection Coeff[W/m2-K] = h_out
> Zone,Average,Opaque Surface Inside Face Conduction[W]
> = Q(Heat transfer rate in wall)
>
> Thank you very much on advance.
>
>
>
>
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