Re: (Fwd) [EnergyPlus_Support] convection coefficients for vapour

["Richard J. Liesen" <rliesen@xxxxxxxxxxxxxxxxxxxx>]

Hello,
Yes, EnergyPlus calculates the inside and outside mass transfer 
coefficient hm, where hm is defined from the heat transfer convection 
coefficient using the Lewis Relation = 1.

Richard Liesen

Can you answer this part of the questions?

>"2) By calculating the moisture exchange with the construction
>(EMPDmodel or MTFmodel)can EP also take the internal and external
>surface resistance for vapour transfer (Zsi and Zse) into account? "
>
>
>------- Forwarded message follows -------
>To:                 EnergyPlus_Support@xxxxxxxxxxxxxxx
>From:               "marijke steeman" <marijkesteeman@xxxxxxxxxxx>
>Date sent:          Thu, 20 Oct 2005 12:37:41 -0000
>Subject:            [EnergyPlus_Support] convection coefficients for 
>vapour transfer
>Send reply to:      EnergyPlus_Support@xxxxxxxxxxxxxxx
>
>[ Double-click this line for list subscription options ]
>
>Hi to all.
>
>I have two questions:
>1) Is it possible to give an initial temperature and relative humidity
>to the indoor air and the constructions before starting the simulation?
>2) By calculating the moisture exchange with the construction
>(EMPDmodel or MTFmodel)can EP also take the internal and external
>surface resistance for vapour transfer (Zsi and Zse) into account? I
>saw for the heat transfer convection coefficients that EP calculates
>them hisself unless you explicitely give them values in EP. Does the
>same happens to the convection coefficients for vapour transfer?
>
>Thanks again for your good help !
>
>Kind regards, Marijke Steeman
>
>
>
>
>
>
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>------- End of forwarded message -------



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