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Re: [EnergyPlus_Support] Passive gains breakdown - which variables?
Hello Marcus
I would suggest you check also indirect solar gains through windows. From my experience they are significant in cooling dominated climates. Even in heating dominated climates, during their hot season depending on the insulation of the building they can be significant.
I would also check the effects of radiant heat on roof and wall, by choosing lower absorptivities AND shading walls.
You can use zone window solar gain for solar gains through windows but I would suggest you check window heat balance for a fine tune of the envelope.
district cooling does not gauge heat gains.
Migue
Citando Marcus <clasz14@xxxxxxxxx>:
> I need to analyze the passive performance of a building in a cooling
> dominated climate. I need to meter the following passive heat gains:
>
> - Conduction through the envelope
> - Direct solar gain through windows
> - Infiltration gain
> - Total heat gain (to check the sum of these three)
>
> So far I've used the following approach, metering these variables:
>
> - Conduction through the envelope
> . ???
> - Direct solar gain through windows
> . Zone Transmitted Solar Energy (??)
> - Infiltration gain
> . Zone infiltration total heat gain
> - Total heat gain
> . Cooling:DistrictCooling ??
>
> This isn't producing quite what I expect - can someone direct me to
> more appropriate variables? Especially the conduction gain? Am I
> missing something?
>
> Cheers,
>
> Marcus
>
>
Miguel Pacheco
Doutorando / Graduate Student
Laboratório de Eficiência Energética em Edificações - LabEEE
Universidade Federal de Santa Catarina - UFSC
http://www.labeee.ufsc.br
Contato/Contact:
Florianópolis: 55 48 3721 5184 / 55 48 3721 5185
São Paulo: 55 11 3091 2510
Celular: 55 48 88 43 91 65
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