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Re: [EnergyPlus_Support] Earth tube model

 Dear Dusko Nikolic,

 Sorry for my delayed response.

 b = 609 Pa.

 The phase angle between the insolation and the air temperature (rad), I
ϕ , is calculated by subtracting the insolation phase angle from air
temperature phase angle. The phase angle of insolation and air temperature
is the point from the beginning of the year at which the insolation and
temperature, respectively, each reaches its minimum value among in the year.

 You can refer to the following link below for the further detailed
information on the earth tube model in EPlus.



>>> Begin forwarded message:
>>>> From: Dusko Nikolic <dulen@xxxxxxxxxx>
>>>> Date: February 8, 2010 1:08:24 AM CST
>>>> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
>>>> Subject: [EnergyPlus_Support] Earth tube model
>>>> Reply-To: EnergyPlus_Support@xxxxxxxxxxxxxxx
>>>> I can't figure out what is b in equation for average soil surface
>>>> temperature Tm. Have a look at attached pdf
>>>> Also there is cos(FI)I and sin(FI)I (FI is instead of capital greek
>>>> fi. can't get symbol font in email. :))
>>>> there is explanation for (FI)S -> phase angle difference between the
>>>> air
>>>> and soil surface temperature
>>>> and (fi)I -> phase angle between the insolation and the air
>>>> temperature
>>>> but what is (FI)I?
>>>> Thanks


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