Re: [EnergyPlus_Support] Intermediate Building Layer Temperatures

Thank you for the reply.

I've checked the EIO ouput file, however the only information related is the selection of heat balance algorithm.

No further information can be obtained from EIO regarding determination of nodes for each construction.

ESO file reports individual outputs, however, these variables do not explain the rationale behind the total number of nodes per construction.

How is this discretisation realized? I cannot figure it out till now.

Best.

Omer T.

From: "Griffith, Brent" <brent.griffith@xxxxxxxx>
To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Monday, September 26, 2011 3:52 PM
Subject: RE: [EnergyPlus_Support] Intermediate Building Layer Temperatures

Check the EIO output file, the CondFD nodes used for each construction are summarized there.

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of O. Tugrul Karaguzel
Sent: Monday, September 26, 2011 1:37 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Intermediate Building Layer Temperatures

Hi Mrs. Lawrie,

I've just received your reply from the Helpdesk system. I solved crash problem when I removed the material defined as Material:InfraredTransparent.

Now I can run simulations and get CondFD Nodal Temperature values for every building surface (including glazing materials). The thing is EnergyPlus generated results for a number of nodes (which is different for each surface). For example I have a partition wall with 3 nodes reported, or a floor slab with 11 nodes reported.

I'd like to learn how E+ defines the number of nodes to be reported? Are the nodes representing mid-layer or layer-surface temperatures?

Thanks so much.

Regards.

Omer T. Karaguzel

From: O. Tugrul Karaguzel <tugrulkaraguzel@xxxxxxxxx>
To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Monday, September 26, 2011 3:00 PM
Subject: [EnergyPlus_Support] Intermediate Building Layer Temperatures

Hi All,

My question is about EnergyPlus output variables:

Is there are method to get surface temperature values of intermediate building layers that make up the whole envelope construction assembly ?

Normally, inside and outside temperature of building surfaces are reported. I tried to use Conduction Finite Difference (CondFD) as a surface heat balance algorithm instead of the usual CTF (Conduction Transfer Function).

According to E+ input/output reference, one of the CondFD outputs is "CondFD Nodal Temperature [C]" for each node in the surface simulated. However, E+ crashes with such input. I already send a ticket to E+ support system.

However, there may be another way of getting such a variable from E+ which I may be ignoring now.

Thanks for the replies.

Best.

Omer T. Karaguzel

PhD Candidate Carnegie Mellon University

Center for Building Performance and Diagnostics

Pittsburgh, PA, U.S.A.