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2017-11-09 03:17:21 -0600 edited question Are the ISO 13788 examples correct?

Are the ISO 13788 examples correct? Did anybody try to solve the examples? I tried to do that manually, but I could not

2017-11-09 03:16:49 -0600 asked a question Are the ISO 13788 examples correct?

Are the ISO 13788 examples correct? Did anybody try to solve the examples? I tried to do that manually, but I could not

2017-08-30 15:54:46 -0600 asked a question What are the available tools for the Glaser method (EN ISO 13788)?

What are the available tools for the Glaser method (EN ISO 13788)? Is there any free or commercial Glaser method assessm

2017-07-07 07:04:47 -0600 answered a question What are the available 3d heat transfer software packages?

There's Antherm http://www.antherm.at/antherm/EN/ You can also use a multiphysics fem software like Comsol or Elmer fem

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2017-01-13 05:55:03 -0600 answered a question Shadowbox Spandrel in EnergyPlus: Warning - Inside surface heat balance did not converge

The warning ceased to pop up at the moment I added thermal mass to the adiabatic surfaces' walls.

Maybe the problem was given by the order of magnitude of the thermal mass properties of the walls.

2016-08-01 09:06:30 -0600 commented question Is there a maximum air temperature in energyplus? How do I override it?

@__AmirRoth__ I'm trying to model a Shadow box spandrel. It's insulated and it's exposed to the daylight. The model is described in this question: https://unmethours.com/question/19209...

2016-08-01 08:54:08 -0600 asked a question Is there a maximum air temperature in energyplus? How do I override it?

Running an Energy Plus model in witch air temperatures should be higher than 100°C I get several errors. Is there a upper bound for the air temperature in zones? Is it possible to override this maximum air temperature? It should reach at least 150°C.

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2016-07-28 12:44:18 -0600 asked a question Shadowbox Spandrel in EnergyPlus: Warning - Inside surface heat balance did not converge

I am modelling a shadowbox spandrel in EnergyPlus in order to obtain the max/min temperatures reached by the materials and then try to assess the risk of condensation. (model)

The geometry is the following: Zone1: 10cm thin shadow box (height:1m, lenght:1,5m), with a FenestrationSurface (Coated DGU) on the East side and Zone2 on the West side (trough an insulated wall). The other four surfaces have adiabatic BC. Zone2: a small box used to obtain the internal temperatures (22°C during the day and 18°C by night). At first I'd like to obtain the temperatures that the shadow box would reach without venting holes. The weather file is GBR_London.Gatwick.037760_IWEC. Running the attached model with Energyplus 8.5.0 I get several of the following warnings:

 ** Warning ** Inside surface heat balance did not converge with Max Temp Difference [C] =2.920E-003 vs Max Allowed Temp Diff [C] =2.000E-003*

and of the following severe errors:

* Severe * Temperature (low) out of bounds [-108.64] for zone="ZONE 1", for surface="SURFACE NORTH"*

Number of timesteps per hour is set to 60.

Given that running the model with ventilation (WindandStackOpenArea) I don't get severe errors I think that the problem might be the zone temperature limits of energyplus. (model) Although the Temperature out of bounds is negative I'm expecting to reach about 150°C in the shadowbox. Is there an upper temperature limit in Energy Plus? Is there a way to change it? I understand from this question that the room I'm trying to model is too small for the hypotheses of the convection correlations, could it be a reason for the missing convergence?

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