Neal Kruis's profile - activity

@itsJohnHanson, Modelkit can certainly be used to generate BEopt project files. However, BEopt already automates much of

I believe you are hitting an issue that was resolved in later versions of EnergyPlus. Are you able to try the latest rel

@Melina, can you share your IDF and EPW file?

@Melina, can you explain more about what you mean by "E+ doesn't let me use Foundation as a boundary condition for a wal

Surfaces using the Kiva method need to use "Foundation" as their boundary condition type. "Ground" is reserved for the g

BTW, Can you change your response to a comment on my answer instead of a separate answer? That helps others coming here

Surfaces using the Kiva method need to use "Foundation" as their boundary condition type. "Ground" is reserved for the g

The 18C default ground temperature is rarely if ever a reasonable assumption for any building. This is primarily because

CSE performs adaptive discretization of the material layers in order to ensure numeric stability. This discretization is

@Zakaria, This file is tested every time someone makes a change to the EnergyPlus source code. I'm wondering if you've m

Anonymous, there are a few ways you can approach what you are trying to do. You can model the zone as a single space (

<anonymous user="">, there are a few ways you can approach what you are trying to do. You can model the zone as

@cecile.cr, these are interesting experiments! The subdivision of a foundation into multiple instances is an approximati

All of your zones have 100% exposed perimeter. That means that each time you subdivide into more zones, the building is

All of your zones have 100% exposed perimeter. That means that each time you subdivide into more zones, each zone is see

All of your zones have 100% exposed perimeter. That means that each new zone is seeing more and more of its foundation e

EnergyPlus will report the inside face heat loss/gain for Foundation surfaces, but not the outside face (since there is

Foundation surfaces conduct through the entire ground to both the exterior grade and to deep ground and therefore do not

Update 2 There is a bug where the automatic deep ground depth for shallow water tables isn't getting set to 1m below th

Thanks, @Tim, I am able to reproduce this issue now. I'll follow up with an update to my answer.

This is expected as, prior to the fix, the SimpleGlazingSystem could have negative absorptance at certain angles of inci

I haven't been able to reproduce this on Windows either. What installer did you use?

Hmmm...I'll test again on a Windows build. It works for me on Mac.

Not at this moment. The plotting library I've used in the past does not have a compatible license with EnergyPlus. I've

I believe you could also resolve the issue by adding a window to the zone (but I haven't tested this). The actual proble

@Tim I updated my answer after looking into your file. Turns out it isn't a problem with your Kiva set up at all...

Update When I run your file through the debugger I get a memory access error related to the daylighting controls. This

I am unable to reproduce the problem you are describing. How are you removing the insulation from the Foundation:Kiva ob

@Tim this is a very rare error that could indicate a defect in the source code. I will try to reproduce the error and se

I haven't seen the other models you're comparing to, but the model you posted has rigid insulation under the entire slab

Update: I worked with a colleague to dig into this a bit, and the explanation is actually a bit different from what I o

Here's one theory about what you are seeing (until I can confirm with a weather file): The deep ground boundary conditi

Can you also include the weather file you are using?

Hello @Roya Rajabi! Can you provide example files and/or plots to illustrate what you are seeing?

I can confirm that this is a temporary hiccup that occurred following some maintenance this past weekend. We are working

Yes there were a number of fixes to the Kiva implementation since v8.9, including the feature I mentioned earlier. Glad

Can you share your basement setpoint schedule? By default, the zone setpoint temperature is used to initialize the model

For core zones, Kiva uses a 1-D finite difference method to calculate heat exchange between the zone and the deep ground

You cannot output ground temperatures from Kiva at this time. Part of the problem is there can be multiple Kiva instance

Yes, you can ignore these severe errors. The PixelCounting method tessellates all surfaces (convex, concave, and even t

Yes, you can ignore these severe errors. The PixelCounting method tessellates all surfaces (convex, concave, and even t

Modeling the multi-dimensional heat transfer into the ground from a building foundation can be very computationally inte

Here is an updated link to the DOE-2 article.