Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
2

AedgOfficeHvacRadiantDoas problem

asked 2019-03-07 15:55:55 -0600

duerstad's avatar

updated 2019-03-08 09:37:23 -0600

I had been using BEopt, putting together a 3600 sf residence, slab-on-grade, and the results were consistently at least plausible. BEopt also is spot on modeling our existing residence, confirming our unfortunate experience in it. Then I switched to OpenStudio, beginning with Sketchup in order to obtain heat loads also for each area of the house. It hasn't been easy, but the results make sense and are generally consistent with all previous BEopt results. The results are also consistent with results from a famous hydronic person's load calculation software. So far, so good. Recently I brought in the BCM measure, AedgOfficeHvacRadiantDoas. It's not residential construction, but it seems to work. With considerable effort the work has been continuing. I'm especially interested in how radiant results differ from furnace and boiler results, both in BEopt and OpenStudio. Trying to make sure that results for radiant heat at least make some sense, I modeled two inches of XPS on top of the internal source construction slab, expecting that the results would be as ridiculous as the idea itself. Unfortunately the result was all but the same as results from the bare slab with the source half way into the 4" concrete. Obviously something is amiss here, but I'm not seeing it. Any ideas?

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2019-03-11 08:28:13 -0600

duerstad's avatar

In the spaces tab, in the surfaces "sub-tab," there was a blackened construction for one or more of the floors, showing that it was not a default construction. After "X'ing" this out (in the far upper right), default constructions for floors appeared. They also changed normally when I made changes in an internal source construction in the constructions tab. It is possible this was the solution; I can't be sure, but this problem is gone and energy use is consistent now with floor construction as I change insulation and floor covering.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

Stats

Asked: 2019-03-07 15:55:55 -0600

Seen: 297 times

Last updated: Mar 11 '19