Jono's profile - activity

According to this error report "DSFS1" zone temps are too hot. This happens when the heat gains within the zone are grea

Hi Drew, Thanks for your response. I had some time to look into this today - I have a system where ducts at the zone lev

VAV with Minimum Flow Schedules eQuest Hi All, I am trying to model a variable flow unit in eQuest 3.65 b.7173. In this

Yes that's correct. If you go into the BCL and search "TBD" under "envelope" you should find it easily enough. Prior to

See the 2nd hyperlink in my previous comment. In short, there is an OS measure that will create everything you need. You

To add to what's above, it's a good idea to familiarize yourself with the different boundary conditions you can set in O

Hey Drew, thanks for your comment! These are good suggestions. It turns out I had a min supply temp schedule at the syst

Hey Drew, thanks for your comment! These are good suggestions. It turns out I had a min supply temp schedule at the syst

I was having the same problem with intermittent pumps. Your recommendation of using "AvailabilityManager:HighTemperature

eQuest PkgdVarVol Cooling and Heating Setpoint Issue Hi Everyone, I noticed something curious today when using eQuest 3

Hi Everyone,

I'm wondering what techniques modelers have for adding thermal bridges in OpenStudio. To be clear, I'm curious on how modelers put the values into OpenStudio once the bridges are already calculated.

I'm still learning this software and as far as I can tell, I have 3 options:

1) Use a multiplier on wall surfaces of a certain construction. Is this possible in OpenStudio? I can't seem to find it anywhere.

2) Make new surfaces that represent the thermal bridge areas and make a custom material with conductivities and widths that give me the U-value I want to represent the bridge. I liked this approach because although it's more work, it is a good visual representation. However, it requires much more drawing in Sketchup and leads to the infinite amounts of drawing errors that come with using the Sketchup Plugin.

3) Calculate an effective u-value for a surface with bridges, then apply that to the construction used in the surface. I was thinking of making a custom material with a negative conductivity that would represent all the losses from bridges, but it seems negative conductivities are not allowed in OpenStudio. The only way I can think of is to make new assemblies with a single material that gives the U-value I want. That would be a drag, because I like having the assembly made up of BCL materials so the model is transparent and easy to follow.

Look forward to hearing any tips the community is willing to share.

Have you considered modelling that sloped surface as flat? Might make your life a lot easier.

If it's a possibility, you may want to consider using floorspace.js (located in the OpenStudio App) to make these modifi

If it's a possibility, you may want to consider USING floorspace.js (located in the OpenStudio App) to make these modifi

I believe BeOpt uses hourly timesteps and with energyplus, surface temperatures would be generated for every surface at

I believe BeOpt uses hourly timesteps and with energyplus, surface temperatures would be generated for every surface at

I believe BeOpt uses hourly timesteps and with energyplus, surface temperatures would be generated at each timestep. So

Thanks David, that's good to know updating to the most recent version of OS will solve this problem.

Hi David, Thanks for the response. I exported the IDF file with and without the osm measure (i expect it doesn't make a

Thanks guys. I deleted the measure in my BCL library and redownloaded it. Seems I get the same issue. Was curious if it

Thanks guys. I deleted the measure in my BCL library and redownloaded it. Seems I get the same issue.

By "proceed" do you mean that the OS extension was available or is sketchup not opening at all? If it's the former, have

By "proceed" do you mean that the OS extension was available or is sketchup not opening at all? If it's the former, have

envelope and internal load breakdown syntax error Hi Modellers, It seems there is a syntax error in the most recent "En

envelope and internal load breakdown syntax error Hi Modellers, It seems there is a syntax error in the most recent "En

envelope and internal load breakdown syntax error Hi Modellers, It seems there is a syntax error in the most recent "En

The most correct would be to mimic reality. To do this, you might consider the inside dimensions for volume (as your air

Amazing post! I remember scratching my head about this when I first started using e+ / os, I stopped using it for a whil

I'm not sure how to answer the construction question, as I don't select constructions based on space type, though an atr

Thanks for the comment. Yes, I was wondering if the features could be inputted in the OpenStudio App.

That's a useful tip for multiple zones. I've changed the setting to "cycle on control zone" and am still experiencing th

Thanks for the comment. I tried "cycleonanyzoneheating" and it had similar results. I've updated my question for a bit m

Thanks for the comment. I tried "nightcycleanyzoneheating" and it had similar results. I've updated my question for a bi

How to Properly Setup Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that wi

Getting Acquainted with Kiva in OpenStudio Hi Everyone, I'm experimenting with the Kiva foundation object in Openstudio

Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that will cycle on when heati

Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that will cycle on when heati

Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that will cycle on when heati

Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that will cycle on when heati

Night Cycling in OpenStudio Hi Everyone, I'd like to model a single zone with an air loop that will cycle on when heati

The standard practice is to treat this as a "thermal bridge". The standard way to model a thermal bridge is to derate th

Thanks a lot for these clarifications, great info to know!