TNZ Energy's profile - activity

DOE2.3 MsgBomb "Abnormal Simulation Results Detected" Have you run across the DOE2.3 Error, "Abnormal Simulation Results

eQuest Crash at InputModule 1 Hello, I am a long-time eQuest user, and I am currently running eQuest 3.65.7175/DOE2.3 on

eQuest Crash at InputModule 1 Hello, I am a long-time eQuest user, and I am currently running eQuest 3.65.7175/DOE2.3 on

eQuest Crash at InputModule 1 Hello, I am a long-time eQuest user, and I am currently running eQuest 3.65.7175/DOE2.3 on

Per https://en.wikipedia.org/wiki/British_thermal_unit: "The unit Mbtu is used in natural gas and other industries to in

I finally figured this out. It appears that in the condenser water loop, you cannot use LOAD-RESET in COOL-SETPT-CTRL i

This sounds like a very basic energy model that could be done in E. The only tricky thing about it would be modeling th

eQuest 3.65.7175/DOE2.2 - Water-cooled PSZ Not Functioning w CW Loop Hello, I have been using eQuest/DOE2.2 for a long t

I am updating a 5-year old open studio model generated in OSv1.7 by someone else. I am working in the latest release, OSv3.0. The model runs well and the results are generally in line with the original output. There are clearly user-defined compact schedules in the IDF that are being used to define DOAS zone airflow rates, yet OSv3.0 is not displaying these schedules in the Schedules tab. I cannot find evidence that these schedules are being added through a Ruby script (seems like a possible reason they may not appear). Any suggestions on where to look in OS to get at the schedule inputs? Thanks!

It would be great to at least be able to see what the schedule details are in the model. Displaying and editing text se

Thanks! I looked around Unmet Hours and found this description https://unmethours.com/question/38904/add-compact-schedu

Not all schedules used in a model are listed on schedules tab I am updating a 5-year old open studio model generated in

Hello Fabio, did you ever get anywhere on this? I am modeling in Design Builder a DOAS with FCUs having variable speed

Did you look at the difference in solar heat gain in the space? Blocking radiant heat gain would certainly increase loa

Heya Neal, a window assembly performance report would be very helpful! Is this still in the works?

I suggest running a model with an air wall and a second run without. This will allow you see the relative impact of usi

Hello, My understanding of how eQuest handles zone systems such as FCUs and packaged equipment is that the thermal impact of fresh air from a DOAS is only calculated when the zone fan is operating. If so, then putting an FCU fan into intermittent fan mode will only allow DOAS supply temperatures to impact zone loads when the fan is on. This would underestimate zone heating loads since DOAS air is generally cooler than room air and it would overestimate zone cooling loads since credit for the ventilation load is not being claimed. Am I reading this correctly? The issue would potentially apply to any DOAS system working in conjunction with cycling zone fans.

My current DOAS work-round is as follows:

1. Create the ERV using a packaged VAV system, make ghost space and an associated ghost plenum.
2. Output hourly return air temperatures for all zones that are served and develop 8,760-hr average return air schedules to feed back into the exhaust side of the DOAS ERV via the ghost plenum.
3. Apply 100% latent loads into the plenum for occupant and equipment loads.

4. Specific to correcting the DOAS sensible impact on spaces is to

   a.) Remove the OA for the zone

   b.) Apply a negative process internal energy source to each zone (based on zone ventilation cfm (80-55)1.08), and

   c.) Apply an 8,760-hr average diversity schedule developed from the hourly difference between DOAS supply air (taken from the ghost zone associated with the ERV) and the average return air temperature from all of the spaces that are served.

The downside of this approach is that I am applying an average process load to all spaces based on the average return air temperature. Oh, and it is clunky. Is there something more elegant and accurate out there? Do I need to do this?

Thanks!

Eric