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I just modeled it in Trace 700.

I just modeled it in Trace 700. I don't have the time to figure out how to tap into the API or whatever was suggested ju

This did the trick! Thanks! I was not aware that zone HVAC equipment could be placed on the air loop. Is the inlet side

This did the trick! Thanks!

I am trying to model a DOAS FCU system that delivers condition OA from the DOAS to the FCU terminal unit before it is delivered to the zone. There is an AirTerminal:SingleDuct:InletSideMixer object in OS that I think would be the valid choice of air terminals for this system, however, when I assign both this object as well as the ZoneHVAC:FourPipeFanCoil object to the same zone I end up getting the error at the bottom of this post when trying to simulate the model. It appears that OS is not connecting the InletSideMixer to the ZoneHVAC system. I have tried arranging the equipment in the OS Thermal Zone tab with the AirTerminal object before the ZoneHVAC object and vice versa, both resulting in the same error. Am I modeling this system incorrectly, or is this an oversight with the OS software? I am running OS v2.1.

* Severe * IP: IDF line~1442 Error detected in Object=AIRTERMINAL:SINGLEDUCT:MIXER, name=INLET SIDE MIXER * ~~~ * Field [ZoneHVAC Unit Object Name] is required but was blank
*** IDF Context for following error/warning message:
*** Note -- lines truncated at 300 characters, if necessary...
*** 1439 AirTerminal:SingleDuct:Mixer,
*** indicated Name=Inlet Side Mixer *** Only last 6 lines before error line shown.....
*** 1440 Inlet Side Mixer, !- Name
*** 1441 , !- ZoneHVAC Unit Object Type
*** 1442 , !- ZoneHVAC Unit Object Name
*** 1443 Node 1, !- Mixer Outlet Node Name
*** 1444 Node 3, !- Mixer Primary Air Inlet Node Name
*** 1445 , !- Mixer Secondary Air Inlet Node Name * Severe * IP: IDF line~1445 Error detected in Object=AIRTERMINAL:SINGLEDUCT:MIXER, name=INLET SIDE MIXER * ~~~ * Field [Mixer Secondary Air Inlet Node Name] is required but was blank * Severe * IP: Blank "required" fields found in input * Severe * IP: Out of "range" values and/or blank required fields found in input * Fatal * IP: Errors occurred on processing IDF file. Preceding condition(s) cause termination.

Problem with modeling the InletSideMixer AirTerminal with a FCU ZoneHVAC in OpenStudio I am trying to model a DOAS FCU s

How to model process cooling with ASHRAE 90.1 App G Baseline system 5 or 6 I have a LEED project that I am evaluating us

It appears that the website has changed. http://tools.enermodal.com/frameplus/

It appears that the website has change. http://tools.enermodal.com/frameplus/

Yes, the proposed case space cooling is met with a system with CHW coils and the process cooling is served by the same c

How to model process cooling with ASHRAE 90.1 App G Baseline system 5 or 6 I have a LEED project that I am evaluating us

I am trying to model a regen desiccant wheel (Trane CDQ shown below) in a DOAS using openstudio. The dessicant wheel dehumidifies and reheats the supply air after the cooling coil. Has anyone been able to model this or have a workaround that they have used?

I am referring specifically to calculating the U-value of the spandrel for the proposed design.

Can a low temperature VAV system be modeled explicitly in any of the energy modeling softwares? The system I am trying to model tempers the SA down to 46F at the AHU cooling coil, then a parallel fan power box (variable speed ECM running continuously when the AHU is on) mixes RA with the low temp SA to about 55F before it is delivered to the space to avoid occupant comfort problems associated with dumping cold air. During cooler months the cooling coil leaving air temp would be reset to 55F in order to reduce the amount of reheat required.

I have spoke with a Trane product support and Trace cannot model the 46F LAT from the coil with 55F SA temp to the space unless I were to add 9F of duct loss, which would negate the benefit of using a low temp VAV system. Is it possible to model this in any of the other programs such as eQuest, EnergyPlus or IES?

I am trying to use the Radiance Measure in OpenStudio on a simple test case building with only two zones. I have placed 1 daylight sensor, glare sensor, and illuminance map in each zone and successfully get results when running a simulation in OpenStudio without the Radiance Measure. When I apply the Radiance Measure I get the following error:

DL is deprecated, please use Fiddle

C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1760:in `read': No such file or directory - numeric/Open_Office_1.2_-_13_workers.map (Errno::ENOENT)

from C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1760:in `block (2 levels) in run'

from C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1758:in `each'

from C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1758:in `block in run'

from C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1757:in `open'

from C:/Temp/OpenStudio.f12012/resources/run/0-UserScript/user_script.rb:1757:in `run'

from in.rb:355:in `<main>'

QWaitCondition: Destroyed while threads are still waiting

I have referred to a similar question posted here that states an error similar to mine could be caused by having energyplus installed in a directory other than the default. I have EnergyPlus v8.4.0 installed as a standalone software on my computer in the default location and tried switching the simulation engine to this installation as shown in the image below but receive the same error. Is there something I am doing wrong? I am testing this on a simple 2 zone building for now but I will need to run this simulation for a building with 15 perimeter zones, and 5 interior zones with skylights.

The energy model input table for the LEED submission requires proposed construction assembly U-factor to be calculated in accordance with Appendix A, however spandrel is not mentioned in Appendix A. Do I just submit a U-factor based on the Aggregate R-value of the assembly with glass, air gap, and board insulation?

I am working on a small project that has a central heat pump with only one chiller heater module. Is it possible to model a CentralHeatPumpSystem in E+ with only one ChillerHeaterPerformance:Electric:EIR module? The Input Output Reference mentions 1 or more modules but in the Engineering Reference guide it appears that more than one module is required for heat recovery mode or simultaneous heating or cooling modes.

@David Goldwasser, are you saying that the HVAC components on the BCL can't be used in the OS application? If so, how can they be used? When I download the HVAC components I can see them in the BCL folder but can't figure out how to add them to OS.

Thanks Chris. I would like to import the csv file schedules into OpenStudio rather than E+. Is this possible?

I am having problems simulating a CentralHeatPumpSystem in E+. I started with a model that had successfully simulated a water cooled chiller with it's associated CHW and Source loops and District heating with it's associated hot water loop. I replaced the water cooled chiller with CentralHeatPumpSystem placing the CHW and Source inlet and outlet on the same nodes as the water cooled chiller had and removed the District heating and placed the CentralHeatPump HW inlet and outlet on the same nodes the District heating had as well. While doing this the IDF editor did not allow me to select the nodes from the manager window, so I just typed them in manually as I had seen the Example Files had this problem as well. I received the following node connection errors that made my simulation fail. It appears that EnergyPlus is not recognizing the nodes for this object as it should. What could I be doing wrong?

   ** Severe  ** Node Connection Error, Node="NODE 23", The same node appears as a non-parent Inlet node more than once.
   **   ~~~   ** Reference Object=PIPE:ADIABATIC, Name=PIPE ADIABATIC 2
   **   ~~~   ** Reference Object=CENTRALHEATPUMPSYSTEM, Name=CHILLERBANK
   ** Severe  ** Same component name and type has differing Node Names.
   **   ~~~   **    Component:    CENTRALHEATPUMPSYSTEM, name=CHILLERBANK
   **   ~~~   **    Nodes, inlet: NODE 29, outlet: NODE 33
   **   ~~~   **  & Nodes, inlet: NODE 101, outlet: NODE 132
   **   ~~~   **    Node Types:   UNDEFINED & Hot Water Nodes
   ** Severe  ** Same component name and type has differing Node Names.
   **   ~~~   **    Component:    CENTRALHEATPUMPSYSTEM, name=CHILLERBANK
   **   ~~~   **    Nodes, inlet: NODE 29, outlet: NODE 33
   **   ~~~   **  & Nodes, inlet: NODE 108, outlet: NODE 131
   **   ~~~   **    Node Types:   UNDEFINED & GLHE Nodes
   ** Warning ** Potential Node Connection Error for object CENTRALHEATPUMPSYSTEM, name=CHILLERBANK
   **   ~~~   **   Node Types are still UNDEFINED -- See Branch/Node Details file for further information
   **   ~~~   **   Inlet Node : NODE 29
   **   ~~~   **   Outlet Node: NODE 33
   ** Warning ** Node Connection Error for object CENTRALHEATPUMPSYSTEM, name=CHILLERBANK
   **   ~~~   **   Chilled Water Nodes not on any Branch or Parent Object
   **   ~~~   **   Inlet Node : NODE 23
   **   ~~~   **   Outlet Node: NODE 33
   ************* There were 3 node connection errors noted.
   **  Fatal  ** Previous Conditions cause program termination.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=26
   ..... Last severe error=Same component name and type has differing Node Names.
   ************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
   ************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.

I was able to generate a csv file of the daylighting schedules. I tried importing an IDF with the Schedule:File objects I need for each schedule with both OS and the SketchUp plugin but it appears that this type of schedule can't be imported. Any suggestions for importing schedules to OS from a csv?