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2022-02-26 13:16:06 -0500 | received badge | ● Taxonomist |
2015-04-22 12:07:49 -0500 | asked a question | Is it possible to control zone level equipment as secondary and not primary equipment? If I ever add zone level equipment as supplemental heating, such as baseboard or radiant floor, I cannot get that equipment to be secondary to the primary equipment, such as a roof top unit. Is it necessary to use energy management system code to implement this type of control or am I missing something? This is very common control and I would assume that it would be easy to implement in the OpenStudio app. |
2015-04-17 10:21:38 -0500 | commented answer | How to make a choice argument for ALL objects of a certain type (measure)? Could you provide an example for number 1? Would you be using object names from the model? handles? |
2015-04-16 11:58:02 -0500 | commented question | How to make a choice argument for ALL objects of a certain type (measure)? In addition to making a choice argument for "all cases", is it difficult to have the option to select more than one case? For example, if I wanted to manually select all low temperature cases. |
2015-04-16 11:54:25 -0500 | received badge | ● Editor (source) |
2015-04-16 11:53:34 -0500 | asked a question | How to make a choice argument for ALL objects of a certain type (measure)? Here is what I have so far: Here I make a choice argument with all the refrigeration cases in the model ref_case = OpenStudio::Ruleset::makeChoiceArgumentOfWorkspaceObjects("ref_case","OS_Refrigeration_Case".to_IddObjectType,model,true) ref_case.setDisplayName("Apply the measure to") args << ref_case I would like to also have the option of "All refrigeration cases". I have seen many examples that use the following method: Here I add building to string vector with space type building = model.getBuilding space_type_handles << building.handle.to_s space_type_display_names << "Entire Building" However, I would like to maintain the 'makeChoiceArgumentOfWorkspaceObjects("ref_case","OS_Refrigeration_Case".to_IddObjectType,model,true)' In staying with this approach, how would I add an option for "All Refrigeration Cases"? |
2015-04-03 13:54:50 -0500 | commented answer | How to Model Makeup Air Unit in OpenStudio I have a gas fired Kitchen MAU supplying OA directly to a zone that already has a dedicated roof top unit. Would the above approach be the best for this scenario? If so, can you further explain how to use the air terminal single duct supply side mixer object. |
2015-03-31 13:53:43 -0500 | asked a question | Transcritical compressor coefficients Has anyone been successful obtaining and using manufacturer compressor curves for transcritical CO2 refrigeration systems? I have attempted to download the transcritical/subcritical compressor curves from manufacturer and apply in model; however, the energy use is all over the place (extremely negative OR extremely positive). |
2015-03-27 11:46:45 -0500 | received badge | ● Supporter (source) |
2015-03-27 11:34:48 -0500 | commented answer | Has anyone gotten a two-stage Transcritical CO2 system to function in OS? I got it to work after removing the 'TwoStage' field. Thank you! I would prefer to do all of this with measures; however, I still have not been able to wrap my head around the complete process of developing a measure. I have gone through the measure writing guide (which all makes sense), but once I get into the SDK documentation and try to figure out how to write my own measure I get lost. I appreciate the feedback! |
2015-03-27 09:47:42 -0500 | commented answer | Has anyone gotten a two-stage Transcritical CO2 system to function in OS? Why does OpenStudio seem so finicky with manually adding osm objects to the .osm file? Is there something obvious that I could be missing? I use generated handles (so as to not randomly create my own handles) and it still seems to not like the addition. Wouldn't a OS measure pretty much do the same thing? I understand the need for a OS measure with more complicated additions, but with refrigeration the objects are not really connected to anything in the same way HVAC is. So, it would seem that just adding the transcritical system object should be pretty simple/straightforward. |
2015-03-27 08:55:07 -0500 | asked a question | Has anyone gotten a two-stage Transcritical CO2 system to function in OS? I have been unable to get a two-stage Transcritical CO2 system to even open up in the OS app. My approach has been to create the standard refrigeration system objects in the OS app, with compressors and condenser objects. Then, manually edit the .osm text file to replace the standard refrigeration objects with transcritical objects, replace the condenser with a gas cooler object, and add transcritical compressor coefficients for the high pressure compressors. After making these changes, I have not been able to reopen the model file in the OS app. The error continues to say either field 3 or field 4 of the transcritical system has an incorrect data type: The collection is INVALID at strictness level 'Draft', because of the errors: Field level data error of type DataType . Error is in an object of type 'OS:Refrigeration:TranscriticalSystem', named 'Rack A1B1 TransRefrigSys', in field 4. Additional information about the error type: field-level data is of an incorrect type. |
2015-03-26 12:52:26 -0500 | received badge | ● Student (source) |
2015-03-26 12:26:16 -0500 | asked a question | Is it possible to mirror the OpenStudio space geometry? I have created a completed OpenStudio model of a prototypical building. I need to model this building in various locations (easy part) and in some cases with the building mirrored (difficult part). I have been unable to successfully mirror the building geometry. I have tried to mirror the geometry by the scale button, and it appears to work. However, once I close out of Sketchup and open the model back up in Sketchup, the zones are discombobulated. It seems that the OpenStudio spaces do not play well with being mirrored (even though it is possible to do in Sketchup), unless it is a simple translation (moving or rotating). Has anyone been able to successfully mirror building geometry (OpenStudio spaces) in Sketchup? |