Peter Horvath's profile - activity

Thank you for your response, but i'm using e+ under DesignBuilder platform - sorry for not informing you.

I'm trying to simulate an AHU, which modulates its fan speed due to the sensible heat gains from the zones. The AHU should use its own heating and cooling coil without any reheat in the zone (there is no other HVAC equipment there, like FanCoils or radiators)

As far as i know, for this purpose i should use VAV instead of CAV, but when check the fan's Mass Flow Rate it's linear - not modulating at all...

Am I understanding wrongly these systems?

I've checked my spreadsheet, comparing to ASHRAE 55, it works correctly. As you written, the problem should be caused by averaging the timestep data. Unfortunately i can only access the hourly data, so if anyone tells me how to get the timestep data i will check them!

hi all!

Currently i'm investigating the PMV-PPD outputs of a DesignBuilder simulation. I exported the hourly PMV-PPD values and the ones which correstpond them (air temperature, radiant temperature, air velocity (0,137), rel.humidity, metabolic rate, clo value) When i calculate the PMV values from the 6 variables in excel i get more than 60% differnce between my calculation and the DB (e+) calculation.

Can anyone help me finding the reason of the difference? Have anyone faced this problem before?

thanks a lot, Peter

The SketchUp and the IFC file is saved from Archicad 19. Unfortunately OS do not recognize these models' spaces. The gbXML should contain, the building geometry and spaces within. The energy simulation is driven by DesignBuilder. Is it possible to get this gbXML from an imported modell, or i must draw again the geometry in Sketchup?

hi David!

Thanks for your comment.

I would clarify my exporting demands: - I have an .skp Skechup file, including the building's geometry. I want to translate this model to gbXML to use this fileformat by a 3rd software. - OR it is also possible to use the .ifc qeometry file, and convert it to gbXML.

OS 1.9.0 can import IDF, gbXML, SDD, IFC (just for BIMserver)

Can you suggest me a workflow, for this translating process?

hello!

I aimed exporting a Sketchup modell to gbXML format. I tried 2 ways, but none of them worked. Can anyone help me?

Method 1: I installed Sketchup 2015 and OpenStudio 1.14 (Energy plus 8.4 is installed). After starting Sketchup i recieve this message: Cannot locate Data Dictionary file Energy+.idd - Open Studio will not be loaded.

Method 2: To eliminate this problem, I intalled Sketchup 2013 and OpenStudio 1.11 (Energy plus 8.1 is installed). Sketchup and OS starts normally, but in the Plugins/Legacy Openstudio menu the import/export button is not visible.

Thank you for your advice, Peter

hello!

I aimed exporting a Sketchup modell to gbXML format. I tried 2 ways, but none of them worked. Can anyone help me?

Method 1: I installed Sketchup 2015 and OS1.14 (Energy plus 8.4 is installed). After starting Sketchup i recieve this message: Cannot locate Data Dictionary file Energy+.idd - Open Studio will not be loaded.

Method 2: To eliminate this problem, I intalled Sketchup 2013 and OS1.11 (Energy plus 8.1 is installed). Sketchup and OS starts normally, but in the Plugins/Legacy Openstudio menu the import/export button is not visible.

Thank you for your advice, Peter