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2019-04-25 10:24:43 -0500 | commented answer | modeling two mobile shadings in EnergyPlus at the same ? one as interior and one as exterior Insert the following in your idf: WindowsCalculationEngine , ExternalWindowsModel; Check other I/O information in In |
2019-04-17 11:12:50 -0500 | answered a question | modeling two mobile shadings in EnergyPlus at the same ? one as interior and one as exterior If you use WinCalc engine option, you will be able to model multiple shading systems. |
2019-01-29 15:41:41 -0500 | answered a question | Define optical properties based on angle of incidence If you use WINDOW program from LBNL (windows.lbl.gov/software), it will give you option to create EnergyPlus file (IDF i |
2017-02-17 01:18:04 -0500 | answered a question | Error: ** Severe ** ProcessSurfaceVertices: Divider area exceeds glazed opening for window... From window coordinates, your window seems to be horizontal one. So it is not clear to me what "horizontal" and "vertical" divider means in this case. Perhaps they are reversed. Try specifying 0 vertical dividers and 6 horizontal dividers. |
2017-02-09 17:32:31 -0500 | commented answer | blinds.xml has negative thickness Please email to: dccurcija@lbl.gov. |
2017-02-09 16:09:23 -0500 | commented answer | blinds.xml has negative thickness Thanks for pointing this out. Can you send the copy of XML file, so that we can look into this? Thanks. |
2017-02-09 09:55:19 -0500 | commented answer | blinds.xml has negative thickness Thickness is used in WINDOW for thermal calculations, so it should not affect Radiance modeling. However, if you want to calculate SHGC or U-factor in WINDOW, then you should edit xml file and put proper thickness. |
2016-09-09 11:24:45 -0500 | commented answer | THERM: Added Material Layer, R-Value decreased The reason that configuration without fiberglass panel gives better R-value is that in that configuration, both steel studs are exposed to air cavity, while in the case of configuration with fiberglass panel, only one has exposed side to air cavity. Since steel has lower emissivity than fiberglass (0.6 vs 0.9), that makes the small, non-intuitive difference in R-value. If the fiberglass panel was more insulating, this radiation heat transfer effect would be less pronounced and would result in expected behavior (i.e., configuration with fiberglass panel would be more insulating). |
2016-09-08 22:34:35 -0500 | received badge | ● Teacher (source) |
2016-09-08 20:31:24 -0500 | answered a question | THERM: Added Material Layer, R-Value decreased Adding a layer in a 1-D construction will always increase thermal resistance. Normally, this should happen in 2-D and 3-D constructions, but there may be some thermal bridging effect that can cause reversal. Can you please send both THERM files, so that we can look at it? Thanks. Charlie Curcija, LBNL Windows and Daylighting Group |