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2018-09-12 09:11:38 -0500 | commented question | EnergyPlus freezes/hang during simulation Thank you @Julien Marrec Github Issue |
2018-09-12 09:11:32 -0500 | commented question | EnergyPlus freezes/hang during simulation Thank you @Julien Marrec Github Issue |
2018-09-12 09:11:32 -0500 | received badge | ● Commentator |
2018-09-12 03:55:09 -0500 | edited question | EnergyPlus freezes/hang during simulation EnergyPlus freezes/hang during simulation Running a large parametric study of around 8000 energy models I'm experiencing |
2018-09-12 03:53:59 -0500 | asked a question | EnergyPlus freezes/hang during simulation EnergyPlus freezes/hang during simulation Running a large parametric study of around 8000 energy models I'm experiencing |
2018-09-12 03:43:46 -0500 | marked best answer | .idf BSDF in resolution higher than 145x145 Hi ! Building on: https://bigladdersoftware.com/epx/doc... -can EnergyPlus deal with BSDF in higher resolution than 145x145? Cheers |
2018-09-07 06:56:44 -0500 | commented answer | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name @vidanovic do you have any updates on this ? Cheers Tobias |
2018-08-24 04:25:39 -0500 | marked best answer | Big difference in results between EnergyPlus versions I have a question regarding a big change in results from running the same .idf in EnergyPlus version 8.5 vs version 8.9. I noticed the difference when I had to update some studies that I have done previously since I couldn’t recreate the same results. I located the difference to be that I was now running version 8.9 instead of 8.5 previously. Here is an example file, run in version 8.5 and version 8.9, with the same idf: Files Does anybody know what changed in the EnergyPlus versions that is causing this difference (I guess it has to do with the calculation methods for the objects in the idf file)? I’m inclined to stick with EnergyPlus version 8.5 because when running a comparison with a different simulation tool (IDA ICE) there is very high correspondence of results, which there is not when comparing IDA ICE to version 8.9 * UPDATE * Thank you very much for your input @mdahlhausen - here are some more details: Note - Good catch that HVAC equipment sizing has changed, but since I'm modelleling and ideal system that keeps the temperature between 22 and 24 degC, in my mind the yearly energy consumption should be the same, do you agree? +++++ Version 8.5 +++++ Cooling peak load (before sizing factor): 975.40212 W Heating peak load (before sizing factor): 174.39179 W Zone Ideal Loads Supply Air Total Cooling Energy (Yearly): 1086.916048 kWh Zone Ideal Loads Supply Air Total Heating Energy (Yearly): 121.428125 kWh Min Air Temperature: 22 degC Max Air Temperature: 24 degC +++++ Version 8.9 +++++ Cooling peak load (before sizing factor): 870.05914 W Heating peak load (before sizing factor): 132.20619 W Zone Ideal Loads Supply Air Total Cooling Energy (Yearly): 1016.466383 kWh Zone Ideal Loads Supply Air Total Heating Energy (Yearly): 75.030207 kWh Min Air Temperature: 22 degC Max Air Temperature: 24 degC +++++ Idf object +++++ |
2018-08-24 04:25:11 -0500 | marked best answer | Area and volume calculations in EnergyPlus Hi I have a question regarding a discrepancy I have found between the EnergyPlus tips and tricks (https://bigladdersoftware.com/epx/doc...) and a study I am performing. To be more specific the tips and tricks document states that: “A suggested approach is to use outside dimensions for exterior surfaces, and centerline dimensions for interior surfaces. This produces fully connected geometry with an appropriate amount of floor area, zone volume, and thermal mass.” However in my study I have found that EnergyPlus uses that total distance between surfaces to calculate floor area. This can be seen when calculating equipment load and people load (since that is inputtet pr. floor area). Does anybody have an explanation for this? Cheers |
2018-08-24 04:24:08 -0500 | marked best answer | EnergyPlus Measure to import BSDF-idf from LBNL WINDOW Hi guys I'm trying to create a EnergyPlus measure to import the BSDF-idf input from LBNL WINDOW. Most of the functionality needed can be found in the BCL measure "inject_idf_ojbects". However the measure chages the formatting of all the matrix data (to something that cannot run) - example: (correct formatting on the left before applying the measure - wrong formatting on the right after application of the measure) I think it comes down to that one of these functions source_idf = OpenStudio::IdfFile::load(OpenStudio::Path.new(source_idf_path)).get workspace.addObjects(source_idf.objects) uses "," to destinguise a new line and not "\n" as it should in this case. Does anybody have an idea of how to correctly import the BSDF-idf using a EnergyPlus measure? Cheers Tobias |
2018-08-22 07:27:19 -0500 | marked best answer | Zone Ideal Loads mismatch Hi guys I can't get the following equation (for both heating and cooling) to match in my simulations (example file idf): Zone Ideal Loads Supply Air Total Cooling Energy + Zone Ideal Loads Heat Recovery Total Cooling Energy = Zone Ideal Loads Zone Total Cooling Energy+ Zone Ideal Loads Outdoor Air Total Cooling Energy <=> 2312.1212797468634 + 0 = 8598.715438236986 + 77.11803171210939 [kWh/year] EnergyPlus version 8.5 ----- Update ---- Have the same issue in version 8.9, also for both heating and cooling +++++ Info +++++ HVAC objects from expanded idf: (more) |
2018-08-22 07:27:19 -0500 | received badge | ● Scholar (source) |
2018-08-22 06:21:57 -0500 | commented answer | Zone Ideal Loads mismatch Also diving more into the engineering reference a question comes to mind, with reference to: Ideal Loads Air System - E |
2018-08-22 06:21:56 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:21:22 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:21:16 -0500 | commented answer | Zone Ideal Loads mismatch Also diving more into the engineering reference a question comes to mind, with reference to: Ideal Loads Air System - E |
2018-08-22 06:08:13 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:07:38 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:07:33 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:07:28 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:04:38 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:04:18 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:04:06 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:04:03 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-22 06:03:52 -0500 | commented answer | Zone Ideal Loads mismatch Thank you very much for the answer @MJWitte I think it would be great to add the suggested output for completeness and |
2018-08-14 04:27:31 -0500 | edited question | Zone Ideal Loads mismatch Zone Ideal Loads mismatch Hi guys I can't get the following equation (for both heating and cooling) to match in my simu |
2018-08-14 03:36:08 -0500 | received badge | ● Supporter (source) |
2018-08-14 01:43:13 -0500 | commented answer | Big difference in results between EnergyPlus versions Thank you for the elaboration @MJWitte ! |
2018-08-14 01:41:18 -0500 | commented question | Zone Ideal Loads mismatch Thank you @Aaron Boranian ! I have updated the post with your suggestions |
2018-08-14 01:40:28 -0500 | edited question | Zone Ideal Loads mismatch Zone Ideal Loads mismatch Hi guys I can't get the following equation (for both heating and cooling) to match in my simu |
2018-08-14 01:34:31 -0500 | edited question | Zone Ideal Loads mismatch Zone Ideal Loads mismatch Hi guys I can't get the following equation (for both heating and cooling) to match in my simu |
2018-08-14 01:14:37 -0500 | edited question | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name |
2018-08-13 11:21:37 -0500 | asked a question | Zone Ideal Loads mismatch Zone Ideal Loads mismatch Hi guys I can't get the following equation (for both heating and cooling) to match in my simu |
2018-08-13 10:50:05 -0500 | edited answer | Big difference in results between EnergyPlus versions Thank you very much for your input @mdahlhausen - here are some more details: Note - Good catch that HVAC equipment siz |
2018-08-13 10:47:52 -0500 | answered a question | Big difference in results between EnergyPlus versions Thank you very much for your input @mdahlhausen - here are some more details: Note - Good catch that HVAC equipment siz |
2018-08-10 05:59:05 -0500 | edited question | Big difference in results between EnergyPlus versions Big difference in results between EnergyPlus versions Hi guys I have a question regarding a big change in results from |
2018-08-10 05:58:03 -0500 | asked a question | Big difference in results between EnergyPlus versions Big difference in results between EnergyPlus versions Hi guys I have a question regarding a big change in results from |
2018-08-05 13:16:12 -0500 | edited answer | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name @vidanovic thank you for your reply - tried running the same .idf files only changing the window construction Constructi |
2018-08-05 13:15:40 -0500 | answered a question | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name @vidanovic thank you for your reply - tried running the same .idf files only changing the window construction Constructi |
2018-07-28 04:14:35 -0500 | edited question | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name |
2018-07-28 03:54:59 -0500 | edited question | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name |
2018-07-28 03:49:52 -0500 | asked a question | Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name Discrepancies when using EMS to assign Construction:ComplexFenestrationState compared to assigning by construction name |
2018-07-27 05:58:01 -0500 | commented answer | EnergyPlus Measure to import BSDF-idf from LBNL WINDOW Thank you Yes I should have been more elaborate on "something that cannot run": No error message, but empty output file |
2018-07-27 05:57:38 -0500 | commented answer | EnergyPlus Measure to import BSDF-idf from LBNL WINDOW Thank you Yes I should have been more elaborate on "something that cannot run": No error message, but empty output file |