First time here? Check out the Help page!
2023-08-21 02:56:15 -0500 | received badge | ● Notable Question (source) |
2022-07-12 15:17:10 -0500 | received badge | ● Self-Learner (source) |
2022-03-21 09:19:24 -0500 | received badge | ● Popular Question (source) |
2021-04-29 15:12:22 -0500 | marked best answer | Using the Indoor Air Quality option for DCV, why isn't the zone CO2 setpoint achieved? In Energy Plus, I am using the Indoor Air Quality (Contaminant concentration modeling) approach to simulate DCV. The zone CO2 setpoint of 1100 ppm is not met. Below are graphs for one system, showing a "high" occupancy day in the first graph, and a "normal" occupancy day followed by two "low" occupancy days in the second graph; system cfm flow is plotted the left axis (blue = mixed air, orange = outside air) and zone C02 ppm (yellow) on the right axis. Looking at these it seems to me that although the zone CO2 setpoint is not met, the system airflow will not increase above what would be provided for space conditioning. On the "normal" day graph, the outside air (orange) is capped at the system minimum flow rate (sum of all connected terminal min flows). On the "high" day graph, the system flow increases above the system minimum, but this seems to be driven by space load rather than by CO2 concentration, as the zone CO2 setpoint is still not met. "high" occupancy day: "Normal" followed by two "low" occupancy days: I found this post that I think is related, regarding using EMS to increase zone flow due to CO2 concentration. Is EMS the only way to do this? As requested, here are some representative objects related to the DCV setup from my file: (more) |
2019-05-08 10:13:25 -0500 | received badge | ● Popular Question (source) |
2018-07-16 16:54:40 -0500 | edited answer | Designbuilder/EnergyPlus Relief fan I found your question because I have the same one. In Energy Plus, I was able to add a relief fan as a component on the |
2018-07-16 16:53:31 -0500 | answered a question | Designbuilder/EnergyPlus Relief fan I found your question because I have the same one. In Energy Plus, I was able to add a relief fan as a component on the |
2018-05-17 10:16:27 -0500 | commented answer | Error importing ESO file Also check if you have used “Detailed” reporting frequency for any of the requested output variables in the INP file. I’ |
2018-04-24 19:28:19 -0500 | asked a question | How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling I have a model with so |
2018-04-24 10:58:56 -0500 | edited question | How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling My model has electric, |
2018-04-24 10:56:10 -0500 | asked a question | How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling How to prevent Energy Plus Heat-Only Fan Coil Heating Coil from operating during call for cooling My model has electric, |
2018-04-16 01:08:44 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: Okay, I found and followed the approach illustrated in the diagram "Two Tank Solar Heating System Diagr |
2018-04-16 01:06:54 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: Okay, I found and followed the approach illustrated in the diagram "Two Tank Solar Heating System Diagr |
2018-04-16 01:05:39 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: Okay, I found and followed the approach illustrated in the diagram "Two Tank Solar Heating System Diagr |
2018-04-15 13:44:44 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: I don't grasp how heat can be moved from the preheat waterheater with zero heating capacity (PreH WH) |
2018-04-15 13:44:01 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: I don't grasp how heat can be moved from the preheat waterheater with zero heating capacity (PreH WH) |
2018-04-15 13:43:00 -0500 | commented answer | Water condenser low temperature, chiller heat recovery @Aaron Boranian: I don't grasp how heat can be moved from the preheat waterheater with zero heating capacity (PreH WH) |
2018-04-03 16:01:55 -0500 | commented question | Why could the EnergyPlus Run Status reported Elapsed Time not equal the Total elapsed clock time? @David Goldwasser, thanks for this idea. The file is located on local drive of my laptop. |
2018-03-28 11:34:25 -0500 | commented answer | What is the best hardware setup to minimize run time? @Neal Kruis, Specifically how would one diagnose item #3.Memory, to determine if it is an issue? |
2018-03-28 11:17:36 -0500 | asked a question | Why could the EnergyPlus Run Status reported Elapsed Time not equal the Total elapsed clock time? Why could the EnergyPlus Run Status reported Elapsed Time not equal the Total elapsed clock time? I have an energy plus |
2018-03-16 09:17:05 -0500 | edited question | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? I have an Energy Plus file with th |
2018-03-16 09:16:32 -0500 | edited question | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? I have an Energy Plus file with th |
2018-03-15 10:51:40 -0500 | commented answer | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? @Avi, thanks for pointing me to that post, which indicates that increasing the timestep may be a solution. I had not fou |
2018-03-15 10:51:17 -0500 | commented answer | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? @Avi, thanks for pointing me to that post, which indicates that increasing the timestep may be a solution. I had not fou |
2018-03-14 23:55:18 -0500 | edited answer | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? I did some experimentation and found that once I split the IDF file into two halves (in a text editor) I was able to sav |
2018-03-14 23:55:18 -0500 | received badge | ● Associate Editor (source) |
2018-03-14 23:52:33 -0500 | marked best answer | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? I have an IDF file that I exported from Design Builder (v.5.3.4.004). The BUT, when I try to save the file, it aborts during the process with the error: "Run-time error '9': Subscript out of range", once I click "Okay" on that error, the IDFEditor quits. (I can open the new IDF file that I was attempting to save, and it does contain a incomplete portion of the IDF. Any ideas how I can solve this? |
2018-03-14 23:52:31 -0500 | edited answer | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? I did some experimentation and found that once I split the IDF file into two halves (in a text editor) I was able to sav |
2018-03-14 16:18:01 -0500 | edited question | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? I have an Energy Plus file with th |
2018-03-14 16:17:11 -0500 | commented answer | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Thanks for the help @JasonGlazer! |
2018-03-14 16:16:27 -0500 | asked a question | What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? What does the EnergyPlus warning "Inside surface heat balance did not converge" mean? I have an Energy Plus file with th |
2018-03-13 13:49:32 -0500 | commented answer | PG&E Cool Tools Chiller tool- Generating Performance Curve E+ @Anna Osborne Brannon, I just noticed that there is a tool in the PreProcess folder of the Energy Plus installation that |
2018-03-10 17:30:27 -0500 | edited answer | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? I did some experimentation and found that once I split the IDF file into two halves (in a text editor) I was able to sav |
2018-03-10 10:16:42 -0500 | answered a question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? I did some experimentation and found that once I split the IDF file into two halves (in a text editor) I was able to sav |
2018-03-10 01:36:26 -0500 | edited question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range" aborting on Save-as? I have an IDF file tha |
2018-03-10 01:28:47 -0500 | edited question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range" on Save-as? I have an IDF file that I expor |
2018-03-10 01:23:24 -0500 | edited question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range" on Save-as? I have an IDF file that I expor |
2018-03-10 01:23:04 -0500 | edited question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range" on Save-as? I have an IDF file that I expor |
2018-03-10 01:22:31 -0500 | edited question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range"? I have an IDF file that I exported from De |
2018-03-10 01:21:53 -0500 | asked a question | Why does IDF Editor issue error "Run-time error '9': Subscript out of range," aborting on Save-as? Why does IDF Editor issue error "Run-time error '9': Subscript out of range"? I have an IDF file that I exported from De |
2018-03-01 15:03:43 -0500 | marked best answer | What air terminal unit types are allowed on a AirLoopHVAC:Unitary system? I see that the diagrams in the section of the I/O reference on |
2018-03-01 12:40:07 -0500 | asked a question | What air terminal unit types are allowed on a AirLoopHVAC:Unitary system? What air terminal unit types are allowed on a AirLoopHVAC:Unitary system? I see that the diagrams in the section of the |
2018-03-01 12:13:47 -0500 | commented answer | Single Zone VAV serving multiple zones @dradair, did you have any luck finding a solution? I'm looking at the same problem. Did you consider using an AirLoopHV |
2018-02-17 15:34:00 -0500 | commented question | Why is this Energy Plus VAV system operating at maximum airflow when all connected zones require heating? ...The reheat coil in one of the two zones, for example, is at an autosized cap. of ~109kW, whereas the zone predicted s |