I used a simple box for test Ironbug with VRF+DOAS. I just used the default setting of the system. After re-run osm file, it return some errr about this system.
1. ** Severe ** Node NODE 13 connects to no component 2. ** Severe ** An outlet node in AirLoopHVAC=“DOAS” is not connected to any zone
Maybe the HVAC template is not very suitable for VRF+DOAS system. The pollination version is plugins_dev_PollinationGHPluginInstaller-1.18.2.
Please help me debug this error @MingboPeng
Program Version,EnergyPlus, Version 22.1.0-ed759b17ee, YMD=2022.12.22 17:41,
** Warning ** CheckEnvironmentSpecifications: SimulationControl specified doing design day simulations, but no design environments specified.
** ~~~ ** ...No design environment results produced. For these results, add appropriate SizingPeriod:* objects for your simulation.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS OFF DISCRETE", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS ON CONTINUOUS", Blank Schedule Type Limits Name input -- will not be validated.
** Severe ** Node NODE 13 connects to no component
** ~~~ ** Occurs in Supply Air Path=DOAS NODE 3 SUPPLY PATH
** ~~~ ** Check the connection to a ZoneHVAC:EquipmentConnections object
** ~~~ ** Check if this component is missing from the Supply Air Path
** Severe ** An outlet node in AirLoopHVAC="DOAS" is not connected to any zone
** ~~~ ** Could not match ZoneEquipGroup Inlet Node="NODE 3" to any Supply Air Path or controlled zone
** Fatal ** Preceding errors cause termination
...Summary of Errors that led to program termination:
..... Reference severe error count=2
..... Last severe error=An outlet node in AirLoopHVAC="DOAS" is not connected to any zone
************* Warning: Node connection errors not checked - most system input has not been read (see previous warning).
************* Fatal error -- final processing. Program exited before simulations began. See previous error messages.
************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
************* EnergyPlus Terminated--Fatal Error Detected. 3 Warning; 2 Severe Errors; Elapsed Time=00hr 00min 0.21sec
Runtime error (PythonException): ** Fatal ** Preceding errors cause termination
Traceback:
line 126, in run_osm_and_report_errors, "<string>"
line 180, in run_function_in_parallel, "C:\Program Files\ladybug_tools\python\Lib\site-packages\ladybug_rhino\grasshopper.py"
line 154, in script
@MingboPeng Thanks for your answer.You are right.I follow your workflow, openstudio can run without this error. But it return another error. It is a bug about Cooling Capacity Ratio Modifier Function\cooling Energy Input Ratio Modifier Function\Heating Energy Input Ratio Modifier Function.
Program Version,EnergyPlus, Version 22.1.0-ed759b17ee, YMD=2022.12.27 13:07,
************* Beginning Zone Sizing Calculations
** Warning ** Weather file location will be used rather than entered (IDF) Location object.
** ~~~ ** ..Location object=SITE 1
** ~~~ ** ..Weather File Location=Shanghai-Hongqiao.Intl.AP SH CHN SRC-TMYx WMO#=583670
** ~~~ ** ..due to location differences, Latitude difference=[31.20] degrees, Longitude difference=[121.34] degrees.
** ~~~ ** ..Time Zone difference=[8.0] hour(s), Elevation difference=[300.00] percent, [3.00] meters.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS OFF DISCRETE", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS ON CONTINUOUS", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** GetHTSurfaceData: Surfaces with interface to Ground found but no "Ground Temperatures" were input.
** ~~~ ** Found first in surface=ROOM_1_3F11F482..FACE4
** ~~~ ** Defaults, constant throughout the year of (18.0) will be used.
** Warning ** CheckUsedConstructions: There are 13 nominally unused constructions in input.
** ~~~ ** For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings;
************* Beginning System Sizing Calculations
** Warning ** GetVRFInput: AirConditioner:VariableRefrigerantFlow="AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1" curve values
** ~~~ ** ... Cooling Capacity Ratio Modifier Function of Low Temperature Curve Name = AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1 VRFCOOLCAPFT output is not equal to 1.0 (+ or - 10%) at rated conditions.
** ~~~ ** ... Curve output at rated conditions = 1.136
** Warning ** GetVRFInput: AirConditioner:VariableRefrigerantFlow="AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1", invalid
** ~~~ ** ...Cooling Energy Input Ratio Modifier Function of Low Part-Load Ratio Curve Name = AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1 COOLINGEIRLOWPLR has out of range value.
** ~~~ ** ...Curve minimum value of X = 0.500 must be <= Minimum Heat Pump Part-Load Ratio = 0.250.
** Warning ** GetVRFInput: AirConditioner:VariableRefrigerantFlow="AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1", invalid
** ~~~ ** ...Heating Energy Input Ratio Modifier Function of Low Part-Load Ratio Curve Name = AIR CONDITIONER VARIABLE REFRIGERANT FLOW 1 HEATINGEIRLOWPLR has out of range value.
** ~~~ ** ...Curve minimum value of X = 0.500 must be <= Minimum Heat Pump Part-Load Ratio = 0.250.
** Fatal ** GetVRFInput: Errors found in getting AirConditioner:VariableRefrigerantFlow system input. Preceding condition(s) causes termination.
...Summary of Errors that led to program termination:
..... Reference severe error count=0
..... Last severe error=
************* Warning: Node connection errors not checked - most system input has not been read (see previous warning).
************* Fatal error -- final processing. Program exited before simulations began. See previous error messages.
*************
************* ===== Final Error Summary =====
************* The following error categories occurred. Consider correcting or noting.
************* Nominally Unused Constructions
************* ..The nominally unused constructions warning is provided to alert you to potential conditions that can cause
************* ..extra time during simulation. Each construction is calculated by the algorithm indicated in the HeatBalanceAlgorithm
************* ..object. You may remove the constructions indicated (when you use the DisplayExtraWarnings option).
*************
************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
************* EnergyPlus Sizing Error Summary. During Sizing: 8 Warning; 0 Severe Errors.
************* EnergyPlus Terminated--Fatal Error Detected. 8 Warning; 0 Severe Errors; Elapsed Time=00hr 00min 0.24sec
Runtime error (PythonException): ** Fatal ** GetVRFInput: Errors found in getting AirConditioner:VariableRefrigerantFlow system input. Preceding condition(s) causes termination.
Traceback:
line 126, in run_osm_and_report_errors, "<string>"
line 180, in run_function_in_parallel, "C:\Program Files\ladybug_tools\python\Lib\site-packages\ladybug_rhino\grasshopper.py"
line 154, in script
Thanks for reporting.
This was because the new version of E+ has a different requirement than what default value that comes from OpenStudio. You can set this VRF’s MinimumHeatPumpPartLoadRatio to 0.5 to fix the issue. Meanwhile, I will add this setting to the template.
In case you need it. Here is a complete realistic VRF system with all cooling and heating performance curves that I referenced from this : openstudio-standards
Thanks for that @MingboPeng! great work really. I have a question, if I have 10 rooms divided into two zones… they share the DOAS, however, some rooms are served with VRF, while others have fan coil units. How can I combine both? can you post a small example please? Testing HVACS3.gh (207.5 KB)
@MingboPeng I have worked on that file and was able to make it work, however, the air inlet side mixers throw an error when Ironbug is added before OSM export rather than the old way of adding the HVAC after the OSM
