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)
