Error while modeling radiant underfloor cooling system
Hello guys! I'm a student in Technical University in Crete and I've been struggling a couple of weeks in a project, in which I would like to model a radiant floor cooling system using "Low Temperature Radiant Variable Flow" and I'm getting the following warnings every time:
Error file results:
Program Version,EnergyPlus, Version 9.0.1-bb7ca4f0da, YMD=2019.01.18 18:50, ************* Beginning Zone Sizing Calculations ** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS ON DISCRETE", Blank Schedule Type Limits Name input -- will not be validated. ** 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=SURFACE 16 ** ~~~ ** Defaults, constant throughout the year of (18.0) will be used. ** Warning ** CheckUsedConstructions: There are 1 nominally unused constructions in input. ** ~~~ ** For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings; ** Warning ** Calculated design heating load for zone=THERMAL ZONE 4 is zero. ** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs. ** Warning ** Calculated design heating load for zone=THERMAL ZONE 8 is zero. ** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs. ************* Beginning Plant Sizing Calculations ** Warning ** GetElectricEIRChillerInput: Chiller:Electric:EIR="CHILLER - AIR COOLED" ** ~~~ ** Adding OutdoorAir:Node=CHILLER - AIR COOLED INLET NODE FOR CONDENSER ** Warning ** GetElectricEIRChillerInput: Chiller:Electric:EIR="CHILLER - AIR COOLED" ** ~~~ ** Energy input ratio as a function of temperature curve output is not equal to 1.0 (+ or - 10%) at reference conditions. ** ~~~ ** Curve output at reference conditions = 0.850 ** Warning ** Output:Meter:MeterFileOnly requested for "Electricity:Facility" (TimeStep), already on "Output:Meter". Will report to both eplusout.eso and eplusout.mtr ************* Testing Individual Branch Integrity ************* All Branches passed integrity testing ************* Testing Individual Supply Air Path Integrity ************* All Supply Air Paths passed integrity testing ************* Testing Individual Return Air Path Integrity ************* All Return Air Paths passed integrity testing ************* No node connection errors were found. ************* Beginning Simulation ** Warning ** ZoneHVAC:LowTemperatureRadiant:VariableFlow [LOW TEMP RADIANT VAR FLOW 1] ** ~~~ ** Surface [SURFACE 28] temperature below dew-point temperature--potential for condensation exists ** ~~~ ** Flow to the radiant system will be shut-off to avoid condensation ** ~~~ ** Predicted radiant system surface temperature = 33.33 ** ~~~ ** Zone dew-point temperature + safety delta T= 33.79 ** ~~~ ** Environment=SOUDA/KHANIA ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:00 - 00:10 ** ~~~ ** Note that a 1.0000 C safety was chosen in the input for the shut-off criteria ** ~~~ ** Note also that this affects all surfaces that are part of this radiant system ** Warning ** ZoneHVAC:LowTemperatureRadiant:VariableFlow [LOW TEMP RADIANT VAR FLOW 6] ** ~~~ ** Surface [SURFACE 49] temperature below dew-point temperature--potential for condensation exists ** ~~~ ** Flow to the radiant system will be shut-off to avoid condensation ** ~~~ ** Predicted radiant system surface temperature = 32.67 ** ~~~ ** Zone dew-point temperature + safety delta T= 38.23 ** ~~~ ** Environment=SOUDA/KHANIA ANN CLG .4% CONDNS DB=>MWB, at Simulation time=07/21 00:00 - 00:10 ** ~~~ ** Note that a 1.0000 C safety was ...