Dear Energy+ Group
I`m trying to simulate a four pipe fancoil with an electrical chiller and a boiler.
I used the fancoilautosize example file as a support.
An error is occurring (see message in the bottom).
Ideas and suggestions are appreciated.
Denilson Boschiero do Espirito Santo
Severe ** Plant temperatures are getting far too hot, check controls and relative loads and capacities
** ~~~ ** Environment=SAO_PAULO/CONGONHAS - BRA SWERA WMO#=837800, at Simulation time=02/20 09:15 - 09:30
** ~~~ **
PlantLoop Name (SupplySide)= HOT WATER LOOP
** ~~~ ** PlantLoop Setpoint Temperature=82.0 {C}
** ~~~ ** PlantLoop Inlet Node (SupplySide) does not have a Setpoint.
** ~~~ ** PlantLoop Inlet Node (DemandSide) does not have a Setpoint.
** ~~~ ** PlantLoop Outlet Node (SupplySide) has a Setpoint.
** ~~~ ** PlantLoop Outlet Node (DemandSide) does not have a Setpoint.
** ~~~ ** PlantLoop Outlet Node (SupplySide) "HW SUPPLY OUTLET NODE" has temperature=300.0 {C}
** ~~~ ** PlantLoop Inlet Node (SupplySide) "HW SUPPLY INLET NODE" has temperature=300.0 {C}
** ~~~ ** PlantLoop Minimum Temperature=10.0 {C}
**
~~~ ** PlantLoop Maximum Temperature=100.0 {C}
** ~~~ ** PlantLoop Flow Request (SupplySide)=0.0 {kg/s}
** ~~~ ** PlantLoop Flow Request (DemandSide)=0.0 {kg/s}
** ~~~ ** PlantLoop Node (SupplySide) "HW SUPPLY OUTLET NODE" has mass flow rate =4.7 {kg/s}
** ~~~ ** PlantLoop PumpHeat (SupplySide)=1088.7 {W}
** ~~~ ** PlantLoop PumpHeat (DemandSide)=0.0 {W}
** ~~~ ** PlantLoop Cooling Demand=4379245.5 {W}
** ~~~ ** PlantLoop Heating Demand=0.0 {W}
** ~~~ ** PlantLoop Demand not Dispatched=0.0 {W}
** ~~~ ** PlantLoop Unmet Demand=-4379245.5 {W}
** ~~~
** PlantLoop Capacity=1.2 {W}
** ~~~ ** PlantLoop Capacity (SupplySide)=1.2 {W}
** ~~~ ** PlantLoop Capacity (DemandSide)=0.0 {W}
** ~~~ ** PlantLoop Operation Scheme=HOT LOOP OPERATION
** ~~~ ** PlantLoop Operation Dispatched Load = 0.0 {W}
** ~~~ ** PlantLoop Operation Dispatched Load (SupplySide)= 0.0 {W}
** ~~~ ** PlantLoop Operation Dispatched Load (DemandSide)= 0.0 {W}
** ~~~ ** Branches on the Loop.
** ~~~ ** Demand Branches:
** ~~~ ** ZONESHWINLETBRANCH
** ~~~ ** Components on Branch:
**
~~~ ** PIPE:ADIABATIC:ZONESHWINLETPIPE
** ~~~ ** ZONE1HWBRANCH
** ~~~ ** Components on Branch:
** ~~~ ** COIL:HEATING:WATER:ZONE1FANCOILHEATINGCOIL
** ~~~ ** ZONESHWBYPASSBRANCH
** ~~~ ** Components on Branch:
** ~~~ ** PIPE:ADIABATIC:ZONESHWBYPASSPIPE
** ~~~ ** ZONESHWOUTLETBRANCH
** ~~~ ** Components on Branch:
** ~~~ **
PIPE:ADIABATIC:ZONESHWOUTLETPIPE
** ~~~ ** Supply Branches:
** ~~~ ** HEATING SUPPLY INLET BRANCH
** ~~~ ** Components on Branch:
** ~~~ ** PUMP:CONSTANTSPEED:HW CIRC PUMP
** ~~~ ** BOILER BRANCH
** ~~~ ** Components on Branch:
** ~~~ ** BOILER:HOTWATER:BOILER1
** ~~~ ** HEATING SUPPLY BYPASS BRANCH
** ~~~ ** Components on Branch:
** ~~~ **
PIPE:ADIABATIC:HEATING SUPPLY SIDE BYPASS
** ~~~ ** HEATING SUPPLY OUTLET BRANCH
** ~~~ ** Components on Branch:
** ~~~ ** PIPE:ADIABATIC:HEATING SUPPLY OUTLET
** ~~~ ** *************************
** ~~~ ** Possible things to look for to correct this problem are:
** ~~~ ** Capacity, Operation Scheme, Mass flow problems, Pump Heat building up over time.
** ~~~ ** Try a shorter runperiod to stop before it fatals and look at
** ~~~ ** lots of node time series data to see what is going wrong.
**
~~~ ** If this is happening during Warmup, you can use Output:Diagnostics,ReportDuringWarmup;
** ~~~ ** This is detected at the loop level, but the typical problems are in the components.
** Fatal ** CheckForRunawayPlantTemps: Simulation terminated because of run away plant temperatures, too hot
...Summary of Errors that led to program termination:
..... Reference severe error count=1
..... Last severe error=Plant temperatures are getting far too hot, check controls and relative loads and capacities
*************
************* ===== Recurring Error Summary =====
************* The following recurring error messages occurred.
*************
************* ** Warning ** Plant loop exceeding upper temperature limit,
PlantLoop="HOT WATER LOOP"
************* ** ~~~ ** This error occurred 12180 total times;
************* ** ~~~ ** during Warmup 116 times;
************* ** ~~~ ** during Sizing 0 times.
************* ** ~~~ ** Max=300.003706
*************
************* ** Warning ** GetDensityGlycol: Temperature out of range (too high) for fluid [WATER] density **
************* ** ~~~ ** This error occurred 48560 total times;
************* ** ~~~ ** during Warmup 0 times;
************* ** ~~~ ** during Sizing 0 times.
************* ** ~~~ ** Max=300.019644 {C} Min=103.933878 {C}
*************
************* ** Warning ** GetSpecificHeatGlycol: Temperature out of range (too high) for fluid [WATER] specific heat **
************* ** ~~~ ** This error occurred 303231 total times;
************* ** ~~~ ** during Warmup 0 times;
************* ** ~~~ ** during Sizing 0 times.
************* ** ~~~ ** Max=300.019644 {C} Min=125.003494 {C}
*************
*************
************* ===== 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: 3 Warning; 0 Severe Errors.
************* EnergyPlus Terminated--Fatal Error Detected. 363979 Warning; 1 Severe Errors; Elapsed Time=00hr 00min 36.90sec