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Re: [EnergyPlus_Support] Warnings

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Warnings
From: Richard Raustad <RRaustad@xxxxxxxxxxxx>
Date: Thu, 06 May 2010 17:38:07 -0400
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Check the performance curve for the Energy input ratio as a function of 
temperature curve for the chillers. At the design conditions, the output 
of this curve should be very near 1. It's not off by much, but the 
coefficients need a slight adjustment.

eplusven wrote:
>
> Hi All,
>
> I am getting the following warnigns and they are happening repeatedly. 
> Please help, how can I fix these
>
> Thanks
> -ven
>
> Program Version,EnergyPlus 4.0.0.024, 5/5/2010 6:24 PM,IDD_Version 
> 4.0.0.024
> ************* Beginning Zone Sizing Calculations
> ** Warning ** Energy input ratio as a function of temperature curve 
> output is not equal to 1.0
> ** ~~~ ** (+ or - 10%) at reference conditions for 
> Chiller:Electric:EIR= CHILLER2
> ** ~~~ ** Curve output at reference conditions = 1.136
> ** Warning ** Energy input ratio as a function of temperature curve 
> output is not equal to 1.0
> ** ~~~ ** (+ or - 10%) at reference conditions for 
> Chiller:Electric:EIR= CHILLER3
> ** ~~~ ** Curve output at reference conditions = 1.136
> ** Warning ** Energy input ratio as a function of temperature curve 
> output is not equal to 1.0
> ** ~~~ ** (+ or - 10%) at reference conditions for 
> Chiller:Electric:EIR= CHILLER1
> ** ~~~ ** Curve output at reference conditions = 1.136
> ************* Beginning System Sizing Calculations
> ************* Beginning Plant Sizing Calculations
> ** Warning ** In calculating the design coil UA for Coil:Cooling:Water 
> AHU COOLING COIL
> ** ~~~ ** no apparatus dew-point can be found for the initial entering 
> and leaving conditions;
> ** ~~~ ** the coil bypass factor is unrealistically large;
> ** ~~~ ** the coil outlet design conditions will be changed to correct 
> the problem.
> ** ~~~ ** The initial design conditions are: Tair,in = 25.94
> ** ~~~ ** Wair,in = 8.7981E-003
> ** ~~~ ** Twater,in = 5.00
> ** ~~~ ** Tair,out = 24.00
> ** ~~~ ** Wair,out = 8.0000E-003
> ** ~~~ ** The revised design conditions are: Tair,out = 22.26
> ** ~~~ ** Wair,out = 8.6981E-003
> ************* 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.
> ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC 
> loops, at NEXTDAYSIM, 04/01 18:00 - 18:15
> ** ~~~ ** SimFlags=[TFFFFFFF] 
> AirLoops[T],ZoneEq[F],NonZoneEq[F],PlantLoops[F],CondLoops[F],ElecCircuits[F],PlantDemandLoops[F],CondDemandLoops[F]..F=ok,T=fail
> ** ~~~ ** HVAC Tolerance Flags=[1000011] 
> Enthalpy[1],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[1],Temp[1]..0=ok,1=fail
> ** ~~~ ** HVAC Tolerance Values, Most Recent listed first
> ** ~~~ ** HVAC EnthalpyTol=1677.584, MassFlowTol=0.000, 
> HumRatTol=8.5924E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=805987.293, TempTol=1.67
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1677.584, MassFlowTol=0.000, 
> HumRatTol=8.5924E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=805987.293, TempTol=1.67
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1681.996, MassFlowTol=0.000, 
> HumRatTol=8.6150E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=808106.990, TempTol=1.67
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1681.996, MassFlowTol=0.000, 
> HumRatTol=8.6150E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=808106.990, TempTol=1.67
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1686.419, MassFlowTol=0.000, 
> HumRatTol=8.6376E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=810232.262, TempTol=1.67
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** Plant Tolerance Flags=[00000000] 
> Enthalpy[0],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[0],Temp[0],PlantFlowMassFlow[0]..0=ok,1=fail
> ** ~~~ ** Plant Tolerance Values, Most Recent listed first
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[262 - HWLFORFANCOILS HW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[285 - CHILLER1 CHW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[257 - HWLFORFANCOILS HW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant Flow Tolerance Values, Most Recent listed first
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=203.720
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC 
> loops, at NEXTDAYSIM, 04/01 18:00 - 18:01
> ** ~~~ ** SimFlags=[TFFFFFFF] 
> AirLoops[T],ZoneEq[F],NonZoneEq[F],PlantLoops[F],CondLoops[F],ElecCircuits[F],PlantDemandLoops[F],CondDemandLoops[F]..F=ok,T=fail
> ** ~~~ ** HVAC Tolerance Flags=[1000011] 
> Enthalpy[1],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[1],Temp[1]..0=ok,1=fail
> ** ~~~ ** HVAC Tolerance Values, Most Recent listed first
> ** ~~~ ** HVAC EnthalpyTol=1664.041, MassFlowTol=0.000, 
> HumRatTol=6.2533E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=799499.376, TempTol=1.65
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1664.041, MassFlowTol=0.000, 
> HumRatTol=6.2533E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=799499.376, TempTol=1.65
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1668.417, MassFlowTol=0.000, 
> HumRatTol=6.2698E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=801601.941, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1668.417, MassFlowTol=0.000, 
> HumRatTol=6.2698E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=801601.941, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1672.805, MassFlowTol=0.000, 
> HumRatTol=6.2862E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=803710.036, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** Plant Tolerance Flags=[00000000] 
> Enthalpy[0],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[0],Temp[0],PlantFlowMassFlow[0]..0=ok,1=fail
> ** ~~~ ** Plant Tolerance Values, Most Recent listed first
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[262 - HWLFORFANCOILS HW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[285 - CHILLER1 CHW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[257 - HWLFORFANCOILS HW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant Flow Tolerance Values, Most Recent listed first
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=203.720
> ** Warning ** SimHVAC: Maximum iterations (20) exceeded for all HVAC 
> loops, at NEXTDAYSIM, 04/01 18:01 - 18:02
> ** ~~~ ** SimFlags=[TFFFFFFF] 
> AirLoops[T],ZoneEq[F],NonZoneEq[F],PlantLoops[F],CondLoops[F],ElecCircuits[F],PlantDemandLoops[F],CondDemandLoops[F]..F=ok,T=fail
> ** ~~~ ** HVAC Tolerance Flags=[1000011] 
> Enthalpy[1],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[1],Temp[1]..0=ok,1=fail
> ** ~~~ ** HVAC Tolerance Values, Most Recent listed first
> ** ~~~ ** HVAC EnthalpyTol=1663.649, MassFlowTol=0.000, 
> HumRatTol=4.5510E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=799325.284, TempTol=1.65
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1663.649, MassFlowTol=0.000, 
> HumRatTol=4.5510E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=799325.284, TempTol=1.65
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1668.024, MassFlowTol=0.000, 
> HumRatTol=4.5630E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=801427.341, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1668.024, MassFlowTol=0.000, 
> HumRatTol=4.5630E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=801427.341, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[1 - AHU SYS 1 OUTLET NODE]
> ** ~~~ ** HVAC EnthalpyTol=1672.410, MassFlowTol=0.000, 
> HumRatTol=4.5750E-008, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=803534.926, TempTol=1.66
> ** ~~~ ** HVAC side outlet node=[425 - ZONE EQUIPMENT OUTLET NODE]
> ** ~~~ ** Plant Tolerance Flags=[00000000] 
> Enthalpy[0],MassFlow[0],HumRat[0],Pressure[0],FlowQual[0],Energy[0],Temp[0],PlantFlowMassFlow[0]..0=ok,1=fail
> ** ~~~ ** Plant Tolerance Values, Most Recent listed first
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[262 - HWLFORFANCOILS HW DEMAND OUTLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[285 - CHILLER1 CHW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[257 - HWLFORFANCOILS HW DEMAND INLET]
> ** ~~~ ** Plant EnthalpyTol=0.000, MassFlowTol=0.000, 
> HumRatTol=0.0000, PressureTol=0
> ** ~~~ ** FlowQualTol=0.00, EnergyTol=0.000, TempTol=0.00
> ** ~~~ ** Plant side outlet node=[290 - CHILLER1 CHW DEMAND OUTLET]
> ** ~~~ ** Plant Flow Tolerance Values, Most Recent listed first
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=203.720
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
> ** ~~~ ** PlantFlowFlowTol=0.000
>
> 

-- 
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL  32922-5703
Phone:   (321) 638-1454
Fax:     (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu

UCF - From Promise to Prominence: Celebrating 40 Years



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