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EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumption and water use in buildings.
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Chiller:Absorption condenser flow rate sizing has been corrected to prevent a negative autosized flow rate due to uninitialized pump power. (CR #9385) #4156

Closed axelstudios closed 10 years ago

axelstudios commented 10 years ago

Chiller:Absorption condenser flow rate sizing is not correct.

Assigned to: Daeho Kang
Added on 2013-11-13 12:22 by Brent Griffith

Description

Defect file shows a design condenser vol flow rate that is negative.

Component Sizing Information, Chiller:Absorption, BIG CHILLER, Design Condenser Water Flow Rate [m3/s], -1.64080E-003

This cannot be.

find problem is that tmpNomPumpPower still has -9999 when it gets to 

    tmpCondVolFlowRate = tmpNomCap * &
                (1.0d0 + SteamInputRatNom + tmpNomPumpPower/tmpNomCap) / &
                ( PlantSizData(PltSizCondNum)%DeltaT * Cp * rho )

Need to fill tmpNomPumpPower value at line 1101 in PlantAbsorptionChillers.f90

defect file: 9385_in.idf condenser flow rate should not be zero.

[BG 11-13-2013] checked in fix.

Addressed in 13.11.20 V8.1.0.009 - rerelease by Brent Griffith Last build tested: 13.10.18 V8.1.0.008

BobHenninger commented 10 years ago

Ran test file with v8.1.0.009 and condenser flow rate is not negative but is a positive number as shown below with outout from eio file

Component Sizing Information, Chiller:Absorption, BIG CHILLER, Design Condenser Water Flow Rate [m3/s], 2.63756E-003

This issue is FIXED.