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Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=r64), | intent(in) | :: | PartLoadRatio | |||
real(kind=r64), | intent(in), | optional | DIMENSION(:) | :: | Par |
Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed arrows point from an interface to procedures which implement that interface. This could include the module procedures in a generic interface or the implementation in a submodule of an interface in a parent module. Where possible, edges connecting nodes are given different colours to make them easier to distinguish in large graphs.
FUNCTION CoolWaterTempResidual(PartLoadRatio, Par) RESULT (Residuum)
! FUNCTION INFORMATION:
! AUTHOR Chandan Sharma, FSEC
! DATE WRITTEN January 2013
! MODIFIED
! RE-ENGINEERED
! PURPOSE OF THIS FUNCTION:
! Calculates residual function (desired outlet temp - actual outlet temp)
! Cool water coil output depends on the part load ratio which is being varied to zero the residual.
! METHODOLOGY EMPLOYED:
! Calls SimulateWaterCoilComponents to get outlet temp at the given cycling ratio
! and calculates the residual as defined above
! REFERENCES:
! USE STATEMENTS:
USE WaterCoils, ONLY: SimulateWaterCoilComponents
IMPLICIT NONE ! Enforce explicit typing of all variables in this routine
! SUBROUTINE ARGUMENT DEFINITIONS:
REAL(r64), INTENT(IN) :: PartLoadRatio ! compressor cycling ratio (1.0 is continuous, 0.0 is off)
REAL(r64), INTENT(IN), DIMENSION(:), OPTIONAL :: Par ! par(1) = CoolWater coil number
! par(2) = desired air outlet humidity ratio [kg/kg]
! par(5) = supply air fan operating mode (ContFanCycCoil)
REAL(r64) :: Residuum ! residual to be minimized to zero
! FUNCTION PARAMETER DEFINITIONS:
! na
! INTERFACE BLOCK SPECIFICATIONS
! na
! DERIVED TYPE DEFINITIONS
! na
! FUNCTION LOCAL VARIABLE DECLARATIONS:
INTEGER :: UnitarySysNum ! index of this coil
REAL(r64) :: OutletAirTemp ! outlet air humidity ratio [kg/kg]
REAL(r64) :: mdot
LOGICAL :: FirstHVACIteration
UnitarySysNum = INT(Par(1))
IF (Par(2) > 0.0d0) THEN
FirstHVACIteration = .TRUE.
ELSE
FirstHVACIteration = .FALSE.
END IF
mdot = MIN(Node(UnitarySystem(UnitarySysNum)%CoolCoilFluidOutletNodeNum)%MassFlowRateMaxAvail, &
UnitarySystem(UnitarySysNum)%MaxCoolCoilFluidFlow * PartLoadRatio)
Node(UnitarySystem(UnitarySysNum)%CoolCoilFluidInletNode)%MassFlowRate = mdot
CALL SimulateWaterCoilComponents(UnitarySystem(UnitarySysNum)%CoolingCoilName,FirstHVACIteration, &
UnitarySystem(UnitarySysNum)%CoolingCoilIndex, &
PartLoadRatio = PartLoadRatio)
OutletAirTemp = Node(UnitarySystem(UnitarySysNum)%CoolCoilOutletNodeNum)%Temp
Residuum = Par(3) - OutletAirTemp
RETURN
END FUNCTION CoolWaterTempResidual