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Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=r64), | intent(in) | :: | PartLoadFrac | |||
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 SteamHeatingCoilResidual(PartLoadFrac, Par) RESULT (Residuum)
! FUNCTION INFORMATION:
! AUTHOR Chandan Sharma, FSEC
! DATE WRITTEN February 2013
! MODIFIED
! RE-ENGINEERED
! PURPOSE OF THIS FUNCTION:
! Calculates residual function (desired outlet temp - actual outlet temp)
! hot Steam Coil output depends on the part load ratio which is being varied to zero the residual.
! METHODOLOGY EMPLOYED:
! Calls SimulateSteamCoilComponents to get outlet temperature at the given part load ratio
! and calculates the residual as defined above
! REFERENCES:
! USE STATEMENTS:
USE SteamCoils, ONLY: SimulateSteamCoilComponents
IMPLICIT NONE ! Enforce explicit typing of all variables in this routine
! SUBROUTINE ARGUMENT DEFINITIONS:
REAL(r64), INTENT(IN) :: PartLoadFrac ! Compressor cycling ratio (1.0 is continuous, 0.0 is off)
REAL(r64), INTENT(IN), DIMENSION(:), OPTIONAL :: Par ! Par(1) = DX coil number
! Par(2) = desired air outlet temperature [C]
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:
REAL(r64) :: OutletAirTemp ! Outlet air temperature [C]
REAL(r64) :: mdot
INTEGER :: UnitarySysNum
LOGICAL :: FirstHVACIteration
LOGICAL :: SuppHeatingCoilFlag
UnitarySysNum = INT(Par(1))
IF (Par(2) > 0.0d0) THEN
FirstHVACIteration = .TRUE.
ELSE
FirstHVACIteration = .FALSE.
END IF
IF (Par(4) > 0.0d0) THEN
SuppHeatingCoilFlag = .TRUE.
ELSE
SuppHeatingCoilFlag = .FALSE.
END IF
IF (.NOT. SuppHeatingCoilFlag) THEN
mdot = MIN(Node(UnitarySystem(UnitarySysNum)%HeatCoilFluidOutletNodeNum)%MassFlowRateMaxAvail, &
UnitarySystem(UnitarySysNum)%MaxHeatCoilFluidFlow * PartLoadFrac)
Node(UnitarySystem(UnitarySysNum)%HeatCoilFluidInletNode)%MassFlowRate = mdot
CALL SimulateSteamCoilComponents(UnitarySystem(UnitarySysNum)%HeatingCoilName, FirstHVACIteration, &
1.0d0, &
UnitarySystem(UnitarySysNum)%HeatingCoilIndex, &
FanOpMode = UnitarySystem(UnitarySysNum)%FanOpMode, &
PartLoadRatio = PartLoadFrac)
ELSE
mdot = MIN(Node(UnitarySystem(UnitarySysNum)%SuppCoilFluidOutletNodeNum)%MassFlowRateMaxAvail, &
UnitarySystem(UnitarySysNum)%MaxSuppCoilFluidFlow * PartLoadFrac)
Node(UnitarySystem(UnitarySysNum)%SuppCoilFluidInletNode)%MassFlowRate = mdot
CALL SimulateSteamCoilComponents(UnitarySystem(UnitarySysNum)%SuppHeatCoilName, FirstHVACIteration, &
1.0d0, &
UnitarySystem(UnitarySysNum)%SuppHeatCoilIndex, &
FanOpMode = UnitarySystem(UnitarySysNum)%FanOpMode, &
PartLoadRatio = PartLoadFrac)
END IF
OutletAirTemp = Node(UnitarySystem(UnitarySysNum)%HeatCoilOutletNodeNum)%Temp
Residuum = Par(3) - OutletAirTemp
RETURN
END FUNCTION SteamHeatingCoilResidual