Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=r64), | intent(in) | :: | DeltaTemp | |||
real(kind=r64), | intent(in) | :: | HydraulicDiameter |
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FUNCTION CalcAwbiHattonHeatedWall(DeltaTemp, HydraulicDiameter) RESULT (Hc)
! FUNCTION INFORMATION:
! AUTHOR Brent Griffith
! DATE WRITTEN Jul 2010
! MODIFIED na
! RE-ENGINEERED na
! PURPOSE OF THIS FUNCTION:
! Calculate model equation for Awbi and Hatton for heated walls
! METHODOLOGY EMPLOYED:
! isolate function for equation.
! REFERENCES:
! Awbi, H.B. and A. Hatton. 1999. Natural convection from heated room surfaces.
! Energy and Buildings 30 (1999) 233-244.
! This function is for equation 12 in the reference
! USE STATEMENTS:
! na
IMPLICIT NONE ! Enforce explicit typing of all variables in this routine
! FUNCTION ARGUMENT DEFINITIONS:
REAL(r64), INTENT(IN) :: DeltaTemp ! [C] temperature difference between surface and air
REAL(r64), INTENT(IN) :: HydraulicDiameter ! [m] characteristic size, = (4 * area) / perimeter
REAL(r64) :: Hc ! function result
! FUNCTION PARAMETER DEFINITIONS:
! na
! INTERFACE BLOCK SPECIFICATIONS:
! na
! DERIVED TYPE DEFINITIONS:
! na
! FUNCTION LOCAL VARIABLE DECLARATIONS:
IF (HydraulicDiameter > 1.d0) THEN
Hc = 1.823d0*((ABS(DeltaTemp))**0.293d0)/ (HydraulicDiameter**0.121d0)
ELSE
Hc = 1.823d0*((ABS(DeltaTemp))**0.293d0)/ (1.d0**0.121d0)
ENDIF
RETURN
END FUNCTION CalcAwbiHattonHeatedWall