A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...

WEATH
D w EATH( I)
(I=1,NY EAR)
H20
DH20(I)
PRES
DPRES(1)
(I= 1 ,NY EAR)
NSIJN
NSUNPT
SUNI(1)
SUNR(1)
(I= 1 ,NSUNPT)
REFDAY
Fraction of energy calculated from the clear sky insolation
models when INSOL = 0, 1, 2 that is actually produced due
to weather effects. WEATH is the uniform correction for
cloudiness on an annual basis (IWEATH = 0, 2); DWEATH(1 is
the individual correction for cloudiness to the Ith calculationa I day.
Default: WEATH = 0.83
DWEATH = 9'0.83 (1II.B-3)
Site specific atmospheric conditions. H20 is the constant
mm of precipitable water in the atmosphere (IWEATH=O).
DHPO(1) is the individual mm of preci itable water on
the Ith calculational day (IWEATH=ly. PRES is the constant
relative atmospheric pressure compared to sea level,
760 mm of Hg (IWEATH=O). DPRES(1) is the relative atmospheric
pressure on the Ith day (IWEATH=l).
Defarilt: H20 = DH20(1) = 20.0
PRES = 1.0
IIPRES(J) 7 1.0 ( I1 I. B- 1 ,I 11. B-2, I I I. B-3)
Control parameter specifying sunshape model:
= 0, point sun (unrealistic, but useful for debugging);
= 1, limb darkened sun, U. of Houston form;
= 2, square wave sun;
- 3, user defined sunshape through variables NSUNPT,
SUNI, SUNR.
Default: NSUN = 1 (1II.B-4)
Variable for defining sunshape: NSUNPT is number of pairs
of points of sun intensity, SUNI (arbitrar units) vs.
angle from the center of the sun, SUNR (Yradians).
Points do not have to be equally spaced.
Constraints: NSUN = 3
NSUNPT 5 50
Points start at center of sun; i.e.,
SUNR( 1) = 0. Points decrease monotonically
with increasing radius.
Default: None. (1II.B-4)
Day of the year chosen for the design point; day 1 is
January 1st. REFDAY
= UDAY if IPROB = 1 or 2 (automatically set by code);
= 354.75, winter solstice (- Dec. 21);
= 81.0, equinox (Mar. 21);
= 172.25, summer solstice (-June 21).
Constraint: REFDAY must occur on one of the days
determined by NYEAR if IPROB = 0 or 4.
Default: REFDAY = 81.0 (1II.A-5 ,V.C- 1)
177