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

e) INSOL = 4. Moon Model (Reference 22)
S =SO (0.183 exp(-mxDPRES/0.48)
+ 0.715 exp(-mxDPRES/4.15) + 0.102)
(lII.B - 14)
The above equations are plotted in Figure 111-1 for ALT=O. The default val-
ues give yearly insolation predictions corresponding to a Barstow, CA, location
(Reference 24) :
INSOL = 0
ALT = 0.65
DPRES = PRES = 1.0
DH20(I) = H20 = 20.0
111.B-9. Time Dependent Weather Efects-DELSOL allows the user to define
the weather characteristics of the site being analyzed. The weather factors can
be defined separately for each of the NYEAR calculational days (IWEATH=l,
Namelist BASIC) or can be held constant over the year (IWEATH=O, 2). The
weather affects both performance and design calculations.
a) Cloudiness
The energy produced on the Ith calculational day is multiplied by
DWEATH(1) (IWEATH-1) or WEATH (IWEATH=O, 2) to correct for the prob-
ability that some insolation will be lost due to cloudiness. If IWEATH=2, the
variable WEATH is defined based on the reference latitude (PLAT in Namelist
BASIC) as
WEATH = 2.16255 exp(-O.O2804xPLAT)
The default values are set for a Barstow, CA location:
IWEATH=O
DWEATH(1) = WEATH = 0.83
b) Atmospheric Pressure
The atmospheric pressure divided by sea level atmospheric pressure on the Ith
calculational day is given by DPRES(1) (IWEATH=l) or PRES (IWEATH=O, 2).
The relative atmospheric pressure affects the refraction of sunlight in the atmo-
sphere, and its influence is accounted for in the Allen and Moon insolation mod-
els.
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