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

a) Surround Field (INORTH=O)
The field points are located on a regularly spaced radial-azimuthal grid sur-
rounding the tower as shown in Figure 11-3. There are NRAD values of the ra-
dius from a minimum of RADMIN to a maximum of RADMAX (RADMIN and
RADMAX are in normalized units of tower height). There are NAZM values of
the azimuthal angle with the first azimuthal value being due North. The total
number of field points (and therefore zones) is NRAD x NAZM. The field point
is in the center of the zone except at the inner and outer radial boundaries where
it is at the boundary.
Heliostafs are located by specifying the value of the radius and the azimuthal
angle of the tower vector t*. q5t = 0 corresponds to a heliostat due North of the
tower whose t* points due South. Similarly,
Angle & Location
0 N
45 NE
90 E
135 SE
180 S
225 sw
270 w
315 NW
b) North Field (INORTH-1)
This option can be used only with a single north facing cavity or flat plate
receiver. This is specified in namelist REC by setting IREC>O, NUMCAV=l,
and RAZM(1)=180.0. The field points are located on a regularly spaced radial-
azimuthal grid located north of the tower, as illustrated in Figure TT-5. In addi-
tion, a “dummy” set of zones with field points due south of the tower is carried
along. These southerly zones do not affect the calculations because they are au-
tomatically assigned zero intercept with north-facing receivers. The radial zoning
is the same as that for the surround field (INORTH=O). The azimuthal zones
utilized are NAZM-1 in number and extend f AMAXN degrees about the N-
S axis. The default values produce 11 azimuthal zones each spanning 15” in the
north part of the field. This gives half of the default 30” segment obtained when
INORTH=O. Default values are:
31