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

APPENDIX A-INPUT CARDS
The input to DELSOL is accomplished through the use of namelists. Namelists
are a convenient form of input because any format can be used for the input vari-
ables, the variables can be specified in any order and the only variables that need
to be input are those which differ from the default values. However, each namelist
must be input in the order shown in Tables A-1 and A-2, even if no variables in a
namelist are redefined. The namelists are grouped into similar types of variables
(e.g., Namelist HSTAT contains all of the heliostat definition inputs).
There are two types of problems that are run on DELSOL: performance cal-
culations and design optimization calculations. In a performance calculation the
user defines a single system and DELSOL calculates the optical performance for
that system at a single time or day and/or on an annual basis. In a design opti-
mization calculation the user specifies the heliostat, receiver geometry, and range
of all the optimization variables and DELSOL searches for the set of optimization
variables that minimizes the energy cost. In the design search DELSOL analytically
"scales" the results of an initial performance calculation. These initial performance
results can be generated in the same computer run as the design optimization or
can be read off a file that was generated during a previous computer run. Finally,
the results of the design optimization can be automatically used as input to a de-
tailed performance run or can be written on a file for subsequent calculations or for
plotting.
The input cards for a performance calculation are listed in Table A-1. The first
card is a title card. The six namelists that follow specify the system to be analyzed.
If the user wants to read in the coordinates of the heliostats instead of specifying
zones of heliostats, these data cards follow the NLEFF namelist. Finally, the REC
namelist with W=-100 terminates the problem. This arrangement of input cards
should be used for either a user specified system or for a performance rerun of a
system previously optimized by DELSOL and stored on a file on Unit 30.
The input cards for a design optimization calculation are shown in Table A-2.
The first card is the title card. The next six namelists (BASIC .... NLEFF) define the
initial performance calculation. The values on these cards fix the zoning, latitude,
insolation model, heliostat design and heliostat focusing/canting strategy to be
used during the optimization. If these values will be used again in another design
optimization calculation, the results should be saved. To do this, set ITAPE=l in
Namelist BASIC and store the local file generated on Unit 10 as a permanent file.
When this initial performance calculation is to be used in a subsequent design run,
attach a copy of the stored data to DELSOL as a local file on Unit 20, set ITAPE=2
in Namelist BASIC and omit the FIELD, HSTAT, REC, NLFLUX, and NLEFF
namelists that follow the BASIC namelist. The REC, OPT, NLFLUX, NLEFF,
NLCOST, and NLECON namelists define the optimization values. If a detailed
performance calculation of the optimized design is required, set IRERUN=l in
Namelist OPT and provide the six namelists after the NLECON namelist as shown
in Table A-2. Usually it is not necessary to redefine any variables in these namelists
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