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

SamDle Problem 2b - ODtimization of a Multi-ADerture Cavitv Size
Problem Statement
Using the system optimized in Sample Problem 2a for cavity depth, optimize
aperture dimensions, and then determine annual system performance and energy
output. Flux on the receiver wall should be limited to 0.6 MW/m2.
Input Cards
SAMPLE PROBLEM 213
$BASIC ITAPE-2 B
PREC IREC=2. THT-180.. W=30.. IAUTOP-2. NUMCAV=4.
RX=18.0.14.4,10.8.14.4. RY=18.0.14.4.10.8,14.4.
RWCAV=1.0.0.75.0.5.0.75 $
$OPT NUMTHT=4. THTST=160.. THTEN0=220.. NUMREC=5. WST=14.. WENOz22..
NUMHTW-4. HTWST-0.75. HTWENO=1.5.
NUMOPT=I. POPTMN=125.€+06, POPTMX=125.€+06, IPLFL=I. IOTAPE=l.
IRERUN=1, ISTR=2. NSTR=11 $
$NL.FLUX IFLX=I. NXFLX=5, FAZMINz90.. FAZMAX=270.. NYFLX=4, FZMIN=-7.08.
FZMAX=12.72. NFLXMX=4. NMXFLX=3.8.13.18. FLXLIM=4*0.6€+06 ’%
$NLEFF 3
BNICOST CREC1=4.735E+06. ARECRF=1749. $
$NLECON $
PERFORMANCE RERUN
$BASIC ITAPE=3. TOESP=125..
$FIELO $
SHSTAT 3
BREC f
IPROB=O $
$NLFLUX IFLX=I. IFXOUT(3.1)=1 $
$NLEFF $
$REC W=-100. 3
Analysis of Input
As in Problem 2a, the performance data created in Problem la will suffice
for initial performance input (ITAPE=2 in $BASIC$). The user must input on
Namelist $REC$ the dimensions which were optimized in Problem 2a, specifically
W. Values of THT, RX, and RY which are specified will not affect the system,
since these variables are being optimized in this run. However, the parameters in
$NLFLUX$ must be consistent with these values as defined in order to locate the
flux map points in the correct positions. Also, a smart user would probably nar-
row the range being optimized over for tower height and aperture width, based
on the results from Sample Problem 2a. The aperture size variation is specified
by selecting NUMHTW values of the first aperture height to width ratio from
HTWST to HTWEND and by using the default value for IOPTUM. The other
three apertures will be sized by the same ratio and by the relative size with re-
spect to the first aperture given by RX2TRX, RXSTRX, and RX4TRX, or as
defined by RX and RY values in $REC$ as done in this example. These should
be kept the same as in Problem 2a. To save the optimization results on a file,
the IOTAPE=l option is used. The storage optimization is flagged in Namelist
$OPT$ (ISTR, NSTR) to look at 11 storage sizes varying from twice that for
the longest day to no storage. The actual optimization is not done until a final
performance calculation. In this case, that calculation is part of the same job be-
cause IRERUN=l is specified. Again, the four flux points along the centerline of
the north cavity wall are tested for flux limits.
213