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

For optimizing cavity depth, the IOPTUM=2 option is specified. NUMREC,
WST, and WEND refer to the width of the first aperture (in this case, the north
aperture). NUMHTW, HTWST, and HTWEND define the width of the receiver
and therefore the depth of the cavities. The aperture dimensions will have the
fixed ratios RYTRX, RX2TRX, RXSTRX, and RX4TRX as the north aperture
width is varied. Other input variables in $OPT$ are analogous to those in Sample
Problem la.
Testing for flux limits on a cavity wall requires some care with the input data.
The bottom of the wall is calculated and input as described in Section V.A-5.
The default height (since H was not specified in Namelist $REC$) is H=l.lxRY.
The maximum angle active for the north cavity sets the width of the flux surface
(FAZMIN, FAZMAX). A 20 point grid is set up covering the active wall area of
the north cavity, and the 4 points along the centerline (NMXFLX) are checked for
a flux limit of 0.6 MW/m2. The flux map is initially referenced to the values in
$REC$, and is scaled in the optimization search so that the same relative part of
the cavity wall is covered by the flux map.
Parameters for the reference receiver cost (CRECl and ARECRF in
$NLCOST$) are provided to illustrate that receiver cost may be user defined
based on the user’s previous experience.
Comments on Output
The Namelist $BASIC$ is printed in the output, followed by a code generated
list ($FMTP$) of the data read from the file on Unit 20. The heliostat design is
summarized as in Sample Problem la, but no initial performance data is printed.
The optimization namelists are printed, a summary of the optimization parame-
ters is given, and a limited summary of the optimization search is printed.
The design summary tables are similar to those of Sample Problem la, ex-
cept they are modified for the appropriate output cavity dimensions and include a
summary of the cavity design. The height of the cavity wall is still determined by
the new choice for aperture height (H=l.lxRY).
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