A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...
A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...
A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...
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CCREC = CREC,REF ( A ~ L F ) XRBC<br />
where CREC,REF = cost of a reference design (dollars)<br />
AREC,REF = heat transfer area of the reference design<br />
AREC = heat transfer area of the receiver being evaluated<br />
XREC = scaling exponent <strong>for</strong> receivers, 51.0<br />
Default values are based on the scaling exponent commonly used <strong>for</strong> heat ex-<br />
changers and on a cavity salt receiver design (Reference 8):<br />
CREC,REF (CRECl) = $23.0 x loG<br />
AREC,REF (ARECRF) = 758.0 m2<br />
XREC (XREC) = 0.8<br />
(V.A - 7)<br />
a) External and Flat Plate Receivers-The area AREC is simply the <strong>prod</strong>uct<br />
of ?F times the diameter (W) times the height (H) <strong>for</strong> an external receiver.<br />
For a flat plate receiver the area is RXx RY.<br />
b) Cavitv Receivers-The bottom of the heat absorbing surface is calculated<br />
by DELSOL (<strong>for</strong> costing purposes) so that at the given cavity depth, W/2<br />
x RWCAV, a ray entering the bottom of the aperture from the farthest<br />
heliostat will strike the heat absorbing surface.<br />
HBOT =(THT - RY/2 x sin(l80 - RELV))<br />
RMAX - W/2 + W/2 x RWCAV<br />
(RMAX - W/2 + RY/2 x cos(l80 - RELV)<br />
(V.A - 8)<br />
where RMIN and RMAX are the local minimum and maximum radii <strong>for</strong><br />
the optimized heliostat field.<br />
The height of the heat absorbing surface is specified in one of three ways.<br />
If the default value of the variable H is used, the heat absorbing surface<br />
height will be specified as l.lxRY (1.1 times the aperture height). If a<br />
different value H is specified, then that value is taken to be the actual<br />
height of the heat absorbing surface. However, the height will never be<br />
allowed to be larger than that height needed to intercept a ray from the<br />
nearest heliostat entering the top of the aperture, as shown in Figure V-2a<br />
and described as<br />
HTOP =(THT + RY/2 x sin(l80 - RELV))<br />
RMIN - W/2 + W/2 x RWCAV<br />
(RMIN - W/2 + RY/2 x cos(l80 - RELV)<br />
124<br />
(V.A - 9)<br />
c