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CCREC = CREC,REF ( A ~ L F ) XRBC where CREC,REF = cost of a reference design (dollars) AREC,REF = heat transfer area of the reference design AREC = heat transfer area of the receiver being evaluated XREC = scaling exponent for receivers, 51.0 Default values are based on the scaling exponent commonly used for heat ex- changers and on a cavity salt receiver design (Reference 8): CREC,REF (CRECl) = $23.0 x loG AREC,REF (ARECRF) = 758.0 m2 XREC (XREC) = 0.8 (V.A - 7) a) External and Flat Plate Receivers-The area AREC is simply the product of ?F times the diameter (W) times the height (H) for an external receiver. For a flat plate receiver the area is RXx RY. b) Cavitv Receivers-The bottom of the heat absorbing surface is calculated by DELSOL (for costing purposes) so that at the given cavity depth, W/2 x RWCAV, a ray entering the bottom of the aperture from the farthest heliostat will strike the heat absorbing surface. HBOT =(THT - RY/2 x sin(l80 - RELV)) RMAX - W/2 + W/2 x RWCAV (RMAX - W/2 + RY/2 x cos(l80 - RELV) (V.A - 8) where RMIN and RMAX are the local minimum and maximum radii for the optimized heliostat field. The height of the heat absorbing surface is specified in one of three ways. If the default value of the variable H is used, the heat absorbing surface height will be specified as l.lxRY (1.1 times the aperture height). If a different value H is specified, then that value is taken to be the actual height of the heat absorbing surface. However, the height will never be allowed to be larger than that height needed to intercept a ray from the nearest heliostat entering the top of the aperture, as shown in Figure V-2a and described as HTOP =(THT + RY/2 x sin(l80 - RELV)) RMIN - W/2 + W/2 x RWCAV (RMIN - W/2 + RY/2 x cos(l80 - RELV) 124 (V.A - 9) c
w/2 x RWCAV W/2 x RWCAV IN (180. - RELV) RMlN RMAX %-TOWER CENTERLINE ACTIVE HEAT TRANSFER AREA Figure V-2. a) Schematic illustrating the relationship of the height of the back wall of a cavity to other system dimensions; b) Assumed shape of the heat transfer surface in a cavity
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- SANDIA REPORT SAND86-8018 Unlimit
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SAND 86-8018 Unlimited Release Prin
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' The computer code which this repo
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I. Introduction CONTENTS A. Differe
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1. More Accurate Images from Canted
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VII. Comparison of DELSOL, MIRVAL,
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111-1 Insolation Models 111-2 Atmos
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A USER’S MANUAL FOR DELSOLS: A CO
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owing, blocking, atmospheric attenu
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The fourth major enhancement in DEL
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W- 26 S ? Jr RECEIVER NORMAL COORDI
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ZONE FlEL 180" Figure 11-3. Surroun
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30 ZONE 60 Figure 11-4. Method of Z
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Figure 11-5. North-only Field (INOR
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34 N' Figure 11-6. Code Defined Fie
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36 Figure 11-7. Schematic Diagram o
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-SLEW (1)- Figure 11-8. Example of
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Figure 11-9. Radial Stagger Arrange
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Note that when IDENS=l or 2 the azi
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J1.D. Heliostats Either rectangular
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Given that heliostats will be mass
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(A) FLAT REFLECTED RAY FROM (B) FOC
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IROUND = 0 WM = 9.91 (m) HM = 9.93
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That is, the aperture is always loc
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controlled by the IAUTOP parameter
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only be used with rectangular cavit
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grid of points on the DELSOL assume
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W E Figure 11-17. Flux Points on a
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flux point grid defined during syst
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To see whether this problem is occu
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Cal cul ati onal Day 1 2 3 4 5 Tabl
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1II.B-I. Position 01 the Sun-The su
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where SO is given by Equation (1II.
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c 0 w V c LL .r a 0 0 0 0 0 s /s 0
Page 74 and 75: 1II.C. Field Performance Calculatio
Page 76 and 77: 1II.F. Flux Density and SDillane Th
Page 78 and 79: III. G-1. Atmospheric Attenuation:
Page 80 and 81: eceiver) or with aperture area (cav
Page 82 and 83: In other words, PLOST,R is the same
Page 84 and 85: Following the approach in the previ
Page 86 and 87: 86 - - - LLLLLL www CLee o m 4 I i
Page 88 and 89: This approximate method of calculat
Page 90 and 91: RECEIVER STARTUP WEATHER SUN PARASI
Page 92 and 93: 111.1. Relationship Between Perform
Page 95 and 96: IV. System Optimization Calculation
Page 97 and 98: power and annual energy. Section 11
Page 99 and 100: , . IV.A-7. Calculation of Annual E
Page 101 and 102: . production. When each design powe
Page 103 and 104: large enough fraction of total capi
Page 105 and 106: _____ Table IV-2. Design Parameters
Page 107 and 108: DELSOL will examine NUMHTW (520) eq
Page 109 and 110: The final step of cavity receiver o
Page 111 and 112: . furthermore, that the assumed tur
Page 113 and 114: point in the NMXFLX(1) array (I=l,
Page 115 and 116: , flux level. DELSOL determines the
Page 117 and 118: optimum for any power level is 13.
Page 119 and 120: I V. System Costs and Economics Whi
Page 121 and 122: for meteorological equipment. The d
Page 123: 0 co I I I 0 co J 0 c\! c, 0 3 Ln 0
Page 127 and 128: S M ~ , = ~ solar F multiple for re
Page 129 and 130: nSTOR is determined from an assumed
Page 131 and 132: CTK,REF (CSTREF) = $9.70 x loG VTK,
Page 133 and 134: XHE,A = scaling exponent. ni is cal
Page 135 and 136: . CCFIXED = 2.OE6 +'0.14 x DCC + 0.
Page 137 and 138: (V.B - 6) The discount rate rDIS is
Page 139 and 140: VI. Program Flow DELSOL can be used
Page 141 and 142: .I c to reach a certain design powe
Page 143 and 144: an optimum storage size based on en
Page 145 and 146: I Read i n N + K t x ] ITAPE=O or 1
Page 147 and 148: Read in System Definition from File
Page 149 and 150: . TABLE VI-2 OUTPIJT FROM OPTIMIZAT
Page 151 and 152: ) Power level specific for detailed
Page 153 and 154: V1.B. DescriDtion of Subroutines in
Page 155 and 156: C cy c: C C
Page 157 and 158: L C c C c C c: C c C C c C C C c: c
Page 159: C C C C C C C C C C C C C C C C C C
Page 162 and 163: At the time of the comparisons MIRV
Page 164 and 165: 164 n m W * ? 0 F F 0 ( z W /M W) X
Page 166 and 167: 166 Phase 1; CDRL Item 2, Pilot Pla
Page 168 and 169: 168 43. Vittitoe, C. N. et al., “
Page 170 and 171: since the values have been already
Page 172 and 173: Title Card $BASIC$ $FIELD$ $HSTAT$
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IPROB NYEAR HRDEL UDAY UTIME NUAZ N
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TDESP PLAT ALT INSOL SOLCON IWEATH
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REFTIM REFSOL ASTART IATM ATMl ATM2
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IHPR NLAND XTOWER YTOWER (I= 1 ,NLA
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182 1 1-40 2 1-10 11-20 3 1-10 11-2
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SIGTX SIGTY ICANT NCANTX NCANTY HCA
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THT TOWL TOWD IREC W H RRECL IAUTOP
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For cavities or flat plates, the fo
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NXFLX FAZMIN FAZMAX 190 AZMF (North
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NMXFLXY) identifies the exact point
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REFPRL FSP FEP EFFSTR PF SMULT IP H
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IHOPT NUMTHT THTST THTEND NUMREC WS
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SMULT IPLFL(1) (I=l ,NUMOPT) IPROPT
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CH CL CWR CWDR CWDA ITHT CTOWl CTOW
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ICHE CHEREF PHEREF XHEP APHREF PPHR
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CKNREF PKNREF XKN 204 Sodium-to-sal
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TC TR FDEBT RDEBT ROE IDEP NDEP NYO
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The next set of cards is read at th
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value of insolation from the specif
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For optimizing cavity depth, the IO
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For the final detailed performance
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from that specified during the opti
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Sample Problem 4 - User Defined Fie
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GLOSSARY Absorber: The portion of t
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Heat Exchanger: A component in whic
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Receiver System Efficiency: The rat
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Variable AEVMAX AEVREF AFDC ALP(I)
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Variable H H20 HCANT HM HPANL HRDEL
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Variable PARL7,PARLI) PARL9,PARLlO
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Variable W WEATH WEND WM WPANL WST
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Analysis Review and Critique 6503 8
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Martin Marietta Aerospace P.O. Box
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Stone and Webster Engineering Corpo
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