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96 r- .-+ITERATE TYER HEIGHT 1 -+ITERATE FIRST RECEIVER VARIABLE 1 -- B I T E R A T E SECOND RECEIVER VARIABLE 1 CALCULATE ZONE BY ZONE PERFORMANCES FOR THIS TOWER AND RECEIVER - TEST FOR FLUX LIMITS - DETERMINE PERFORMANCES AND COSTS - I TEST FOR MINIMUM ENERGY COST L TEST FOR CONTINUED POSITION ITERATInN I -----+ITERATE TOWER POSITION (LAND CONSTRAINT ONLY) 1 FIND FRACTION OF EACH ZONE WITHIN LAND CONSTRAINT (IF ANY) 1 + BUILD UP HELIOSTAT FIELD 1 1 1 --I_ TEST FOR CONTINUED 2nd REC. VAR. ITERATION -------- TEST FOR CONTIL~UED 1st RE~. VAR. ITERATION Figure IV-1. Schematic of Optimization Search L
power and annual energy. Section 111.1 discusses the effect this approximation might have on calculating design point receiver thermal power during system optimization. Essentially, the approximation is good if design point spillage is close to annual average spillage. However, the shape of the image at design point may well be different from the annual average, so flux levels at a specific point may be up to 10% different than calculated during a final performance run. The cosine, shadowing and blocking, and atmospheric attenuation losses used in system optirnization are calculated using minor assumptions of the effect of scaling with tower height and receiver size, as discussed below. Unlike spillage and flux calculations, these losses are calculated separately for design point and for annual averages used during the optimization. DELSOL designs a field for each system during optimization by using the insolation value REFSOL and the design point efficiencies as discussed below, and by adding zones or fractions of zones based on best cost/performance until the requested design power is reached. Note that total yearly insolation, which is used for calculating annual energy, is calculated during the initial performance run dependent on the insolation model chds'en, and the design point insolation as predicted by that model may be different from REFSOL. For an actual plant, insolation at design point will vary due to weather conditions, but if design point insolatioil is reached (REFSOL) then design point performance predictions will be valid. 1V.A-I. Cosine-The field points remain at the same relative position in units of tower height as the tower height is varied. The angles between the sun, heliostat, and receiver (Section 1I.A) remain the same, and therefore the cosine is not a function of the tower height. The very small change in the cosine as the receiver width from the tower centerline is varied is ignored. Thus, only one design point and one annual average loss calculation is needed for examining a set of systems during optimization. 1V.A-2. Shadowing and Blocking-The actual shadow cast by a heliostat in the same relative field position is independent of the tower height. However, the displacement of heliostats relative to each other in radial layouts depends on the ratio of the heliostat dimension to the tower height. Hence, the shadowing and blocking has a small dependence on the tower height. The code, however, neglects this effect. For large systems, i.e., heliostat dimension/tower height
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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
Page 46 and 47: Given that heliostats will be mass
Page 48 and 49: (A) FLAT REFLECTED RAY FROM (B) FOC
Page 50 and 51: IROUND = 0 WM = 9.91 (m) HM = 9.93
Page 52 and 53: That is, the aperture is always loc
Page 54 and 55: controlled by the IAUTOP parameter
Page 56 and 57: only be used with rectangular cavit
Page 58 and 59: grid of points on the DELSOL assume
Page 60 and 61: W E Figure 11-17. Flux Points on a
Page 62 and 63: flux point grid defined during syst
Page 64 and 65: To see whether this problem is occu
Page 66 and 67: Cal cul ati onal Day 1 2 3 4 5 Tabl
Page 68 and 69: 1II.B-I. Position 01 the Sun-The su
Page 70 and 71: where SO is given by Equation (1II.
Page 72 and 73: 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: IV. System Optimization Calculation
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 and 124: 0 co I I I 0 co J 0 c\! c, 0 3 Ln 0
Page 125 and 126: w/2 x RWCAV W/2 x RWCAV IN (180. -
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
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Read in System Definition from File
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. TABLE VI-2 OUTPIJT FROM OPTIMIZAT
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) Power level specific for detailed
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V1.B. DescriDtion of Subroutines in
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C cy c: C C
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L C c C c C c: C c C C c C C C c: c
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C C C C C C C C C C C C C C C C C C
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At the time of the comparisons MIRV
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164 n m W * ? 0 F F 0 ( z W /M W) X
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166 Phase 1; CDRL Item 2, Pilot Pla
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168 43. Vittitoe, C. N. et al., “
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since the values have been already
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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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