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. sodium systems all energy from the receiver goes through storage before going to the electric generating equipment. The default value is consistent with a molten nitrate salt storage: EFFSTR = 1.0 III. G-8. Parasitic Loads-The power rating and net yearly energy production of the plant include parasitic load factors (PI,). At the design point: For system optimization purposes over the year: where K W-HR,,,, includes an assumed weather outage. This algorithm does not work well in calculating parasitic losses for systems with different solar multiples, since for that case the design point gross electric power and thus parasitic losses could be constant between different systems. It is assumed that all energy from the receiver will be routed to storage, and that all energy to the turbine will come from storage. This means that the operating parasitic fraction REFPRL (Namelist NLEFF) should include parasitics as- sociated with operating storage as well as operating the receiver and EPGS equipment. The only time at which REFPRL is not applicable is when, at the end of a day, the receiver shuts down and yet the turbine keeps operating from the energy remaining in storage. In this case, the parasitic fraction REFPRL is reduced to the fraction FSP, where FSP is the fraction of parasitic losses not attributable to field and receiver operation. This is the reason why PLREF and PLAVG differ from each other. Assuming that storage only operation requires this fraction fs (FSP) of the design point parasitic load, then where HrREc = hrs/day of receiver operation = HROP/365 HrSTOR = hrs/day of storage operation (receiver shut down) - Energy stored - MW+..~~,,,,/VTE.~ EF (llI.G - 23) The amount of energy stored is dependent on the size of the storage tank(s). Section V.A-8 discusses in detail how storage is sized. 87
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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
Page 36 and 37: 36 Figure 11-7. Schematic Diagram o
Page 38 and 39: -SLEW (1)- Figure 11-8. Example of
Page 40 and 41: Figure 11-9. Radial Stagger Arrange
Page 42 and 43: Note that when IDENS=l or 2 the azi
Page 44 and 45: 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 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 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.
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(V.B - 6) The discount rate rDIS is
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VI. Program Flow DELSOL can be used
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.I c to reach a certain design powe
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an optimum storage size based on en
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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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