considering energy loss and fragmentation. Based on the energy spectra, LET-spectra are ca1cu1ated. The form of the LET-spectra and their dependence on the composition of the shielding material are discussed. For LET- spectra measured by different, detectors, the restricted energy losses are converted to LET (infinity) in water. After this it is possible to compare the results of different experiments with each other and with ca1cu1ated...LET-spectra. (Author) Source of Abstract (Subfile): AIAA/TIS Keywords: *ENERGY SPECTRA; *GALACTIC COSMIC RAYS; ♦GEOMAGNETISM; *HEAVY NUCLEI; *LINEAR ENERGY TRANSFER (LET); ♦MAGNETIC EFFECTS; *MILKY WAY GALAXY; *RADIATIDN SHIELDING; ABUNDANCE; ALUMINUM; ENERGY DISSIPATION; MAGNETIC SHIELDI NG; SPACELAB Subject Classification: 7593 Space Radiation (1975--) Sensitivities of projected 1980 photovoltaic system costs to major system cost drivers. ZIMMERMAN, L. W.; SMITH, J. L. Jet Propulsion Lab., California Inst, of Tech., Pasadena. Corp .. Source Code: J J 57 4 450 Dec. 1984. 89P. Report No.: NASA-CR-175669; JPL-PUBL-84-93; NAS 1.26: 175669; D0E/ET-20356/20 Contract No.: NAS7-918; JPL PROJ. 5220-28; DEAI01-76ET- 20356 Language: Eng1ish. Country of Origin: United States. Country of Publication: Uni ted States Document Type: REP0RT Most documents avai1 ab1e from AIAA Techni ca1 Li brary Other Availability: NTIS HC A05/MF AOI Jo ।u rna1 An n oun cement: STAR8514 The sensitivity of projected 1990 photovoltaic (PV) system costs to major system cost drivers was examined. It includes: (1) module costs and module efficiencies; (2) area related balance of system (BOS) costs; (3) inverter costs and efficiencies; and (4) module marketing and distribution markups and system integration fees. Recent PV system cost experiences and the high costs of electricity from the systems are reviewed. The 1990 system costs are projected for five c1 asses of PV systems, i nc1ud i ng f our ground mounted 5- MWp systems and one residential 5-kWp system. System cost projections are derived by first projecting costs and efficiencies for all subsystems and components. Sensitivity analyses reveal that reductions in module cost and engineering and system integration fees seem to have the greatest potential for contributing to system cost reduction. Although modu1e cost is c1ear 1 y the prime candidate for fruitful PV research and development activities, engineering and system integration fees seem to be more amenable to reduction through appropriate choice of system size and market strategy. Increases in inverter' and module efficiency yield significant benefits, especially for systems with high area related costs. (E.A.K.) Source of Abstract (Subfile): NASA STIF
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