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Modeling of silicon particle growth. Progress report

Description: Efforts at the Jet Propulsion Laboratory toward the production of pure polycrystaline silicon are centered on the concept of silicon particle growth in a fluidized bed reactor (FBR) and a continuous flow pyrolyzer (CFP). The CFP possibly can provide the seed particles which will be grown to larger sizes in the FBR. In both the reactors polycrystalline silicon is obtaned from the pyrolysis of silane. A part of the JPL effort is to develop a model of silicon particle growth for the purpose of predicting particle growth rates and product particle size distributions in the FBR and the CFP. This repot describes the mathematical models of silicon particle growth in the FBR and the CFP.
Date: April 15, 1979
Creator: Praturi, A.K.; Hsu, G.C. & Lutwack, R.
Partner: UNT Libraries Government Documents Department

Normative price for a manufactured product: the SAMICS methodology. Volume II. Analysis. JPL publication 78-98. [Solar Array Manufacturing Industry Costing Standards]

Description: The Solar Array Manufacturing Industry Costing Standards (SAMICS) provide standard formats, data, assumptions, and procedures for determining the price a hypothetical solar array manufacturer would have to be able to obtain in the market to realize a specified after-tax rate of return on equity for a specified level of production. This document presents the methodology and its theoretical background. It is contended that the model is sufficiently general to be used in any production-line manufacturing environment. Implementation of this methodology by the Solar Array Manufacturing Industry Simulation computer program (SAMIS III, Release 1) is discussed.
Date: January 15, 1979
Creator: Chamberlain, R.G.
Partner: UNT Libraries Government Documents Department

Price allocation guidelines January 1980: Low-cost solar array project

Description: The price allocation guidelines (PAG) are an integrated set of specific cost targets for several task areas within the Low-cost Solar Array (LSA) Project. PAG is a working tool of LSA Project management designed to provide consistent and meaningful guidelines for costs of polycrystalline silicon material, sheet, cells, encapsulants, and module manufacturing. It is expected that advanced photovoltaic concepts derived from industry and the research community can be developed so that it will be possible by the end of 1982 to demonstrate production processes, all process steps, and prototype equipment required to manufacture flat-plate photovoltaic modules. This demonstration would incorporate production rates and product quality consistent with a specific market price determined by the program. This stage of development has been referred to as Technical Readiness. A goal of $0.70 per peak watt (1980 dollars) has been established for the cost of electricity generated by photovoltaic modules. The processes for producing modules demonstrated to be technically ready must be amenable to scale-up so that this price goal can eventually be achieved in the marketplace. The guidelines described in this document allocate portions of that goal to each module component. Sheet materials derived from the following five technologies are considered: Czochralski, heat exchanger method (HEM), edge-defined film growth (EFG), dendritic web, and silicon on ceramic (SOC). Each type of material provides a unique combination of projected silicon yield, cell efficiency, and module packing efficiency. Also included are tables describing actual inflation rates from 1975 to 1979, and projected inflation rate to mid-1980. Project goals are now expressed in 1980 dollars rather than 1975 dollars, and these tables enable conversion of dollar amounts from prior years (1974 to 1980) to their 1980 or 1975 equivalents.
Date: January 15, 1980
Creator: Aster, R. W.
Partner: UNT Libraries Government Documents Department

Purification of silicon by the silicon fluoride transport process. Thermochemical study

Description: A computer-assisted thermochemical equilibrium analysis was conducted for the silicon transport reaction: Si(s) + SiF/sub 4/(g) = (intermediates) = Si(s) + SiF/sub 4/(g). The calculations indicated that a substantial transport rate should be possible at temperatures of 1700/sup 0/K and one atmosphere pressure. Computations were made to determine whether the elemental impurities present in metallurgical-grade silicon would transfer in this process. It was concluded that aluminum, chromium, copper, iron, manganese, molybdenum, nickel, vanadium, and zirconium would not transfer, but that boron, magnesium, phosphorus, and titanium would transfer.
Date: April 15, 1979
Creator: Rhein, R.A.
Partner: UNT Libraries Government Documents Department

Normative price for a manufactured product: the SAMICS methodology. Volume I. Executive summary. [Solar array manufacturing industry costing standards]

Description: The Solar Array Manufacturing Industry Costing Standards (SAMICS) provide standard formats, data, assumptions, and procedures for determining the price a hypothetical solar array manufacturer would have to be able to obtain in the market to realize a specified after-tax rate of return on equity for a specified level of production. This document summarizes the methodology and its theoretical background. It is contended that the model is sufficiently general to be used in any production-line manufacturing environment.
Date: January 15, 1979
Creator: Chamberlain, R.G.
Partner: UNT Libraries Government Documents Department