Development of a model and computer code to describe solar grade silicon production processes. Sixth Quarterly Report

Technical Report · Tue May 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5861959· OSTI ID:5861959

Srivastava, R; Gould, R K

This program aims at developing mathematical models and computer codes based on these models, which allow prediction of the product distribution in chemical reactors for converting gaseous silicon compounds to condensed-phase silicon. The major interest is in collecting silicon as a liquid on the reactor walls and other collection surfaces. Two reactor systems are of major interest, the Westinghouse SiCl/sub 4//Na reactor in which Si(l) is collected on the flow tube reactor walls and the new AeroChem reactor in which Si(l) droplets formed by the SiCl/sub 4//Na reaction are collected by a jet impingement method. During this quarter the following tasks have been accomplished: (1) formulation of a model for silicon vapor separation/collection from the developing turbulent flow stream within reactors of the Westinghouse type, (2) modification of an available general parabolic code to achieve solutions to the governing partial differential equations (boundary layer type) which describe migration of the vapor to the reactor walls, (3) a parametric study using the boundary layer code to optimize the performance characteristics of the Westinghouse reactor, (4) calculations relating to the collection efficiency of the new AeroChem reactor, and (5) final testing of the modified LAPP code for use as a method of predicting Si(l) droplet sizes in the these reactors.

• Research Organization: Aerochem Research Labs., Inc., Princeton, NJ (USA)
• DOE Contract Number: NAS-7-100-954862
• OSTI ID: 5861959
• Report Number(s): DOE/JPL/954862-6; AeroChem-TN-206
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
BOUNDARY LAYERS
CHEMICAL REACTORS
COMPUTER CODES
DEPOSITION
DIRECT ENERGY CONVERTERS
ELEMENTS
FLUID FLOW
FLUIDS
GASES
LAYERS
MATHEMATICAL MODELS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PRODUCTION
SEMIMETALS
SILICON
SILICON SOLAR CELLS
SOLAR CELLS
TURBULENT FLOW
VAPORS
WALLS