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  • Other Sources  (3)
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  • 1
    facet.materialart.
    Unknown
    Low cost solar array project silicon materials task. Development of a process for high capacity arc heater production of silicon for solar arrays (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The experimental verification system for the production of silicon via the arc heater-sodium reduction of SiCl4 was designed, fabricated, installed, and operated. Each of the attendant subsystems was checked out and operated to insure performance requirements. These subsystems included: the arc heaters/reactor, cooling water system, gas system, power system, Control & Instrumentation system, Na injection system, SiCl4 injection system, effluent disposal system and gas burnoff system. Prior to introducing the reactants (Na and SiCl4) to the arc heater/reactor, a series of gas only-power tests was conducted to establish the operating parameters of the three arc heaters of the system. Following the successful completion of the gas only-power tests and the readiness tests of the sodium and SiCl4 injection systems, a shakedown test of the complete experimental verification system was conducted.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-163943 , JPL-9950491 , DOE/JPL-954589-80/9
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    A reactor for more efficient solar cells (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Reactor produces highly pure silicon at relatively high temperature of 2,000 K. Process separates liquid silicon product from gaseous coproducts more easily than conventional lower-temperature processes. High production rates may be obtained in relatively small reaction chambers which could include means for collecting or casting silicon ingots.
    Keywords: MATERIALS
    Type: NPO-14381 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 72
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Development of a process for high capacity-arc heater production of silicon (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The realization of low cost, electric power from large-area silicon, photovoltaic arrays will depend on the development of new methods for large capacity production of solar grade (SG) silicon with a cost of less than $10 per kilogram by 1986 (established Department of Energy goal). The objective of the program is to develop a method to produce SG silicon in large quantities based on the high temperature-sodium reduction of silicon tetrachloride (SiCl4) to yield molten silicon and the coproduct salt vapor (NaCl). Commercial ac electric arc heaters will be utilized to provide a hyper-heated mixture of argon and hydrogen which will furnish the required process energy. The reactor is designed for a nominal silicon flow rate of 45 kg/hr. Analyses and designs have been conducted to evaluate the process and complete the initial design of the experimental verification unit.
    Keywords: ENGINEERING (GENERAL)
    Type: Photovoltaic Specialists Conference; Jun 05, 1978 - Jun 08, 1978; Washington, DC
    Format: text
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    NASA TECHNICAL REPORTS
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