Accession Number : ADA307000

Title :   Non-Ozone Depleting Supercritical Cleaning Fluids: Design, Fabrication, and Operation of First Preproduction Natural Convection Device.

Descriptive Note : Final rept. 15 Nov 93-15 Dec 95,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s) : Marshall, Mary ; Roberds, W. T. ; Pollard, Gordon

PDF Url : ADA307000

Report Date : DEC 1995

Pagination or Media Count : 97

Abstract : Southwest Research Institute (SwRI) has developed the natural convection supercritical fluids (SCF) cleaner as a potential substitute for 1,1,1-trichloroethane and Freon 113. This cleaner offers the potential for reduced capital investment, lower, operating costs, and improved maintainability and reliability over the conventional SCF devices principally by eliminating the circulating SCF and the compressor requirement. The first prototype cleaner (only 2 inches in diameter) was built in 1991 at SwRI on internal research and development funds. To demonstrate the natural convection technology on a production scale and to provide a USAF with a useful tool for detailed assessments, this project's objective was to construct a preproduction device which could clean 70% of all parts handled at WPAFB (Wright-Patterson Air Force Base) Aircraft Modification Directorate. A 10-inch diameter cleaning chamber was specified to handle parts weighing up to 70 pounds. The SwRI prototype was used for experimental studies for process design purposes and as a guide for scale-up.

Descriptors :   *DEPLETION, *CONVECTION, *FLUIDS, *CLEANING COMPOUNDS, *SUPERCRITICAL FLOW, REQUIREMENTS, EXPERIMENTAL DATA, AIRCRAFT, PRODUCTION, MODIFICATION, PROTOTYPES, MAINTAINABILITY, RELIABILITY, SCALE, SUBSTITUTES, COMPRESSORS.

Subject Categories : Solvents, Cleaners, and Abrasives
      Organic Chemistry
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE