Record Display for the EPA National Library Catalog


Main Title Electric component cooling alternatives: {microform} compressed air and liquid nitrogen.
Author Schmitt, S. S. ; Olfenbuttel, R. F.
CORP Author Battelle, Columbus, OH.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher U.S. Environmental Protection Agency.
Year Published 1994
Report Number EPA 600/R-94/170; EPA-68-CO-0003
Stock Number PB95-100087
Additional Subjects Cooling ; Environmental chemical substitutes ; Air pollution abatement ; Liquid nitrogen ; Compressed air ; Refrigerants ; Failure mode anlaysis ; Troubleshooting ; Failure modes ; Cracks ; Printed circuit boards ; Integrated circuits ; Capacitors ; Alternatives ; Comparison ; Performance evaluation ; Electronic industry ; Printed circuit board manufacturing ; Thermally intermittent compounds
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB95-100087 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 104 p. ; : ill..
The goal of the study was to evaluate tools used to troubleshoot circuit boards with known or suspected thermally intermittent components. Spray cans of refrigerants (R-12 (CFC-12) and R-22 (HCFC-22)), which are commonly used in electronics manufacturing and repair businesses for this purpose, served as the benchmark for the evaluation. A promising alternative technology that was evaluated in the study is a compressed-air tool that provides a continuous stream of cold air that can be directed toward specific components. Another alternative technology that was considered is a Dewar flask that dispenses cold nitrogen gas as the cooling agent. Critical parameters were measured for each cooling method to provide a basis for comparison of compressed air and liquid nitrogen with spray cans of refrigerant. Although the plan was written specifically for the evaluation of compressed air, the test plan was written to include an evaluation of liquid nitrogen because test site staff were interested in evaluating this technology. The liquid nitrogen evaluation showed that it could be a viable alternative.
"September 1994." Microfiche.