CAPTURE COEFFICIENTS OF CARBON DIOXIDE AND NITROGEN GAS ON A CRYOGENIC COOLED SURFACE.
Abstract
Capture coefficients of CO2 and N2 were measured on a flat cryopanel. The cryopumping of 300 K CO2 on an 85 K surface resulted in a capture coefficient of 0.58 while for 300 K N2 on a 33 K surface a coefficient of 0.65 was measured. The pressure drop method employed to measure the above capture coefficients was studied to account for vapor pressure, temperature corrections, and assumptions which must be made in the calculation of the capture coefficient. An analog model of the actual system was capable of predicting system pressure responses. Instrumentation and construction of gaseous helium transfer lines necessary to effect the above measurements are also discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0487388
Entities
People
- Louis Carmelo Tedeschi
Organizations
- Naval Postgraduate School