THE ABSORPTANCE OF A WATER CRYODEPOSIT AT 77 DEGREE K FOR 350 DEGREE K RADIATION
Abstract
The results of an investigation to determine the effect of a water cryodeposit on the radiative properties of two surfaces are presented. The experimental apparatus consisted of a concentriccylinder calorimeter in which the inner cylinder was a blackbody heater maintained at about 77 K. Data are presented for the total hemispherical absorptance versus the thickness of water frost formed on a vacuum-metallized aluminum surface and on a Parson's black surface. It was found that the absorptance of the cryodeposit-wall complex attained a value of about 0.95 for frost thicknesses on the order of 0.1 mm. For thicknesses greater than 0.1 mm, the absorptance of the complex was found to be independent of the nature of the wall surface in contrast to earlier results for carbon dioxide cryodeposits.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1963
- Accession Number
- AD0414429
Entities
People
- R. L. Young
- T. M. Cunningham Jr.
Organizations
- Arnold Engineering Development Complex