THERMODYNAMIC PROPERTIES OF AN AZEOTROPIC FREON-22 AND FREON-115 MIXTURE,
Abstract
An azeotropic mixt. of Freon-22, 48.8%, and Freon-115, 51.2%, has a b.p. of -45.6C. Its vol. cooling power is considerably higher than that of Freon-12, Freon-22, and Freon-115. This mixt. is neither explosive nor toxic. Two equations for calculating the vapor pressure were used: ln p = A + (100 B/T) + C ln (T/100) - D(T/100) to the 6th power and P = (RT/v double prime) + +((c'T - f')/v double prime sq.) + ((a'T - b')/v double prime sq.), where p is the pressure in atm. abs., A = 7.246308, B = -13.738168, C = -3.3686219, D = -0.000048709009, P is the pressure in kg./sq.m. abs., v double prime is the sp. vol. of dry satd. vapor, a' = -0.000006274858, b' = -0.0044939876, c' = 0.029740256, f' = 15.951252, R = 7.5920074, and T is the temp. in degrees K. In the temp. range from 203.16 to 323.16K, the max. deviation between the pressure values obtained from these equations was 0.09%. Thermodynamic properties and sp. vols. of the super-heated vapor are given. The mixt. may be used in industrial equipment designed for operation with NH3 and Freon-22.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 23, 1967
- Accession Number
- AD0655014
Entities
People
- I. S. Badylkes
Organizations
- National Air and Space Intelligence Center