文档介绍：Automated System for Calculating Thermophysical Properties of
Natural and Ozone-Safe Refrigerants and Their Mixtures
. Vasserman1,2, . Malchevsky1, . Bodyul3
_____________________________________
1 Odessa National Maritime University, Mechnikova Str. 34, Odessa, 65029, Ukraine
2 To whom the correspondence should to be addressed. E-mail: avas@
3 Odessa State Academy of Refrigeration, Dvoryanskaya Str. 1/3,Odessa, 65026,
Ukraine
2
ABSTRACT
An automated system for calculating the thermophysical properties of monatomic and
diatomic gases, air, carbon dioxide, water and steam, ammonia, some hydrocarbons,
refrigerants and their mixtures has been created. It allows the calculation pressi-
bility factor, density, entropy, enthalpy, isochoric and isobaric specific heats, speed of
sound, Joule-Thomson coefficient, viscosity, thermal conductivity, and some other
properties. These parameters can be determined in the single-phase and two-phase re-
gions and on the phase-equilibrium lines at temperatures from the triple point up to
400–1500 K and at pressures up to 70 or 100 MPa (in most cases). Properties can be
calculated for the following binations of independent variables: T, ρ; T, v;
T, p; T, s; T, h; T, x; p, ρ; p, v; p, s; p, h; p, x; h, s.
KEY WORDS: automated system; gases; liquids; mixtures; thermophysical properties.
3
1. INTRODUCTION
For designing and investigation of cryogenic and refrigerating plants reliable data
on thermophysical properties of working substances in wide region of parameters is
necessary. For solving many practical tasks these data should be presented at different
independent variables at various values of these variables. At present time automated
systems are created, for example [1 – 4], which allow to obtain thermophysical proper-
ties of substances operatively by means of equations of state and equations for transport
properties.
Because of the expansi