INTERPOLATION CORRELATIONS FOR FLUID PROPERTIES OF HUMID AIR IN THE TEMPERATURE-RANGE 100 DEGREES-C TO 200 DEGREES-C

This paper provides simple analytical correlations fbr selected thermo dynamic and fluid transport properties for the mixture dry air and wat er vapor. These correlations are derived from theory as well as from n umerical fitting procedures and give expressions for density rho, visc osity mu, thermal conductivity k, specific heat c(p), and Prandtl numb er Pr at a working pressure of p = 1 bar and for a temperature range f rom 100 degrees C to 200 degrees C. The main purpose is to present a c omparatively simple set of equations, as the correlations do not refle ct in every case the underlying physical background. Since experimenta l data are scarce for the properties under investigation, it was in so me cases necessary to extrapolate the available correlations to temper atures or water vapor contents where no experimental data could be fou nd. The derived equations are compared with the pure component values for dry air and water vapor and, as far as possible, also for air-wate r vapor mixtures. (C) 1997 American Institute of Physics and American Chemical Society.