The objective of this study is to evaluate adsorption
characteristics of R134a and R404a on commercially available
silica gel samples. A constant volume variable pressure method
at different adsorption temperatures ranging from 293 to 323 K
and for pressures up to 500 kPa is used in the experimental
measurements. Three different type of commercially available
silica gel samples were chosen as adsorbent. The isotherms
obtained from the experimental measurements were presented.
Adsorption parameters were evaluated from the isotherms in
order to obtain correlations in the form of the Dubinin-Astakhov
(DA) equation. The pressure and temperature dependence of the
isosteric enthalpies of adsorption is computed with the
evaluation of the measured data and the derived equations.
Further, the enthalpy of adsorption data were extracted, and
correlations are provided for adsorbent-adsorbate pairs obtained
from the combinations of the three different silica gel specimens
and two refrigerants.
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .