Browsing by Issue Date, starting with "1996-04"
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- Prediction of halocarbon liquid densities by a modified hard Sphere-De Santis equation of state.Publication . Fialho, Paulo; Nieto de Castro, Carlos A.The present paper describes a general scheme for the prediction of halocarbon liquid state densities based on a modified hard sphere De Santis equation of state. It is shown that it is possible to estimate the density of pure liquids solely from the critical constants and relative molecular mass to better than 1.5% for T∗ < 0.9 and from saturation vapour pressures up to 20 MPa.
- Prediction of liquid densities for halocarbon mixtures by a modified Hard Sphere-De Santis equation of state.Publication . Fialho, Paulo; Nieto de Castro, Carlos A.In a companion paper, we dealt with the problem of predicting the liquid behaviour of pure refrigerants. It is the purpose of the present paper to extend the use of the Hard Sphere De Santis (HSDS) model by associating it with mixing and combination rules to predict the liquid state densities for mixtures of halocarbon refrigerants. The deviations obtained between the experimental data, available for binary and ternary mixtures, and the HSDS model have shown an uncertainly of 1.5% for T∗ ≤ 0.9. This was the uncertainty claimed for the model, when applied to pure fluids.
- Modelação do efeito de preço e promoções para uma família de produtos alimentares.Publication . Mendes, Armando B.; Themido, Isabel H.