Evacuated-tube solar collector (ETSC) is developed to achieve high heating medium temperature. Heat transfer fluid contained inside a copper heat pipe directly affects the A 10 mol% of ethylene-glycol in water this system. The purpose study modify inner structure evacuated tube for promoting through aluminum fin by inserting stainless-steel scrubbers increase conduction surface area. experiment...

An equation of state (EOS) CH4-N2 fluid mixtures in terms Helmholtz free energy has been developed by using four mixing parameters, which can reproduce the pressure-volume-temperature-composition (PVTx) and vapor-liquid equilibrium (VLE) properties mixtures. The average absolute deviation all PVTx data available up to 673.15 K 1380 bar from this EOS is 0.38%. Combining CH4-CO2 CO2-N2 our previo...

Group contribution methods, such as UNIFAC or ASOG can be successfully applied to the prediction of the real behavior of non electrolyte mixtures. Therefore these methods are used worldwide in the different process simulators for the synthesis and design of separation processes. Since the well known group contribution methods still show some weaknesses a modified version of the UNIFAC method ha...

New isothermal vapor–liquid equilibrium (VLE) data for the carbon dioxide + 1,4-dioxane system are reported at four temperatures (323.15, 333.15, 343.15, and 353.15) K pressures up to 122.7 bar. The critical curve was also measured 158.8 bar 420.15 K. Phase behavior measurements were performed in a high-pressure windowed cell with variable volume, using static-analytical method phases sampling ...

Avariationalmethod is employed to obtain governing equations and boundary conditions describing finite strain equilibrium configurations of elastomeric gels. Three situations are considered: a liquid saturated gel, an unsaturated gel, and a gel in equilibriumwith a vapor of its own liquid. Surface tractions can lead to equilibrium transitions between these cases. The liquid saturated gel is reg...

Ž . In this work, we apply the Gibbs–Duhem integration GDI technique to obtain the vapor–liquid equilibrium Ž . VLE properties of hydrogen fluoride according to three potential models. Properties examined include coexistence densities, enthalpy of vaporization, and vapor pressure. The models are representative of the various types of potentials used in simulation studies; namely, a pure pair po...

Preface Group contribution methods have been used to calculate the properties of pure components, such as viscosity, surface tension, critical property etc.。Recently,group contribution methods are also used to predict vapor liquid equilibrium of the systems in which the composition of the components can be known exactly. In this paper, the group contribution method is used to predict the vapor ...