Alph NG app

The Alph NG app performs quick and accurate process calculations, including two- and three-phase flash calculations, phase envelopes, and hydrate temperature and pressure prediction. It uses Virtual Materials Group’s package of Advanced Peng-Robinson equations of state for natural gas and commercially important natural gas compounds, specifically: C1–C10, CO2, H2S, N2, O2, H2O, H2, He-4, methanol, ethanol, ethylene glycol, diethylene glycol, triethylene glycol, methyl mercaptan, ethyl mercaptan, carbonyl sulfide, carbon disulfide, dimethyl sulfide and dimethyl disulfide. Custom compounds, such as heavier fractions, can also be defined. Its simple formula system allows fluids to be defined in terms of one another, which allows users to make sophisticated calculations. A free version, Alph Jr., has all the capabilities of the natural gas edition, but is limited to the straight-chain alkanes methane through decane. This free version is suitable for evaluation, as well as for instructional and learning purposes. Alph is able to calculate the following fluid properties: molar vapor fraction (phase fraction when viewing phases), temperature, pressure, molar flow rate, specific molar enthalpy, specific molar entropy, energy flow, molecular weight, compressibility factor, specific molar volume, mass density, standard liquid density, viscosity, kinematic viscosity, thermal conductivity, surface tension, constant-pressure specific molar heat capacity, constant-volume specific molar heat capacity, exergy, Gibbs free energy, lower heating value, higher heating value, mass flowrate, specific mass enthalpy, specific mass entropy, and many more. Both Alph NG and Alph Jr are now available in the iTunes App Store.