Capability: The Alph NG app performs quick natural gas process calculations, including two- and three-phase flash calculations, phase envelopes, hydrate temperature, and pressure prediction. It uses Virtual Materials Group's package of Advanced Peng-Robinson equations for natural gas and for commercially important natural gas compounds. The processor is able to calculate fluid properties such as temperature, pressure, specific molar enthalpy and entropy, energy flow, molecular weight, and compressibility factor. 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 enables 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.
Hardware: iPhone, iPod Touch, or iPad.
Developer: Red Tree Development Inc., 4386 Timberline Crescent, Box 6001, Fernie, B.C., V0B 1M6 Canada; http://wilbur.redtree.com.
Cost: Cost: $59.99 downloaded from the Appstore on iPhone, iPod Touch, or iPad, or at www.itunes.com/ appstore. Alph Jr. is free.
www.me.hotims.com/31864-73 or circle 73