TDS RELEASES PPDS3 FOR WINDOWS.(Technical Database Services Inc.)

Technical Database Services, Inc. (TDS), the North American distributor of PPDS software, has announced the availability of a major program release, PPDS3 for Windows.

PPDS3 calculates physical, thermodynamic and transport properties and, the phase equilibrium of pure components and mixtures. It supersedes PPDS2 (see 'Online Newsletter' November 1993 p.7), the physical properties calculation engine that has long been an industry standard for data vital in a wide range of design, process and safety engineering applications. PPDS3 is the main program in the PPDS suite, a proven set of programs and databases.

PPDS3 is an advanced client/server application that has been developed for standalone PCs, networks, corporate intranets, and Website deployment by National Engineering Laboratory UK (NEL). Its expand data structure has spawned a number of parallel developments such as new equation forms and calculation methods have been implemented and improved quality assurance information has been added throughout the PPDS system. Enhanced application programming interfaces simplify the integration of PPDS3 with market-leading software in such areas as spreadsheets (the MS EXCEL add-in), process simulation, heat transfer, and process safety applications.

PPDS3 provides 31 fixed properties and 27 variable properties for over 1,500 pure components and special modules for calculating the properties of steam, refrigerants and petroleum factions. Many new data fields have been added to accommodate properties not available in earlier versions.

New capabilities of PPDS3 include:

PPSD3 can now handle substances that are not in the fluid phase. Solid phase properties such as solid density, solid heat capacity and solid heat of fusion have been added. This data will also be used as input into the solid/liquid equilibrium model which will be implemented in the next development phase of PPDS3.

The Second Virial Coefficient, a measure of the Van der Waals intermolecular forces existing between pairs of molecules, will be displayed. This parameter is important to the derivation of fluid phase behavior and will also serve as input into the ...