Les triplettes de belleville torrent. DDBSP - Dortmund Data Bank Software Package 2015 Condensed Data Sheet Page 5 of 7 The first value is always the recommended one. Furthermore the values can be displayed in different units by selection the push-down button next to the currently used unit. If and which units are available depend on the entries of the conversion rules file. The Dortmund Data Bank (short DDB) is a factual data bank for thermodynamic and thermophysical data. Its main usage is the data supply for process simulation where experimental data are the basis for the design, analysis, synthesis, and optimization of chemical processes.The DDB is used for fitting parameters for thermodynamic models like NRTL or UNIQUAC and for many different equations.
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Managing Directors:
Dr. Andreas Grybat |
Dr. Sven Horstmann |
Dr. Christian Ihmels |
Dr. Bastian Schmid |
History:
The Dortmund Data Bank (DDB) was started in 1973 in the research group of Prof. Dr. J. Gmehling at the University of Dortmund (Chair of Reaction Engineering of Prof. Dr. U. Onken) with the compilation of VLE-data for normal boiling mostly organic compounds. It was later extended to cover also pure component properties, liquid-liquid equilibrium data, excess enthalpies, activity coefficients at infinite dilution, .
In 1989 the DDB moved to DDBST GmbH (Oldenburg) which guarantees the regular updating of the data banks and at the same time develops additional data compilations, e.g. VLE of low boiling substances, VLE of electrolyte systems (ELE), excess volumes (VE), adsorption equilibria, ..
DDBST GmbH was founded in 1989. The main goal was a professional, commercially oriented development, support and further extension of data banks and calculation programs. The Dortmund Data Bank is the largest factual data bank for experimental data on pure components and mixtures and available via in-house versions and online (as part of DETHERM).
Mission:
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Special attention is paid to:
- Update and improvement of the Dortmund Data Bank (DDB). To accomplish this, an agreement was signed with DECHEMA. Support and regular updates of the DDB are financed by revenues.
- Development and support of thermodynamic calculation programs
- Preparation of manuals and documentation, user support and training
- Development of new data banks and calculation methods compatible to DDB and DDB Software Package (DDBSP)
- Consulting with special attention to separation processes.
Cooperation:
Always the latest versions of the different data banks and program packages and a free support are supplied to the Chair of Industrial Chemistry at the University of Oldenburg for teaching as well as research purposes. This collaboration led to the development or further development of group contribution methods like UNIFAC, mod. UNIFAC, PSRK, VTPR and electrolyte models. The intensive use greatly improves our products reliability, quality, performance and applicability. In addition, numerous suggestions from industry as well as academic customers are incorporated into new versions of DDB and DDBSP.
Customers:
Customers of DDB and DDBSP include about 50 chemical and engineering companies throughout the world as well as university and research institutions.
Partners:
Through different alliances, products and services of DDBST GmbH are supplied throughout the world: The Dortmund Data Bank is supplied as in-house version by DDBST and DECHEMA, which are linked by a cooperation agreement. DECHEMA distributes the DDB as part of their data bank DETHERM. Carreteras secundarias 1997 movie online watch free. Aspen Tech Inc. distributes the DDB on CD together with the required software for data access. Aspen Tech and DECHEMA operate an Internet server for the distribution of data from DDB and DETHERM.
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With a view to the synthesis and design of separation processes, fitting and critical examination of model parameters used for process simulation and the development of group contribution methods 1973 a computerized data bank for phase equilibrium data was started by J. Gmehling and U. Onken at the University of Dortmund.
While at the beginning mainly VLE data for non-electrolyte mixtures (Tb > 0 °C) were considered, later on also VLE including compounds with Tb<0°C, LLE, hE, g∞, azeotropic, cPE, SLE, vE, adsorption equilibrium, polymer data, transport properties, . for non-electrolyte and electrolyte systems as well as pure component properties were stored. The DDB currently (2020-August-27) contains 8.9 million data tuples for approximately 81,000 components from 89,700 references (180,800 evaluated). The data bank can be searched online for free (only data from the open literature are reported).
The Dortmund Data Bank (DDB) now contains nearly all worldwide available phase equilibrium data, excess properties, transport properties and pure component properties even for polymer and electrolyte systems. The status of the Dortmund Data Bank Version 2020 is given below in a diagram.
Besides the easily accessible thermo-physical properties from scientific literature (J. Chem. Eng. Data, J. Chem. Thermodyn., Fluid Phase Equilib., Thermochim. Acta, and Int. J. Thermophys.) DDB contains a great part of data not available via the open literature (systematic measurements for the development of predictive tools, private communications, confidential data from industry, BSc., MSc and PhD theses, … from all over the world).
These data will not be provided by online-services and are not made available to competitors of DDBST GmbH. The only access to these data is via a DDB inhouse license.
The regular yearly update of the DDB can be judged from the figure below. DDB grows by nearly 8% per year in data volume. Nearly all data input is done at DDBST GmbH in Oldenburg by long term employees with many years of experience with support from colleagues in China, Japan, Korea, Estonia, ….
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Dortmund Data Bank Software Package Free Download Free
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