CHIGP is a joint industry project for the development of the CPA (Cubic-Plus-Association) equation of state for systems of relevance to the oil & gas and chemical industries.
2012 was the 10th consecutive year of the joint industry project of CERE, called CHIGP. Current participants are Statoil (Norway), GASSCO (Norway), BP (UK), DONG Energy (Denmark) adn Petrobras (Brazil)
The major purpose of the project is to further develop and maintain a rigorous thermodynamic model, the CPA (Cubic-Plus-Association) equation of state. CPA is a model useful for thermodynamic calculations for mixtures of relevance to the petroleum and chemical industries e.g. mixtures of oil and gas with gas hydrate inhibitors (methanol, glycols) and organic acids. Such polar and hydrogen bonding compounds are difficult to handle with conventional models used in oil industry like cubic equations of state and CPA offers a successful alternative and is a good compromise between accuracy and simplicity. Moreover, CPA can predict thermodynamic properties over the extensive temperature and pressure ranges encountered in industrial practice.
In addition to extending the model to new mixtures of industrial and scientific significance, robust algorithms for complex thermodynamic calculations and parameter estimation are being developed and new experimental measurements are being carried out when necessary in order to support the model development. Such measurements are often being carried out in collaboration with industrial partners of the CHIGP consortium. Finally, all results are immediately disseminated to the participating companies via CERE’s web-site (and a special project web-site).
The deliverables include, besides publications, technical reports and presentations, software in form of CAPE-OPEN compliant modules and user-models for the ASPEN process simulator. In this way the results can be used by industry almost as soon as they are produced. Moreover, the results are presented in progress meetings held twice per year; 18 meetings have been held since 2003, the last one was in December 2012.