PDAE Formulations of Gas Pipes with Gas Mixtures
نویسنده
چکیده
A PDAE model of a multicomponent gas pipeline has been formulated and solved using the ode15s solver of Matlab. The model with boundary conditions allows for reactions and di usion. Also, general cubic equations of state for pressure and enthalpy are described. To simplify the implementation at this stage, a non-reactive, non-di usional model with fixed feed composition is considered, and multicomponent versions of the Redlich-Kwong-Soave and Peng-Robinson equations of state, as well as a multicomponent second order virial equation of state have been implemented. Depending on the use of the model, the results showed the importance of considering the feed composition in the model, as well as using a high quality pressure equation of state (EOS). Furthermore, in order to achieve accurate temperature predictions, it is necessary to use a high quality enthalpy EOS, and to include a transient energy balance.
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