| Autor: |
Eduardo García-Verdugo, María José Cocero, Chong Yan, Martyn Poliakoff, Juan García-Serna, Jason R. Hyde, Joan Fraga-Dubreuil |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
The Journal of Supercritical Fluids. 41:82-91 |
| ISSN: |
0896-8446 |
| DOI: |
10.1016/j.supflu.2006.08.016 |
| Popis: |
A new two-parameter RTD model based on the one-parameter laminar flow model has been proposed. The model, ‘n-laminar model’, is defined in time domain and considers a generalization of the parabolic velocity profile across radial direction; its mathematical deduction is presented in text. The model has been validated for both supercritical and near critical CO2 and near critical H2O. It is shown how the proposed two-parameter model works much better than the classical models with one, two or even three parameters for both CO2 and H2O under near critical and supercritical conditions. A range of experiments at 10–30 MPa and 100–250 °C at different flowrates are presented. Traditional models, such as n-tanks in series or a combination of n-tanks with a plug flow resulted in a poor explanation of the behaviour in most cases with average errors over 100%. Laminar flow has shown the best results within all these classical models, with a mean average error of 50%. The proposed model predicts with an average error of less than 10–20%. Thus the generalization of the laminar flow to n-laminar is a significant improvement over traditional models. This model is the first successful attempt for the modelling of RTD curves at high pressures. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect