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| Home > Publications database > Optimal operation of dynamic (energy) systems: When are quasi-steady models adequate? |
| Home > Publications database > Optimal operation of dynamic (energy) systems: When are quasi-steady models adequate? |
| Journal Article | FZJ-2020-02210 |
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2019
Elsevier Science
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.compchemeng.2019.02.011
Abstract: Since design optimization faces the challenge of solving inherently large optimization problems, the complexity of underlying dynamic systems is often reduced by applying quasi-steady state assumptions. It is thereby indispensable to identify the components whose transient behavior is essential to ensure meaningful results. In this study, we discuss a dynamic model for an illustrative hybrid energy system, which extends the quasi-steady models of Voll et al. (2013). Based on optimal operation with fixed design, we underline the importance of the relationship between the dynamics of the model and of the input data for the adequateness of quasi-steady operation. Our results emphasize the need for suitable ramp constraints in quasi-steady models of dynamic systems within operational optimization. Moreover, the existence of a storage unit is no sufficient justification for quasi-steady state assumptions.
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