TY  - JOUR
AU  - Sass, Susanne
AU  - Mitsos, Alexander
TI  - Optimal operation of dynamic (energy) systems: When are quasi-steady models adequate?
JO  - Computers & chemical engineering
VL  - 124
SN  - 0098-1354
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2020-02210
SP  - 133 - 139
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000461465600010
DO  - DOI:10.1016/j.compchemeng.2019.02.011
UR  - https://juser.fz-juelich.de/record/877457
ER  -