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@ARTICLE{Vaupel:877460,
author = {Vaupel, Yannic and Huster, Wolfgang R. and Holtorf,
Flemming and Mhamdi, Adel and Mitsos, Alexander},
title = {{A}nalysis and improvement of dynamic heat exchanger models
for nominal and start-up operation},
journal = {Energy},
volume = {169},
issn = {0360-5442},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-02213},
pages = {1191 - 1201},
year = {2019},
abstract = {For control-oriented modeling of heat exchangers, the two
predominant model types are the moving boundary (MB)
approach and the finite volume (FV) method. In this
contribution, we assess both approaches. As a case study, we
present an organic Rankine cycle (ORC) for waste heat
recovery (WHR), for which experimental data is available.
For simulation of nominal operation, we observe that the MB
approach requires less CPU time than the FV method, even for
a low number of cells, which is in agreement with
literature. In the start-up case, where only subcooled
liquid is present, analysis of the MB model reveals that the
model can exhibit an unphysical inverse response in outlet
enthalpy due to its averaging assumption. This problem can
be circumvented via the use of a hybrid MB-FV model or an
adjusted averaging assumption. A simulation study based on
experimental data shows that both proposed solution
approaches can be successfully employed.},
cin = {IEK-10},
ddc = {600},
cid = {I:(DE-Juel1)IEK-10-20170217},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000459528500096},
doi = {10.1016/j.energy.2018.12.048},
url = {https://juser.fz-juelich.de/record/877460},
}