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@ARTICLE{Engelpracht:889922,
author = {Engelpracht, Mirko and Gibelhaus, Andrej and Seiler, Jan
and Graf, Stefan and Nasruddin, Nasruddin and Bardow,
André},
title = {{U}pgrading {W}aste {H}eat from 90 to 110 °{C}: {T}he
{P}otential of {A}dsorption {H}eat {T}ransformation},
journal = {Energy technology},
volume = {9},
number = {1},
issn = {2194-4296},
address = {Weinheim [u.a.]},
publisher = {Wiley-VCH},
reportid = {FZJ-2021-00530},
pages = {2000643 -},
year = {2021},
abstract = {Low‐grade heat is abundantly available below 100 °C,
whereas industry mainly needs heat above 100 °C. Thus,
the industry cannot directly utilize low‐grade heat to
save primary energy and emissions. Low‐grade heat can be
utilized by adsorption heat transformers (AdHTs); however,
closed AdHTs to upgrade heat above 100 °C are only
investigated by idealized steady‐state analyses, which
indicate the maximal theoretical performance. For evaluating
the performance achievable in practice, this work studies a
closed AdHT in a one‐bed configuration using dynamic
simulation. For the working pair AQSOA‐Z02/H2O, the
performance is optimized via the design of the adsorber heat
exchanger and the control of the AdHT cycle. When heat is
upgraded from 90 to 110 °C, releasing waste heat at
35 °C, the maximum exergetic coefficient of performance
(COPexergetic) is 0.64, and the maximum specific heating
power (SHP) is 590 W kg−1. The maximum SHP can
increase by $35\%$ when releasing waste heat at 25 °C.
Both performance indicators strongly depend on design,
control, and the available temperature of the waste heat.
Overall, AdHTs with optimized design and control are
promising to utilize low‐grade waste heat.},
cin = {IEK-10},
ddc = {620},
cid = {I:(DE-Juel1)IEK-10-20170217},
pnm = {1121 - Digitalization and Systems Technology for
Flexibility Solutions (POF4-112)},
pid = {G:(DE-HGF)POF4-1121},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000587355800001},
doi = {10.1002/ente.202000643},
url = {https://juser.fz-juelich.de/record/889922},
}