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@ARTICLE{Seiler:877620,
author = {Seiler, Jan and Lanzerath, Franz and Jansen, Christoph and
Bardow, André},
title = {{O}nly a wet tube is a good tube: understanding
capillary-assisted thin-film evaporation of water for
adsorption chillers},
journal = {Applied thermal engineering},
volume = {147},
issn = {1359-4311},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-02335},
pages = {571 - 578},
year = {2019},
abstract = {Efficient evaporation of water at low temperatures is
challenging due to its low saturation pressure. As a
consequence, the preferred evaporation by nucleate boiling
can only be achieved at the cost of high superheats.
However, low superheats can still lead to efficient
evaporation by thin-film evaporation. In this work, we
experimentally characterize the heat transfer for thin-film
evaporation on coated copper tubes, which use capillary
action to create a thin film on their surface. The overall
heat transfer through the tubes is determined at all filling
levels for evaporator inlet temperatures of 10, 15 and
20 °C with varied driving force. Our experiments reveal
that poor coatings suffer from dry-out at high driving
forces whereas tubes with good coatings remain fully wetted
even at high driving force. Furthermore, we show the impact
of surface properties on thin-film evaporation: high
porosity, surface extension and roughness promote the
creation of a thin film on the tube. Thereby, the heat
transfer UA-value is increased up to a factor of 10.},
cin = {IEK-10},
ddc = {690},
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:000454974700051},
doi = {10.1016/j.applthermaleng.2018.08.024},
url = {https://juser.fz-juelich.de/record/877620},
}