Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-23238
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dc.contributor.authorFumey, Benjamin-
dc.contributor.authorBorgschulte, Andreas-
dc.contributor.authorStoller, Sascha-
dc.contributor.authorFricker, Reto-
dc.contributor.authorKnechtle, Ralf-
dc.contributor.authorKaestner, Anders-
dc.contributor.authorTrtik, Pavel-
dc.contributor.authorBaldini, Luca-
dc.date.accessioned2021-09-30T15:16:07Z-
dc.date.available2021-09-30T15:16:07Z-
dc.date.issued2022-01-
dc.identifier.issn0017-9310de_CH
dc.identifier.issn1879-2189de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/23238-
dc.description.abstractHeat release from absorption storage heat pump by means of absorption of water vapor into aqueous sodium hydroxide is limited by uptake kinetics affecting temperature gain, as well as power- and energy density of the method. Earlier studies pinpoint that natural diffusion alone is not sufficient to reach higher uptake rate, and that the surface to bulk exchange has to be enforced. In this paper, different technical solutions to this problem for the heat storage application are introduced and studied by neutron imaging, enabling visual observation of water vapor uptake and diffusion. The experiments brought to the fore that the buoyancy changes associated with water uptake may be utilized to markedly enhance kinetics. This concept was applied on a vertically installed spiral finned tube operating as heat and mass exchanger for the absorption storage heat pump, also referred to as sorption heat storage. By flooding the space between the spiral fin with absorbent, water absorption into the vertical surface leads to a buoyancy driven movement of the liquid, supplying unspent aqueous NaOH to the vertical surface and exchanging it with the diluted liquid. This is found to increase the rate of absorption markedly. Under realistic heat storage specific operating conditions, a temperature gain of 12.5 K, an active area specific power of 1.28 kW/m2 and an energy density of 243 kWh/m3 in respect to the volume of charged absorbent (greatest volume) is reached. It is proposed that carful design of the spiral finned tube to enhance buoyancy movement will further improve overall sorption heat storage performance.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofInternational Journal of Heat and Mass Transferde_CH
dc.rightshttp://creativecommons.org/licenses/by/4.0/de_CH
dc.subjectLiquid absorptionde_CH
dc.subjectNeutron imagingde_CH
dc.subjectLong-term heat storagede_CH
dc.subjectConcentration-based convectionde_CH
dc.subjectHeat and mass exchanger designde_CH
dc.subject.ddc621.04: Energietechnikde_CH
dc.titleEnhanced gas-liquid absorption through natural convection studied by neutron imagingde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementArchitektur, Gestaltung und Bauingenieurwesende_CH
zhaw.organisationalunitInstitut Bautechnologie und Prozesse (IBP)de_CH
dc.identifier.doi10.1016/j.ijheatmasstransfer.2021.121967de_CH
dc.identifier.doi10.21256/zhaw-23238-
zhaw.funding.euNode_CH
zhaw.issue121967de_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume182de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
Appears in collections:Publikationen Architektur, Gestaltung und Bauingenieurwesen

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Fumey, B., Borgschulte, A., Stoller, S., Fricker, R., Knechtle, R., Kaestner, A., Trtik, P., & Baldini, L. (2022). Enhanced gas-liquid absorption through natural convection studied by neutron imaging. International Journal of Heat and Mass Transfer, 182(121967). https://doi.org/10.1016/j.ijheatmasstransfer.2021.121967
Fumey, B. et al. (2022) ‘Enhanced gas-liquid absorption through natural convection studied by neutron imaging’, International Journal of Heat and Mass Transfer, 182(121967). Available at: https://doi.org/10.1016/j.ijheatmasstransfer.2021.121967.
B. Fumey et al., “Enhanced gas-liquid absorption through natural convection studied by neutron imaging,” International Journal of Heat and Mass Transfer, vol. 182, no. 121967, Jan. 2022, doi: 10.1016/j.ijheatmasstransfer.2021.121967.
FUMEY, Benjamin, Andreas BORGSCHULTE, Sascha STOLLER, Reto FRICKER, Ralf KNECHTLE, Anders KAESTNER, Pavel TRTIK und Luca BALDINI, 2022. Enhanced gas-liquid absorption through natural convection studied by neutron imaging. International Journal of Heat and Mass Transfer. Januar 2022. Bd. 182, Nr. 121967. DOI 10.1016/j.ijheatmasstransfer.2021.121967
Fumey, Benjamin, Andreas Borgschulte, Sascha Stoller, Reto Fricker, Ralf Knechtle, Anders Kaestner, Pavel Trtik, and Luca Baldini. 2022. “Enhanced Gas-Liquid Absorption through Natural Convection Studied by Neutron Imaging.” International Journal of Heat and Mass Transfer 182 (121967). https://doi.org/10.1016/j.ijheatmasstransfer.2021.121967.
Fumey, Benjamin, et al. “Enhanced Gas-Liquid Absorption through Natural Convection Studied by Neutron Imaging.” International Journal of Heat and Mass Transfer, vol. 182, no. 121967, Jan. 2022, https://doi.org/10.1016/j.ijheatmasstransfer.2021.121967.


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