Multi-physical continuum models of thermochemical heat storage and transformation in porous media and powder beds—A review

Nagel, Thomas; Beckert, Steffen; Lehmann, Christoph; Gläser, Roger; Kolditz, Olaf

doi:10.1016/j.apenergy.2016.06.051

Cited by 60 publications

(19 citation statements)

References 184 publications

(236 reference statements)

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“…Thermochemical reactors using a hydrate/water pair can operate in two different modes: closed or open. Both have been studied in the literature, both numerically and experimentally [21,25]. In closed thermochemical systems [8,22,24,[26][27][28], the salt reacts with pure water vapor at fairly low pressure.…”

Section: Thermochemical Storage Involves a Reversible Chemical Reactimentioning

confidence: 99%

Experimental investigation of an open thermochemical process operating with a hydrate salt for thermal storage of solar energy: Local reactive bed evolution

2016

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Their high energy density and low heat losses between storage and recovery times make thermochemical processes a promising way to achieve long-term (seasonal) storage. Among the available reactor configurations, open systems using a packed bed of reactive solid are simple and efficient. This paper reports on the local operation and reactive bed behavior of such systems. Mass transfer changes within the reactive bed, which is the main limitation of such systems, was investigated using several state variables (reaction advancement, pressure drop across the salt bed and bed temperatures). Results from two experimental setups were analyzed: a small bench for mass transfer characterization, and a prototype at a larger scale. Both used SrBr 2 /H 2 O as reactive pair. A salt bed temperature analysis evidenced a reaction front moving within the reactive layer from the moist air inlet to its outlet. A mass transfer study showed marked changes in the reactive bed permeability during the reaction (by one order of magnitude) and with the reactive bed density (from 10 −9 to 10 −12 m 2 when density range from 300 to 600 kWh•m −3). During the reaction an asymmetric time course of the bed permeability was also highlighted: as f(X) in dehydration and f(1/X) in hydration.

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Section: Thermochemical Storage Involves a Reversible Chemical Reactimentioning

confidence: 99%

Experimental investigation of an open thermochemical process operating with a hydrate salt for thermal storage of solar energy: Local reactive bed evolution

2016

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“…. ) have been presented in the literature [18][19][20]. Most of the reported works refer to cooling or heat storage applications and only few models deal with THT applications, especially for those based on 2-salt cycles.…”

Section: Dynamic Modelmentioning

confidence: 99%

“…According to the assumption (e), the reaction kinetic depends on the reaction advancement and on the equilibrium drop. There are different kinetic model structures for solid-gas reaction available in the literature [20]. Arrhenius-type laws are the most frequently used.…”

Section: Kinetics Of the Solid/gas Reactionmentioning

confidence: 99%

Design of thermochemical heat transformer for waste heat recovery: Methodology for reactive pairs screening and dynamic aspect consideration

Michel

Clausse

2020

Energy

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Waste Heat Recovery in the industrial sector often requires to upgrade the temperature of the heat fluxes in order to make them useful for the process. Thermochemical Heat Transformer (THT) and especially 2-salt configuration, can play a major role as they can achieve high temperature lift when compared to alternative technologies. Despite various developments in recent years, this technology still suffers from several issues to make it fully attractive: rapid and reliable reactive salt selection, heat and mas transfer intensification, coupling with process heat demand, etc. This work is focused on a new methodology to achieve a rapid screening of salt pairs for a given application (i.e. source temperatures). Four criteria, based on thermodynamic considerations, are proposed allowing for an example to go from 4290 possibilities to only three most promising pairs at the end. A second part is dedicated to dynamic aspect considerations, exploring the robustness of the solution towards changes in heat transfer and kinetic coefficients as well as to changes in heat source temperatures. Knowledge on this last aspect is of great importance to achieve efficient integration to cover process heat demand.

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“…Òàê, êîìïîçèò SWS-1A (îêñèä àëþì³í³þ, ÿêèé ³ìïðåãîâàíî êàëüö³é õëîðèäîì) âèÿâèâ êðàù³ àä-ñîðáö³éí³ âëàñòèâîñò³ â ïîð³âíÿíí³ ç òðàäèö³é-íèìè ä³îêñèäîì êðåìí³þ òà îêñèäîì àëþì³-í³þ [5]. Â òîé aeå ÷àñ, ìàòåìàòè÷í³ ìîäåë³ ðîçãëÿäàþòü ïåðåâàaeíî îäíó ç³ ñòàä³é ïðîöåñ³â åê-ñïëóàòàö³¿ àäñîðáö³éíèõ òåïëîàêóìóëþþ÷èõ ïðè-ñòðî¿â, çîêðåìà, ïðîöåñè ìàñîïåðåíåñåííÿ ïðè àäñîðáö³¿ [6,7]. Àëãîðèòìè òà ìåòîäèêè ðîçðàõóíêó, ÿê³ äîçâîëÿþòü îö³íèòè êîðåëÿö³þ êîí-ñòðóêö³¿ òà åôåêòèâí³ñòü åêñïëóàòàö³¿ àêóìóëÿ-òîð³â òåïëîâî¿ åíåðã³¿ ðîçðîáëåí³ ïåðåâàaeíî äëÿ ºìí³ñíèõ ïðèñòðî¿â [8].…”

Section: àíàë³ç îñòàíí³õ äîñë³äAeåíü òà ïóáë³êàö³éunclassified

Algorithm for calculation of design and performance of open-type heat storage device based on composite adsorbents

Belyanovskaya¹,

Lytovchenko²,

Михайлов³

et al. 2019

CMACO

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Multi-physical continuum models of thermochemical heat storage and transformation in porous media and powder beds—A review

Cited by 60 publications

References 184 publications

Experimental investigation of an open thermochemical process operating with a hydrate salt for thermal storage of solar energy: Local reactive bed evolution

Experimental investigation of an open thermochemical process operating with a hydrate salt for thermal storage of solar energy: Local reactive bed evolution

Design of thermochemical heat transformer for waste heat recovery: Methodology for reactive pairs screening and dynamic aspect consideration

Algorithm for calculation of design and performance of open-type heat storage device based on composite adsorbents

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