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  4. Zeolite NaY-Copper Composites Produced by Sintering Processes for Adsorption Heat Transformation
 
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2021
Journal Article
Titel

Zeolite NaY-Copper Composites Produced by Sintering Processes for Adsorption Heat Transformation

Titel Supplements
Technology, Structure and Performance
Abstract
In adsorption heat pumps, the adsorbent is typically combined with heat conducting structures in order to ensure high power output. A new approach for the direct integration of zeolite granules into a copper structure made of short copper fibers is presented here. Zeolite NaY granules with two different grain sizes are coated with copper fibers and powder and sintered to larger structures. The sorption dynamics of these structures were measured and evaluated in terms of heat and mass transfer resistances and compared to the loose grain configuration of the same material. We found that the thermal conductivity of such a composite structure is approximately10 times higher than the thermal conductivity of an adsorbent bed with NaY granules. Sorption equilibrium measurements with a volumetric method indicate that the maximum uptake is not altered by the manufacturing process. Furthermore, the impact of the adsorbent-metal structure on the total thermal mass of an adsorption heat exchanger is evaluated. The price of the superior thermal conductivity is a 40% higher thermal mass of the adsorption heat exchanger compared to the loose grain configuration.
Author(s)
Velte, Andreas
Fraunhofer-Institut für Solare Energiesysteme ISE
Weise, Jörg
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Laurenz, Eric
Fraunhofer-Institut für Solare Energiesysteme ISE
Baumeister, Joachim
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Füldner, Gerrit
Fraunhofer-Institut für Solare Energiesysteme ISE
Zeitschrift
Energies
DOI
10.3390/en14071958
File(s)
N-634224.pdf (5.73 MB)
Language
English
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Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Fraunhofer-Institut für Solare Energiesysteme ISE
Tags
  • adsorption heat pump

  • zeolite

  • Sintering

  • Composites

  • Thermische Systeme und Gebäudetechnik

  • energieeffizientes Gebäude

  • Thermische Speicher für Gebäude

  • Wärmepumpe

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