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Energies 2015, 8(8), 8431-8446; doi:10.3390/en8088431

A New Adsorbent Composite Material Based on Metal Fiber Technology and Its Application in Adsorption Heat Exchangers

1
Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, D-79110 Freiburg, Germany
2
Fraunhofer Institute for Manufacturing and Advanced Materials IFAM, Branch Lab Dresden, Winterbergstraße 28, D-01277 Dresden, Germany
3
SorTech AG, Zscherbener Landstr. 17, D-06126 Halle/Saale, Germany
4
Karlsruhe Institute of Technology (KIT), Institute of Fluid Machinery (FSM), Kaiserstr. 12, 76131 Karlsruhe, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Chi-Ming Lai
Received: 10 June 2015 / Revised: 28 July 2015 / Accepted: 30 July 2015 / Published: 10 August 2015
View Full-Text   |   Download PDF [843 KB, uploaded 10 August 2015]   |  

Abstract

In order to achieve process intensification for adsorption chillers and heat pumps, a new composite material was developed based on sintered aluminum fibers from a melt-extraction process and a dense layer of silico-aluminophosphate (SAPO-34) on the fiber surfaces. The SAPO-34 layer was obtained through a partial support transformation (PST) process. Preparation of a composite sample is described and its characteristic pore size distribution and heat conductivity are presented. Water adsorption data obtained under conditions of a large pressure jump are given. In the next step, preparation of the composite was scaled up to larger samples which were fixed on a small adsorption heat exchanger. Adsorption measurements on this heat exchanger element that confirm the achieved process intensification are presented. The specific cooling power for the adsorption step per volume of composite is found to exceed 500 kW/m3 under specified conditions. View Full-Text
Keywords: adsorption heat exchanger (AdHEX); adsorption kinetics; SAPO-34; partial support transformation (PST); metal fibers; melt-extraction process adsorption heat exchanger (AdHEX); adsorption kinetics; SAPO-34; partial support transformation (PST); metal fibers; melt-extraction process
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wittstadt, U.; Füldner, G.; Andersen, O.; Herrmann, R.; Schmidt, F. A New Adsorbent Composite Material Based on Metal Fiber Technology and Its Application in Adsorption Heat Exchangers. Energies 2015, 8, 8431-8446.

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