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  4. Adsorption dynamics of MOF coatings for waste heat driven cooling
 
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2019
Conference Paper
Title

Adsorption dynamics of MOF coatings for waste heat driven cooling

Abstract
Adsorption chillers are a promising option for environmentally friendly data centre cooling allowing for high energy efficiency. Waste heat from liquid cooled CPUs (~60 °C) drives the cooling for auxiliary loads (~20 °C) with heat rejection around 30 °C. Adsorption properties of the metal-organic frame work (MOF) aluminium fumarate largely outperform the state-of-the-art material silica gel at these temperatures. With adsorbent coatings, volume and mass specific cooling power may be increased to reduce specific costs. Samples were prepare with a binder-based aluminium fumarate coating in three different thicknesses (140-610 mm) and measured for adsorption dynamics with large-temperature-jump-experiments. Uptake-times (15-85%) are in the range of 9-78 s. On a full scale heat exchanger expected volume and adsorbent mass specific cooling powers are 200-700 W l-1 and 1.3-14 kW kg-1 - an increase to state-of-the-art of 3-10 times and >10 times at reasonable cooling COPs of 0.47-0.57.
Author(s)
Laurenz, Eric  
Velte, Andreas  
Kummer, Harry
Füldner, Gerrit  
Schnabel, Lena  
Mainwork
25th IIR International Congress of Refrigeration 2019. Proceedings  
Conference
International Congress of Refrigeration (ICR) 2019  
File(s)
Download (569.2 KB)
Rights
Use according to copyright law
DOI
10.24406/publica-fhg-408358
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Thermische Systeme und Gebäudetechnik

  • adsorbent coating

  • adsorption cooling

  • Aluminium Fumarate

  • Data Centre Cooling

  • energy efficiency

  • metal organic frameworks

  • energieeffizientes Gebäude

  • Lüftungs- und Klimatechnik

  • Thermische Speicher für Gebäude

  • Wärmepumpe

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