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Adsorption dynamics of MOF coatings for waste heat driven cooling

: Laurenz, E.; Velte, A.; Kummer, H.; Füldner, G.; Schnabel, L.

Fulltext urn:nbn:de:0011-n-5934291 (569 KByte PDF)
MD5 Fingerprint: f385da05eafa5827ee2c0de68f583ed0
Created on: 9.7.2020

International Institute of Refrigeration -IIR-:
25th IIR International Congress of Refrigeration 2019. Proceedings : Montréal, Canada, August 24-30, 2019
Paris: IIR, 2019
ISBN: 978-2-36215-035-7
Paper 1669, 8 pp.
International Congress of Refrigeration (ICR) <25, 2019, Montreal>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
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

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 μm) 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.