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Characterization of an n-octadecane PCS in a 0.5 m³ storage tank test facility

Caractérisation d’un coulis à changement de phase (PCS) n-octadécane dans une installation d’essai avec réservoir de stockage de 0,5 m³
: Biedenbach, M.; Poetzsch, L.; Gschwander, S.


International journal of refrigeration 104 (2019), pp.76-83
ISSN: 0140-7007
Journal Article
Fraunhofer ISE ()

Due to the increasing share of renewables in the energy system, research into thermal storage systems is becoming increasingly important. Phase change slurries (PCS) consisting of a phase change material (PCM) within a carrier fluid can be used as thermal storage. The advantage of phase change slurries is that they can be pumped through a hydraulic system independent of the state-of-matter of the emulsified phase change material. In this work a PCS containing 35 wt% Parafol 18 97 (Sasol Germany, n-octadecane, Tm = 27.3°C) as the PCM was characterized under realistic thermomechanical stress in a 0.5 m³ storage tank test facility. Measurements showed that at a temperature difference of 7 K (20°C – 27°C) the PCS was able to store 2.6 times more heat than water. Furthermore, the influence of PCS on the energy demand of a pump was investigated.