Experimental study of sensible heat storage/retrieval in/from a nanofluid enclosed between concentric annular tubes

In this work, an experimental study has been carried out to quantify an amount of sensible heat storage/recovery in a specific nanofluid (distilled water +Titanium dioxide). The experimental results show, especially, the influence of nanoparticles mass concentration on the heat storage/recovery performance for a fixed mass flow rate (Γ= 300 kg/ℎ) of heat transfer fluid (HTF). This parameter contributes to the improvement of the heat transfer and therefore the enhancement of the sensible heat storage/retrieval.