Concept of mechanocaloric granular material made from shape memory alloy

Shape memory alloys (SMAs) are promising mechanocaloric materials for the creation of innovative heating/cooling systems. The present paper proposes a simple concept “porous” SMA material in form two-dimensional (2D) “granular” system. basic idea is to place cylinders parallel and contact, thus creating 2D granular material, with fluid circulation third dimension (i.e. longitudinal direction cylinders). study dedicated validation character such system subjected confined compression. First, experiments were conducted using superelastic nickel-titanium rods various diameters, enabling us create different bidispersity levels medium. Infrared thermography was used analyze temperature changes within cylinders. Second, air as circulating sake validation. Comparison between showed that nearly-monodisperse configuration could be advantageous optimize concept.