Thermal-hydraulic evaluation of 3D printed microstructures

Experimental characterization of active magnetic regenerators constructed using laser beam melting technique

“…The increase in thermal effectiveness with increasing operational frequency at high utilisation values was also observed in Ref. [22]. One of the possible explanations is that in the passive EDH regenerator, with increasing operational frequency at U = 0.6, the fluid flow becomes sufficiently tortuous to induce the heat transfer between fluid and solid, resulting in increased thermal effectiveness.…”

“…The system performance is also limited by heat transfer effectiveness and pressure drop magnitude through the porous regenerators that are the core of the magnetocaloric device [8,15]. A significant amount of research effort has been devoted to the shaping of MCMs and optimization of flow channel geometry in solid regenerators [16][17][18][19][20][21][22][23][24][25]. While numerical studies suggest that the highest coefficient of performance, COP, at a fixed cooling power (Qcool) would be obtained with woven screens [16] or sufficiently thin parallel plates that have even spacing between them [18], experimental works have achieved best results using packed particle regenerators to this day [19,21].…”

“…Moreover, LBM enables manufacturing of regenerators with high surface area to volume ratio [32], which is desirable for enhanced heat transfer. Experimental results on the effectiveness of passive regenerators manufactured using the LBM technique have been reported [22]. There, the size of flow microchannels was between 200 µm and 300 µm.…”

“…There, the size of flow microchannels was between 200 µm and 300 µm. The regenerator material was stainless steel and the porosity was up to 78 % [22].…”

Nature—Inspired Flow Patterns for Active Magnetic Regenerators Assessed Using a 1D AMR Model

“…The possibility to manufacture regenerators using selective laser melting (Moore et al, 2013;Trevizoli et al, 2019) or laser beam melting (Wieland et al, 2018) opens an opportunity to investigate different geometries, such as fin-shaped rods or wavy channels, in line stacked and staggered fibers. It was proven that the regenerators, fabricated with selective laser melting, do not show degradation of MCE during 10 6 cycles of a changing magnetic field (Moore et al, 2013).…”