Heat Transfer and Storage in Architectured Composite Heatsinks
Senior Personnel: P. Shamberger (PI), J. Felts (Co-PI), A. Elwany (Co-PI)
We propose to I) investigate fundamental aspects of conductive heat transfer and storage in 3D architectured thermal energy storage (TES) composites, and II) develop the necessary theory, tools, and correlations to design optimized composite thermal energy storage structures. This task will consist of three parallel activities: 1) developing analytical solutions to heat transfer in thermal storage composites under different limiting assumptions, 2) fabricating 3D architectured thermal storage composites with variable geometries using additive manufacturing (AM) to demonstrate feasibility and to test analytically predicted relationships, and 3) validating theoretical predictions (interfacial heat flux and temperature rise) and developing scaling correlations as a function of composite structure and material properties using coupled numerical and experimental observations. The anticipated outcome of these tasks is a set of design guidelines for thermal storage composites,
valid across a range of geometries, orientations, and material thermophysical properties. Such design guidelines will enable order of magnitude improvements in cooling power densities for distributed TES components.
a) Varying pitches from 0.8 to 9 mm with constant metal volume fraction (30%) for lamellar metal/PCM composites. b) Temperature curves for composites with pitches 0.8–8 mm for a constant heat flux of 1.45 W cm-2. c–f) IR camera snapshots for 2, 4, 6, and 8 mm, respectively. The red lines are isotherms plotted to guide the eye, and all temperature profiles are taken at roughly halfway through the melting process.
A. Tamraparni, A. Hoe*, M. Deckard*, C. Zhang, P.J. Shamberger, A. Elwany, J. Felts. Design and optimization of lamellar phase change composites for thermal energy storage, Adv. Eng. Mtls., 2001052 (2020). doi: 10.1002/adem.202001052.
P.J. Shamberger, A. Hoe*, M. Deckard*, M. T. Barako. Dynamics of Melting in a Slab under Harmonic Heating and Convective Cooling Boundary Conditions, J. Appl. Phys., 128, 105102 (2020). doi: 10.1063/5.0016060.
A. Hoe*, M. Deckard*, A. Tamraparni, A. Elwany, J. Felts, P.J. Shamberger. Conductive Heat Transfer in Lamellar Phase Change Material Composites, Appl. Therm. Eng. 178, 115553 (2020). doi: 10.1016/j.applthermaleng.2020.115553