(134d) Innovations in High Performance Thermal Systems through Additive Manufacturing

It is desirable to enhance the performance of pool boiling systems to enable higher heat dissipation and to reduce the cost of the thermal equipment including, but not limited to distillation reboiler, desalination, steam generators, high-powered electronic systems, and refrigeration. Phase change heat transfer by boiling can be enhanced by introducing characteristics in solid-liquid interface through multidimensional coatings and geometries. For various manifestations, the pool boiling performance of a surface is dictated by higher critical heat fluxes (CHF) and heat transfer coefficients (HTC) at lower wall superheat. In this talk, I will describe the role of additive manufacturing in enhancing the pool boiling performance. Specifically, I will present our recent work on Fused Filament Fabricated (FFF) 3D printed copper with combined geometry and porosity that yielded higher heat transfer coefficients. Additionally, I will discuss our efforts of creating geometries through magnetically aligned metal inks that achieved 49.9% in CHF and 105% in HTC compared to plain copper surface. I will discuss the new fundamental mechanisms correlating wickability and altered three-phase contact angle that attributed to these enhancements.