b'Advanced Manufacturing ofResearchers combined advanced computational modeling, digital Heat Pipes with Connectivitydesign, and three-dimensional printing to create high-performance to Thermoelectrics heat pipes, heat exchangers, and thermoelectric devices.T hermoelectric devices are solid-state devices used to convert thermal energy to electrical energy. However, current deployment of these devices is limited by high manufacturing costs and low efficiency. Integrating a heat pipe heat exchanger with the thermoelectric platform can eliminate thermal contact resistances and increase device performance. Additive manufacturing of the heat exchanger enables the fabrication of a compact device with an optimized configuration that PROJECT NUMBER:cannot be readily produced by traditional manufacturing methods. The heat exchanger 20A44-065 topology features a triply periodic minimal surface that offers the potential for lighter TOTAL APPROVED AMOUNT:weight structures. The hot side of the heat exchanger consists of a triply periodic $1,084,000 over 3 years minimal surface printed in 316L stainless steel using a laser powder bed fusion process, whereas the cold side of the heat exchanger features a triply periodic minimal surface PRINCIPAL INVESTIGATOR:structure printed with 13X zeolite using a digital light processing printer. Both laser Donna Guillen powder bed fusion and digital light processing printers construct the component in a CO-INVESTIGATORS: layer-by-layer manner. Heat pipes transfer heat through the triply periodic minimal Adrian Wagner, INLsurface structure to the thermoelectric devices. Piyush Sabharwall, INL The n-type titanium-nickel-tin thermoelectric legs were manufactured via an additive Troy Unruh, INLmanufacturing process of ink-extrusion, whereas the p-type legs were fabricated by COLLABORATORS: spark plasma sintering. The additive manufacturing process for creating the half-Heusler Boise State University titanium-nickel-tin thermoelectrics consisted of ink printing titanium nickel lattices, Northwestern University debinding and thermal sintering, and infiltrating tin. The technique was developed in collaboration with Northwestern University. Zeolite binder integration using either bentonite or kaolin. Inset upper right: digital light processing printer used to fabricate an optimized geometry for adsorption.80'