French company TEMISTh, known for developing heat exchangers for extreme operating conditions, is increasingly turning to metal 3D printing to optimize production processes and overcome the design constraints of conventional manufacturing. In collaboration with machine manufacturer Eplus3D, TEMISTh uses the MPBF process (Metal Powder Bed Fusion) to produce complex structures from nickel-based alloys such as Inconel 718. The EP-M300 system, featuring two 500-watt lasers and a build volume of 300 × 300 × 450 mm, plays a key role in this effort.
By integrating computational fluid dynamics (CFD) and mechanical validation via finite element analysis (FEA), the company can produce high-performance components like cold plates with optimized flow channels. According to TEMISTh, the process reduces material consumption by up to 40 percent and significantly shortens production times compared to machining or welding-based methods. A major application is the EU-funded DESOLINATION project, which combines solar thermal desalination with supercritical CO₂. This requires maximum heat transfer at minimal flow resistance—challenges that conventional techniques struggle to meet.
Using 3D-printed heat exchanger cores made of Inconel 718—built in 130 hours with 50 µm layers and post-processed through heat treatment—TEMISTh achieved material densities exceeding 99.9 percent. The modular designs enabled the assembly of large-scale systems with dimensions up to 1.6 meters. Stress testing under real-world conditions confirmed structural integrity and alignment with simulation models.
Jean-Michel HUGO – CEO TEMISTh, commented: “For over three years, we have partnered with Eplus3D to integrate additive manufacturing into our production. Their teams both in China and Germany have consistently supported our unique requirements, ensuring a seamless installation with expert technical guidance and training-driven optimizations. We especially value their responsive technical team, which helps minimize production downtime. This collaboration has enabled us to fully control our heat exchanger manufacturing, refine design methods, and shorten delivery times.”
Martin Bizot, Account Manager at Eplus3D Tech GmbH, added: “Combining TEMISTh’s expertise in heat exchanger engineering with the precision and stability of our metal 3D printer unlocks new possibilities for advanced thermal management. This synergy will drive high-performance solutions that support economically viable decarbonization, redefining the future of energy-efficient industries.”
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