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High performance, microarchitected, compact heat exchanger enabled by 3D printing

Tisha Dixit, Ebrahim Al-Hajri Orcid Logo, Manosh C Paul Orcid Logo, Perumal Nithiarasu Orcid Logo, S. Kumar

Applied Thermal Engineering, Volume: 210, Start page: 118339

Swansea University Author: Perumal Nithiarasu Orcid Logo

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Abstract

Additive manufacturing has created a paradigm shift in materials design and innovation, providing avenues and opportunities for geometric design freedom and customizations. Here, we report a microarchitected gyroid lattice liquid–liquid compact heat exchanger realized via stereolithography additive...

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Published in: Applied Thermal Engineering
ISSN: 1359-4311
Published: Elsevier BV 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa60550
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Abstract: Additive manufacturing has created a paradigm shift in materials design and innovation, providing avenues and opportunities for geometric design freedom and customizations. Here, we report a microarchitected gyroid lattice liquid–liquid compact heat exchanger realized via stereolithography additive manufacturing as a single ready-to-use unit. This lightweight (~240 kg/m3) compact heat exchanger (with conjoined headers), with an engineered porosity of 80% and a separating wall thickness of 300 μm, has a surface to volume ratio of 670 m2/m3. X-ray computed tomography imaging confirms a defect-free 3D printed heat exchanger. The thermohydraulic characteristics were experimentally measured using water as the working fluid. The measurements indicate that the heat exchanger evinces an overall heat transfer coefficient of 120 − 160W/m2K for hot fluid Reynolds number Reh in the range of 10 − 40. Additionally, finite element analysis was conducted to evaluate the thermo-hydraulic characteristics of the gyroid lattice heat exchanger. The experimental results show -a 55% increase in exchanger effectiveness for the additively manufactured gyroid lattice heat exchanger in comparisonto a thermodynamically equivalent, most-efficient, counter-flow heat exchanger at one tenth of its size. The superiority of our architected heat exchanger to extant work is also demonstrated.
Keywords: Additive manufacturing, Triply periodic minimal surfaces, Schoen’s gyroid lattice, Architected materials, Heat exhanger
College: Faculty of Science and Engineering
Funders: Authors would like to thank to Abu Dhabi National Oil Company (ADNOC) for providing the research grant (Award No: EX2016-000010). S. Kumar would like to thank the University of Glasgow for the start-up grant [Award No: 144690-01].
Start Page: 118339