Comparison of louvered plate-fin heat exchangers made via additive manufacturing

Michael Bichnevicius, David Saltzman, Stephen P. Lynch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Additive manufacturing (AM) can enable complex and novel designs that are otherwise infeasible with traditional metal manufacturing techniques. In low-volume production scenarios, particularly for specialized applications which can benefit from customized designs, traditional metal manufacturing techniques may be limited by costs associated with tooling. The ability to produce novel designs is particularly interesting in heat exchanger (HX) design where performance is often largely based on the achievable geometry. However, consequences of the AM process such as surface roughness, deviation from specified dimensions, and defects such as cracks and voids could also affect HX performance. These effects may vary between identically designed AM parts based on AM machine settings. The goal of this work is to gain a better understanding of the performance variations across several different implementations of the same heat exchanger design. More specifically, the objective of this work is to experimentally compare the thermal and hydraulic performances of a traditionally manufactured, stamped-aluminum aircraft oil cooler and three geometrically equivalent, additively manufactured counterparts. Compared to the traditionally manufactured heat exchanger, the AM HXs exhibited significantly higher air-side pressure loss and higher heat transfer despite having nominally similar geometries. Between AM HXs, there were slight differences in surface roughness characteristics based on optimal profilometry measurements. In addition, the thickness of the air-side fins varied as much as 15 percent between the AM HXs. The net effect, without the contribution of each cause clear, was higher air-side pressure loss and slightly higher heat transfer for the AM HX with thicker fins. This study indicates that functional heat exchangers built using AM vary in performance even when the same digital model is used to print them, and that AM HXs as a group perform considerably differently than their traditional counterparts. Thus, there is a need to account for anticipated surface roughness, geometric deviations, and potential defects when designing HXs. Proper consideration could result in improved thermal performance for future heat exchangers.

Original languageEnglish (US)
Title of host publicationAdvanced Manufacturing
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791852019
DOIs
StatePublished - Jan 1 2018
EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
Duration: Nov 9 2018Nov 15 2018

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume2

Other

OtherASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
CountryUnited States
CityPittsburgh
Period11/9/1811/15/18

Fingerprint

3D printers
Heat exchangers
Surface roughness
Air
Heat transfer
Defects
Profilometry
Fins (heat exchange)
Geometry
Metals

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Bichnevicius, M., Saltzman, D., & Lynch, S. P. (2018). Comparison of louvered plate-fin heat exchangers made via additive manufacturing. In Advanced Manufacturing (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 2). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2018-87941
Bichnevicius, Michael ; Saltzman, David ; Lynch, Stephen P. / Comparison of louvered plate-fin heat exchangers made via additive manufacturing. Advanced Manufacturing. American Society of Mechanical Engineers (ASME), 2018. (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)).
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Bichnevicius, M, Saltzman, D & Lynch, SP 2018, Comparison of louvered plate-fin heat exchangers made via additive manufacturing. in Advanced Manufacturing. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 2, American Society of Mechanical Engineers (ASME), ASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018, Pittsburgh, United States, 11/9/18. https://doi.org/10.1115/IMECE2018-87941

Comparison of louvered plate-fin heat exchangers made via additive manufacturing. / Bichnevicius, Michael; Saltzman, David; Lynch, Stephen P.

Advanced Manufacturing. American Society of Mechanical Engineers (ASME), 2018. (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Bichnevicius M, Saltzman D, Lynch SP. Comparison of louvered plate-fin heat exchangers made via additive manufacturing. In Advanced Manufacturing. American Society of Mechanical Engineers (ASME). 2018. (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)). https://doi.org/10.1115/IMECE2018-87941