Details
| Original language | English |
|---|---|
| Article number | 124774 |
| Number of pages | 19 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 218 |
| Early online date | 6 Oct 2023 |
| Publication status | Published - Jan 2024 |
Abstract
This article examines various additively manufactured heat exchangers for high-temperature applications. The heat exchangers differ in terms of their internal fin structure as well as optimizations in terms of manufacturing quality. Starting from a reference fin type, optimizations with focus on low pressure drop and high heat transfer are performed. The heat exchangers are investigated experimentally, focusing on the laminar flow regime between 60<Re<600. By means of a presented evaluation algorithm, the Nusselt numbers for the different fin types and designs are determined. The investigations show that even the smallest manufacturing deviations result in up to 70–120% higher f-factors and up to 30% higher Nu numbers. Taking these manufacturing deviations into account in the design process leads to very good agreement with the numerically determined values and the influence of surface roughness is comparatively small. Furthermore, the influence of internal heat radiation is of minor importance for the heat exchangers considered here.
Keywords
- Additive manufacturing, Experimental, Friction-factors, Heat exchanger, Heat transfer coefficients, High temperature
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
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In: International Journal of Heat and Mass Transfer, Vol. 218, 124774, 01.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental investigation of additively manufactured high-temperature heat exchangers
AU - Fuchs, Marco
AU - Bodemer, Julian
AU - Kabelac, Stephan
N1 - Funding Information: The authors would like to express their gratitude to the Federal Ministry for Economic Affairs and Climate Action (BMWK) based on a resolution of the German Bundestag and AiF Projekt GmbH , grant number “ KK5174901SN0 ” for supporting this research.
PY - 2024/1
Y1 - 2024/1
N2 - This article examines various additively manufactured heat exchangers for high-temperature applications. The heat exchangers differ in terms of their internal fin structure as well as optimizations in terms of manufacturing quality. Starting from a reference fin type, optimizations with focus on low pressure drop and high heat transfer are performed. The heat exchangers are investigated experimentally, focusing on the laminar flow regime between 60<Re<600. By means of a presented evaluation algorithm, the Nusselt numbers for the different fin types and designs are determined. The investigations show that even the smallest manufacturing deviations result in up to 70–120% higher f-factors and up to 30% higher Nu numbers. Taking these manufacturing deviations into account in the design process leads to very good agreement with the numerically determined values and the influence of surface roughness is comparatively small. Furthermore, the influence of internal heat radiation is of minor importance for the heat exchangers considered here.
AB - This article examines various additively manufactured heat exchangers for high-temperature applications. The heat exchangers differ in terms of their internal fin structure as well as optimizations in terms of manufacturing quality. Starting from a reference fin type, optimizations with focus on low pressure drop and high heat transfer are performed. The heat exchangers are investigated experimentally, focusing on the laminar flow regime between 60<Re<600. By means of a presented evaluation algorithm, the Nusselt numbers for the different fin types and designs are determined. The investigations show that even the smallest manufacturing deviations result in up to 70–120% higher f-factors and up to 30% higher Nu numbers. Taking these manufacturing deviations into account in the design process leads to very good agreement with the numerically determined values and the influence of surface roughness is comparatively small. Furthermore, the influence of internal heat radiation is of minor importance for the heat exchangers considered here.
KW - Additive manufacturing
KW - Experimental
KW - Friction-factors
KW - Heat exchanger
KW - Heat transfer coefficients
KW - High temperature
UR - http://www.scopus.com/inward/record.url?scp=85173465758&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2023.124774
DO - 10.1016/j.ijheatmasstransfer.2023.124774
M3 - Article
AN - SCOPUS:85173465758
VL - 218
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
M1 - 124774
ER -