Heat Transfer in Double Pipe Heat Exchangers With Small Tube Spacing
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00381024" target="_blank" >RIV/68407700:21220/25:00381024 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1115/1.4066930" target="_blank" >https://doi.org/10.1115/1.4066930</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/1.4066930" target="_blank" >10.1115/1.4066930</a>
Alternative languages
Result language
angličtina
Original language name
Heat Transfer in Double Pipe Heat Exchangers With Small Tube Spacing
Original language description
In this work, the heat transfer in double pipe heat exchangers (DPHEs) with small tube spacing is analyzed. This type of heat transfer is generally described in many literary sources; however, in laminar flow, the resulting values of the theoretical equations differ. Moreover, the small spacing of the pipes can affect the fluid flow and subsequent heat transfer. The suitability of using available theoretical methods for the design of double pipe heat exchangers (the Stephan, VDI, and Baehr methods) was evaluated. A series of experiments was carried out on a double pipe heat exchanger with a tube spacing of 1.4 mm. The experimentally determined value of the heat transfer coefficient (HTC) was up to two times higher in comparison with the values calculated according to theoretical methods. The relative increase was more significant for the lower Reynolds number values. At the same time, the difference of the wall temperature along the circumference of the outer tube was detected. This phenomenon was theoretically analyzed and can be explained by tube misalignment in the small tube spacing. The procedure of quantification of this effect was proposed. This effect may cause an inhomogeneity of the media flow and temperature distribution and, as a result, increase the performance of the heat exchanger by tens of percent.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Fluids Engineering
ISSN
0098-2202
e-ISSN
1528-901X
Volume of the periodical
147
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
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UT code for WoS article
001435510600003
EID of the result in the Scopus database
2-s2.0-105001322539