Validation of a new methodological approach for the selection of wire-coil inserts in thermal equipment
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AuthorGarcía Pinar, Alberto; Herrero Martín, Ruth; Pérez García, José; Solano Fernández, Juan Pedro
Knowledge AreaMecánica de Fluidos
SponsorsThe authors gratefully acknowledge to European Regional Development Fund and Ministerio de Ciencia e Innovación - Agencia Estatal de Investigación for the financial support of the project ALTES: “Active Latent Thermal Energy Storage”, Ref. PGC2018-100864-B-C21.
Realizado en/conUniversidad Politécnica de Cartagena
Bibliographic CitationA. García, R. Herrero-Martin, J. Pérez-García, J.P. Solano, Validation of a new methodological approach for the selection of wire-coil inserts in thermal equipment, Applied Thermal Engineering, Volume 218, 2023, 119273, ISSN 1359-4311, https://doi.org/10.1016/j.applthermaleng.2022.119273.
KeywordsMethodology for wire-coil selection
Heat transfer enhancement
Transition shape parameter (TSP)
Enhanced flat-plate solar collector
The use of wire-coils is especially relevant at low Reynolds numbers (below the critical number to turbulent flow in smooth tubes) according to its inherent positive features such as the advance of transition onset and, if they present suitable geometric characteristics, the establishment of an extended transitional flow in a critical Reynolds number interval [ReCL − ReCT ], with a predictable friction coefficient and Nusselt number. This paper presents the experimental validation of a new methodology based on the evaluation of a non-dimensional geometry-based parameter: the TSP (Transition Shape Parameter) that allows to predict the friction coefficient evolution with wire-coil inserts and enables to compute the extension of the transitional flow region. The close relationship between hydraulic and thermal performance of wire-coil inserts makes this methodology a valuable tool for selecting the most appropriate wire-coil geometry for a given tubular heat exchanger. It is observed ...
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