Comparison of various flow maldistribution quantification methods in mini heat exchangers - Publikacja - MOST Wiedzy

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Comparison of various flow maldistribution quantification methods in mini heat exchangers

Abstrakt

The aim of study is to compare various flow maldistribution quantification methods, using velocity, mass flow rate, pressure, and temperature. An experimentally validated numerical study has been prepared and a heat exchanger with 34 semi-circular channels with a diameter of 3.1 mm has been tested. The minichannels were heated from the bottom with a heat flux of 50, 60, 70, and 80 kW/m2. The cases for various inlet velocities of 0.1, 0.2, 0.3, and 0.4 m/s have been tested. It results in a total of 16 cases with various heat flux and various inlet velocities of the water. Then, for every 16 cases, the flow maldistribution coefficients, widely used in the literature, have been calculated based on the velocity, pressure, and temperature profiles. The study shows that every method gives other results of the same parameter that should define the flow distribution in the heat exchanger in the same way. Hence, the ambiguities of fluid distribution conclusions in heat exchangers that can be found in the literature may be caused by a different interpretation of the flow maldistribution coefficient. A normalized flow maldistribution coefficient that gives the same results for all thermohydraulic parameters used has been proposed.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Scientific Reports nr 13,
ISSN: 2045-2322
Język:
angielski
Rok wydania:
2023
Opis bibliograficzny:
Dąbrowski P.: Comparison of various flow maldistribution quantification methods in mini heat exchangers// Scientific Reports -Vol. 13,iss. 1 (2023), s.11482-
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1038/s41598-023-38784-5
Źródła finansowania:
  • IDUB
Weryfikacja:
Politechnika Gdańska

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