To improve the compactness of a heat exchanger, a porous structure is used. In such conditions, the quality of the heat exchange increases considerably. However, this intensification leads to an important rise of the pressure drop. So, it is necessary to determine the geometrical parameters of the porous media in order to obtain the optimum heat transfer with low pressure drop. The aim of the study is to apply the above concept to the heat exchangers which are used in automobile industry, in order to reduce their dimensions and weights. The authors choose to study one type of heat exchangers used in automobile industry, i.e. a liquid-gaz (radiator). An experimental set-up and a methodology are presented. Friction factors of the metal foams and the Colburn module are determined. The results obtained with six heat exchanger prototypes show some application opportunities, espcially in the case at low Reynolds number.
Porous compact heat exchangers using metallic foams
Poröse, unter Verwendung von Metallschaum hergestellte kompakte Wärmetauscher
1999
8 Seiten, 8 Bilder, 1 Tabelle, 3 Quellen
Conference paper
English
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