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Impact of the surface roughness of AISI 316L stainless steel on biofilm adhesion in a seawater-cooled tubular heat exchanger-condenser

Abstract: The present study evaluated biofilm growth in AISI 316L stainless steel tubes for seawater-cooled exchanger-condensers that had four different arithmetic mean surface roughness values ranging from 0.14 ?m to 1.2 ?m. The results of fluid frictional resistance and heat transfer resistance regarding biofilm formation in the roughest surface showed increases of 28.2% and 19.1% respectively, compared with the smoothest surface. The biofilm thickness taken at the end of the experiment showed variations of up to 74% between the smoothest and roughest surfaces. The thermal efficiency of the heat transfer process in the tube with the roughest surface was 17.4% greater than that in the tube with the smoothest surface. The results suggest that the finish of the inner surfaces of the tubes in heat exchanger-condensers is critical for improving energy efficiency and avoiding biofilm adhesion. This may be utilised to reduce biofilm adhesion and growth in the design of heat exchanger-condensers.

 Autoría: García S., Trueba A., Vega L., Madariaga E.,

 Fuente: Biofouling, 2016, 32(10), 1185-1193

Editorial: Taylor & Francis

 Fecha de publicación: 01/10/2016

Nº de páginas: 9

Tipo de publicación: Artículo de Revista

 DOI: 10.1080/08927014.2016.1241875

ISSN: 0892-7014