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

被引:29
作者
Garcia, Sergio [1 ]
Trueba, Alfredo [1 ]
Vega, Luis M. [1 ]
Madariaga, Ernesto [1 ]
机构
[1] Univ Cantabria, Dept Sci & Tech Nav & Ship Construct, Santander, Spain
关键词
Biofilm; roughness; AISI 316L stainless steel; heat exchanger-condenser; seawater; ELECTROMAGNETIC-FIELDS; MITIGATION; FLOW; STRATEGIES; COMPONENTS; PIPES; PLANT; TUBES;
D O I
10.1080/08927014.2016.1241875
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
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 mu m to 1.2 mu 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.
引用
收藏
页码:1185 / 1193
页数:9
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