Efficacy of different antifouling treatments for seawater cooling systems

López-Galindo, Cristina; Casanueva, José F.; Nebot, Enrique

doi:10.1080/08927014.2010.531464

Cited by 27 publications

(13 citation statements)

References 15 publications

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“…The concentration of dissolved solids was 4.7 mg cm −2 , of which 74% was inorganic matter and 26% was organic matter (Figure 4). As in previous experiments (Eguía et al 2008;López-Galindo et al 2010;Trueba et al 2013), these results demonstrated that the hydraulic-thermal conditions in the untreated heat exchanger favour the formation of biofouling on the internal surfaces of the tubes. Therefore, the effectiveness of AF treatment using EMFs could be assessed under stringent conditions.…”

Section: Evolution Of Biofouling In the Af-untreated Control Tubessupporting

confidence: 51%

The effect of electromagnetic fields on biofouling in a heat exchange system using seawater

et al. 2015

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This article discusses the antifouling action of a continuous physical treatment process comprising the application of electromagnetic fields (EMFs) to seawater used as the refrigerant fluid in a heat exchanger-condenser to maintain the initial 'clean tube' condition. The results demonstrated that the EMFs accelerated the ionic nucleation of calcium and precipitation as calcium carbonate, which weakened the growing biofilm and reduced its adhesion capacity. Consequently, EMFs induced an erosive effect that reduced biofilm formation and fouling. This treatment allowed for the maintenance of significantly lower fouling factors in the treated tubes compared to a control group of untreated tubes, thereby leading to a higher heat transfer efficiency.

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Section: Evolution Of Biofouling In the Af-untreated Control Tubessupporting

confidence: 51%

The effect of electromagnetic fields on biofouling in a heat exchange system using seawater

et al. 2015

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“…The fluid frictional resistance (f) followed a characteristic sigmoidal curve for the four FVs tested, as defined in previous experiments López-Galindo et al 2010;Trueba et al 2013). According to Percival et al (1999), f increased as the viscous properties of the biofilm on the tube surface increased.…”

Section: Discussionmentioning

confidence: 99%

Influence of flow velocity on biofilm growth in a tubular heat exchanger-condenser cooled by seawater

et al. 2015

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The influence of flow velocity (FV) on the heat transfer process in tubes made from AISI 316L stainless steel in a heat exchanger-condenser cooled by seawater was evaluated based on the characteristics of the resulting biofilm that adhered to the internal surface of the tubes at velocities of 1, 1.2, 1.6, and 3 m s(-1). The results demonstrated that at a higher FV, despite being more compact and consistent, the biofilm was thinner with a lower concentration of solids, and smoother, which favoured the heat transfer process within the equipment. However, higher velocities increase the initial cost of the refrigerating water-pumping equipment and its energy consumption cost to compensate for the greater pressure drops produced in the tube. The velocity of 1.6 m s(-1) represented the equilibrium between the advantages and disadvantages of the variables analysed for the test conditions in this study.

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“…Bleach is also commonly used as an antifoulant at industrial seawater cooling systems, affecting both micro-and macro-organisms (e.g. Lopez-Galindo et al, 2010;Moreira et al, 2010;Piola et al, 2010). Only in Australia, more than 13,000 tonnes per year of bleach is used by industries in the different areas of water and wastewater utility business (Alvarez-Gaitan et al, 2011).…”

Section: Introductionmentioning

confidence: 98%