Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395345
Title: Effect of surface properties and flow distribution on fouling of heat transfer surfaces.
Author: Zettler, Hans Ulrich.
ISNI:       0000 0001 3577 0855
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2002
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Abstract:
Fouling and corrosion are probably the major engineering problems in process plants and in heat exchanger design and operation. Fouling is the formation of undesired deposits on heat transfer surfaces and corrosion is the deterioration and loss of material. The occurrence of these processes has strong adverse effects on the performance of heat exchangers and operating plants. In the present work, the influence of surface properties (surface free energy & surface roughness) on crystallisation fouling, biological fouling, wax deposition and corrosion has been investigated. In order to carry out the experimental investigations on crystallisation and biological fouling, the surfaces of several pairs of Alfa Laval M3 stainless steel heat exchanger plates have been modified. The experiments for the investigation on paraffin deposition on modified surfaces have been carried out using stainless steel tubes with various surface modifications, to change surface energy and roughness. The corrosion tests have been performed with modified carbon steel specimens. Test samples have been treated using different surface treatment technologies, namely ion beam implantation, magnetron & arc ion sputtering, carbo-nitriding & oxidising, electroplating, chemical vapour deposition, commercial coatings and Ni-P-PTFE coating. These treatment techniques have been used for the reduction of the surface free energy of the test surfaces. Two pairs of plates have been pickled and electropolished in order to achieve rougher and smoother surface conditions compared to the untreated plates.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.395345  DOI: Not available
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