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Corrosion prevention methods in indirect systems with secondary refrigerants
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-8516-0609
2010 (English)Conference paper (Other academic)
Abstract [en]

Secondary refrigerants are aqueous solutions of organic or inorganic salts used in indirect refrigeration systems to transfer heat. Water is known for its corrosive character and secondary refrigerants based on aqueous solutions have the same tendency. The most important corrosion factors are: type of secondary refrigerant, fluid velocity, pH, concentration, temperature, dissolved oxygen and scaling behaviour. Nevertheless, it is possible to minimize corrosion problems. There are several aspects which need to be taken into the consideration while working with the secondary refrigerants e.g. design of system, selection of secondary refrigerant, corrosion inhibitors and compatible materials used in the installation. The methods of system cleaning, refrigerant charging and deaeration procedures are also extremely important. The purpose of this paper is to present corrosion problems and provide a list important aspects related to designing, preparing and maintaining of indirect systems. Moreover, it introduces the traditional and alternative methods of corrosion protection of indirect systems with secondary refrigerants.

Place, publisher, year, edition, pages
Keyword [en]
corrosion, secondary refrigerant, corrosion inhibitor, galvanic couple, corrosion factors
National Category
Engineering and Technology Energy Engineering
URN: urn:nbn:se:kth:diva-65583OAI: diva2:483543
International Conference on Sustainable Refrigeration and Heat Pump Technology. Stockholm, Sweden. June 13-16, 2010
Influence of adsorption corrosion inhibitors and other additives on heat transfer and thermophysical
QC 20120425Available from: 2012-01-25 Created: 2012-01-25 Last updated: 2012-04-25Bibliographically approved

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