Lubricity of environmentally friendly HFO-1234yf refrigerant Academic Article

abstract

• Global warming concerns have triggered the interest in alternative refrigerants for air-conditioning and refrigeration compressors. Newly developed refrigerant HFO-1234yf is an attractive and environmentally friendly candidate to replace existing hydrofluorocarbon refrigerants, such as R-134a. Herein, the tribological compatibility of gray cast iron material with this new refrigerant was investigated under aggressive unlubricated conditions. HFO-1234yf exhibits excellent performance compared to R-134a due to the formation of a fluorine-containing protective tribolayer on the topmost surface as X-ray photoelectron spectroscopy (XPS) analysis, inside and outside the wear tracks, revealed. The morphology of the layer was also studied using scanning electron microscopy (SEM) studies. 2012 Elsevier Ltd.

authors

• Polycarpou, Andreas

published proceedings

• TRIBOLOGY INTERNATIONAL

author list (cited authors)

• Akram, M. W., Polychronopoulou, K., & Polycarpou, A. A.

citation count

• 24

complete list of authors

• Akram, M Wasim||Polychronopoulou, Kyriaki||Polycarpou, Andreas A

publication date

• January 2013

publisher

• Elsevier  Publisher

published in

• Tribology International  Journal

keywords

• Compressor
• Green Tribology
• Refrigerant
• Xps

Digital Object Identifier (DOI)

• 10.1016/j.triboint.2012.07.013

start page

• 92

end page

• 100

volume

• 57

URL

• http://dx.doi.org/10.1016/j.triboint.2012.07.013