Search for dissertations about: "refrigerant oil"
Found 4 swedish dissertations containing the words refrigerant oil.
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1. Properties of oil and refrigerant mixtures : lubrication of ball bearings in refrigeration compressors
Abstract : A refrigeration compressor contains highly loaded mechanical contacts that have to be lubricated. The lubricant used in refrigeration compressors consists of an oil and refrigerant mixture, and the refrigerant concentration can be up to 40 wt%. READ MORE
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2. Bearing lubrication of refrigeration screw compressors
Abstract : The bearings in a modern refrigeration screw compressor are lubricated with a mixture of oil and refrigerant. However, little or no published bearing life data is available for the new generation non-chlorinated refrigerants. READ MORE
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3. Elastohydrodynamic lubrication and lubricant rheology in refrigeration compressors
Abstract : The introductory chapter gives a general description of the lubrication of rolling element bearings in refrigeration compressors and rheological properties of oil-refrigerant mixtures. The influence of refrigerants on the viscosity, pressure-viscosity coefficient and film forming ability in a EHD-contact is described. READ MORE
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4. A mechanical model of an axial piston machine
Abstract : A mechanical model of an axial piston-type machine with a so-called wobble plate and Z-shaft mechanism is presented. The overall aim is to design and construct an oil-free piston expander demonstrator as a first step to realizing an advanced and compact small-scale steam engine system. READ MORE