Global ETD Search
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Showing 1 to 10 of 10 for “"Oil retention"”.
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Investigation of oil retention and pressure drop in suction lines using R134a with AB ISO 32
In refrigeration systems, a small quantity of oil, meant for compressor lubrication, is removed from the compressor during operation, by the high velocity refrigerant vapor exiting it, which forms a mixture with the oil. This circulating refrigerant/lubricant mixture affects the system performance …
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Oil retention and pressure drop of R1234yf and R134a with POE ISO 32 in suction lines
… of the refrigeration systems a small quantity of oil is carried out of the compressor by high velocity vapor leaving the compressor discharge in the form of a mixture with the refrigerant. The circulating liquid which is a mixture of oil and refrigerant has the highest viscosity in the suction …
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Oil Retention and Pressure Drop in Horizontal and Vertical Suction Lines with R410A / POE ISO 32
… to the compressor has the largest potential for oil retention. This paper presents results from an experimental apparatus that has been constructed to circulate POE (polyolester) oil and R410A at a controlled mass flux, OCR (oil in circulation ratio), and apparent superheat, and to directly …
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Investigation of oil retention and pressure drop in suction lines using R1234yf, R134a and R410A with POE ISO 100
… refrigeration systems require the presence of oil, primarily for the purpose of lubrication. A small portion of this oil is transported out of the compressor by the high velocity refrigerant vapor exiting the compressor or by the refrigerant forming an equilibrium mixture with the oil. This …
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Oil flow from compressor valve to discharge tube
Oil existence is important for compressor operation because it provides lubrication, cooling and sealing. But the discharge process of the compressor inevitably entrains some oil in the refrigerant vapor, which makes oil leave compressor and circulate in the system. For better heat transfer and …
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Investigation of Plasma Electrolytic Oxidation (PEO) Coated Bores in Internal Combustion Engines
… piston-to-bore clearance distances, increased oil retention, and a small dispersed surface porosity morphology created a tribological environment which produced improved wear resistance of PEO coatings in cylinder bores.
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Effect of surface topography upon the quality of autobody panels
… experimental activity. The phenomenon of oil retention of a surface and friction were studied and novel 3D surface topography parameters were deployed. Then, the experimental results were correlated with the surface topography parameters in order to understand how surface topography is …
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Distribution of refrigerant and lubricant in automotive air conditioning systems
… the system with refrigerant. At different oil concentrations, the circulating mixture exhibits different properties, which affects the characteristics of heat transfer, pressure drop and mass retention in each component. The purpose of this thesis is to measure and model refrigerant and …
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Low oil-water ratio invert emulsion mud for unconventional shale reservoirs
… and management of the traditional diesel oil-based mud used for drilling difficult formations such as shale, there is the necessity to develop an environmentally friendly drilling mud. Vegetable oils such as Jatropha have proven to be a comparable alternative to diesel oil. However, there …
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Commissioning of experimental facility for oil circulation rate measurements in a vapor compression system
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms