Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Oil Circulation"”.
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De-risking thermal management challenges in automotive vehicles: oil circulation and thermal contact resistance
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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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
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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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Experimental and modeling study of lubricant effect on refrigerant distribution in microchannel evaporators
… automobile air conditioning systems where oil separator is less commonly used, the lubricant pumped out of the compressor is mixed with refrigerant and travels throughout the system. In this study, lubricant effect on refrigerant distribution in microchannel evaporators is investigated and …
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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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Charge-sensitive methods for the off-design performance characterization of organic Rankine cycle (ORC) power systems
… inventory is highlighted, so as the impact of oil circulation on the ORC performance rating. Following this experimental study, a complete modelling library is developed to replicate and extrapolate the system off-design behaviour. The intended goal is to create a true performance simulator, …
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Refrigerant flow distribution in vertical headers of reversible microchannel heat exchangers
… liquid-to-vapor density ratio. For refrigerant-oil mixture, the distribution is better at high oil circulation rate (OCR) because enough amount of oil generates lots of small bubbles/droplets and a layer of foams at the interface between liquid and vapor, which helps the mixing between the two …