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In this paper, experiments on the flow boiling of pure CO2 and CO2-PAG oil mixtures are carried out using a 2.064 m long double-pipe counter-flow heat exchanger, in which the refrigerant CO2 flows inside the inner tube and the heat source water flows counter-currently in the outer annulus. A smooth copper tube and a micro-fin copper tube are used as the inner tube. The pressure drop and heat transfer characteristics of CO2 are measured in the ranges of the pressure of 3 to 5 MPa, the mass velocity of 360 to 650 kg/m2.s and the oil concentration of 0.04 to 7 wt%.
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- Original title: Experimental study on flow boiling of pure CO2 and CO2-oil mixtures inside horizontal smooth and micro-fin copper tubes.
- Record ID : 2005-2483
- Languages: English
- Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
- Publication date: 2004/08/01
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Indexing
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Themes:
Mass transfer;
CO2;
Lubricants - Keywords: Heat transfer coefficient; Microfin tube; Measurement; Heat transfer; Bare pipe; Binary mixture; Oil; Expérimentation; Boiling; CO2
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- Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
- Formats : PDF
View record