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The characteristics of supercritical heat transfer of refrigerant R245fa in heating condition were investigated experimentally in a vertical bare tube with a diameter of 4 mm and a length of 840 mm at an constant pressure of 4 MPa, the local heat transfer coefficient for heat flux ranging from 20 to 100 kW/m2 and mass flux stabilizing at 400 kg/m2s. By changing the inlet temperature of test section, the refrigerant state changed to across pseudo-critical point. The experiment data were also compared with existing empirical correlations.
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Details
- Original title: Supercritical heat transfer characteristics in vertically upward flow.
- Record ID : 30021594
- Languages: English
- Source: 5th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants.
- Publication date: 2017/04/23
- DOI: http://dx.doi.org/10.18462/iir.tptpr.2017.0120
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Indexing
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Themes:
HFCs;
Heat transfer - Keywords: Supercritical state; R245fa; Organic Rankine cycle; Vertical tube; Heat transfer; Expérimentation
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