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Heat transfer and pressure loss in flow evaporation of R134a.

Wärmeübergang und Druckverlust beim Strömungsverdampfen von R134a.

Author(s) : WETTERMANN M., STEINER D.

Summary

A comparison of data collected at p= 500 kilopascals reveals that the convection heat-transfer coefficient during two-phase flow (with no bubble formation) is about 30% greater with R134a than for R12; in flow boiling (with bubble formation) it is about 10% greater. Friction pressure losses of R134a are about 60% higher than for R12.

Details

Original title: Wärmeübergang und Druckverlust beim Strömungsverdampfen von R134a.
Record ID : 1998-0184
Languages: German
Source: DKV-Tagungsbericht 23. 1996 Leipzig.
Publication date: 1996/11/20
Document available for consultation in the library of the IIR headquarters only.

Links

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Indexing

Themes: CFCs;
HFCs;
Mass transfer;
Two-phase flow;
Blends
Keywords: R134a; Heat transfer coefficient; Friction; Heat transfer; R12; Two-phase mixture; Evaporation; Refrigerant; Pressure drop