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- Title
Experimental investigations into the impact of the void fraction on the condensation characteristics of R134a refrigerant in minichannels under conditions of periodic instability.
- Authors
KUCZYŃSKI, WALDEMAR; CHARUN, HENRYK
- Abstract
This paper present the results of experimental investigations of condensation of R134a refrigerant in pipe minichannels with internal diameters 0.64, 0.90, 1.40, 1.44, 1.92 and 3.30 mm subject to periodic pressure instabilities. It was established that as in conventional channels, the displacement velocity of the pressure instabilities distinctly depends on the frequency of their hydrodynamic generation. The void fraction distinctly in?uences the velocity of the pressure instabilities. The form of this relationship depends on the internal diameter of the minichannels and on the method of calculating the void fraction.
- Subjects
THERMODYNAMICS of pipe; CONDENSATION; REFRIGERANTS; HYDRODYNAMICS; ATMOSPHERIC pressure; SPEED; PHYSICS experiments
- Publication
Archives of Thermodynamics, 2011, Vol 32, Issue 2, p21
- ISSN
1231-0956
- Publication type
Article