INFLUENCE OF OIL ON REFRIGERANT EVAPORATOR PERFORMANCE. 2. LOCAL PRESSURE DROP.

[In Japanese. / En japonais.]

Type of article: Article

Summary

PRESSURE DROP MEASUREMENTS WERE TAKEN DURING THE FORCED CONVECTION EVAPORATION OF REFRIGERANT-OIL MIXTURES INSIDE A HORIZONTAL PIPE. STARTING WITH A LOW OIL CONCENTRATION OF 3%, THE AVERAGE PRESSURE DROP RISES SHARPLY AS THE CONCENTRATION IS INCREASED. THE PRESSURE DROP AT AN OIL CONCENTRATION OF 10% IS ALMOST TWICE THAT FOR AN OIL-FREE REFRIGERANT. EXPERIMENTAL DATA WAS COMPARED WITH EXISTING FRICTIONAL PRESSURE DROP EQUATIONS. GRONNERUD'S AND CHISHOLM'S CORRELATIONS REPRESENTING OIL-FREE DATA WERE MODIFIED IN ORDER TO PROVIDE MORE ACCURATE PREDICTIONS AND EXTEND THE APPLICATION TO REFRIGERANT-OIL MIXTURES.

Details

Original title: [In Japanese. / En japonais.]
Record ID : 1989-1288
Languages: Japanese
Source: Trans. JAR - vol. 5 - n. 2
Publication date: 1988
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: CFCs;
Lubricants
Keywords: Horizontal tube; Calculation; Measurement; R12; Oil; Evaporator; Pressure drop