Void fraction measurement in subcooled forced convective boiling with refrigerant 12

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Experimental Heat Transfer; (USA)

DOI:https://doi.org/10.1080/08916159008946393· OSTI ID:6529468

Stangl, G; Mayinger, F ^[1]

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1. Lehrstuhl A fur Thermodynamik, Technische Universitat Munchen, D-8000 Munchen 2, Arcisstr. (DE)

This article presents investigations and results of void fraction and pressure drop of dichlordifluomethane (CCl{sub 2}F{sub 2}) in forced convective, subcooled boiling. The data were taken at different heat fluxes in a 12- to 25-bar pressure range, the mass fluxes have been varied from 500 to 3000 kg/m{sup 2}s with an inlet subcooling in the range from 10 to 50 K. The experiments have been conducted in an annular test channel with a 0.016-m inner diameter and a 0.03-m outer diameter. The inner tube of the annulus was heated by direct current. The void fraction data were gauged with a {gamma}-densitometer and a specially designed impedance void meter. The experimental results reveal that the void fraction is nearly constant from the onset of nucleation boiling to subcooling of about {Delta}T = 10 K. A method for predicting the void fraction based on the drift flux model is presented.

• OSTI ID: 6529468
• Journal Information: Experimental Heat Transfer; (USA), Journal Name: Experimental Heat Transfer; (USA) Vol. 3:3; ISSN 0891-6152; ISSN EXHTE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ALKANES
BOILING
CHLORINE COMPOUNDS
CONVECTION
CYLINDERS
ENERGY TRANSFER
FLUIDS
FLUORINE COMPOUNDS
FORCED CONVECTION
HALOGEN COMPOUNDS
HEAT FLUX
HEAT TRANSFER
HYDROCARBONS
MASS TRANSFER
METHANE
NUCLEATE BOILING
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
PRESSURE DROP
REFRIGERANTS
SUBCOOLED BOILING
VOID FRACTION
WORKING FLUIDS