This paper deals with the analysis of the nucleate pool boiling regime in the case of a copper plate surface immersed in a FC72 fluid at saturation condition. The apparatus has been tested and calibrated by using water and by comparing the experimental data with four correlations. The minimum prediction error is 12,25%. After that the effect of the lateral confinement with FC72 has been studied by reducing the diameter of the vessel which contains the pool. The investigated diameters have been (72, 64, 52, 42, 34 mm). Besides for each diameter the effect of the immersion depth on the heat transfer coefficient has been evaluated. These first preliminary data shows that an enhancement of the theoretically expected heat transfer coefficient have been measured for each diameter except for the diameter 42 mm, where a drastic deterioration of the heat transfer has been observed. A dependence of the CHF on the immersion depth has been observed for little diameters.

Experimental analysis of boiling in saturated FC72 Confined pools: preliminary results

FILIPPESCHI, SAURO
2009

Abstract

This paper deals with the analysis of the nucleate pool boiling regime in the case of a copper plate surface immersed in a FC72 fluid at saturation condition. The apparatus has been tested and calibrated by using water and by comparing the experimental data with four correlations. The minimum prediction error is 12,25%. After that the effect of the lateral confinement with FC72 has been studied by reducing the diameter of the vessel which contains the pool. The investigated diameters have been (72, 64, 52, 42, 34 mm). Besides for each diameter the effect of the immersion depth on the heat transfer coefficient has been evaluated. These first preliminary data shows that an enhancement of the theoretically expected heat transfer coefficient have been measured for each diameter except for the diameter 42 mm, where a drastic deterioration of the heat transfer has been observed. A dependence of the CHF on the immersion depth has been observed for little diameters.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/129181
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