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Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV

ISBN Imprimir: 1-56700-132-7

EFFECTS OF PARALLEL ELECTRODES ON ELECTRO-HYDRO-DYNAMICALLY (EHD) ENHANCED BOILING HEAT TRANSFER

Resumo

Prediction and modelling of Electro-Hydro-Dynamic (EHD) effects in boiling is the key to improving the determination of enhanced convection heat transfer in heat exchangers. The experimental investigation presents the qualitative, and the quantitative analysis. Theoretical models were developed and validated by the experimental data from the EHD effects with parallel electrodes, on the enhancement of pool boiling heat transfer of R11 in both free convection, and nucleate regions. The qualitative analysis showed that EHD effects could locally reduce the heat transfer rates through holding bubbles and hence blanket partially the heating surfaces. The quantitative analysis indicated that the EHD effects varied with the electrode-voltages, electrode orientation, and the boiling regions. Application of EHD increased the maximum heat transfer capacity of the boiling surface.
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