Abstract
Experimental investigations are carried out to study the effect of a non uniform electric field on the boiling heat transfer. The study has found that the heat transfer coefficient increases as the electric field strength increases. Enhanced coefficient decreases with heat flux increases and finally reaches a steady value. When the heat flux is small, high voltage has a better enhancement effect. The Onset of Nucleate Boiling (ONB) undergoes a larger increase by applying a high voltage.
Highlights
EHD (Electro Hydrodynamic) enhancement of boiling heat transfer is defined in the fluid in an electric field is applied, the use of electric field, flow field and temperature field of the coupling between the three to achieve the purpose of enhanced boiling heat transfer
In order to further understanding the mechanism of EHD enhancement of boiling heat transfer, this study adopts a linear electrode, studied EHD enhancement of boiling heat transfer effect in the non uniform electric field, hoping to make a little contribution to mechanism research
The electric field on R123 medium influence as well as its low boiling point, so R123 is selected as the working fluid
Summary
EHD (Electro Hydrodynamic) enhancement of boiling heat transfer is defined in the fluid in an electric field is applied, the use of electric field, flow field and temperature field of the coupling between the three to achieve the purpose of enhanced boiling heat transfer. The condensation heat transfer is enhanced in the electric field (Butrymowicz et al, 2002). Some of this has been directed at practical applications. Under the action of the electric field, the boiling heat transfer is complicated (Pascual et al, 2001). The mechanism of enhancement of boiling heat transfer in the electric field has not been explained (Wang et al, 2009). In order to further understanding the mechanism of EHD enhancement of boiling heat transfer, this study adopts a linear electrode, studied EHD enhancement of boiling heat transfer effect in the non uniform electric field, hoping to make a little contribution to mechanism research
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