Innovative radial heat transport device driven by EHD conduction

  This study expands upon the understanding gained by the previous studies and utilizes this understanding to produce an innovative, compact, radial heat pipe driven by EHD conduction pumping. A single disk is situated with a high heat flux source at the center. Heat is dissipated through condensation at the periphery of the disk to chilled water. Electrodes are lithographically fabricated on the surface of the disk, forming a number of concentric circles and covering the condenser, adiabatic, and boiler sections. This novel design features a number of intrinsic advantages. The design is very compact, particularly if the size of the adiabatic section is minimized. The size of the condenser is naturally much larger than the size of the boiler. Since condensation heat transfer coefficients are always lower than evaporation heat transfer coefficients, this large size ratio satisfies a key heat transfer requirement. Also, the heated section is wetted equally from all sides. Therefore, fluid must only travel one half of the distance it would otherwise have to travel if the heated section was wetted from only one side (as in traditional heat pipes and in the EHD-driven heat transport device described in other experiments).