Fully controllable heat pipe containing a short electroosmotic pumping section
Abstract
It is pointed out that an electroosmotic heat pipe (EOHP) is basically a varible conductance heat pipe for which the control properties are realized by the incorporation of a short electroosmotic pumping section. This section, the 'EOplug,' controls the liquid flow in the heat pipe wick system and, therefore, the flow rate supplied to the heat pipe evaporator. The underlying theory and the equations governing EOHP performance follow in straightforward fashion from combining heat pipe theory and electroosmotic considerations. Theoretical considerations result in the definition of two new figures of merit: the electroosmotic figure of merit, which compares electroosmotic transport with capillary transport, and the transport capability reduction factor, which represents the flow reducing resistance caused by the EOplug. Together with the classical heat pipe numbers (liquid transport number, wick number, and wicking height), these figures of merit make it possible to compare EOHP working fluids, plug configurations, and EOHP performance.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1983
 Bibcode:
 1983aiaa.meetU....D
 Keywords:

 Electrical Resistivity;
 Feedback Control;
 Flow Velocity;
 Heat Pipes;
 Osmosis;
 Pumping;
 Aerospace Environments;
 Earth Environment;
 Parameter Identification;
 Performance Prediction;
 Working Fluids;
 Fluid Mechanics and Heat Transfer