Heat generation and exchange devices incorporating a mixture of conductive and dielectric particles
A device for generating heat from an applied current, the device comprises a mixture of conductive particles and dielectric particles. The device includes at least one pair of electrodes disposed within the mixture to direct an applied current through the mixture to resistively heat the mixture. The device may further heat a liquid that flows through the mixture.
1. A device for heating a liquid from an applied current, comprising:
a) a vessel having an entrance orifice and an exit orifice;
b) a mixture of conductive particles and dielectric particles contained within said vessel, the liquid flows from said entrance orifice through said mixture to said exit orifice;
c) a first filter placed in series with said entrance orifice, a second filter placed in series with said exit orifice, said first and second filters keep conductive particles and dielectric particles from exiting said vessel;
d) at least one pair of electrodes disposed within said mixture to direct the applied current through said mixture; and
e) wherein the applied current resistively heats said mixture transferring heat to the liquid.
2. A device as recited in claim 1 , further comprising a power supply for supplying the applied current.
3. A device as recited in claim 1 , further comprising a temperature sensor and a temperature controller, wherein said temperature controller is connected to provide electrical energy to said at least one pair of electrodes when said temperature is below a temperature set point.
4. A device as recited in claim 1 , further comprising a sleeve inserted within said mixture; wherein said sleeve creates a cavity that is void of said mixture.
5. A device as recited in claim 1 , wherein said pair of electrodes are an inner electrode concentric to an outer electrode, wherein with said mixture is disposed between said inner and outer electrodes.
6. A device as recited in claim 1 , wherein said conductive particles are graphite.
7. A device as recited in claim 1 , wherein said conductive particles have a diameter from 1 to 1500 microns.
8. A device as recited in claim 1 , wherein said dielectric particles have a diameter from 1 to 1500 microns.
9. A device as recited in claim 1 , wherein said mixture has a resistivity from 0.015 ohm-meters to 2.3 megaohm-meters.
10. A device as recited in claim 1 , wherein said dielectric particles are at least one from the group consisting of silicon dioxide, hydrated magnesium silicate, silicon carbide, and soda-lime glass beads.
11. A device as recited in claim 1 , wherein said mixture is characterized as pourable.
12. A device as recited in claim 6 , wherein said mixture is from 4-percent to 15-percent by weight of graphite.
13. A device as recited in claim 6 , wherein the radius of said graphite particles divided by the radius of said dielectric particles from is 0.2 to 5.
14. A device as recited in claim 1 , wherein the liquid is resistively heated by electric current flowing through the liquid.