Heater, apparatus, and associated method
View Patent ↗A heater that may include an outer housing and an inner tube is provided. The inner tube is in a coaxial relation to and within the outer housing. An inward facing surface of the inner tube defines a volume sufficient to receive a reaction capsule, and the outward facing surface is radially spaced from an inward facing surface of the outer housing sufficient to define a gap. A filler material is disposed within the gap. The filler material responds to pressure such that the filler volume is reduced by less than 5 volume percent at greater than 500 MPa pressure and at greater than 500° C. temperature. One or more heating elements are disposed in the gap. The heating elements are in thermal communication with the inner tube.
1. A heater for use in a high pressure high temperature apparatus, the heater comprising:
a first tube defining an axis, the tube has a first end and a second end, and the second end is spaced axially from the first end, the tube having an outer surface and an inner surface, the inner surface capable of receiving a capsule;
a filler material disposed about or proximate to the outer surface of the tube;
one or more heating elements in thermal communication with the tube and disposed at least partially within the filler material;
wherein in response to an operating pressure that is greater than 150 MPa and a temperature that is greater than 200° C., the filler material volume decreases less than 5 volume percent.
2. The heater of claim 1 , wherein
in response to an operating pressure that is greater than 500 MPa and a temperature that is greater than 500° C., the filler material volume decreases less than 5 volume percent.
3. The heater of claim 1 , wherein the first end and the second end of the first tube define an internal volume, and wherein
in response to an operating pressure that is greater than 150 MPa and a temperature that is greater than 200° C., the filler material volume decreases less than 5 volume percent and the internal volume changes less than 10 vol. %.
4. The heater of claim 1 , wherein the first end and the second end of the first tube define an internal volume, and wherein
in response to an operating pressure that is greater than 500 MPa and a temperature that is greater than 500° C., the filler material volume decreases less than 5 volume percent and the internal volume changes less than 10 vol. %.
5. The heater of claim 3 , further comprising a second tube or a housing and wherein the filler material is disposed between the first tube and the second tube or the housing.
6. The heater of claim 5 , wherein the second tube has a first end and a second end, and the second end is spaced axially from the first end, and the first end and the second end of the second tube define an internal volume, and wherein
in response to an operating pressure that is greater than 150 MPa and a temperature that is greater than 200° C., the filler material volume decreases less than 5 volume percent and the internal volume changes less than 10 vol. %.
7. The heater of claim 5 , wherein the tube is in a coaxial relation to the second tube or the housing, and the first tube having an inward facing surface and an outward facing surface, the inward facing surface being radially spaced from the axis to define a volume sufficient to receive a reaction capsule, and the outward facing surface being radially spaced from an inward facing surface of the second tube sufficient to define a gap; and
the filler material is disposed within the gap.
8. The heater of claim 5 , wherein the filler material is operable to transfer an internal pressure of the first tube radially outward and to the second tube or the housing during operation.
9. The heater of claim 1 , wherein the inner surface of the first tube has a root-mean-square surface roughness less than 1 millimeter, and does not have one or more gaps, cracks, or discontinuities with a dimension that is larger than 5 millimeters.
10. The heater of claim 1 , wherein the filler material comprises a castable or moldable cement.
11. The heater of claim 1 , wherein the filler material comprises magnesium oxide, alumina, or both magnesium oxide and alumina, in an amount in a range of from 70 weight percent to 80 weight percent.
12. The heater of claim 1 , wherein the filler material has an electrical resistance greater than one hundred kiloOhm (kω).
13. The heater of claim 1 , wherein the filler material has a volume reduction of less than 10 percent at a pressure of greater than 700 MPa, and at a temperature of greater than 700 degrees Celsius.
14. The heater of claim 1 , wherein the filler material has a density of at least 75 percent of the theoretical maximum density.
15. The heater of claim 1 , wherein the first tube outer surface defines a channel or groove, and at least one of the one or more heating elements are contained within assemblies that are disposed at least partially within the channel or groove.
16. The heater of claim 15 , wherein the groove defines at least a portion of a circular cross section.
17. The heater of claim 1 , wherein the heating element is one of a foil, a ribbon or wire, and defining a spiral, a serpentine, a single helix, a double helix, or a multiple helix pattern.
18. The heater of claim 5 , wherein the heating element is electrically insulated from the first tube, from the second tube, or from both the first tube and the second tube by an electrical insulation layer.
19. The heater of claim 18 , wherein the electrical insulation layer comprises an electrically insulative ceramic coating.
20. The heater of claim 18 , wherein the electrical insulation layer is multi-layer, and the multi-layer coating has differing compositions from sub-layer to sub-layer to define a gradient of compositions across a thickness of the electrical insulation layer.
21. The heater of claim 18 , wherein the electrical insulation layer comprises one or more of yttria-stabilized zirconia (YSZ), a mixture of alumina and YSZ, or alumina.
22. The heater of claim 5 , further comprising one or more electrically insulating materials disposed in the filler material, the electrically insulating materials being capable of insulating at least one of the heating elements from first tube, from the second tube, from both the first tube and the second tube, or from other of the heating elements.
23. The heater of claim 5 , further comprising a first end ring secured to the first end of first tube, to the first end of the second tube, or to the first end of both the first tube and of the second tube.
24. The heater of claim 22 , wherein at least one end ring defines an aperture or a groove configured to allow a heating element to communicate therethrough, and further comprising one or more electrical leads in electrical communication with the heating element and with an external power source.
25. The heater of claim 1 , wherein the heating element is one of a plurality of heating elements disposed in the filler material, each of the heating elements communicating with a controller that is operable to control power to the plurality of heating elements sufficient to achieve temperature in a zone in a reaction capsule.
26. The heater of claim 25 , wherein the reaction capsule is capable of receiving and retaining a medium that responds to heat and pressure by becoming supercritical, and wherein an interior volume of the first tube, in which the reaction capsule is disposed during operation, is configured to define a constant volume to allow pressure in the reaction capsule to build in response to the temperature such that the temperature and pressure in the reaction capsule, during operation, are sufficiently high so that the medium is supercritical and the necessary pressure for supercriticality is supplied by the restraint on volume provided by the inner surface of the first tube passively restraining an outer surface of the reaction capsule.
27. A heater apparatus for use in a high-pressure high temperature apparatus, comprising:
a first tube having an inner surface and an outer surface, the inner surface defines a chamber configured to receive a capsule, and the outer surface defines at least a groove or a channel;
a filler material disposed within the groove or channel, at least a heating element disposed within the filler material, the heating element is in thermal communication with the first tube and electrically insulated from the first tube by the filler material;
wherein in response to an operating pressure that is greater than 150 MPa and a temperature that is greater than 200° C., the filler material volume decreases less than 5 volume percent.
28. The heater apparatus of claim 27 , further comprising an electrically non-conductive ceramic coating contacting an outer surface of the heating element and the inner surface of the groove or channel.
29. The heater apparatus of claim 27 , farther comprising at least a second tube disposed within the groove or channel, and wherein the filler material is disposed within the second tube, the heating element disposed within the second tube and electrically insulated from the second tube by the filler material.
30. The heater apparatus of claim 27 , wherein the filler material comprises magnesium oxide, alumina, or both magnesium oxide and alumina, and wherein the filler material has an electrical resistance greater than 100 kiloOhm.
31. The heater apparatus of claim 27 , further comprising an electrically conductive or an electrically insulative cement disposed within the groove or channel and outside the second tube, separating the second tube from the groove or channel.
32. An apparatus, comprising:
a heating element operable to heat to a temperature in a range of greater than 500° C.;
a cement matrix encasing the heating element, the cement matrix having a first surface and a second opposing surface;
a first tube communicating with the first surface of the cement matrix and providing mechanical support thereto, and a second tube communicating with the second surface of the cement matrix; and
during operation, energy supplied to the heating element causes thermal energy to flow into the first tube to a capsule disposed within a region of the first tube, the thermal energy is sufficient to increase the capsule temperature to be in a range of greater than 500° C., and to generate pressure within the capsule to be in a range of greater than 500 MPa as a response to the increase in temperature while the first tube is restrained by the cement matrix such that a volume within the capsule increases in an amount of less than 5 percent.
33. The system of claim 32 , wherein the capsule removes or separates from the region of the first tube and is not adhered, bonded, or welded therein.