Systems and methods for reducing current and increasing voltage in thermoelectric systems
View Patent ↗A thermoelectric assembly and method are provided. The thermoelectric assembly can extend at least partially around a perimeter of a first fluid conduit. The thermoelectric assembly can include a plurality of thermoelectric sub-assemblies aligned with one another along the perimeter of the first fluid conduit. Each thermoelectric sub-assembly can include a plurality of thermoelectric elements in parallel electrical communication with one another, and at least one shunt a plurality of electrically insulating elements to prevent current flow in a plane perpendicular to the first direction between adjacent thermoelectric sub-assemblies.
1. A thermoelectric assembly configured to be in thermal communication with a generally tubular first fluid conduit configured to allow a first fluid to flow through the first fluid conduit along a first direction, the thermoelectric assembly extending at least partially around a perimeter of the first fluid conduit, the thermoelectric assembly comprising:
a plurality of thermoelectric elements;
at least one shunt comprising a first portion and a second portion, the first portion in thermal communication with and mechanically coupled to the plurality of thermoelectric elements, the second portion in thermal communication with and mechanically coupled to the first portion and having a curved surface configured to be in thermal communication with the first fluid conduit;
at least one electrically insulating element configured to electrically isolate the plurality of thermoelectric elements from the at least one shunt;
at least one hole or recess in the first portion of the at least one shunt; and
at least one insert at least partially within the at least one hole or recess and in thermal communication and in electrical communication with the plurality of thermoelectric elements,
wherein the at least one electrically insulating element comprises at least one electrically insulating layer between the at least one insert and the first portion of the at least one shunt.
2. The thermoelectric assembly of claim 1 , wherein the at least one electrically insulating layer comprises at least one of the group consisting of: a dielectric coating on an inner surface of the at least one hole or recess, a dielectric coating on the at least one insert, a dielectric ring, paste, adhesive, tape, and a flexible membrane.
3. The thermoelectric assembly of claim 1 , wherein the at least one electrically insulating layer comprises one or more materials selected from the group consisting of: aluminum oxide, diamond, nitrides, cuprites, ceria, zirconia, or aluminates.
4. The thermoelectric assembly of claim 1 , wherein the plurality of thermoelectric elements comprises at least one first thermoelectric element having a first doping type and at least one second thermoelectric element having a second doping type different from the first doping type, wherein the at least one insert is in electrical communication with the at least one first thermoelectric element and the at least one second thermoelectric element, and is between the at least one first thermoelectric element and the at least one second thermoelectric element.
5. The thermoelectric assembly of claim 4 , wherein the at least one insert is in thermal communication with the at least one shunt and with the at least one first thermoelectric element and the at least one second thermoelectric element.
6. The thermoelectric assembly of claim 5 , wherein the at least one insert comprises at least one plate configured to fit within the at least one hole or recess.
7. The thermoelectric assembly of claim 4 , wherein the at least one insert has a coefficient of thermal expansion higher than a coefficient of thermal expansion of the at least one hunt.
8. The thermoelectric assembly of claim 4 , wherein the at least one insert has a coefficient of thermal expansion lower than a coefficient of thermal expansion of the at least one shunt.
9. The thermoelectric assembly of claim 4 , wherein the at least one insert has a coefficient of thermal conductivity higher than a coefficient of thermal conductivity of the at least one shunt.