Two-phase heat exchanger mounting
A two-phase heat exchanger includes a hot side heat sink, a cold side heat sink, and one or more thermoelectric modules disposed between the hot side heat sink and the cold sink heat sink such that hot sides of the one or more thermoelectric modules are thermally coupled to the hot side heat sink and cold sides of the one or more thermoelectric modules are thermally coupled to the cold side heat sink. The two-phase heat exchanger is configured to be mounted at an angle from vertical.
1. A thermoelectric system, comprising:
a vertical wall; and
a two-phase heat exchanger mounted on the vertical wall at an angle from vertical; wherein the two-phase heat exchanger comprises:
a hot side heat sink;
a cold side heat sink;
one or more thermoelectric modules disposed between the hot side heat sink and the cold side heat sink such that a hot side of the one or more thermoelectric modules is thermally coupled to the hot side heat sink and a cold side of the one or more thermoelectric modules is thermally coupled to the cold side heat sink;
wherein:
at least one of the hot side heat sink and the cold side heat sink comprises a chamber and a working fluid within the chamber, the chamber comprises a first wall that is adjacent to the one or more thermoelectric modules, a second wall that is adjacent to the first wall, and a port; the working fluid flows into and out of the chamber through the port, and
the angle being selected such that:
the working fluid flowing into the chamber directly impinges upon a region of the first wall of the chamber that is adjacent to the one or more thermoelectric modules, and
a flow path for the working fluid flowing into the chamber through the port is separate from a flow path for the working fluid flowing out of the chamber through the port.
2. The thermoelectric system of claim 1 wherein the angle from vertical is in a range of and including 2 and 88 degrees from vertical.
3. The thermoelectric system of claim 1 wherein the angle from vertical is in a range of and including 6 and 84 degrees from vertical.
4. The thermoelectric system of claim 1 wherein the angle from vertical is in a range of and including 12 and 78 degrees from vertical.
5. The thermoelectric system of claim 1 wherein:
the cold side heat sink comprises the chamber and the working fluid within the chamber of the cold side heat sink; and
the angle from vertical further selected is such that evaporated working fluid flowing into the chamber of the cold side heat sink directly impinges upon a region of a wall of the chamber of the cold side heat sink that is adjacent to the cold sides of the one or more thermoelectric modules for a given working fluid and expected operating conditions.
6. The thermoelectric system of claim 5 wherein the angle from vertical is further selected such that the evaporated working fluid flowing into the chamber of the cold side heat sink directly impinges upon an entirety of a maximum heat flux region of the wall of the chamber of the cold side heat sink that is adjacent to the cold side of the one or more thermoelectric modules for the given working fluid and the expected operating conditions.
7. The thermoelectric system of claim 5 wherein the cold side heat sink further comprises:
the port to the chamber of the cold side heat sink; and
an inlet pipe coupled to the port of the cold side heat sink;
wherein the port and the inlet pipe of the cold side heat sink are configured such that due to the angle from vertical of the two-phase heat exchanger, when the one or more thermoelectric modules are active, a flow path for the evaporated working fluid into the chamber from the inlet pipe and through the port is separate from a flow path for condensed working fluid out of the chamber to the inlet pipe through the port for the given working fluid and the expected operating conditions.
8. The thermoelectric system of claim 1 wherein the two-phase heat exchanger is encapsulated by a waterproof matrix.
9. The thermoelectric system of claim 8 wherein a pocket is formed within the waterproof matrix around the one or more thermoelectric modules.
10. The thermoelectric system of claim 9 wherein the pocket is filled with one of a group consisting of: air, a low conductivity gas, and evacuated space.
11. The thermoelectric system of claim 1 wherein:
the hot side heat sink comprises the chamber and the working fluid within the chamber of the hot side heat sink; and
the angle is further selected such that a level of a liquid portion of the working fluid within the hot side heat sink is at least at a top of a maximum heat flux region of the wall of the chamber that is adjacent to the hot side of the one or more thermoelectric modules.
12. The thermoelectric system of claim 11 wherein an amount of the working fluid in the chamber of the hot side heat sink is such that the level of the liquid portion of the working fluid would not be at or above the top of the maximum heat flux region if the two-phase heat exchanger were mounted vertically.
13. The thermoelectric system of claim 12 wherein the hot side heat sink further comprises:
the port to the chamber of the hot side heat sink; and
an inlet pipe coupled to the port of the hot side heat sink;
wherein the port and the inlet pipe of the hot side heat sink are configured such that due to the angle from vertical of the two-phase heat exchanger, when the one or more thermoelectric modules are active, a flow path for evaporated working fluid out of the chamber through the port and into the inlet pipe is separate from a flow path for condensed working fluid into the chamber from the inlet pipe through the port.
14. The thermoelectric system of claim 13 wherein:
the cold side heat sink comprises a chamber with a cold side port and a working fluid within the chamber of the cold side heat sink; and
the angle is further selected such that evaporated working fluid flowing into the chamber of the cold side heat sink directly impinges upon a maximum heat flux region of a wall of the chamber of the cold side heat sink that is adjacent to the cold side of the one or more thermoelectric modules for a given working fluid and expected operating conditions.
15. The thermoelectric system of claim 14 wherein the angle from vertical is further selected such that the evaporated working fluid flowing into the chamber of the cold side heat sink directly impinges upon an entirety of the maximum heat flux region of the wall of the chamber of the cold side heat sink that is adjacent to the cold sides of the one or more thermoelectric modules for the given working fluid and the expected operating conditions.
16. The thermoelectric system of claim 14 wherein the cold side heat sink further comprises:
an inlet pipe coupled to the port of the cold side heat sink;
wherein the port and the inlet pipe of the cold side heat sink are configured such that due to the angle from vertical of the two-phase heat exchanger, when the one or more thermoelectric modules are active, the flow path for evaporated working fluid into the chamber from the inlet pipe and through the port is separate from the flow path for condensed working fluid out of the chamber to the inlet pipe through the port for the given working fluid and the expected operating conditions.