Pin fin heat sink with integrated phase change material and method
A pin fin heat sink includes a plurality of pin fins extending from a base plate, at least one of the plurality of pin fins defining a hollow portion therein. The pin fin heat sink also includes an annular ring of metal foam material disposed within the hollow portion, the annular ring of metal foam material having a radially outer surface in direct contact with an inner diameter of the pin fin, the annular ring of metal foam material defining a central cavity. The pin fin heat sink further includes a phase change material disposed within the central cavity.
1. A pin fin heat sink comprising:
a plurality of pin fins extending from a base plate, at least one of the plurality of pin fins defining a hollow portion therein;
an annular ring of metal foam material disposed within the hollow portion, the annular ring of metal foam material having a radially outer surface in direct contact with an inner diameter of the pin fin, the annular ring of metal foam material defining a central cavity; and
a phase change material disposed within the central cavity, wherein the phase change material comprises paraffin wax.
2. The pin fin heat sink of claim 1 , wherein at least one of the pin fins is formed of a diameter that is different than at least one of the remaining pin fins.
3. The pin fin heat sink of claim 1 , wherein all of the pin fins have different diameters relative to each other.
4. The pin fin heat sink of claim 1 , wherein the pin fins are brazed to the base plate.
5. The pin fin heat sink of claim 1 , wherein the pin fins are additively manufactured to be connected, and extend from, the base plate.
6. The pin fin heat sink of claim 1 , wherein the central cavity is positioned to extend along a central axis of the pin.
7. The pin fin heat sink of claim 1 , wherein the central cavity is positioned to extend along a central axis of the hollow portion.
8. A pin fin heat sink comprising:
a plurality of pin fins extending from a base plate, at least one of the plurality of pin fins defining a hollow portion therein; and
an annular ring of metal foam material disposed within the hollow portion, the annular ring of metal foam material impregnated with a phase change material and defining a central cavity, the central cavity at least partially filled with phase change material, wherein the phase change material comprises paraffin wax.
9. The pin fin heat sink of claim 8 , wherein at least one of the pin fins is formed of a diameter that is different than at least one of the remaining pin fins.
10. The pin fin heat sink of claim 8 , wherein all of the pin fins have different diameters relative to each other.
11. The pin fin heat sink of claim 8 , wherein the pin fins are brazed to the base plate.
12. The pin fin heat sink of claim 8 , wherein the pin fins are additively manufactured to be connected, and extend from, the base plate.
13. The pin fin heat sink of claim 8 , wherein the central cavity is positioned to extend along a central axis of the pin.
14. The pin fin heat sink of claim 8 , wherein the central cavity is positioned to extend along a central axis of the hollow portion.