Dendritic Tube Circular Fin Heat Exchanger
Various exemplary embodiments relate to a heat exchanger configured to be attached to a cooling fan having a fan hub and a plurality of fan blades the cooling fan configured to produce airflow, said airflow having a first airflow rate at a first location and a different second airflow rate at a different second location, the heat exchanger including: an inlet manifold; an outlet manifold; a plurality of inlet tubes connected to the inlet manifold; a plurality of outlet tubes connected to the outlet manifold and the plurality of inlet tubes; and a plurality of concentric circular fins connected to the plurality of tubes, wherein the plurality of concentric circular fins have different radii such that a first spacing between a pair of adjacent first and second concentric circular fins corresponds to the first location and a second spacing between a pair of adjacent third and a fourth concentric circular fins corresponds to the second location and the first spacing is different from the second spacing.
1 . A heat exchanger configured to be attached to a cooling fan having a fan hub and a plurality of fan blades the cooling fan configured to produce airflow, said airflow having a first airflow rate at a first location and a different second airflow rate at a different second location, the heat exchanger comprising:
an inlet manifold;
an outlet manifold;
a plurality of inlet tubes connected to the inlet manifold;
a plurality of outlet tubes connected to the outlet manifold and the plurality of inlet tubes; and
a plurality of concentric circular fins connected to the plurality of tubes, wherein the plurality of concentric circular fins have different radii such that a first spacing between a pair of adjacent first and second concentric circular fins corresponds to the first location and a second spacing between a pair of adjacent third and a fourth concentric circular fins corresponds to the second location and the first spacing is different from the second spacing.
2 . The heat exchanger of claim 1 , wherein the spacing between the concentric circular fins is inversely proportional to a magnitude of the velocity profile of the cooling air over the concentric circular fins at that distance from the fan hub center.
3 . The heat exchanger of claim 1 , wherein the plurality of inlet tubes and the plurality of outlet tubes branch at least once prior to connecting to each other.
4 . The heat exchanger of claim 2 , wherein the cross-sectional area of the plurality of inlet tubes and the plurality of outlet tubes is reduced after branching.
5 . The heat exchanger of claim 2 , wherein location of the branching occurs more frequently as the spacing between the concentric circular fins decreases.
6 . The heat exchanger of claim 1 , wherein each of the concentric circular fins has the same thickness.
7 . The heat exchanger of claim 2 , wherein there are no concentric circular fins placed in locations where the velocity profile has a magnitude of zero.
8 . The heat exchanger of claim 1 , wherein the heat exchanger is made of aluminum or copper.
9 . A cooling assembly comprising:
a fan comprising:
a fan hub; and
a plurality of fan blades the cooling fan configured to produce airflow, said airflow having a first airflow rate at a first location and a different second airflow rate at a different second location; and
a heat exchanger comprising:
an inlet manifold;
an outlet manifold;
a plurality of inlet tubes connected to the inlet manifold;
a plurality of outlet tubes connected to the outlet manifold and the plurality of inlet tubes; and
a plurality of concentric circular fins connected to the plurality of tubes, wherein the plurality of concentric circular fins have different radii such that a first spacing between a pair of adjacent first and second concentric circular fins corresponds to the first location and a second spacing between a pair of adjacent third and a fourth concentric circular fins corresponds to the second location and the first spacing is different from the second spacing.
10 . The cooling assembly of claim 8 , wherein the plurality of inlet tubes and the plurality of outlet tubes branch at least once prior to connecting to each other.
11 . The cooling assembly of claim 9 , wherein the cross-sectional area of the plurality of inlet tubes and the plurality of outlet tubes is reduced after branching.
12 . The cooling assembly of claim 9 , wherein location of the branching occurs more frequently as the spacing between the concentric circular fins decreases.
13 . The cooling assembly of claim 8 , wherein each of the concentric circular fins has the same thickness.
14 . The cooling assembly of claim 8 , wherein said airflow has a third airflow rate at a third location and the third airflow rate is substantially zero and wherein no concentric circular fins are placed in the third location.
15 . The cooling assembly of claim 8 , wherein the heat exchanger is made of aluminum or copper.
16 . A method of manufacturing a heat exchanger configured to be attached to a cooling fan having a fan hub and a plurality of fan blades the cooling fan configured to produce airflow, said airflow having a first airflow rate at a first location and a different second airflow rate at a different second location, the method comprising:
placing a plurality of concentric circular fins connected to the plurality of tubes, wherein the plurality of concentric circular fins have different radii such that a first spacing between a pair of adjacent first and second concentric circular fins corresponds to the first location and a second spacing between a pair of adjacent third and a fourth concentric circular fins corresponds to the second location and the first spacing is different from the second spacing.
17 . The method of claim 16 , further comprising:
determining branching distances for the plurality of inlet tubes and outlet tubes based on the spacing of the concentric circular cooling fins.
18 . The method of claim 17 , further comprising:
determining the cross-sectional area of the plurality of inlet tubes and outlet tubes based on the spacing of the concentric circular cooling fins and the branching locations.
19 . The method of claim 17 , wherein the plurality of inlet tubes and the plurality of outlet tubes are evenly spaced and the branching distance is the same for every inlet tube and outlet tube.
20 . The method of claim 16 , further comprising:
removing any concentric circular fins placed in locations where the flow rate has a magnitude of zero.