Heat transfer surface with a microstructure of projections galvanized onto it
First Claim
1. A heat transfer surface on tubular or plate-like bodies having a microstructure of projections which protrude out of the base surface and are galvanized onto the base surface with a minimum height of 10 μ
- m, characterized in that the base surface (3a) is partially or entirely covered with projections (6);
these projections (6) are applied in the form of ordered microstructures (7) and have a pin shape, extending with their longitudinal axis (6c) either perpendicular to the base surface (3a) or at an angle (α
) between 30° and
90°
, wherein the number of projections per unit of area is selected as a function of the thickness (d) of the pin-shaped projections (6) and is between 100 μ
m and 0.2 μ
m for a number between 102/cm2 and 108/cm2.
4 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to a heat transfer surface (3) or tubular or plate-like bodies (4) having a microstructure (7) projecting out of the base surface (3a) and consisting of projections (6) which are galvanized onto the base surface (3) with a minimum height of 10 μm.
The object of this invention is to create a heat transfer surface (3) of this type which is characterized by an increase in thermal efficiency of its heat transfer surfaces (3) with the smallest possible temperature differences and is suitable for both nucleate boiling and film condensation with a justifiable manufacturing expense.
The object is achieved according to this invention by the fact that the base surface (3a) is covered entirely or partially with projections (6); these projections (6) are applied in the form of ordered microstructures (7) and they have a pin shape, extending with their longitudinal axis (6c) either at a right angle to the base surface (3a) or at an angle (α) between 30° and 90°.
37 Citations
17 Claims
-
1. A heat transfer surface on tubular or plate-like bodies having a microstructure of projections which protrude out of the base surface and are galvanized onto the base surface with a minimum height of 10 μ
- m, characterized in that the base surface (3a) is partially or entirely covered with projections (6);
these projections (6) are applied in the form of ordered microstructures (7) and have a pin shape, extending with their longitudinal axis (6c) either perpendicular to the base surface (3a) or at an angle (α
) between 30° and
90°
, wherein the number of projections per unit of area is selected as a function of the thickness (d) of the pin-shaped projections (6) and is between 100 μ
m and 0.2 μ
m for a number between 102/cm2 and 108/cm2. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- m, characterized in that the base surface (3a) is partially or entirely covered with projections (6);
-
2. A heat transfer surface on tubular or plate-like bodies having a microstructure of projections which protrude out of the base surface and are generated by a galvanic process on the base surface with a minimum height of 10 μ
- m, characterized in that the base surface (3a) is partially or entirely covered with projections (6);
these projections (6) are applied in the form of ordered microstructures (7) and have a pin shape, extending with their longitudinal axis (6c) either perpendicular to the base surface (3a) or at an angle (α
) between 30° and
900°
.
- m, characterized in that the base surface (3a) is partially or entirely covered with projections (6);
Specification