Falling film type heat exchanger tube
US6056048A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 12, 1999 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Mar 12, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28D2021/0071
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat exchanger tube includes ribs formed in protrusion on an internal surface of the tube and extending spirally with a suitable distance between adjacent ribs, concavities formed on the external surface of the tube and extending spirally with a suitable distance between adjacent concavities, and a plurality of independent projections formed on the external surface of the tube and laid out spirally. The projections are formed with a recess on their top surfaces in such a way that a portion aligned with the ribs on the internal surface of the tube is lower than a portion aligned with an area between the ribs. Further, the concavities on the external surface of the tube and the ribs on the internal surface of the tube are formed at mutually aligned positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.