Method of making fin elements for heat exchangers
US4211276A · kind A · utility
9Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1978 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Jun 22, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49378
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In a crossed fin-tube type heat exchanger wherein tubes are attached at right angles to a large number of fin elements arranged in parallel with one other, the surfaces of these fin elements are roughened to have an unevenness satisfying a relation EQU R.apprxeq.1/cos.theta. where R is a ratio of the extended, uneven or roughened surface to the flat or smooth surface of the fin element; and .theta. is a contact angle for a liquid droplet in contact with the flat or smooth surface of the fin element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.