Exhaust gas heat exchanger
US8651170B2 · kind B2 · utility
9Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2009 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Feb 20, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2001/027
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Heat is exchanged between exhaust gas passing through a plurality of tubes and cooling water passing through a plurality of passages defined outside of the plurality of tubes layered with each other. A heat exchanger includes a temperature decreasing portion arranged in a predetermined area on an outer surface of the tube adjacent to an inlet side of exhaust gas. The temperature decreasing portion is configured to decrease a temperature of a thermal boundary layer of the outer surface of the tube relative to cooling water by increasing a heat transmitting ratio between the outer surface of the tube and cooling water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.