Indirect Brayton energy recovery system
US4154055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Mar 25, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02C6/006
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An indirect Brayton cycle is employed for an energy recovery system useful for large mass flow applications, such as a cast-iron making cupola. Exhaust gases from the cupola (elevated in temperature due to conversion by burning to CO.sub.2 and due to elimination of cooling of the exhaust passages) are directed to a turbine (which extracts energy to drive a compressor and electrical generator), the exhaust gases are then expanded (reduced in pressure), passed through a heat exchanger to release additional heat units to an air supply feeding the cupola, and then through the compressor to be raised in pressure to ambient for dumping. The exhaust gases are roughly filtered prior to entry into the recovery system and fine filtered after leaving the system prior to dumping; the residual temperature of the fine filtered exhaust gases is about 390.degree. F. In contrast, the direct Brayton cycle employed by the prior art for energy recovery (steam plants) conveys a fresh air supply to a compressor-turbine-generator combination, first raising the pressure and temperature of the air supply by the compressor, then passing the air supply through a heat exchanger for an additional temperature i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.