Apparatus for extracting exhaust heat from waste heat sources while preventing backflow and corrosion
US7043912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Dec 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In a waste heat recovery system wherein a heat exchanger derives heat from an engine exhaust, a venturi is fluidly connected to an engine exhaust port so as to thereby increase the flow rate and reduce the pressure in a manifold which is fluidly connected between the venturis and the heat exchanger. A fan is provided downstream of the heat exchanger to draw hot gases from the manifold, through the heat exchanger and discharge it to ambient. But when the fan is not operating during periods in which the engine is operating, the lower pressure manifold will draw ambient air in through the fan and through the heat exchanger, with the ambient air then being entrained in the exhaust gases being discharged from an exhaust channel downstream of the venturi. In one embodiment, a plurality of heat sources are provided with each having its own venturi connected to the common low pressure manifold. One or more of the plurality of waste heat source may be nonoperative or operating at a lower speed, but because of the low pressure manifold, the hot gases from the operative/higher speed waste heat source will not flow to the nonoperative or slower running waste heat source. Check valves are provi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.