Heat recuperator and method for use with gas-fired furnace using nozzle or pre-mix burners
A heat recuperator and a method for recuperating heat from a furnace having a nozzle-mix burner to enhance the efficiency of combustion of one or more burners associated with the furnace. The recuperator comprises an exhaust tube which is connectable to a furnace combustion chamber for receiving heated exhaust gas therethrough. The exhaust tube has an outer cylindrical wall and an inner metallic tube concentrically supported therein. An annular space is defined between the outer cylindrical wall and the inner tube. The inner tube is formed, in at least a major length thereof, with a plurality of corrugations. An air inlet connection is provided at an inlet end of the annular space downstream of the exhaust tube. The annular space also has an outlet upstream of the exhaust tube adjacent an inlet end thereof and connectable to a burner supplying same with heated combustion air. A blower is connectable to the inlet to direct the flow of ambient air in the annular space from the inlet to the outlet of the annular chamber. The corrugated wall induces turbulence to the ambient air and also provides a large heated surface area to enhance heat exchange between the heated exhaust gas and the ambient air.
- Assignee:
- Sivaco Quebec (Canada)
- Patent Number(s):
- US 4560349
- OSTI ID:
- 5745866
- Resource Relation:
- Patent File Date: Filed date 14 Sep 1984; Other Information: PAT-APPL-650494
- Country of Publication:
- United States
- Language:
- English
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AIR HEATERS
DESIGN
EXHAUST RECIRCULATION SYSTEMS
WASTE HEAT UTILIZATION
FURNACES
ENERGY EFFICIENCY
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
BLOWERS
BURNERS
COMBUSTION CHAMBERS
EXHAUST GASES
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TURBULENCE
EFFICIENCY
ENERGY RECOVERY
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EXHAUST SYSTEMS
FLUIDS
GASEOUS WASTES
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320304* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization