Efficient fuel burning stove or furnace with thermal energy slow propagation flue structure
A stove or furnace for combusting and extracting heat from wood and wood-type fuels includes a firebox arrangement for primary combustion and a flue structure coupled to the firebox which includes a plurality of flue gas decelerating chambers for slowing propagation of flue gas, heat exchange to the environment , and further combustion of fuel constituents in the flue gas. The chambers are coupled in series through restricting and accelerating passageways for maintaining draft between chambers, finally leading to an outlet chimney. The chambers are formed with baffles for greater turbulant mixing, combustion, and heat exchange. Furthermore, a tubular conduit may be provided extending from the firebox through the flue structure chambers. The tubular conduit is formed with orifices for injecting burning flue gas from the firebox primary combustion directly into the series coupled chambers to enhance secondary burning. A new method for combustion of wood and carbonaceous fuels and extracting heat is also described.
- Assignee:
- IFI; EDB-82-047751
- Patent Number(s):
- US 4291669
- OSTI ID:
- 5896304
- Resource Relation:
- Patent File Date: Filed date 25 Jun 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
FURNACES
DRAFT CONTROL SYSTEMS
STOVES
WOOD BURNING APPLIANCES
BAFFLES
CARBONACEOUS MATERIALS
COMBUSTION
COMBUSTION CHAMBERS
FLUE GAS
HEAT EXCHANGERS
HEAT RECOVERY
ORIFICES
THERMAL EFFICIENCY
TUBES
WOOD
APPLIANCES
CHEMICAL REACTIONS
CONTROL EQUIPMENT
EFFICIENCY
ENERGY RECOVERY
EQUIPMENT
FLOW REGULATORS
GASEOUS WASTES
MATERIALS
OPENINGS
OXIDATION
RECOVERY
THERMOCHEMICAL PROCESSES
WASTES
320100* - Energy Conservation
Consumption
& Utilization- Buildings
421000 - Engineering- Combustion Systems