Efficient fuel burning stove or furnace with thermal energy slow propagation flue structure

Patent · Tue Sep 29 04:00:00 EDT 1981

OSTI ID:5896304

Herne, R H

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
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
APPLIANCES
BAFFLES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DRAFT CONTROL SYSTEMS
EFFICIENCY
ENERGY RECOVERY
EQUIPMENT
FLOW REGULATORS
FLUE GAS
FURNACES
GASEOUS WASTES
HEAT EXCHANGERS
HEAT RECOVERY
MATERIALS
OPENINGS
ORIFICES
OXIDATION
RECOVERY
STOVES
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES
TUBES
WASTES
WOOD
WOOD BURNING APPLIANCES