Efficient Fireplace Combustion with Nested Pipe Design
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Summary
Problems
Open-hearth fireplaces experience incomplete combustion due to insufficient temperatures, leading to toxic emissions, while closed-hearth fireplaces achieve complete combustion but may still have residual noxious effluents.
Innovation solutions
A device integrated into the fireplace with nested pipes forming ducts to inject secondary air at sufficient temperature for a double combustion process, ensuring complete burning of pollutants by creating a counter-flow exchanger system that heats air to above 573°C.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If open-hearth fireplace is used, then ease of operation is improved, but combustion temperature is insufficient leading to incomplete combustion and toxic emissions
Why choose this principle:
The combustion process is segmented into two distinct stages: primary combustion in the open hearth and secondary combustion in the inserted device. The nested pipe structure divides the gas flow path into multiple channels, allowing separate temperature zones for each combustion stage, thus enabling complete combustion while maintaining operational simplicity
Principle concept:
If open-hearth fireplace is used, then ease of operation is improved, but combustion temperature is insufficient leading to incomplete combustion and toxic emissions
Why choose this principle:
The device employs a nested pipe structure where multiple pipes are arranged concentrically within each other. This nesting allows hot gases to flow through inner pipes while outer pipes provide structural support and additional flow paths, maximizing heat exchange efficiency within a compact volume and enabling complete combustion without increasing device footprint
Application Domain
Data Source
AI summary:
A device integrated into the fireplace with nested pipes forming ducts to inject secondary air at sufficient temperature for a double combustion process, ensuring complete burning of pollutants by creating a counter-flow exchanger system that heats air to above 573°C.
Abstract
The invention relates to a device approximately defining an L shape and comprising at least two first nested pipes in the foot of the L ( 32 ), and at least one second pipe ( 36 ) provided with at least one opening ( 38 ), in the leg of the L, the first pipes being arranged in such a way as to define a duct between one end ( 34 ) of a first central pipe and said at least one opening ( 38 ) by means of passages defined at the ends of the first pipes.