Burner Assembly Air Gap for Quieter Secondary Combustion
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Solution Overview
Problem
Furnace systems face inefficiencies in combustion due to suboptimal thermodynamic properties and noise levels, which affect heat exchange and overall performance.
Innovation Solution
Incorporating a secondary combustion air gap downstream of the venturi plate in the burner assembly, which reduces the velocity of the flow through the venturi plate and introduces additional combustion air, enhancing combustion efficiency and reducing noise by facilitating secondary combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the burner assembly operates with standard combustion air supply, then the combustion process is simple and device complexity is low, but combustion efficiency is insufficient and thermodynamic properties are suboptimal
Solution Approach 1:
The combustion air supply is segmented into primary combustion air (through the venturi plate) and secondary combustion air (through the air gap), allowing staged combustion to improve efficiency without requiring a completely complex system redesign
Solution Approach 2:
The air gap acts as an intermediary channel between the primary and secondary combustion zones, facilitating controlled mixing of combustion air with exhaust gases to enhance thermodynamic properties
2Object-affected harmful factors
If high velocity flow is maintained through the venturi plate, then the combustion process is direct and simple, but noise levels increase and combustion efficiency decreases
Solution Approach 1:
The air gap is positioned downstream of the venturi plate to preliminarily mix secondary air with the high-velocity flow before it enters the heat exchanger, reducing noise and improving combustion before the main heat exchange process
Solution Approach 2:
The high-velocity flow is extracted from the direct path by introducing it into the air gap environment, where it can decelerate and mix with secondary air before continuing to the heat exchanger, thereby reducing noise
3Temperature
If additional combustion air is introduced downstream of the venturi plate, then combustion efficiency improves and thermodynamic properties enhance, but the system complexity increases
Solution Approach 1:
The air gap serves multiple functions simultaneously: it introduces secondary combustion air, mixes exhaust gases with fresh air, reduces noise, and improves thermodynamic properties, thereby enhancing the system without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The secondary combustion air gap improves thermodynamic properties of combustion products, enhances heat exchange, and reduces noise levels, leading to more efficient and quieter operation of the furnace system.
Implementation Method 1
Incorporating a secondary combustion air gap downstream of the venturi plate in the burner assembly, which reduces the velocity of the flow through the venturi plate
Implementation Method 2
burner assembly (e.g., having one or more burners) and a heat exchanger to produce hot air by combusting a mixture of air and fuel
Implementation Method 3
The combustion products may pass through tubes or piping in the heat exchanger, where air passing over the tubes or pipes extracts heat from the combustion products
Data Source
AI summary
A furnace system includes a burner assembly configured to generate combustion products within a primary combustion zone comprising one or more burners. The furnace system includes a panel disposed downstream of the burner assembly along a flow path for the combustion products, where the panel includes at least one panel opening. The furnace system also includes a secondary combustion air gap defined by one or more spacers disposed between the burner assembly and the panel, such that a secondary combustion zone is established between the burner assembly and the panel and/or downstream of the panel. The secondary combustion air gap is downstream from and external the burner assembly.