Finger air baffle for high efficiency furnace
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-efficiency furnaces face premature cracking issues due to high operating temperatures, leading to costly material usage and reduced operational life, as conventional designs struggle to manage heat distribution effectively at hot spots within heat exchanger panels.
Innovation Solution
A vertically oriented finger baffle is integrated into the furnace, guiding airflow to hot spots using the coanda effect, thereby reducing temperature stress and preventing premature cracking, while allowing the use of lower-cost materials without compromising airflow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high operating temperatures are used to achieve high efficiency heating, then heating efficiency is improved, but heat exchanger panels crack prematurely
Solution Approach 1:
A finger baffle is introduced as an intermediary component between the heat source and the heat exchanger panels. The baffle redirects airflow to specific locations, creating a more uniform temperature distribution and preventing excessive heat concentration at critical points on the heat exchanger panels, thereby reducing thermal stress and cracking while maintaining overall heating efficiency
2Ease of manufacture
If conventional heat distribution designs are used, then manufacturing is simpler, but hot spot temperatures cause premature cracking
Solution Approach 1:
The finger baffle is designed with multiple segmented fingers that divide and redirect airflow to different areas of the heat exchanger. This segmentation allows precise control of airflow distribution to specific hot spots without requiring complex manufacturing processes for the heat exchanger panels themselves, maintaining manufacturing simplicity while effectively managing temperature distribution
3Reliability
If expensive materials are used to prevent cracking, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
Instead of using expensive materials for the heat exchanger panels, the invention employs a relatively simple and inexpensive finger baffle component that manages thermal distribution. This approach prioritizes cost-effective manufacturing while achieving the reliability goal through intelligent airflow management rather than material substitution
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 finger baffle effectively reduces hot spot temperatures, extends the operational life of heat exchanger panels, and maintains airflow performance, enabling the use of less expensive materials while enhancing furnace efficiency by directing airflow more effectively to hot areas.
Implementation Method 1
guiding airflow to hot spots using the coanda effect
Data Source
AI summary
One aspect of this disclosure provides a finger baffle for a heating furnace. This embodiment includes an elongated support plate having a length, and at least one finger baffle extending outwardly and in a vertically oriented direction from the elongated support plate. The at least one finger baffle has a width that extends along the length of the elongated support plate. The finger baffle may be employed in a high-efficiency gas furnace.