Sectional Heat Exchanger Layout for Compact Heat Transfer
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Solution Overview
Problem
The performance and efficiency of sectional heat exchangers are not optimal, particularly in terms of energy transfer and assembly ease.
Innovation Solution
A sectional heat exchanger design featuring two end segments and one or more intermediate segments assembled parallel to each other, with a combustion chamber perpendicular to the intermediate segments, and a single burner, includes flue gas and water channels with varying widths and depths to enhance heat transfer and stability, and uses aluminum or aluminum alloy segments with features like pins and fins to increase heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple burners are installed in each combustion chamber for each intermediate segment, then the heat generation capacity is increased, but the device complexity and energy consumption increase
Solution Approach 1:
The patent merges multiple combustion chambers into a single shared combustion chamber that serves all intermediate segments. Instead of having separate burners for each segment, one burner generates flue gas that is distributed to multiple heat exchange zones, reducing the number of burners while maintaining heat generation capacity.
Solution Approach 2:
The single combustion chamber and burner serve multiple functions by providing heat to all intermediate segments simultaneously. The flue gas generated by one burner is distributed through multiple channels to heat exchange surfaces across different segments, making the burner system universal for the entire heat exchanger assembly.
2Loss of energy
If the width and depth of flue gas channels are increased to improve heat transfer, then the heat transfer efficiency is improved, but the device volume and weight increase
Solution Approach 1:
The patent extends the heat exchange path in the longitudinal direction rather than increasing channel cross-sectional dimensions. Flue gas channels are designed to extend through multiple intermediate segments in series, increasing the heat transfer surface area and efficiency without requiring wider or deeper channels that would increase device volume.
Solution Approach 2:
The heat exchanger is divided into multiple intermediate segments with flue gas channels extending through them in sequence. This segmentation allows the flue gas to traverse a longer path through multiple smaller channels rather than requiring one large channel, maintaining compact dimensions while achieving high heat transfer efficiency.
3Weight of stationary object
If aluminum or aluminum alloy segments are used to reduce weight, then the device weight is reduced, but the manufacturing precision and assembly difficulty increase
Solution Approach 1:
The heat exchanger is divided into standardized intermediate segments that can be manufactured with precise dimensions using extrusion or casting processes. Each segment is designed as a modular unit with consistent geometry, facilitating precise assembly. The segmented design allows for pre-manufacturing quality control while maintaining lightweight aluminum construction.
Solution Approach 2:
Specific regions of the aluminum segments are designed with localized features such as connection interfaces, channel geometries, and mounting points that require precise manufacturing. These critical areas are optimized for precision manufacturing while other regions can be lighter, balancing manufacturing precision requirements with weight reduction goals.
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 design results in a more compact, lighter, and energy-efficient heat exchanger with improved heat transfer efficiency and reduced energy consumption, allowing for easier assembly and increased stability.
Implementation Method 1
for the generation of flue gas that will transfer its thermal energy to heat a liquid
Implementation Method 2
a burner can be installed (thereby forming a heat cell) for the generation of flue gas
Data Source
AI summary
A sectional heat exchanger for a heat cell. The sectional heat exchanger having two end segments and one or more intermediate segment(s) provided between the two end segments which are assembled in the heat exchanger. A combustion chamber is provided in the sectional heat exchanger, perpendicular to the one or more intermediate segment(s), each of the one or more intermediate segments having at least one flow channel for a fluid to be heated. In between each two consecutive segments at least one flow channel for flue gas is present. The total width of the sectional heat exchanger decreases over at least part of the length in the direction away from the combustion chamber. The depth of the flow channels for flue gas decreases in the direction away from the combustion chamber. The distance between the two walls delimiting the intermediate segment increases in the direction away from the combustion chamber.