Latent Heat Exchanger Vane Layout for Non-Contributing Gas Flow
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Solution Overview
Problem
Conventional heat exchangers suffer from reduced thermal efficiency due to the non-participating outer peripheral portions of heat transfer plates, where the heating gas does not contribute to heat exchange, leading to inefficient energy transfer.
Innovation Solution
The introduction of a straightening vane with top, side, and bottom plate portions that cover the end portions of heat transfer plates, redirecting the heating gas flow to enhance heat exchange efficiency by suppressing non-contributing gas flows and reinforcing the heat transfer structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heating gas flows through the outer peripheral portions of the heat transfer plates, then the flow path is extended, but the thermal efficiency is reduced because these portions do not contribute to heat exchange
Solution Approach 1:
The invention extracts and removes the non-contributing outer peripheral portions of the heat transfer plates from the heating gas flow path. By using peripheral wall portions to block the heating gas from flowing through these outer peripheral portions, the design eliminates the energy waste associated with heating areas that cannot perform heat exchange, thereby improving thermal efficiency.
Solution Approach 2:
The invention applies different flow control characteristics to different regions of the heat transfer plates. The outer peripheral portions are specifically modified to block heating gas flow, while the central portions maintain open flow paths. This localized differentiation ensures that heating gas flows only through regions that contribute to heat exchange, optimizing thermal efficiency.
2Productivity
If the heating gas flows uniformly across all heat transfer plates, then the flow distribution is simplified, but the heat exchange effectiveness is reduced in outer peripheral areas
Solution Approach 1:
The invention segments the heat transfer plate area into functional zones: central portions that allow heating gas flow for heat exchange, and outer peripheral portions that block heating gas flow. The peripheral wall portions act as separators that define these zones, creating a segmented flow path that optimizes heat exchange effectiveness in each region.
Solution Approach 2:
The peripheral wall portions serve as intermediary structures that mediate between the heating gas flow and the heat transfer plates. These wall portions selectively block the heating gas from accessing the outer peripheral portions of the heat transfer plates, thereby controlling the flow distribution to enhance heat exchange effectiveness without requiring complex active control mechanisms.
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
This configuration improves thermal efficiency by ensuring that the heating gas contributes to heat exchange across all plate areas, reducing energy loss and increasing the effectiveness of the heat exchanger.
Implementation Method 1
a heat exchange portion (11) including a plurality of heat transfer plates (11b) surrounded by the peripheral wall portion (12a, 12b) and layered on one another
Implementation Method 2
The straightening vane (15) is surrounded by the peripheral wall portion (12a, 12b) and rectifies the heating gas
Data Source
AI summary
A latent heat recovery heat exchanger includes a case, a heat exchange portion, and a straightening vane. The heat exchange portion includes a plurality of heat transfer plates surrounded by a peripheral wall portion of the case and layered on one another, each of the plurality of heat transfer plates extending in a direction from an inlet toward an outlet. The straightening vane includes a top plate portion covering the plurality of heat transfer plates so as to close a space between the plurality of heat transfer plates in end portions of the plurality of heat transfer plates in a direction intersecting with a direction of layering of the plurality of heat transfer plates when the heat exchange portion is viewed from the inlet toward the outlet.