Supply Air Demister Gutter Structure for Low Pressure Loss
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Solution Overview
Problem
Existing supply air demisters using punched metal cause scattered condensed water and pressure loss, deteriorating performance and risking engine damage.
Innovation Solution
A supply air demister with a duct and demister body featuring inclined gutter and return portions with water-repellent coating, allowing moisture to be captured and discharged without obstructing airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If punched metal is used to separate condensed water, then condensed water separation is achieved, but condensed water scatters along with supply air flow and pressure loss occurs
Solution Approach 1:
The demister body is divided into multiple gutter portions and return portions arranged in segments. Each gutter portion has a receiving surface that collects condensed water, and adjacent return portions have return surfaces that redirect water back into collection areas. This segmented structure prevents scattered water from entering the supply air flow while maintaining efficient separation.
Solution Approach 2:
The invention introduces a vertical dimension to water management by arranging gutter portions and return portions at different heights. The receiving surfaces are positioned to catch water, while return surfaces above them redirect water downward or sideways, creating a multi-level water control system that prevents horizontal scattering into the air flow path.
2Reliability
If punched metal blocks the flow path to separate condensed water, then separation function is provided, but pressure loss in supply air increases
Solution Approach 1:
The demister body structure provides different functions at different locations: gutter portions with receiving surfaces are positioned where condensed water collects, while return portions with return surfaces are positioned above them to redirect water. This localized functional arrangement achieves effective water separation without requiring complete flow path blocking, thereby reducing pressure loss.
Solution Approach 2:
The return portions act as intermediaries between the condensed water on receiving surfaces and the collection areas. The return surfaces provide a controlled path for water to return to collection zones without directly obstructing the main supply air flow, mediating between water separation needs and airflow requirements.
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
Enhances performance by reducing moisture scatter and pressure loss, minimizing the need for additional devices and lowering manufacturing and maintenance costs.
Implementation Method 1
a demister body featuring inclined gutter and return portions with water-repellent coating
Data Source
AI summary
This supply air demister comprises a duct forming a flow channel through which supply air flows upward from below, and a demister body provided above the duct. The demister body has: a plurality of gutter parts having a receiving surface depressed downward and extending obliquely, and provided side by side at intervals from each other; and a plurality of return parts provided above the gutter parts, having a return surface depressed upward, and provided side by side at intervals from each other. The return parts are configured such that a return surface overlaps with an adjacent receiving surface in the extending direction of the return surface as viewed in the vertical direction.