Flow Channel With Multiple Controllable Circulation Lines
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Solution Overview
Problem
Existing flow channels in circulation lines experience varying flow rates due to frictional resistances and turbulences, leading to inconsistent flow patterns that are difficult to correct with existing deflection systems.
Innovation Solution
A flow channel design with multiple controllable circulation lines that distribute outlets over the end wall, allowing for individual regulation of flow velocities using adjustable delivery devices, and optional de-aeration to maintain laminar flow, coordinated by a control unit with sensors for real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single circulation line with a delivery device is used, then the device complexity is low, but the flow velocity uniformity across the channel cross section deteriorates due to frictional resistances and turbulences
Solution Approach 1:
The single circulation line is segmented into multiple circulation lines (first, second, third circulation lines) with separate delivery devices. Each circulation line serves a specific zone (first zone near bottom wall, second zone in middle, third zone near top wall), allowing independent flow velocity control in each zone to achieve uniform flow distribution across the channel cross section.
Solution Approach 2:
Different circulation lines are configured with different delivery device characteristics (impeller diameters, rotation speeds) to create locally optimized flow velocities. The first delivery device operates at higher speed for the bottom zone, the second at medium speed for the middle zone, and the third at lower speed for the top zone, compensating for varying frictional resistances at different heights.
2Stability of the object's composition
If deflection systems or egg crate grids are added to correct flow patterns, then the flow velocity uniformity improves, but the device complexity increases and energy loss increases due to braking and deflection elements
Solution Approach 1:
The patent removes the need for deflection systems, egg crate grids, and other flow correction components by directly addressing the root cause through multiple circulation lines. The flow uniformity is achieved through the inherent distribution of multiple delivery devices rather than adding corrective elements, thereby reducing device complexity and eliminating associated energy losses.
Solution Approach 2:
The flow uniformity is established in advance through the strategic configuration of multiple circulation lines and delivery devices before water enters the flow channel. By pre-distributing flow velocities across different zones through properly positioned delivery devices, the system eliminates the need for subsequent flow correction that would require additional components.
3Stability of the object's composition
If multiple circulation lines with separated outlets distributed over the end wall are used, then the flow velocity uniformity improves, but the device complexity increases
Solution Approach 1:
Each circulation line and delivery device is designed to perform multiple functions: creating flow velocity in its specific zone, compensating for frictional resistances at different heights, and contributing to the overall uniform flow distribution. This multi-functionality reduces the need for additional specialized components, offsetting the complexity increase through functional integration.
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 design achieves uniform flow velocities across the channel, reducing the need for braking and deflection elements, enhancing energy utilization and flow pattern consistency, and allowing for adaptable flow regulation to compensate for resistance variations.
Implementation Method 1
a plurality of circulation lines 2, 3, 4 each having a controllable delivery device 6 is provided, whereby the circulation lines discharge separated from one another into the flow channel
Implementation Method 2
the intake openings in the circulation lines can be disposed in the opposite end wall at the same height compared with the outlets in the flow channel. This achieves that the water can flow in a laminar manner in the flow channel
Data Source
AI summary
A flow duct is provided in which water is caused to flow by way of a delivery device disposed in a circulation line. In order to be able to adapt the flow inside the duct to the particular requirements, and/or achieve a laminar flow over the entire flow region, a plurality of circulation lines is provided, each having a controllable delivery device, wherein the circulation lines lead into the flow duct separately from each other, and wherein the discharge openings of the circulation lines are distributed over the face wall of the flow duct.