Fire Protection Conduit Micro-Channel Surface Friction Reduction
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Solution Overview
Problem
Fire protection systems experience significant friction loss and pressure loss due to the interaction between fire suppressant fluids and system components, limiting the efficiency and requiring higher supply pressures or larger piping and pumps.
Innovation Solution
The integration of surfaces with orthogonal channels and ridges in fire protection system components, such as conduits and discharge devices, reduces friction by creating a slippery surface topology that disrupts fluid droplet formation and utilizes surface tension, thereby enhancing fluid flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional smooth surfaces are used in fire protection system components, then manufacturing is simple and cost-effective, but friction loss and pressure loss are significant
Solution Approach 1:
The patent applies a porous or micro-channeled surface coating on the interior of fire protection system components. This coating creates a network of microscopic channels that reduce friction between the suppressant fluid and the pipe wall, thereby reducing friction loss and pressure drop without significantly complicating the manufacturing process.
Solution Approach 2:
The patent changes the surface parameters by introducing micro-scale geometric features (channels, ridges, or porous structures) with specific dimensions and patterns. These parameter changes at the micro-scale achieve macro-scale benefits in reducing friction loss while maintaining manufacturability through conventional coating or forming techniques.
2Stress or pressure
If higher supply pressure is used to overcome friction loss, then discharge pressure is maintained, but energy consumption and system cost increase
Solution Approach 1:
The patent converts the harmful friction interaction between fluid and pipe wall into a beneficial low-friction interface through the use of micro-channeled surfaces. The microscopic channels create a lubricating effect that reduces friction, allowing the system to maintain discharge pressure with lower supply pressure, thereby reducing energy consumption.
3Loss of energy
If larger piping is used to reduce friction loss, then pressure loss is reduced, but system cost and installation complexity increase
Solution Approach 1:
Instead of changing the overall pipe diameter, the patent applies local quality changes to the pipe interior surface by introducing micro-channeled structures. This localized modification reduces friction loss without requiring larger piping, thereby avoiding increased installation complexity and system cost while maintaining pressure loss reduction benefits.
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 solution reduces friction loss and pressure loss across the system, allowing for increased discharge pressure or reduced supply pressure, potentially downsizing piping and eliminating the need for pumps, while maintaining system efficiency and cost-effectiveness.
Implementation Method 1
creates a slippery surface topology that disrupts fluid droplet formation and utilizes surface tension
Implementation Method 2
reduces friction by creating a slippery surface topology
Data Source
AI summary
A fire protection system includes a conduit, with a fluid passageway for receiving fire suppressant fluid from a fire suppressant fluid supply, a discharge device in fluid communication with the conduit for dispersing the fire suppressant fluid and at least one surface at the conduit or the discharge device across which the fire suppressant fluid flows, which surface has a plurality of channels extending across the surface in a direction generally orthogonal to the flow of fluid.