Rotatable Scale Flow Meter for Turbulent Cooling
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Solution Overview
Problem
Current flow meters are time-consuming and inefficient in determining whether fluid flow through piping systems is turbulent or laminar, leading to unnecessary energy costs and potential limitations in cooling efficiency in molding applications.
Innovation Solution
A flow meter with a rotatable sleeve featuring scales with temperature set points that indicate the required flow rate to achieve turbulent or laminar flow, allowing users to quickly select the appropriate flow rate for specified pipe diameters and temperatures, ensuring optimal flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If flow rate is increased to ensure turbulent flow, then cooling efficiency is improved, but energy costs for pumping increase
Solution Approach 1:
The flow meter includes pre-calculated flow rate indicators on its scale that correspond to turbulent flow conditions for different pipe diameters and temperatures. Users can directly read the required flow rate from the scale without performing calculations, allowing them to set the flow rate in advance to achieve turbulent flow while avoiding excessive pumping energy consumption.
Solution Approach 2:
The flow meter automatically provides the necessary flow rate information through its calibrated scale, eliminating the need for users to manually calculate Reynolds numbers or determine appropriate flow rates. The device serves itself by providing ready-to-use flow rate indicators that ensure turbulent flow conditions are met without requiring additional energy-intensive calculations or adjustments.
2Temperature
If flow rate is maximized to ensure turbulent flow, then cooling performance is improved, but available cooling water for additional molds is reduced
Solution Approach 1:
The flow meter provides pre-calculated flow rate indicators that show the minimum flow rate needed to achieve turbulent flow for different pipe diameters and temperatures. This allows operators to set the flow rate to the lowest necessary level that still ensures turbulent flow, thereby conserving cooling water for additional molds while maintaining adequate cooling performance.
Solution Approach 2:
The flow meter scale is calibrated with flow rate values that correspond to specific Reynolds numbers (indicating turbulent flow conditions) for different pipe diameters and temperatures. By using this calibrated scale, operators can adjust the flow rate parameter to the optimal value that ensures turbulent flow without excessive water consumption, thus improving water availability for multiple molds.
3Measurement precision
If flow rate is determined using traditional flow meters and Reynolds number calculations, then accurate flow measurement is achieved, but determination time increases
Solution Approach 1:
The flow meter includes a pre-calibrated scale with flow rate indicators that are predetermined for different pipe diameters and temperatures to achieve turbulent flow. Users can directly read the required flow rate from the scale without performing Reynolds number calculations, significantly reducing determination time while maintaining measurement accuracy.
Solution Approach 2:
The flow meter scale is a visual copy of the Reynolds number calculation results, presenting the complex calculation in a simplified, ready-to-read format. Instead of requiring users to perform the full Reynolds number calculation, the scale provides pre-computed flow rate values that correspond to turbulent flow conditions, making the information immediately available without time-consuming calculations.
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
Enables rapid determination of flow rates for turbulent or laminar conditions, optimizing energy use and cooling efficiency by minimizing unnecessary water flow, while ensuring consistent flow regimes in molding processes.
Implementation Method 1
the volumetric flow rate times the pipe diameter divided by the kinematic viscosity (which is temperature dependent) produces what is referred to as the Reynolds number
Data Source
AI summary
A flow meter having a scale with temperature set points corresponding to a flow rate that a known fluid flowing therethrough at the set point temperature must reach to ensure turbulent flow of the fluid through a cooling system of a specified diameter. The flow meter preferably includes a plurality of scales, each having temperature set points corresponding to a different sized passageway in the mold cooling system. The scales are printed on a sleeve, rotatably mounted on a cylindrical body of the flow meter. The scales are selectively rotated into view by an operator to permit the operator to use the appropriate scale corresponding to the diameter of the passageways of the cooling system with which the flow meter is to be used.