Electronic Flow Meter Reynolds Number Calculation
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Solution Overview
Problem
Current flow meters do not efficiently determine whether fluid flow through piping systems is turbulent or laminar, requiring time-consuming calculations to set optimal flow rates, leading to unnecessary energy costs and potential cooling inefficiencies.
Innovation Solution
An electronic flow meter with a flow rate sensor, temperature sensor, and processor that calculates the Reynolds number to quickly indicate whether fluid flow is turbulent or laminar, providing real-time feedback for adjusting flow rates and communicating with process control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow rate is increased to ensure turbulent flow, then cooling efficiency is improved, but energy costs increase and available cooling water for additional molds decreases
Solution Approach 1:
The flow meter provides real-time feedback on flow characteristics (laminar/turbulent indication) directly to the operator through visual displays. This feedback mechanism allows operators to monitor flow conditions continuously and make informed adjustments to maintain optimal turbulent flow without excessive energy consumption, resolving the contradiction between ensuring reliable cooling and minimizing energy use.
Solution Approach 2:
The patent replaces manual calculation and estimation of Reynolds numbers with an electronic measurement system that directly senses flow rate and temperature, then electronically processes this data to determine flow characteristics. This substitution of mechanical/manual methods with electronic sensing and processing enables precise, real-time monitoring that optimizes the balance between cooling efficiency and energy consumption.
2Measurement precision
If manual calculation of Reynolds number is used to determine flow characteristics, then flow rate can be determined, but the process is time-consuming and not conducive to quick determination
Solution Approach 1:
The patent replaces the manual mechanical process of calculating Reynolds numbers with an electronic sensing and processing system. Flow rate and temperature sensors continuously measure parameters, and an electronic processor instantly calculates and displays flow characteristics, reducing determination time from minutes to seconds while maintaining or improving measurement precision through continuous electronic monitoring.
Solution Approach 2:
The flow meter performs self-measurement and self-indication of flow characteristics. The device automatically senses flow rate and temperature, processes this data internally, and provides immediate visual feedback on flow characteristics without requiring external calculation or intervention, enabling quick determination of whether flow is laminar or turbulent.
3Quantity of substance
If existing flow meters without flow characteristic indication are used, then flow rate measurement is provided, but operators cannot quickly determine whether flow is turbulent or laminar
Solution Approach 1:
The flow meter performs multiple functions: it measures flow rate quantitatively and simultaneously determines flow characteristics (laminar/turbulent). By integrating both measurement capabilities into a single device with unified display, the patent eliminates the need for separate calculations or instruments, providing comprehensive flow information including the critical flow characteristic data that operators need for immediate decision-making.
Solution Approach 2:
The patent introduces an electronic processor and display system as an intermediary between the physical flow parameters and the operator. This intermediary automatically processes raw sensor data (flow rate and temperature) and translates it into meaningful flow characteristic information (laminar/turbulent indication), making the information accessible and actionable for operators without requiring them to perform complex 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 characteristics, optimizing energy use by ensuring turbulent flow for efficient cooling while minimizing energy costs and allowing for quick adjustments to achieve desired flow conditions.
Implementation Method 1
an impeller mounted in the flow chamber. One of the fins or vanes of the impeller has a magnet mounted thereon. A processor with a display and toggle buttons is mounted on the body. A counter type sensor extends from the processor into a depression in the body and senses and counts the rotations of the magnet on the impeller.
Implementation Method 2
A temperature sensor also extends from the processor into a depression in the body to measure the temperature of the water flowing therethrough.
Implementation Method 3
Water flowing through the chamber pushes the piston toward the distal end of the chamber against the force of the spring.
Implementation Method 4
More specifically, 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. A Reynolds number of approximately 3500 or more is understood to be indicative of turbulent flow.
Data Source
AI summary
An electronic flow meter having sensors to determine the temperature and flow rate of a fluid flowing through the flow meter and into a downstream circuit, such as a cooling water circuit, of known diameter is flowing under turbulent or laminar conditions based upon a calculation of a corresponding Reynolds number and comparison of the calculated Reynolds number to Reynolds numbers indicative of the desired flow characteristic. A display is provided to indicate the flow characteristic of the fluid flowing through the flow meter as determined by the processor.