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Volume Flow Rate to Mass Flow Rate

Mass Flow Rate Formula:

\[ W = Q \times \rho \times 60 \]

GPM
lb/gal
lb/hr

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1. What is Volume Flow Rate to Mass Flow Rate Conversion?

Definition: This calculator converts volumetric flow rate (in gallons per minute) to mass flow rate (in pounds per hour) using fluid density.

Purpose: It's essential for engineers and technicians working with fluid systems to determine mass flow from volume measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ W = Q \times \rho \times 60 \]

Where:

Explanation: The volume flow rate is multiplied by density to get mass per minute, then multiplied by 60 to convert to hours.

3. Importance of Mass Flow Rate Calculation

Details: Mass flow rate is crucial for material balance calculations, heat transfer analysis, and process control in fluid systems.

4. Using the Calculator

Tips: Enter the volume flow rate in GPM and fluid density in lb/gal (default 8.34 for water at room temperature). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 60 in the formula?
A: This converts the flow rate from "per minute" to "per hour" since there are 60 minutes in an hour.

Q2: What's a typical density for water?
A: Water at room temperature is about 8.34 lb/gal, but this varies with temperature and impurities.

Q3: Can I use this for gases?
A: The principle is the same, but gas densities are much lower and more temperature/pressure sensitive.

Q4: How accurate is this calculation?
A: It's mathematically precise if you have accurate measurements of flow rate and density.

Q5: What if my flow rate is in different units?
A: Convert to GPM first or adjust the formula accordingly for your units.

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