1. What is Mass Flow Rate?

Definition: Mass flow rate is the mass of a substance that passes per unit of time.

Purpose: This calculator determines mass flow rate from volumetric flow rate and density, commonly used in fluid dynamics and process engineering.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Mass flow rate (pounds per hour)
• \( \rho \) — Density (pounds per gallon)
• \( Q \) — Volumetric flow rate (gallons per minute)
• 60 — Conversion factor (minutes to hours)

Explanation: The formula converts volumetric flow to mass flow by accounting for the fluid's density and converting time units.

3. Importance of Mass Flow Rate

Details: Mass flow rate is crucial for system design, process control, and material balance calculations in chemical, petroleum, and mechanical engineering.

4. Using the Calculator

Tips: Enter the fluid density in lb/gal and flow rate in GPM. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 60 in the formula?
A: The 60 converts minutes (from GPM) to hours (for lb/hr) since mass flow rate is typically expressed per hour.

Q2: What's a typical density for water?
A: Water is approximately 8.34 lb/gal at room temperature.

Q3: Can I use different units?
A: Yes, but you'll need to adjust the conversion factor accordingly to maintain dimensional consistency.

Q4: How does temperature affect the calculation?
A: Temperature affects density (ρ), so use the density at your operating temperature for accurate results.

Q5: What if I know kg/hr but need lb/hr?
A: Multiply kg/hr by 2.20462 to convert to lb/hr.