1. What is Rate of Mass Flow?

Definition: This calculator determines the mass flow rate of a fluid based on its volumetric flow rate and density.

Purpose: It helps engineers and technicians calculate how much mass of a fluid is moving through a system per unit time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The volumetric 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: Accurate mass flow rate calculations are essential for system design, process control, and equipment sizing in fluid systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 60 in the formula?
A: The factor converts minutes (from GPM) to hours (for lb/hr) since there are 60 minutes in an hour.

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

Q3: Can I use this for gases?
A: The formula works for any fluid, but gas densities are typically much lower and vary significantly with pressure and temperature.

Q4: How do I find the volumetric flow rate?
A: Use flow meters or calculate from pipe diameter and velocity measurements.

Q5: What units does this calculator use?
A: US customary units (GPM, lb/gal, lb/hr). For metric units, different conversion factors would be needed.