1. What is Mass Flow Rate and Volumetric Flow Rate?

Definition: This calculator converts between volumetric flow rate (gallons per minute) and mass flow rate (pounds per hour) for fluids.

Purpose: It helps engineers and technicians in fluid systems to calculate mass flow when volumetric flow is known, or vice versa.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Mass flow rate (lb/hr)
• \( Q \) — Volumetric flow rate (GPM)
• \( \rho \) — Fluid density (lb/gal)
• 60 — Conversion factor (60 minutes/hour)

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

3. Importance of Flow Rate Calculations

Details: Accurate flow rate calculations are essential for system design, pump sizing, process control, and energy calculations in fluid systems.

4. Using the Calculator

Tips: Enter the volumetric flow rate in GPM and fluid density in lb/gal (default 8.34 for water at 60°F). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 60 in the formula?
A: The 60 converts minutes to hours since GPM is per minute and we typically want lb/hr.

Q2: What's a typical density for water?
A: Water at 60°F is 8.34 lb/gal, but this varies with temperature and dissolved solids.

Q3: Can this be used for gases?
A: For gases, you'd need to account for compressibility and use standard cubic feet per minute (SCFM).

Q4: How do I find the density of other fluids?
A: Consult material safety data sheets (MSDS) or chemical engineering references for specific fluids.

Q5: What if I know mass flow and need volumetric flow?
A: Rearrange the formula: \( Q = \frac{W}{\rho \times 60} \)