1. What is a Gas Mass Flow Rate Calculator?

Definition: This calculator estimates the mass flow rate of gas based on volumetric flow rate and gas density.

Purpose: It helps engineers and technicians determine the mass flow of gases in various industrial and mechanical systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Mass flow rate (lb/hr)
• \( Q \) — Volumetric flow rate (gallons per minute)
• \( \rho_g \) — Gas density (lb/gallon)

Explanation: The volumetric flow rate is converted to mass flow by multiplying by gas density and converting minutes 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 gas handling systems.

4. Using the Calculator

Tips: Enter the volumetric flow rate in GPM and gas density in lb/gal (default 0.3 for natural gas). 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 output).

Q2: What's a typical gas density value?
A: Natural gas is typically ~0.3 lb/gal, but this varies with gas composition, temperature and pressure.

Q3: Can I use this for compressed gases?
A: Yes, but you must use the correct density value for the compressed gas at operating conditions.

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

Q5: What if my flow is in different units?
A: Convert to GPM before using this calculator or adjust the formula accordingly.