1. What is Mass Flow Rate in Rankine Cycle?

Definition: This calculator determines the mass flow rate of working fluid in steam systems using the Rankine cycle.

Purpose: It helps engineers and technicians calculate the mass flow rate needed for proper system design and operation.

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)
• \( \rho \) — Density of working fluid (lb/gallon)
• 60 — Conversion factor (minutes to hours)

Explanation: The volumetric flow rate is converted to mass flow rate by multiplying by density and converting time units.

3. Importance of Mass Flow Rate Calculation

Details: Accurate mass flow rate calculation is crucial for proper sizing of boilers, turbines, condensers, and other system components.

4. Using the Calculator

Tips: Enter the volumetric flow rate in GPM and fluid density (default 8.34 lb/gal for water at 60°F). 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), standard in engineering calculations.

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

Q3: When would the density value change?
A: For different working fluids (like organic fluids in ORC systems) or water at different temperatures.

Q4: How is volumetric flow rate measured?
A: Typically using flow meters in the system piping or calculated from pump characteristics.

Q5: What are typical mass flow rates in power plants?
A: Large power plants may have mass flow rates in millions of lb/hr for the working fluid.