1. What is the Mass Flow Rate Heat Transfer Equation?

Definition: This calculator determines the heat transfer rate based on mass flow rate, specific heat capacity, and temperature difference.

Purpose: It helps engineers and technicians calculate thermal energy transfer in fluid systems like HVAC, industrial processes, and power plants.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat transfer rate (BTU/h)
• \( W \) — Mass flow rate (lb/hr)
• \( c \) — Specific heat capacity (BTU/lb·°F)
• \( \Delta T \) — Temperature difference (°F)

Explanation: The heat transfer rate equals the product of mass flow rate, specific heat capacity, and temperature change.

3. Importance of Heat Transfer Calculation

Details: Accurate heat transfer calculations are essential for system design, energy efficiency analysis, and equipment sizing in thermal systems.

4. Using the Calculator

Tips: Enter the mass flow rate in lb/hr, specific heat capacity (default 1.0 BTU/lb·°F for water), and temperature difference in °F. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is typical specific heat for water?
A: Water has a specific heat of about 1.0 BTU/lb·°F at room temperature.

Q2: How do I convert other units to lb/hr?
A: 1 kg/s ≈ 7936.6 lb/hr; 1 gpm water ≈ 500 lb/hr (approx).

Q3: Does this work for gases?
A: Yes, but use the appropriate specific heat value for the gas (typically lower than water).

Q4: What if my temperature difference is negative?
A: The calculator uses absolute value, as heat transfer direction doesn't affect magnitude.

Q5: How accurate is this calculation?
A: It provides theoretical maximum; real systems may have heat losses or other factors.