1. What is a Heat Rate Calculator?

Definition: This calculator determines the heat rate (HR) which measures the thermal efficiency of power generation by comparing fuel energy input to electrical energy output.

Purpose: It helps energy professionals assess power plant efficiency and fuel consumption.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HR \) — Heat rate (kJ/kWh)
• \( FH \) — Fuel heat input (kJ)
• \( EG \) — Electricity generated (kWh)

Explanation: The fuel energy is divided by the electrical output to determine how much thermal energy is required to produce one unit of electricity.

3. Importance of Heat Rate Calculation

Details: Lower heat rates indicate more efficient power generation. Monitoring heat rate helps optimize fuel usage and reduce operating costs.

4. Using the Calculator

Tips: Enter the total fuel heat in kJ and electricity generated in kWh. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a good heat rate value?
A: Typical values range from 7,500-10,000 kJ/kWh for modern plants. Lower values indicate better efficiency.

Q2: How does heat rate relate to efficiency?
A: Efficiency (%) = (3600/HR) × 100 (where 3600 kJ = 1 kWh)

Q3: What factors affect heat rate?
A: Plant design, fuel quality, operating conditions, maintenance status, and ambient temperature.

Q4: Can I use different units?
A: Yes, but maintain consistency (e.g., BTU for fuel and kWh for electricity gives BTU/kWh).

Q5: Why monitor heat rate over time?
A: Increasing heat rate may indicate equipment degradation or operational issues.