1. What is a Steam Boiler BTU Calculator?

Definition: This calculator estimates the BTU output of a steam boiler based on steam flow rate and the latent heat of vaporization.

Purpose: It helps engineers and technicians determine the heat energy required to produce steam at a given rate.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — British Thermal Units per hour (BTU/h)
• \( Steam\ Flow \) — Mass flow rate of steam (pounds per hour)
• \( h_{fg} \) — Latent heat of vaporization (BTU per pound)

Explanation: The steam flow rate multiplied by the energy required to vaporize water gives the total heat energy output.

3. Importance of BTU Calculation

Details: Accurate BTU calculation ensures proper boiler sizing, fuel efficiency, and system performance.

4. Using the Calculator

Tips: Enter the steam flow in lb/h and latent heat (default 970 BTU/lb for water at atmospheric pressure). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is h_fg (latent heat of vaporization)?
A: The energy required to change water to steam without temperature change, typically 970 BTU/lb at atmospheric pressure.

Q2: How does pressure affect h_fg?
A: As pressure increases, h_fg decreases. Use 900 BTU/lb for 100 psi, 850 BTU/lb for 200 psi systems.

Q3: What's a typical steam flow rate?
A: Residential boilers: 100-500 lb/h, commercial: 1,000-50,000 lb/h, industrial: 50,000+ lb/h.

Q4: How do I convert BTU/h to boiler horsepower?
A: Divide BTU/h by 33,475 (1 boiler HP = 33,475 BTU/h).

Q5: Does this include efficiency losses?
A: No, this is theoretical output. Actual fuel input would be higher based on boiler efficiency.