1. What is the CFH Formula?

The CFH (Cubic Feet per Hour) formula converts MMBtu (million British thermal units) to volumetric flow rate based on the Higher Heating Value (HHV) of the gas. It's commonly used in natural gas calculations.

2. How Does the Calculator Work?

The calculator uses the CFH equation:

Where:

• \( MMBtu \) — Energy in million British thermal units
• \( HHV \) — Higher heating value in Btu per cubic foot
• \( 1,000,000 \) — Conversion factor (MMBtu to Btu)
• \( 24 \) — Conversion factor (day to hour)

Explanation: The equation converts energy units (MMBtu) to volumetric flow rate (cubic feet per hour) based on the energy content of the gas.

3. Importance of CFH Calculation

Details: Accurate CFH calculation is crucial for gas system design, equipment sizing, fuel consumption monitoring, and billing verification in natural gas applications.

4. Using the Calculator

Tips: Enter MMBtu value (energy content) and HHV (energy content per cubic foot of gas). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between HHV and LHV?
A: HHV (Higher Heating Value) includes the heat of vaporization of water in combustion products, while LHV (Lower Heating Value) does not.

Q2: What are typical HHV values for natural gas?
A: Typical natural gas HHV ranges from 1,000 to 1,100 Btu/cf, with an average around 1,030 Btu/cf.

Q3: Why divide by 24 in the formula?
A: The division by 24 converts from daily flow (standard in MMBtu/day) to hourly flow (CFH).

Q4: Can this be used for other gases besides natural gas?
A: Yes, but you must use the correct HHV for the specific gas composition.

Q5: How does temperature and pressure affect the calculation?
A: The calculation is based on standard cubic feet (typically at 60°F and 14.73 psi), so actual conditions may require additional corrections.