Fire Demand Given Value Of McDonald Coefficient Calculator

Fire Demand Formula:

\[ F = \frac{T - \left( (0.2 + 0.1 + \frac{10}{24}) \times D \right) + \left( \frac{10}{24} \times P \right)}{\frac{10}{24}} \]

Total Storage Capacity (T):

m³/s

Average Domestic Demand (D):

m³/s

Capacity of Pump (P):

m³/s

Fire Demand (F):

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1. What is Fire Demand?

Fire Demand is the amount of water required to extinguish fire in a water supply system. It's a critical parameter in designing water distribution systems to ensure adequate water supply during fire emergencies.

2. How Does the Calculator Work?

The calculator uses the Fire Demand formula:

\[ F = \frac{T - \left( (0.2 + 0.1 + \frac{10}{24}) \times D \right) + \left( \frac{10}{24} \times P \right)}{\frac{10}{24}} \]

Where:

\( F \) — Fire Demand (m³/s)
\( T \) — Total Storage Capacity (m³/s)
\( D \) — Average Domestic Demand (m³/s)
\( P \) — Capacity of Pump (m³/s)

Explanation: The formula calculates the fire demand by considering the total storage capacity, average domestic water demand, and pump capacity while accounting for various coefficients including the McDonald coefficient.

3. Importance of Fire Demand Calculation

Details: Accurate fire demand calculation is crucial for designing water supply systems that can adequately handle fire emergencies while maintaining normal domestic water supply. It helps ensure public safety and meets regulatory requirements for fire protection.

4. Using the Calculator

Tips: Enter all values in cubic meters per second (m³/s). Ensure all values are positive and valid. The calculator will compute the fire demand based on the input parameters.

5. Frequently Asked Questions (FAQ)

Q1: What is the McDonald coefficient in this context?
A: The McDonald coefficient refers to the specific coefficients (0.2, 0.1, and 10/24) used in the formula to account for various factors affecting fire demand calculation.

Q2: Why is fire demand calculation important?
A: Fire demand calculation ensures that water supply systems can provide adequate water pressure and flow during fire emergencies while maintaining normal water supply for domestic use.

Q3: What units should be used for input values?
A: All input values should be in cubic meters per second (m³/s) for consistency and accurate results.

Q4: Are there limitations to this calculation method?
A: This method provides an estimate based on standard coefficients. Actual fire demand may vary based on specific local conditions, building types, and fire protection requirements.

Q5: How often should fire demand calculations be updated?
A: Fire demand calculations should be reviewed and updated whenever there are significant changes in population density, building types, or water supply infrastructure.