Hydrofor Flow Rate Calculation: Formula and Examples

How to Calculate Hydrofor Flow Rate Q (m³/h)?

Calculating the flow rate of a hydrofor depends on the purpose of its intended location. The calculation for a hydrofor designed for residential use differs from that of one intended for dormitories, schools, gyms, or industrial facilities. This distinction stems from the co-usage factor (f), which is determined by the nature of the location.

What is the Co-Usage Factor?

The co-usage factor estimates how many users will simultaneously use water in a multi-user system (e.g., an apartment building). This factor considers:

• The number of independent units (e.g., apartments) and the number of people per unit in residences.
• The number of beds in hospitals and hotels.
• The number of employees in workplaces.

Hydrofor Flow Rate Calculation Formula

The flow rate of a hydrofor can be calculated using the following formula:

Q (m³/h) = A * B * T * f

Variables in the Formula:

• A: Number of apartments or independent units in the building.
• B: Number of people per unit.
• T: Average water consumption per individual (liters/day).
• f: Co-usage factor.

Average Values in Turkey

General assumptions about water consumption in Turkey:

• An average family consists of 4 individuals.
• Daily water consumption per person ranges from 100-300 liters.

Average water consumption varies based on living standards and the purpose of the location. Referencing existing standards or water consumption tables can help refine the calculation.

Example Calculation

Example Scenario: Calculating the hydrofor flow rate for a residential complex with 100 apartments.

• A: 100 (number of apartments)
• B: 4 (number of people per apartment)
• T: 150 liters (daily water consumption per individual)
• f: 0.25 (co-usage factor)

Q:
Q = 100 × 4 × 150 × 0.25
Q = 15,000 liters/hour (15 m³/h)

Selecting the Appropriate Hydrofor

In this example, a hydrofor system providing 15 m³/h flow rate is suitable. Recommended system options include:

1. Two-pump system: Each pump delivers 15 m³/h.
2. Three-pump system: Each pump delivers 7.5 m³/h.

Advantages of Multi-Pump Systems:

• Redundancy: The system continues to operate if one pump fails.
• Energy efficiency: Pumps operate alternately based on demand.
• Comfort: Ensures consistent water supply.
• Longevity: Extends the lifespan of the pumps.

For hydrofor systems with a capacity of 6 m³/h or higher, multi-pump systems are more efficient and preferable.