Fire Suppression - FM200/HFC227ea

How to Design FM-200 gas-based fire suppression system:
1. Determine the Volume of the Protected Space (V):
– Calculate the volume of the space that needs protection.
Use the formula:
[ V = L \times W \times H]
– For example, if the space is 10 meters long, 8 meters wide, and 4 meters high:
[V = 10 \times 8 \times 4 = 320 \, \text{m}^3]
2. Determine the Design Concentration (C):
– Identify the fire hazard classification. For C-type hazards, the design concentration is typically 7.20%.
Apply a safety factor to account for uncertainties. Here, the safety factor is 1.2.
– Calculate the final design concentration:
[C = 7.20 \times 1.2 = 8.64 \%]
3. Calculate the Specific Vapor Volume (S):
– This depends on the minimum temperature in the protected area. Use the formula:
[S = 0.1269 + (0.0005 \times T)\]
– For a minimum temperature \( T \) of 21°C:
[S = 0.1269 + (0.0005 \times 21) = 0.1374 \, \text{m}^3/\text{kg}]
4. Calculate the Required FM-200 Weight (W):
– Use the formula to find the weight of FM-200 needed:
[W = \frac{V}{S} \times \frac{C}{100 – C}]
– Plug in the values:
[W = \frac{320}{0.1374} \times \frac{8.64}{100 – 8.64}]
– This calculation gives approximately 203.62 pounds of FM-200 needed.
5. Determine the Number of Nozzles:
– First, find the protected area in square feet:
[text{Protected Area} = L \times W]
– For a space of 10 feet by 8 feet:
[text{Protected Area} = 10 \times 8 = 80 \, \text{ft}^2]
– Coverage Area per Nozzle:
– 90° corner nozzle: Covers 95 ft²
– 180° corner nozzle: Covers 190 ft²
– 360° corner nozzle: Covers 380 ft²
Based on these coverage areas, determine how many nozzles are required to cover the protected area effectively.
By following these steps, user can accurately design an FM-200 fire suppression system tailored to your specific needs.