❓ FIRE PUMP CALCULATION:

How do you calculate Fire Pump Flow Rate?

Formula:

Total Flow =
Sprinkler Demand + Hydrant Demand

Example:

Sprinkler Flow = 1,000 L/min
Hydrant Flow = 500 L/min

Total Flow =
1,000 + 500

= 1,500 L/min

Convert to m³/hr:

1,500 × 60 ÷ 1,000
= 90 m³/hr

✅ Fire Pump Flow Rate = 90 m³/hr

Final pump flow should be determined from the applicable fire-protection standard and hydraulic calculation.

#FirePump #FirePumpCalculation #FireProtection #MEPEngineering #PumpCalculation

❓ CHILLER CALCULATION:

How do you calculate Chilled Water Flow Rate?

Formula:

Q = Cooling Capacity ÷ (ρ × Cp × ΔT)

Example:

Cooling Capacity = 350 kW
Water Density (ρ) = 1000 kg/m³
Cp = 4.186 kJ/kg·K
ΔT = 5°C

Mass Flow =
350 ÷ (4.186 × 5)

≈ 16.73 kg/s

Convert to m³/hr:

16.73 × 3.6
≈ 60.2 m³/hr

✅ Chilled Water Flow Rate ≈ 60.2 m³/hr

This calculation is useful for preliminary chiller, chilled water pump and pipe sizing.

#ChillerCalculation #HVAC #MEPEngineering #ChilledWater #HVACDesign

3 Main components of the fire Hydrant System?
1 ...
2 ...
3 ...

Belt tension - tight side, slack side, and the setup tension you need before starting.

Te = Px1000/v | T₁/T₂ = e^(μθ)

P=7.5kW | v=10m/s | μ=0.35 | 0=160°=2.79rad

Te = 750N | e^(μθ) = e^0.977 = 2.657

T₁ = 750×2.657/1.657 = 1,203 N (tight side)

T₂ = 1,203-750 = 453 N (slack side)

Initial setup tension: Ti = (1,203+453)/2 = 828N per strand

Under-tension: belt slips. Over-tension: bearing loads too high, belt fatigue. Get it right and the belt lasts years.

Save this belt tension calculation reference.

Do you use a tension gauge or the deflection method to set your belt tension?

#BeltTension #BeltDrive #Mechanical Engineering

Contactor और Relay में क्या अंतर है?

Mechanical engineering formulas and examples