Fluids and Flow

Velocity

1 m/s = 3,281 ft/s
1 m/s = 196,9 ft/min | FPM
1 FPM = 5,080·10-3 m/s
1 ft/sec. = 0,3048 m/s
1 Knot = 1,853 km/h
1 Nautical Mile / hour

Volume Flow

1 m³/h = 0,5885 CFM | ft³/min
1 CFM = 1,699 m³/h

For ideal gasses :
Standard cubicfeet per Minute (SCFM) / 70°F /
1 Atm. abs.
Normal cubicmeter per hour (mn 3/h) / 0°C / 1
Atm. abs.

1 SCFM luft = 1,577 mn 3/h Air (only)

Mass Flow

1 kg/h = 2,205 lb/h
1 lb/h = 0,4536 kg/h

Pressure

1 bar = 14,50 psi
1 bar = 100,0 kPa
1 bar = 0,9869 Atm.
1 mbar = 0,7501 mmHg | Torr
1 mbar = 10,20 mmWG
1 mbar = 100,0 Pa
1 psi | lbf/in² = 6,895·10-2 bar
1 psi | lbf/in² = 6,804·10-2 Atm.
1 psi | lbf/in² = 6,895 kPa

Kinematic Viscosity

1 cSt = 1,076·10-5 ft²/s
1 cSt = 1,000·10-6 m²/s
1 ft²/s = 9,290·104 cSt
1 ft²/s = 9,290·10-2 m²/s

Dynamic Viscosity

1 Pa·s = 1.000 cP
1 Pa·s = 0,6720 lb/(ft·s)
1 cP = 1,000·10-3 Pa·s | Ns/m²
1 cP = 1,000·10-3 kg/(m·s)
1 lb/(ft·s) = 1,488 Pa·s
1 lb/(ft·s) = 1488 cP | mPa·s

Heat

Temperature

°C | Celsius = 5 · (°F – 32) / 9
°F | Fahrenheit = 32 + 9 · °C / 5

Heat Content and Energy

1 kJ | kN·m = 0,9478 Btu
1 kJ | kN·m = 0,2388 Kcal
1 Btu = 1,055 kJ
1 Btu = 0,2520 Kcal
1 kcal = 4,187 kJ
1 kcal = 3,968 Btu
1 kWh = 3600 kJ
1 kWh = 859,8 Kcal

Heat Load

1 kW = 3412 Btu/h
1 kW = 859,8 Kcal/h
1 Btu/h = 2,931·10-4 kW
1 Btu/h = 0,2520 Kcal/h
1 kcal/h = 1,163·10-3 kW
1 kcal/h = 3,968 Btu/h
1 Boiler HP = 9,81 kW
1 Boiler HP = 15,65 kg steam /h

Specific Heat

1 kJ/(kg·K) = 0,2388 Btu/(lb·°F)
1 kJ/(kg·K) = 0,2388 kcal/(kg·°C)
1 Btu/(lb·°F) = 4,187 kJ/(kg·K)
1 kcal/(kg·°C) = 4,187 kJ/(kg·K)

Conductivity

1 W/(m·K) = 0,8598 kcal/(m·h·°C)
1 W/(m·K) = 0,5778 Btu/(ft·h·°F)
1 kcal/(m·h·°C) = 1,163 W/(m·K)
1 Btu/(ft·h·°F) = 1,731 W/(m·K)

Heat Transmission

1 W/(m²·K) = 0,8598 kcal/(m²·h·°C)
1 W/(m²·K) = 0,1761 Btu/(ft²·h·°F)
1 kcal/(m²·h·°C) = 1,163 W/(m²·K)
1 Btu/(ft²·h·°F) = 5,679 W/(m²·K)

Evaporation Heat

1 kJ/kg = 0,430 Btu/lb
1 Btu/lb = 2,326 kJ/kg