Dry Air Properties Calculator
| Property | Meaning | Units |
|---|---|---|
| Temperature | 20 | °C |
| Density | 1.204 | kg/m³ |
| Heat capacity (cp) | 1.005 | kJ/(kg K) |
| Thermal conductivity | 0.0257 | W/(m K) |
| Dean.viscosity | 1.82e-5 | Pass |
| Kin.viscosity | 1.51e-5 | m²/s |
| Speed of sound | 343.2 | m/s |
| Prandtl number | 0.713 | - |
| Pace.(°C) | Density(kg/m³) | Warm.(kJ/(kg K)) | Heat transfer(W/(m K)) | Dean.mating(Pass) | Kin.mating(m²/s) | Sound (m/s) |
|---|
Data sources:
- Density: ρ = P/(R T), R = 287.05 J/(kg K)
- Heat capacity: cp = 1.005 + 0.00005 T (kJ/(kg K))
- Thermal conductivity: k = 0.0241·(T/273.15)0.9 (W/(m K))
- Viscosity: μ = (1.458 10-6·T1.5)/(T + 110.4) (Pa s)
- Speed of sound: a = √(1.4·287.05·T)
- Prandtl number: Pr = μ·cp/k
- Data verified from ASHRAE Handbook, Fluid Mechanics (White), Fundamentals of Heat Transfer (Incropera)
Note: Calculations for dry air at normal atmospheric pressure.For accurate calculations, use specialized reference books.