Fan Airflow Conversion & Air-Power Calculator
Convert between CFM, m³/h and L/s, compute air power from static pressure and fan efficiency, and back out the airflow needed to carry away a given heat load.
Key points
Fan Airflow Conversion & Air-Power Calculator: Convert between CFM, m³/h and L/s, compute air power from static pressure and fan efficiency, and back out the airflow needed to carry away a given heat load. Formula: P_fan = Q·ΔP/η ｜ ΔT = P/(ρ·c_p·Q). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. 1 CFM ≈ 1.699 m³/h ≈ 0.472 L/s; the rated maximum airflow is at zero static pressure, so a real enclosure typically sees only 50–70%. Rule of thumb: 1W at a 10K rise needs about 0.085 m³/min (3 CFM); use this tool for the exact figure.
Inputs
P_fan = Q·ΔP/η ｜ ΔT = P/(ρ·c_p·Q)Calculation model (updates with parameters)
| Airflow conversion | 20.00 CFM ｜ 34.0 m³/h ｜ 9.4 L/s | |
| Mass flow | 11.1 g/s | Using 1.18 kg/m³ air density at 25°C |
| Air power (hydraulic) | 283.2 mW | Q × ΔP |
| Fan shaft power required | 943.9 mW | 效率 30% 已计入 |
| Heat this airflow removes | 167.9 W | 温liter 15K 时的散热能Force |
| Actual air temperature rise | 4.5 K | 散 50.0W 时 |
| Minimum airflow for the allowed rise | 7 CFM（13 m³/h） | 20% margin included |
Engineering notes
- 1 CFM ≈ 1.699 m³/h ≈ 0.472 L/s; the rated maximum airflow is at zero static pressure, so a real enclosure typically sees only 50–70%.
- Rule of thumb: 1W at a 10K rise needs about 0.085 m³/min (3 CFM); use this tool for the exact figure.
FAQ
- What is Fan Airflow Conversion & Air-Power Calculator for?
- Convert between CFM, m³/h and L/s, compute air power from static pressure and fan efficiency, and back out the airflow needed to carry away a given heat load.
- What is the formula for Fan Airflow Conversion & Air-Power Calculator?
- Core formula: P_fan = Q·ΔP/η ｜ ΔT = P/(ρ·c_p·Q). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Fan Airflow Conversion & Air-Power Calculator?
- 1 CFM ≈ 1.699 m³/h ≈ 0.472 L/s; the rated maximum airflow is at zero static pressure, so a real enclosure typically sees only 50–70%. Rule of thumb: 1W at a 10K rise needs about 0.085 m³/min (3 CFM); use this tool for the exact figure.