Enter the air flow in cubic feet per minute (CFM), the efficiency of the system, and the cost of electricity to calculate the power in kilowatts (kW).
CFM to kW Formula
The following formula is used to convert CFM to kW:
kW = (CFM * Electricity Cost) / (Efficiency * 3412)
Variables:
- kW is the power in kilowatts
- CFM is the air flow in cubic feet per minute
- Electricity Cost is the cost per kilowatt-hour
- Efficiency is the system efficiency as a decimal
- 3412 is the conversion factor from BTU/hr to kW
To calculate the power in kilowatts, multiply the air flow in CFM by the cost of electricity, and then divide by the product of the system efficiency and the conversion factor of 3412.
What is CFM to kW Conversion?
CFM to kW conversion is a calculation used to determine the power required to move a certain volume of air. This is particularly useful in HVAC systems and other applications where air flow is a critical component. The conversion takes into account the efficiency of the system and the cost of electricity to provide a measure of the power in kilowatts.
How to Calculate Power in kW from CFM?
The following steps outline how to calculate the power in kW from CFM.
- First, determine the air flow in CFM.
- Next, determine the efficiency of the system as a decimal.
- Next, determine the cost of electricity per kilowatt-hour.
- Use the formula above to calculate the power in kW.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Air flow (CFM) = 500 CFM
Efficiency (as a decimal) = 0.8
Electricity Cost (per kWh) = $0.12
