People have been asking how to calculate air compressor CFM to KW and we want to help tackle the question. CFM refers to Cubic Feet per Minute, which measures the volume of air that is coming out of an air compressor each minute. We can take that analogy one step further: where apples and oranges are still related because they are both fruit, CFM and kW are related because they both influence an air compressor’s capabilities. According to Air Compressor Guide, you can produce 5-7 CFM of air for every kW produced in industrial air compressor systems. Their gas driven rotary screw air compressor uses a Kohler 26.5 HP engine and requires 19.75 kW of power to produce 60-80 CFM. This works out to the same 3-4 CFM per kW output as the VMAC systems. Keep in mind that the Honda, Kubota and Kohler engines in the examples above are likely capable of producing higher CFM outputs under the right circumstances, but real-world designs put these systems in the 3-4 CFM per kW range. A truer estimate of kW to CFM for mobile, rotary screw air compressor applications is 3-4 CFM per 1 kW..
Learn what you need to keep your air compressor equipment running efficiently with Lewis Systems easy-to-use air compressor calculations and formulas tool. CFM of compressed air required to raise a known system pressure to a desired system pressure:C2 = Required CFM total.
how to calculate air compressor output Related Question:
How much CFM does my compressor produce?
To do this, take the number of cubic feet found in Step 7 and divide it by the number of seconds it took to pump this amount. Multiply the result by 60 and you have the CFM of your air compressor.
How do you calculate PSI to CFM?
The relationship between CFM and PSI is just linear. if you get 8 CFM at 120 psi, you will get 4 CFM at 60 PSI. The pressure just “pushes” the air out, and with half the “push” you get half the air flow.
How do you calculate the kW of a compressor?
kW = (A x V x 1.732 x pf)/1,000 Eqn 1 But, you can calculate kW from measured amperage accurately only if you simultaneously measure the voltage and power factor. Or use a kW meter or motor analyzer, which gives a direct kW reading.
What is the CFM formula?
This practical math formula goes a long way when you’re considering air ventilation improvement in an indoor space: CFM = (fpm * area), where fpm is the feet per minute. To find the cubic feet per minute, substitute the FPM value with the area after the area is squared.
How is CFM air flow calculated?
To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area.
How is air compressor efficiency calculated?
Simple Energy Formula: Motor Efficiency = Cost per KW X . 746 (Power Factor) X Hours of operation X Brake horsepower *Note: No electric motor is 100% efficient, most will average 92-95% efficient. PSI VS. BHP (Rule of thumb): For every 1 PSIG pressure drop, BHP (Brake horsepower) goes down ½ %.
How do you calculate CFM of an air line?
Start with the total volume of air (in cubic feet), divide by the exchange rate (how quickly you want to replace the air), and the result is the total CFM you need for your system.
What does 12 CFM mean?
CFM stands for cubic feet per minute. This is the air flow or air volume that a compressor can supply – or its output. Many pneumatic power tools require a CFM of about 5, but it really varies.
How do you calculate PSI?
The relationship between PSI and feet of head is that 2.31 feet of head = 1 PSI. Translated, that means that a column of water that’s 1-inch square and 2.31 feet tall will weigh 1 pound. Or, one-foot column of water that’s 1-inch square weighs . 433 pounds.
What does 150 PSI mean on an air compressor?
Psi usually isn’t a factor But a higher max psi does have one real benefit: It allows a smaller tank to hold more air and perform like a bigger tank. A 2-gallon tank at 150 psi, for example, holds as much air as a 3-gallon tank at 100 psi.
How do you calculate capacity of a compressor?
Theoretical capacity of compressor is defined by geometric measurement of air in the working area during one suction period. Then this volume is multiplied by the number of periods (cycles) per time unit.
How many CFM is a kW?
The atmosphere cubic feet / minute unit number 20.91 atm cfm converts to 1 kW, one kilowatt.
How many kwh does an air compressor use?
To find kilowatt hours, multiply the watts per hour by the total amount of time the compressor runs for. Then divide this number by 1,000. So a 15-amp air compressor that runs for three hours will use 4.95 kilowatt hours of electricity.
How many kW is a kWh?
1 kWh equals one hour of electricity usage at a rate of 1 kW, and thus the 2 kW appliance would consume 2 kWh in one hour, or 1 kWh in half an hour. The equation is simply kW x time = kWh.
What is 1 CFM?
CFM is mainly used in measurement of ventilation engineering and industrial hygiene. It states the volumetric rate of flow of any gas or air in or out of a space. The higher the CFM coefficient, the more the amount of air or gas is being pushed through that space. 1 CFM is approximately 0.47 liter per second.
