If you know the FPM and you know the area of your flow say duct work (20"x20")...
first convert your area 20*20=400 in2 to Ft2
20"*20" = 400in2 400in2/144 = 2.7777Ft2
Now that you know the area in Ft2 you can use the equation [ FPM*area(ft2) = CFM ]
if your FPM is 500 and we use the 20"x20" duct then
500fpm * 2.777Ft2 = 1388.5 cfm
To convert cfm (cubic feet per minute) to kW (kilowatts), you first need to know the efficiency of the system. Once you have the efficiency, you can use this formula: kW = (cfm x pressure x efficiency) / 229. upheld wp-admin css where pressure is in psi.
You can't. Pascals (pa) area messurement of pressure. CFM (cubic feet per minute) is a rate of flow. However, there is a device called a manometer which is used to measure either pressure(in pascals) or air flow in(in cubic feet). Most commonly used for blower door tests.
The formula for heat and air units is typically calculated using the formula: BTU = (CFM x ΔT x 1.08) where BTU represents British Thermal Units, CFM is Cubic Feet per Minute, ΔT is the temperature change in degrees Fahrenheit, and 1.08 is a constant for air with a density of 0.075 pounds per cubic foot.
3,960 feet per minute.
To convert kilopascals (kPa) to cubic feet per minute (CFM), you need to know the flow rate of the gas or air in question and the pressure in kPa. The specific conversion factor will depend on the specific gas being used, its temperature, and other factors. You may need to consult engineering tables or use online conversion tools to perform an accurate conversion.
You can convert in w.c. to feet per minute and then convert fpm to CFM. FPm is 4005 times the square root of the pressure. So to convert 1 " w.c. to fpm its the square root of 1, which is 1 times 4005, which is 4005 fpm. Then you multiply the fpm by the area of the space the air is moving through. So if you have 1 " wc moving through a hole that's 1 square foot in area, that's 4005 cubic feet per minute.
You can convert in w.c. to feet per minute and then convert fpm to CFM. FPm is 4005 times the square root of the pressure. So to convert 1 " w.c. to fpm its the square root of 1, which is 1 times 4005, which is 4005 fpm. Then you multiply the fpm by the area of the space the air is moving through. So if you have 1 " wc moving through a hole that's 1 square foot in area, that's 4005 cubic feet per minute.
To convert cmh to cfm ..... divide cmh by 1.7 to convert into cfm....
To calculate CFM (cubic feet per minute), you need to know the volume of the space in cubic feet and how many times you want to replace the air within one minute (air changes per hour rate). Multiply the volume of the space by the air changes per hour rate and divide by 60 to get the CFM required for that space. CFM = (Volume in cubic feet * Air changes per hour) / 60.
Tr = cfm/400
To convert cfm (cubic feet per minute) to kW (kilowatts), you first need to know the efficiency of the system. Once you have the efficiency, you can use this formula: kW = (cfm x pressure x efficiency) / 229. upheld wp-admin css where pressure is in psi.
To convert BTU (British Thermal Units) to CFM (Cubic Feet per Minute), you need to know the specific heat of the material being heated or cooled. The formula to convert is: CFM = (BTU/hr) / ((Temperature rise in °F) x (Specific heat of material)).
Coverting MMSCFD which is million standard cubic feet per day to CFM or cubic feet per minute requires knowing how many minutes are in a day. This can be determined by multiplying 60 by 24 and then dividing the MMSCFD by this product.
divide by 60
formula
1,000 cfm (feet3/min) is 0.4719474 m3/sec.
Take the number of cubic feet and divide that by the number of minutes. cfm=cf/m