Calculating cfm from fpm
[DOCX File]Home | Infrastructure Planning and Facilities
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Michigan State University. Construction Standards. TESTING, ADJUSTING, AND BALANCING FOR HVAC. Page 230593-1. 230593TABforHVAC.docx. Rev. 10/11/2018
[DOC File]Cross Sectional Areas in Ports
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Since we are interested in velocity, it is imperative to know the area of the port. If the port area was expressed in square feet (ft2), then dividing the flow value in CFM by the area in ft2 (square feet) of the port, the result is FPM (feet per minute). Dividing FPM by 60 yields FPS (feet per second).
[DOC File]A VBASIC SPREADSHEET TO CALCULATE DUCT DIAMETER
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cfm. in. fpm. f' L. fan out. tee thru. diffuser. fan in. Fixtures. Fixture C. el. tee branch. dp. ret grille. code. count. Duct Size and Rectangular/round duct conversion. D=alog(.38352*log(cfm) + .00864) dia. height. width. branch. diff. dp = (12*f*L*rho*(V/1097)^2)/D. dp/100' Colbrook. 1/f^.5 = -2*log(12*e/3.7/D+2.51/Re/f^.5) Project. System-Zone. calculation date. system-zone
[DOC File]Duct Segment Identification: IN
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Volumetric Flow rate Q = 1169.7 cfm. By adding the volumetric flow rate of DE and corrected volumetric flow rate of section EF . Minimum Transport Velocity (Vt) = 3500 fpm. Maximum Duct Diameter = 7.8” Selected Duct Diameter = 7” Duct Area = 0.267 sq. ft. Actual Duct Velocity = 4379 fpm. Duct Velocity Pressure, VP = 1.1955” wg. Maximum ...
[DOC File]FORMULA SHEET - Homestead
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FPM = 4005 x √V.P Where FPM = Feet Per Minute. or VP = { FPM } 2 4005 Non-Standard Air. FPM = 1096 * VP Density Air Flow for Furnaces. Gas Furnace. CFM = Heat value of gas (BTU/cu ft) x cu ft/hr x Comb. Eff. 1.08 x Temp. Rise Oil Furnace. CFM = Heat value of oil (BTU/Gal) x gal/hr x …
[DOC File]Duct Segment Identification: IN
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Target Volumetric Flow rate (Design) Q = 350 cfm (Given) By adding the volumetric flow rate of DE and corrected volumetric flow rate of section EF . Minimum Transport Velocity (Vt) = 3500 fpm. Maximum Duct Diameter = 7.8” Selected Duct Diameter = 7” Duct Area = 0.267 sq. ft. Actual Duct Velocity = 4378 fpm…
[DOC File]Determining Port Velocity
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Since we measure flow in cubic feet per minute, we use the first formula and divide by the cubic feet of cross section area: If we have an average cross section of 2.1 square inches: Volume = Velocity (21,190 fpm) x Area (2.1 sqin x 1 sqft/144 sqin - converts sqin to sqft) = 309 cfm @ 28”
[DOC File]SECTION 233416 - CENTRIFUGAL HVAC FANS
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A flanged bifurcated fiberglass reinforced plastic (FRP) discharge nozzle shall be supplied by the fan manufacturer and be designed to efficiently handle an outlet velocity of up to 7200 FPM. The discharge shall include a venturi and windband to induce ambient air up to 270 percent of fan capacity.
Test Your Knowledge Study Questions - Home - ACCA
Calculating airflow in watts. Airflow across the evaporator. Airflow through duct systems. ... what is the CFM if the fan is in low speed, and what is the CFM if it is in high speed? ... Which one of the following tools may not be used to measure the airflow coming out of a supply diffuser in FPM or CFM? Airflow measuring device/capture hood ...
[DOCX File]SECTION 25 0910 - LABORATORY AIRFLOW CONTROLS PART 1 - GENERAL
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hood occupancy status. The device shall be configurable to display one of the following measurement units; cubic feet per minute (CFM), meters cubed per hour (m3/h), liters per second (l/s), feet per minute (FPM), or meters per second (m/s). This device shall have the ability to display system errors …
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