Which is the correct formula for air flow?

Air Flow formulas CFM =Duct area sq ft x Velocity Standard Air=70F @ 29.92” HG (Mercury) 1 cubic foot of standard air =0.075 pounds 13.3 cubic feet of standard air= 1 pound FAN LAWS: Remember RPM is interchangeable for CFM

How to calculate maximum flow in linear time?

Note that the path search just needs to determine whether or not there is an s-t path in the subgraph of edges e with f (e) < C (e). This is easily done in linear time using BFS or DFS. For above graph there is no path from source to sink so maximum flow : 3 unit But maximum flow is 5 unit. to over come form this issue we use residual Graph.

How is the heat of air measured in CFM?

The air is measured in CFM, yet the specific heat is per pound of air. The weight per cubic foot of air (0.075 lbs) is needed to convert between the air volume and weight. Also contained in the 1.08 factor is the number of minutes in an hour (60 minutes per hour).

How to calculate a / C cooling load and capacity?

Total air per minute = (800 ft3/min) / (13.75 ft3/lb.) = 58.2 lb./min Total air per min x 60 = 3,490 lb./hr. With the heat absorption (system enthalpy) of 8.6 BTU/lb. of air, the system thermal (load) capacity is: Cooling Load Capacity = 3,490 lb./hr. x 8.6 BTU/lb. = 30,014 BTU/hr. 30,014 BTU/hr. / 12,000 BTU/hr. = 2.50 tons

How many CFM is needed to cool one ton of air?

1 CFM/Sq.Ft. of living space, or 1 x 2000 or a total of 2000 CFM of air flow into the total occupied building space. Now divide the total CFM required by 400 CFM (typical air flow per ton of cooling capacity of an air handler)

How does an anemometer measure air flow rate?

The hot wire anemometer uses a heated wire that is cooled by the movement of air across the wire. Some devices such as the Amprobe TMA 10A Anemometer with remote vane/sensor can measure air velocity (air speed in ft/min or meters/sec) and air flow rate (m3/sec or ft/min), and air temperature.

How is the flow rate of an air conditioner rated?

Fans such as a blower assembly of an air conditioner or forced-air heating system are rated at a cubic feet per minute of air that the fan can move, presuming a particular rotating speed. Sketch courtesy Carson Dunlop Associates, a Toronto home inspection, education, & report writing tool company.