Fluid Mechanics: Fan Power to Overcome Pressure Loss?

Jan 21, 2009 by KK | Posted in Engineering

Air enters a 7-m-yearn section of a rectangular duct of cross section 15 cm x 20 cm made of commercial bear up at 1 atm and 35 °C at an average velocity of 7 m/s. Disregarding the entrance effects, conclude the fan power needed to overcome the pressure

Fair-minded trying to answer.

Q= 445 CFM

P= 14.7 PSI

Equivalent duct diameter - 7.44 - (inches)

Animosity Loss (inches water per 100 ft duct): 0.49

= 0.017 702 372 995 pound/clean

alpha b | Jan 22, 2009

Do I need a large air conditioning vent in my crawlspace?

Mar 08, 2007 by Brian B | Posted in Maintenance & Repairs

The fan which circulates heat from my furnace in the winter and cold air from my air conditioner in the summer resides in the basement of my ranch where it hurts. Large rectangular ducting goes up from the unit to a height of about 6 feet off the planking

Its unaccommodating to understand exactly WHY the HVAC company placed it there, however, do not unendingly seal it. Just try to temporarily block it and see what happens.
You could get hold of the installing HVAC company and ask for an explana

mobildik | Mar 08, 2007

4 Facts in 60 Seconds: Tjernlund Automatic Duct Booster Duct Fans

Tjernlund Products manufactures the Instinctual Duct Booster brand Duct Fans that help make hot or common cold rooms more comfortable. Use the Duct ...

Bestsellers Fantech Inline Rectangular Duct Fan

Click here for more details: www.amazon.com Fantech Inline Rectangular Duct Fan The compacted housing design of the FRD Series allows for ...

Polypipe Ventilation launches low profile rectangular Duct ...

In preparing consultation documents for the 2010 Approved Record F, the Worry for Communities and State Domination (CLG) has commissioned a cram into Ventilation and Indoor Air Excellence. The ponder indicates that many occupants are either turning ventilation appliances down or even off due to unconscionable babel. Therefore, in the proposed changes to Describe F it states that 'the [ventilation] system should not cast disgusting spread that could suppress the occupants from using it'.

Polypipe Ventilation has launched a new low good rectangular Duct Silencer for their Supertube 125 duct system. It provides a naked, price-operative solving to demote turmoil from dominant ventilation systems.

With the enterprise to higher efficacy homes, greater moment is being placed on reducing earnestness forfeiture from dwellings. To bring off this, many indigenous properties are now being built with middle ventilation systems, connecting a key fan module to a slew...