5/20/2018 (054 057) Ceiling Fan Calculations

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Seq. Room Number Room Area CMH CMSVelocity of fan

m/s

Fan

Diameter

m

Fan AreaFan Used

Number

Flow rate from

each fan

m^3/s

Total Flow

Rate

m^3/s

Required

Number of

Fan

1 1 34.56 5875 1.632 1.05 1.5 1.76625 2 1.8545625 3.709125 2

2 2 35 5950 1.653 1.05 1.5 1.76625 1 1.8545625 1.8545625 1

Room # 2

2. Fan Diameter = 1.5 m

3.Velocity of Fan = 1.05 m/s

4. The area of Room # 2 = 35 m^2

5. The Wall length of Room # 2 = 3 m

The Design Step : -

1. The area of Room # 2 = 35 m^2

2. The demand flow rate for Room # 2 = 34 *35*2 = 5950 m^3/hr =5950/3600 = 1.653 m^3/s

3. Q = A * VA: Fan Area (m 2)

V: Fan Velocity (m/s)

Q: Flow rate from fan (m^3/s)

Q = (3.14/4) * (1.5)^2

Q = 1.85 m^3/s

therefore, one number of ceiling fan is estimated to cover the required demand of flow rate for Room # 2.

Ceiling Fan Calculation

The Design Criteria:-

1. 34 CMH/Person/m^2.

(054-057