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Air volume calculation for cabinet

1.Cabinet size
H= m
W= m
D= m
2.Location of cabinet
a) All around is open, with a base.
b) The first and last cabinets, three sides are empty, with a base.
c) Intermediate cabinet, two sides are empty, with a base.
d) Single cabinet, against wall, with a base.
e) The first and last cabinets, against walls, with a base.
f) Intermediate cabinet, against the wall, with a base.
g) All around is open, without a base.
h) The first and last cabinets, three sides are empty, without a base
i) Intermediate cabinet, two sides are empty, without a base.
j) Single cabinet, against wall, without base
k) The first and last cabinets, against walls, without a base.
l) Intermediate cabinet, against the wall, without a base.
Heat dissipation surface area
3.Installation location
indoor
Outdoor (with sunshine), when Max. ambient temperature outside cabinet
Radiation power per unit area W/㎡  Radiation heating area ㎡  Heat absorption coefficient of cabinet
Radiant heat W
4.Cabinet material

heat transfer coefficient W/㎡k
5.Temperature difference
Difference between max. allowable temperature in cabinet and max. ambient temperature outside cabinet.
Max. ambient temperature outside cabinet.
Max. allowable temperature in cabinet
Temperature difference K
6.Heating power of components in cabinet
The heating power of the components in the cabinet under the highest working conditions at the highest ambient temperature outside the cabinet.
The power of the devices is filled in the table below, then the approximate value of the heating power of the devices is obtained.
Frequency converter W  Power capacitor W  General device 220VAC 50HZ W
Transformer W  Iron core reactor W  General device 380VAC 50HZ W
Heating power of other devices W  Total heating power of components in cabinet W
7.Atmospheric pressure correction factor

Atmospheric pressure correction factor
8.Calculation
Required air volume CFM   m³/h
Because of the complexity of the actual working conditions, the calculation results must be verified by the users according to the actual application conditions. We declare that we are not liable for accuracy.
  

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