Heat Gain from Electrical Motors in Continuous Operation

Heat transferred from the electrical motor to the room for different locations of fan and motor.

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Electrical motors in air condition system contributes to the heat loads in air condition systems and have influence on the cooling equipment dimensions. Gained heat load from electrical motor and fans in different locations can be estimated from the table below:

Electrical Motor Shaft Output
(kW)
Full Load Electrical Motor Efficiency
- η -
%
Location of Fan and Motor
Motor and Fan in the Inlet Air Flow or in the Room
(kW)
Motor Outside the Air Flow or Outside the Room. The Fan in the Inlet Air Flow or in the Room
(kW)
Motor in the Room. The Fan in the Outlet Air Flow
(kW)
0.05 40 0.13 0.05 0.08
0.07 46 0.15 0.07 0.08
0.10 55 0.18 0.10 0.08
0.14 60 0.23 0.14 0.09
0.20 64 0.31 0.20 0.11
0.28 66 0.42 0.28 0.14
0.40 70 0.60 0.40 0.20
0.56 72 0.78 0.56 0.22
0.80 76 1.05 0.80 0.25
1.1 80 1.38 1.1 0.28
1.6 80 2.0 1.6 0.40
2.5 81 3.1 2.5 0.60
4.0 82 4.9 4.0 0.90
5.6 84 6.7 5.6 1.1
8.0 84 9.5 8.0 1.5
11.2 86 13.0 11.2 1.8
16 87 18.4 16 2.4
20 88 22.7 20 2.7
25 89 28.0 25 3.0
32 89 36.0 32 4.0
40 89 45.0 40 5.0
50 90 56.0 50 6.0
63 90 70.0 63 7.0
80 90 89.0 80 9.0
100 91 110.0 100 10.0

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Related Topics

  • Air Condition Systems Air Condition systems - heating, cooling and dehumidification of indoor air for thermal comfort

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