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 |
- 1 kW = 1.34 hp
- 1 hp = 0.746 kW
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