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Electrical Motors and Heat Loss
Heat gain from electrical motors to the surroundings
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Heat loss from electric motors during operation can be indicated to
| Size of Motor (kW) | Heat Loss (Watts/kW) |
| 0 - 2 | 250 |
| 3 - 15 | 150 |
| 15 - 150 | 100 |
| 150 - | 80 |
- 1 kW = 1.34 hp
- 1 hp = 0.746 k W
Alternative - with Imperial Units
| Nameplate Rating | Motor Efficiency Average | Heat Loss to Room Air (Btu per Hr per Rated Hp) | ||
| (Hp) | Motor in Room Driven Device inside Room | Motor in Room Driven Devise Outside Room | Motor Outside Room Driven Device inside Room | |
| 1/8 to 1/2 | 0.60 | 4250 | 1700 | 2550 |
| 1/2 to 3 | 0.69 | 3650 | 1100 | 2550 |
| 3 to 20 | 0.85 | 2950 | 400 | 2550 |
- 1 Btu/h = 0.293 W
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Related Topics
- Electrical - Amps and electrical wiring, AWG - wire gauge, electrical formulas, motors and units
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Related Documents
- Electrical Motor Efficiency - Calculating electric motor efficiency
- Heat Gain from Electrical Motors in Continuous Operation - Heat transferred from electrical motors to rooms with different locations of fan and motor
- Power Factor for a Three-Phase Electrical Motor - Power Factor definition for a three-phase electrical motor
