Heat Gain from Electrical Motors in Continuous Operation

Heat transferred from electrical motors to rooms with different locations of fan and motor

Electrical motors in air condition system contributes to the heat loads in air condition systems and have influence on the cooling equipment dimensions.

heat gain fans

Gained heat load from electrical motor and fans in different locations can be estimated from the table below:

Shaft Output
(kW)
Full Load Electrical Motor Efficiency
- η -
(
%)
Electrical Motor Input
(kW)
Location of Fan and Motor
1
Motor and Fan in the Inlet Air Flow or in the Room
(kW)
2
Motor Outside the Air Flow or Outside the Room. The Fan in the Inlet Air Flow or in the Room
(kW)
3
Motor in the Room. The Fan in the Outlet Air Flow
(kW)
0.05 40 0.13 0.13 0.05 0.08
0.07 46 0.15 0.15 0.07 0.08
0.10 55 0.18 0.18 0.10 0.08
0.14 60 0.23 0.23 0.14 0.09
0.20 64 0.31 0.31 0.20 0.11
0.28 66 0.42 0.42 0.28 0.14
0.40 70 0.60 0.60 0.40 0.20
0.56 72 0.78 0.78 0.56 0.22
0.80 76 1.05 1.05 0.80 0.25
1.1 80 1.38 1.38 1.1 0.28
1.6 80 2.0 2.0 1.6 0.40
2.5 81 3.1 3.1 2.5 0.60
4.0 82 4.9 4.9 4.0 0.90
5.6 84 6.7 6.7 5.6 1.1
8.0 84 9.5 9.5 8.0 1.5
11.2 86 13.0 13.0 11.2 1.8
16 87 18.4 18.4 16 2.4
20 88 22.7 22.7 20 2.7
25 89 28.0 28.0 25 3.0
32 89 36.0 36.0 32 4.0
40 89 45.0 45.0 40 5.0
50 90 56.0 56.0 50 6.0
63 90 70.0 70.0 63 7.0
80 90 89.0 89.0 80 9.0
100 91 110 110 100 10.0
  • 1 kW = 1,000 Watts = 3,412 Btu/h = 737.6 / 550 British hp = 1.341 British hp = 103/9.80665 kgf m/s = 737.6 ft lbf/s = 103/(9.80665 75) metric hp

Related Topics

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

Related Documents

Tag Search

  • en: heat gain electrical motors emission
  • es: la ganancia de calor motores eléctricos de emisiones
  • de: Wärmegewinn Elektromotoren Emissions

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro. Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close