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Generator Cooling Interference

The test generator was loaded by a 3000 watt load and operated without and with the GenTent installed to determine what effect the GenTent might have on the generator cooling. Thermocouples were located at alternator and engine air inlet and outlet ports. The thermocouples were connected to an Omega HH309 Data Logger Thermometer to record temperatures while the generator was operating. In addition, a Flir i7 thermal imaging camera was utilized to capture thermal images.

Thermocouples were located at the following ports:

  • T1. Engine cooling air port
  • T2. Alternator cooling air port at engine end
  • T3. Cooling air port on alternator at cover end
  • T4. Alternator cooling air underneath cover

The images below illustrate the location of each of the thermocouples.

Thermocouple location T1 (left) and T2 (right)
Thermocouple location T3 (left) and T4 (right)

The generator was operated while supplying power to a 3000 watt load both with and without the GenTent installed, for a period of at least thirty minutes, while temperatures were recorded and thermal images were obtained.

Dual heaters in operation

The 3000 watt load consisted of two oil-filled space heaters, shown in the thermal image above. Each heater was connected to a different generator receptacle to insure a balanced load for the generator, then set to its highest heat setting. Power consumed by the heaters was confirmed with a Watts Up? Pro power analyzer.

Heater 1 (left) and Heater 2 (right) wattage pull during operational test

Engine cooling air was slightly higher, but did vary ±3-4°F operating in either configuration.

Temperatures without GenTent (left) and with GenTent (right) during operational test

Likewise, little difference was seen in the thermal images:

Thermal Image without GenTent(left) and with GenTent(right) during operational test

As illustrated above, the GenTent was found to have no appreciable effect on the operating temperatures of the generator.