Katerina Swanson
An Auxiliary Power Unit (APU) is located onboard an aircraft to provide electrical power on the ground, ensuring turnaround operations when the main engines cannot be used. The APU can also be used in-flight or during taxiing in specific situations, such as engine failure or single-engine taxi, to complement the energy supplied by the engines or batteries. The fuel consumption of an APU varies depending on the aircraft type, power generated, and cooling load. For example, the Boeing 737 APU fuel consumption is 110 kg/hour, while the A320 APU fuel burn is 126 kg/hour. On the other hand, truckers have reported APU fuel consumption ranging from 0.1 to 1.1 gallons per hour, depending on the vehicle and usage conditions.
| Characteristics | Values |
|---|---|
| APU fuel consumption for Boeing 737 | 110 kg/hour |
| APU fuel consumption for A320 | 126 kg/hour |
| APU fuel consumption for 737 300 and 500 | 80 kg/hour |
| APU fuel consumption for 737-700 | 80-120 kg/hour |
| APU fuel consumption for A340 | 500-800 kg/hour |
| APU fuel consumption for B767 | 200 kg/hour |
| APU fuel consumption for 727-737 | 250-300 kg/hour |
| APU fuel consumption for trucks | 0.1-1.1 gallons per hour |
| Hourly cost of APU usage | $100 to $400 |
| Ground Power Units (GPU) fuel consumption | <20 kg of fuel per hour |
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What You'll Learn
APU fuel consumption for trucks: 0.6-1.1 gallons/hour
Fuel consumption for an APU varies depending on the power and cooling load. For trucks, APU fuel consumption ranges from 0.6 gallons to 1.1 gallons per hour.
Some truckers have reported that their trucks use 0.5 gallons per hour when idling, while others have stated that their trucks consume between 0.1 and 0.32 gallons per hour. The variance in APU fuel consumption is influenced by factors such as power requirements and cooling load. For instance, a tripack on a truck can average around 0.15 gallons per hour, but this can increase to 0.32 gallons per hour when the AC is used at maximum capacity in hot weather.
Curtis, a 12-year-over-the-road driver, reported that his Thermo King Tri-Pac APU burns an average of 0.6 gallons per hour, resulting in significant fuel savings compared to idling his truck to maintain temperature control in the cab. He noted that APUs have smaller engines that are quieter than a typical truck engine, making them advantageous in crowded truck stops where noise reduction is important for rest and sleep.
The fuel consumption range of 0.6 gallons to 1.1 gallons per hour for APUs in trucks can lead to substantial savings for small business owners and over-the-road drivers. By reducing fuel consumption during rest periods and eliminating the need for idling, APUs help keep costs low, enhance fuel efficiency, and contribute to a more profitable business.
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APU fuel consumption for planes: 80-126 kg/hour
An Auxiliary Power Unit (APU) is located onboard an aircraft to provide electrical power on the ground, ensuring turnaround operations when the main engines cannot be used. It can also be used in-flight or during taxi in specific situations, such as engine failure or single-engine taxi, to complement the energy supplied by the engines or batteries.
APU fuel consumption varies depending on the aircraft type and usage conditions. For example, the Boeing 737 APU consumes 110 kg/hour, while the A320 APU consumes 126 kg/hour. On the other hand, the 737-300 and 500 series APUs use around 80 kg per hour, and the -700 series uses 80 to 120 kg per hour.
In some cases, the APU is used only for electrical power, consuming around 400-450 kg/hour. When used with an air conditioning pack, the consumption increases to 550-600 kg/hour.
To reduce fuel costs associated with APU usage, airlines can implement specific measures. One option is to limit APU usage by utilizing Ground Power Units (GPUs), which consume less than 20 kg of fuel per hour. Monitoring APU usage during aircraft maintenance and tracking unreasonable usage can also help optimize fuel efficiency.
By correctly monitoring and managing APU usage, airlines can make significant fuel savings and reduce associated costs.
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APU fuel consumption for ground power units: <20 kg/hour
An Auxiliary Power Unit (APU) is located onboard an aircraft to provide electrical power on the ground to ensure turnaround operations when the main engines cannot be used. APUs can also be used in-flight or during taxi in specific situations, such as engine failure or single-engine taxi, to complement the energy supplied by the engines or batteries.
The fuel consumption of an APU depends on the power generated and required. For example, an APU used only for electrical power will generally use 400-450 kg/hour. If an APU is used for electrical power and one air conditioning pack, it will use 550-600 kg/hour.
However, the airport's Ground Power Units (GPU) use significantly less fuel per hour than an APU. GPUs use less than 20 kg of fuel per hour. Therefore, limiting APU usage and opting for a GPU when possible can help reduce fuel costs.
In the case of trucks, the fuel consumption for an APU ranges from 0.1 to 1.1 gallons per hour, depending on power and cooling load.
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APU fuel savings: up to 2500 gallons
The fuel consumption of an Auxiliary Power Unit (APU) varies depending on the type of aircraft or vehicle, the power generated, and the cooling load.
For aircraft, the APU fuel burn rate can be quite high. For example, the A320 APU fuel burn is 126 kg/hour, while the Boeing 737 APU fuel consumption is 110 kg/hour. The A340-300 and A340-600 aircraft can use up to 500-800 kg/hour of fuel with the APU, depending on whether external air conditioning is required.
On the other hand, for trucks, the fuel consumption of an APU is typically much lower. Some truckers have reported APU fuel consumption rates ranging from 0.1 to 0.6 gallons per hour, depending on the model and the cooling load. For example, the Thermo King Tri-Pac APU has been reported to burn around 0.6 gallons per hour, while the Dynasys APU is estimated to burn less than 0.5 gallons per hour.
By using an APU, significant fuel savings can be achieved, especially when compared to idling a truck's engine or using ground power units (GPUs) for aircraft. For instance, an idling truck engine can use 0.8 to 1 gallon of fuel per hour, whereas an APU typically uses much less. Similarly, GPUs at airports use less than 20 kg of fuel per hour, making them a more fuel-efficient option than APUs when available.
Overall, the use of an APU can result in substantial fuel savings. For example, Thermo King estimates that their TriPac Evolutions APU can reduce fuel consumption by up to 2,500 gallons. This highlights the potential for significant cost savings and environmental benefits through the reduced fuel usage associated with APUs.
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APU fuel cost: $100-$400/hour
The hourly cost of running an Auxiliary Power Unit (APU) can range from USD 100 to USD 400. The APU is located onboard an aircraft to provide electrical power on the ground to ensure turnaround operations, and can also be used in flight or during taxi in specific situations.
The APU's fuel consumption is influenced by factors such as aircraft type, power generated, and bleed air usage. For example, the Boeing 737 APU consumes 110 kg/hour, while the A320 APU consumes 126 kg/hour. The A340 APU requires around 200 kg/hour, and the B767 APU consumes roughly 200 kg/hour.
In some cases, the APU is used only for electrical power, which can result in a consumption of 400-450 kg/hour. If the APU is utilised for electrical power and a single air conditioning pack, the consumption increases to 550-600 kg/hour.
It's important to note that Ground Power Units (GPUs) are more fuel-efficient, consuming less than 20 kg of fuel per hour. By utilising GPUs when possible and implementing effective APU policies, airlines can significantly reduce their fuel costs.
For trucks, the fuel consumption of an APU can vary between 0.1 and 1.1 gallons per hour, depending on factors such as power requirements and cooling load. Some truckers have reported fuel consumption rates of 0.6 gallons per hour, while others have observed rates closer to 1 gallon per hour.
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Frequently asked questions
The fuel consumption of an APU depends on various factors, such as the aircraft type, power generated, and cooling load. For example, the Boeing 737 APU consumes 110 kg/hour, while the A320 APU consumes 126 kg/hour. On the ground, an APU can consume anywhere between 80 to 550 kg of fuel per hour.
The APU consumes less fuel than jet engines because it doesn't have to contribute thrust to the airframe. Ground Power Units (GPUs) are another alternative, consuming less than 20 kg of fuel per hour.
The fuel consumption of a truck's APU ranges from 0.1 to 1.1 gallons per hour, depending on the model and cooling load.
The hourly cost of running an APU can range from USD 100 to USD 400.
You can track your APU's fuel consumption by using a comprehensive fuel management system that collects data on APU usage based on aircraft type, station, weather, and cargo content.
