How much fuel is consumed when sleeping in a car with the air conditioning on for an hour?

1 Answers
SanAmy
07/29/25 5:52pm
Sleeping in a car with the air conditioning on for an hour consumes approximately 2.2406 liters of fuel. To calculate the fuel consumption caused by the air conditioning, it is essential to understand the compressor's power and the fuel consumption rate per unit of time. When calculating only the air conditioning's fuel consumption, a typical car compressor has a power ranging from 2.5 kW to 4 kW. Combined with the engine's idle fuel consumption rate—assumed to be 400 grams per kilowatt-hour—here are some methods to reduce fuel consumption: 1. Check the air conditioning system in summer: Air conditioning malfunctions are a significant cause of high fuel consumption. If the cooling effect is poor, it will require higher fan speeds and lower temperatures to achieve a comfortable cooling effect. 2. Frequent hard braking: Frequent hard braking is a primary reason for persistently high fuel consumption in cars. While ensuring safe driving, make full use of the vehicle's inertia. 3. Avoid running the air conditioning too aggressively in small-displacement vehicles: For vehicles exposed to the sun, avoid turning on the air conditioning immediately after entering. First, open the windows and set the fan to a higher speed without turning on the air conditioning to expel the hot air inside. Once the vehicle has cooled moderately, then turn on the air conditioning.
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