What Are the Reasons for High Fuel Consumption When Using Air Conditioning?

[McJasper]

High fuel consumption when using air conditioning is caused by the operation of the compressor increasing fuel usage and is related to the vehicle's displacement and speed. The specific details are as follows: Compressor operation increases fuel consumption: Using air conditioning consumes more fuel mainly because the air conditioning compressor requires significant power to operate. The variation in fan speed has a relatively minor impact on power demand. Therefore, within a certain speed range or wind resistance, using air conditioning increases fuel consumption, while turning it off saves fuel. Related to vehicle displacement and speed: For a car that typically consumes 10 liters of fuel per 100 kilometers, using air conditioning can increase fuel consumption by approximately 2 liters. Tests show that higher temperatures and humidity levels lead to greater fuel consumption due to air conditioning. When the temperature exceeds 20 degrees Celsius, fuel consumption increases by about 10% to 20%, depending on temperature and humidity variations. In extreme conditions with temperatures around 40 degrees Celsius and high humidity, fuel consumption can increase by up to 30%.