Why Does Car Air Conditioning Consume More Fuel?

[StClaire]

Here are the reasons why using car air conditioning increases fuel consumption: 1. Compressor operation increases fuel consumption: The main reason for higher fuel consumption when using air conditioning is that the air conditioning compressor requires significant power to operate. The variation in fan speed does not greatly affect power demand. Therefore, within a certain speed range or wind resistance, using air conditioning consumes more fuel, while not using it saves fuel. 2. Related to car displacement and speed: For a car that normally consumes 10 liters of fuel per 100 kilometers, using air conditioning can increase fuel consumption by about 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 can increase by approximately 10% to 20%, depending on temperature and humidity differences. In extreme conditions with temperatures around 40 degrees Celsius and high humidity, fuel consumption can increase by up to about 30%.