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How much more fuel does using air conditioning consume?

1 Answers

DelBeau

07/29/25 6:17pm

Using air conditioning increases fuel consumption by approximately 1-2 liters. Below are relevant explanations: 1. Principle of automotive air conditioning refrigeration: The refrigeration principle of car air conditioning involves compressing refrigerant into liquid state then vaporizing it to absorb heat from the air. This process is powered by the air conditioning compressor, which is driven by the engine belt. Therefore, the air conditioning system inevitably consumes part of the engine's power, meaning car air conditioning operation does increase fuel consumption. 2. Heating system: The heating system utilizes waste heat converted from engine operation, representing energy recycling that fundamentally shouldn't increase fuel consumption. However, if you turn on the heater immediately after starting the car, the engine idle speed will increase due to low temperature to accelerate water temperature rise, which will definitely increase fuel consumption.

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