Does leaving the car running with the AC on consume fuel?

[DiSavannah]

Leaving the car running with the AC on does consume fuel. Below is relevant information about the car air conditioning system: 1. Introduction to car air conditioning: The car air conditioning system consists of a compressor, condenser, throttle element, evaporator, fan, and necessary control components, designed to regulate the temperature and humidity inside the car, providing a comfortable environment for the driver. 2. Working principle: When the compressor operates, it sucks in low-temperature and low-pressure gaseous refrigerant from the evaporator. After compression, the temperature and pressure of the refrigerant increase, and it is sent to the condenser. Inside the condenser, the high-temperature and high-pressure gaseous refrigerant transfers heat to the outside air passing through the condenser and liquefies, turning into a liquid. The liquid refrigerant flows through the throttle device, where its temperature and pressure decrease, and it enters the evaporator. Inside the evaporator, the low-temperature and low-pressure liquid refrigerant absorbs heat from the inside air passing through the evaporator and evaporates, turning into a gas. The gas is then sucked back into the compressor for the next cycle.