Running the AC in your car will use some gas, but not directly. Let’s take a complete look at how car AC works and how it impacts fuel consumption.
How Does Car AC Work?
The five parts listed below are responsible for all the heavy lifting done in a car’s AC system. Of course, the system will also utilize various hoses and refrigerant charging parts, but these five components are the most important parts of the system.
Condenser
The car’s AC condenser is typically located in front of the radiator, which gives it the nickname of the mini-radiator. When the compressor is pressurizing the refrigerant, the condenser will work to reduce the temperature and pressure of the hot gasses coming from the refrigerant.
Additionally, the condenser is responsible for moving the cooled liquid refrigerant to the receiver/dryer or accumulator.
Compressor
The compressor is the most essential component of a car AC system. The main functions of the compressor include the following:
- Moving air to the condenser.
- Pressurizing refrigerant to cool the air.
- Sensing temperature changes both inside and outside the car.
- Monitoring and controlling temperature output.
Accumulator Or Receiver/Dryer
The model of your vehicle will ultimately determine whether you have an accumulator or receiver/dryer. A receiver/dryer is found in vehicles that feature a thermal expansion valve. An accumulator, meanwhile, is featured in vehicles that have an orifice tube.
Your receiver/dryer is responsible for separating gas from liquid. The compressor can be ruined if any liquid enters. This is because a compressor is not designed for liquids, just gasses. This part will also take out moisture utilizing a desiccant. Desiccants can be compared to small, bead-filled packets one might find in the packing of new electronics.
Finally, there are also filters that work to protect the AC system from contaminants. The accumulator is there to monitor and control the amount of refrigerant that enters the evaporator. It will also store any excess refrigerant and filter debris, while also removing moisture.
Thermal Expansion Valve Or Orifice Tube
Cars with a thermal expansion valve will use a receiver/dryer, while a car that has an orifice tube will use an accumulator. Nevertheless, the thermal expansion valve or orifice tube should be found between the evaporator and condenser.
Together, they will monitor the amount of pressure and temperature of the AC system. The exact amount of refrigerant will be calculated to safely enter the evaporator.
Evaporator
The evaporator is also an important part of a car’s AC system. You can find this component behind the dashboard. It’s primary responsibility is to cool the air with the refrigerant before it is blown into the cabin of the car.
Does AC Use Gas In A Car?
Yes, air conditioning in a car does use gas, but not directly. And, most importantly, running the AC will not use much gas at all.
The car’s engine utilizes gas in order to power the alternator, which provides energy for the AC system’s compressor. Let’s take a further look at how running AC impacts fuel economy.
Engine Load
When the AC is turned on, the engine needs to work harder to power the compressor. The additional load on the engine comes with increased fuel consumption.
Fuel Efficiency
Some recent studies show AC use can reduce fuel efficiency by nearly 10%. However, the impact will vary based on factors like make and model, driving speed, and outdoor temperature.
Location
City driving calls for more frequent stops and starts, meaning the engine must work harder. The impact is relatively lower when driving on the highway.
Conclusion
There are a few ways to minimize your gas use when looking to cool off in the car. For instance, simply turn off the AC when it is unneeded. Try parking in a shaded area and make use of a sunshade to keep the car cool.
When you start your car, roll down the windows right away to let the hot air escape. Once the windows are rolled back up, this is the best time to turn the AC on. Regular auto service can also make a world of difference when it comes to performance.
Heath’s Auto Service In Scottsdale, AZ
At Heath’s Auto Service, we offer a comprehensive range of services and repairs to meet all your automotive needs. From routine maintenance like oil changes and tire rotations to more complex repairs involving brake systems, engine diagnostics, and transmission issues, our highly skilled technicians are equipped with the latest tools and technology to ensure your vehicle is serviced to the highest standards. Contact our team today!
