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  2. Car Air Conditioning: Energy Usage & Benefits - Physics Forums

    www.physicsforums.com/threads/car-air-conditioning-energy-usage-benefits.127552

    In most cars, the air conditioning system is automatically turned on whenever the windshield defroster is selected. The reason is simple: the A/C cools the air, but also dries it, and that helps get rid of interior moisture. In most cars, the A/C light will stay on if you switch from defrost to any other mode.

  3. Thermal Equilibrium: Why Does Car Get Hotter Inside? - Physics...

    www.physicsforums.com/threads/thermal-equilibrium-why-does-car-get-hotter...

    Thermal equilibrium plays a crucial role in the efficiency of a car's air conditioning system. If the car's interior is significantly hotter than the desired temperature, the air conditioning will have to work harder to cool it down, resulting in decreased efficiency and increased fuel consumption. This is why it is recommended to park a car in ...

  4. How should I switch an air conditioner off? - Physics Forums

    www.physicsforums.com/threads/how-should-i-switch-an-air-conditioner-off.609110

    1,952. The best way to stress your air conditioner compressor motor is to shut it off and restart right away. If you do that enough times the motor overheats and blows. The motoer would be trying to restart against high pressure fluid that hasn't had time to flow through the capillary tube and lower the pressure.

  5. What Are 3 Driver-Operated Controls That Cause Acceleration in an...

    www.physicsforums.com/threads/what-are-3-driver-operated-controls-that-cause...

    However, those are not the driver-operated controls that cause acceleration in an automobile. The three controls are the accelerator pedal, the brake pedal, and the steering wheel. These controls allow the driver to control the speed, deceleration, and direction of the vehicle, respectively, which ultimately affect its acceleration.

  6. Can Cooling a Room With a Car Radiator Work? - Physics Forums

    www.physicsforums.com/threads/can-cooling-a-room-with-a-car-radiator-work.596145

    Technically, yes, a car radiator can be used to cool a room. However, it may not be the most efficient or practical method. 2. How does cooling a room with a car radiator work? The concept behind using a car radiator to cool a room is similar to how it works in a car. The radiator dissipates heat from the coolant using a fan, and the heat is ...

  7. What Is the Coefficient of Performance of a Carnot Air...

    www.physicsforums.com/threads/what-is-the-coefficient-of-performance-of-a...

    One of the main advantages of a Carnot air conditioner is its high efficiency. Due to its use of the Carnot cycle, it is able to convert heat into work at a maximum efficiency, making it more energy-efficient than other air conditioning systems. Additionally, Carnot air conditioners do not use any harmful chemicals, making them more ...

  8. How Can We Design a Compressed Air Car for 300 km Travel? -...

    www.physicsforums.com/threads/how-can-we-design-a-compressed-air-car-for-300...

    E = (F friction + F drag) × s = (approx.) 120 MJ. this number seems fine to me, since an ordinary small car burns 6 liters of fuel per 100 km, every liter has 35 MJ of energy, assume 20% efficiency: 3 (300 km) × 6 (liters per 100 km) × 35 (MJ per liter) × 0.2 (eff) = 126 MJ. storing 120 MJ in an air tank would require quite a pressure (let ...

  9. Danger of spending time inside a running, not moving car

    www.physicsforums.com/threads/danger-of-spending-time-inside-a-running-not...

    a) Recirculating air mode: the air that is already inside your vehicle's cabin is continuously used. This mode seems to prevent the exhaust fumes and CO to enter the cabin. However, if we stay in the car for hours, the air we breath is depleted of oxygen, rich in CO2 and moisture and suffocation becomes a risk.

  10. What is the Velocity of Air Entering the Air Filter? - Physics...

    www.physicsforums.com/threads/what-is-the-velocity-of-air-entering-the-air...

    Thanks for your answer. And yes, I'm talking about the engine air filter (not the air-conditioning filter). By the way, I'm counting the amount of air velocity/volume just before the air pass through the MAF sensor. In other word, the air flow into the filter. ***sorry for my bad language if you don't understand it*** The simplest way like this :

  11. How much does air expand with heat - Physics Forums

    www.physicsforums.com/threads/how-much-does-air-expand-with-heat.267530

    The amount of expansion that occurs in air with an increase in temperature is determined by the ideal gas law, which states that the volume of a gas is directly proportional to its temperature. For every 1 degree Celsius increase in temperature, air will expand by approximately 1/273 of its original volume. 3.