Air Conditioning System Concepts

The video explains how sweating cools the body through latent heat of vaporization, similar to how air conditioners work. It details the components of an air conditioner, including the compressor, condenser, evaporator, and expansion valve, and their roles in the refrigerant cycle. The video also covers the differences between piston and scroll compressors, the importance of temperature control, and how water condensation is managed in the indoor unit.

What is the role of Latent Heat of Vaporization in cooling?

• It increases the temperature of the surroundings.

• It absorbs heat from the surroundings during evaporation.

• It decreases the pressure of the surroundings.

• It condenses the refrigerant into liquid.

How is a compressor in an air conditioner similar to a heart?

• It cools down the refrigerant.

• It filters impurities from the refrigerant.

• It stores excess refrigerant.

• It pumps refrigerant throughout the system.

What happens to the refrigerant in the evaporator?

• It is compressed into a liquid.

• It absorbs heat and evaporates into a gas.

• It releases heat and condenses into a liquid.

• It is stored for later use.

Why are scroll compressors preferred over piston compressors?

• They are more expensive.

• They are larger and more powerful.

• They are more efficient and quieter.

• They require more maintenance.

What is the function of the condenser in an air conditioner?

• To compress the refrigerant.

• To heat the refrigerant.

• To cool and condense the refrigerant into a liquid.

• To evaporate the refrigerant.

How does the expansion valve affect the refrigerant?

• It filters impurities from the refrigerant.

• It converts the refrigerant into a solid.

• It increases the pressure and temperature.

• It decreases the pressure and temperature.

What type of fan is used in wall-mounted air conditioners?

• Axial fan

• Centrifugal fan

• Impeller fan

• Propeller fan

Why do cold surfaces become covered with water droplets?

• Because the gas loses heat and condenses into liquid.

• Because the surface absorbs moisture from the air.

• Because the surface is porous and absorbs water.

• Because the surface releases heat into the air.

What happens to the water collected from the cold refrigerant pipes?

• It is evaporated back into the air.

• It is stored in a drain pan and discharged.

• It is used to cool the refrigerant further.

• It is recycled back into the system.

How does an air conditioner prevent over-cooling?

• By increasing the temperature of the refrigerant.

• By reducing the amount of refrigerant in the evaporator.

• By increasing the speed of the fans.

• By shutting down the compressor.