Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

The correct answer is: all of these.

Natural convection air-cooled condensers are commonly used in various applications, including:

1. Domestic refrigerators: They are used to condense the refrigerant vapour into a liquid, releasing heat to the surrounding air.
2. Water coolers: Also known as evaporative coolers, they use natural convection to cool water, which is then used to cool the surrounding air.
3. Room air conditioners: Some room air conditioners, especially window units, use natural convection air-cooled condensers to reject heat to the outside air.

Natural convection air-cooled condensers are a simple and cost-effective way to reject heat, as they don't require fans or pumps to circulate air or water. They rely on the natural buoyancy of heated air to drive the convective flow.

These condensers are widely used due to their:
- Low cost
- Low maintenance
- Quiet operation
- Simple design

However, they may not be suitable for high-heat load applications or situations where airflow is restricted.

Yes, I agree @SujayPramanik.

D is the right Answer.

Here A) is the correct answer.

Because forced convection air-cooled condenser is used in the water cooler, room air conditioner but in the domestic refrigerator only natural convection air-cooled condenser is used.

Yes, You are correct @JineshVc.

The answer is D.

Air cooled condensers are used in small units like household refrigerators, deep freezers, water coolers, window air conditioners, split air-conditioners, small packaged air-conditioners etc.

May be used with water coolers also.