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

What is Electrolux?

By which device we can see electron?

Why is the answer B wrong?

Yes, I think B and C both are correct.

Option B is general for all the refrigerating system, but the essence of the question is about an Electrolux refrigerator. That's why we have to choose option C.

But in actual, the answer should be "Ammonia evaporates in presence of hydrogen".

Ammonia with hydrogen is used in evaporator. Hydrogen is used to increase the rate of reaction.

I think option D is right.

The correct answer is, Ammonia is absorbed in water.

In an Electrolux refrigerator, which is a type of absorption refrigerator, ammonia (NH3) is absorbed into water (H2O). This process occurs in the absorber section of the refrigerator.

Here's a brief overview of the cycle:

1. Ammonia gas is released from the generator section.
2. The ammonia gas is absorbed into water in the absorber section, forming an ammonia-water solution.
3. The solution is then pumped to the generator section, where heat is applied to drive the ammonia out of the solution.
4. The ammonia gas is then cooled and condensed, and the cycle repeats.

The other options are not accurate:
- Ammonia is not absorbed in hydrogen (H2).
- Ammonia does not evaporate in hydrogen.
- Hydrogen does not evaporate in ammonia.

Note that the Electrolux refrigerator uses a water-ammonia absorption cycle, which is different from the more common vapour-compression cycle used in most household refrigerators.