Subject:- Refrigeration and Air Conditioning

Topic:- Miscellaneous

Difficulty:- Medium

Polystyrene, glass wool, glass fiber, etc. are suitable insulating materials.

The economic thickness of insulation is obtained after optimizing the cost of insulation and running cost of refrigeration system.

The desirable properties include

1) Low thermal conductivity permitting smaller insulation thickness

2) Cheap and easily available

3) Moisture resistant and chemically stable

4) High strength as well as ease of handling

5) Non-toxic and non-hazardous

6) Good surface amiability.