2.5. Demerits

Try these first

1. 1.

   What does COP stand for in refrigeration cycles?

   Hint

   Think about how we measure efficiency in refrigeration.

2. 2.

   Name one demerit of air refrigeration systems related to mechanical work.

   Hint

   Consider the energy needed to compress air.

3. 3.

   What does a low COP indicate about an air refrigeration system's efficiency?

   • It is very efficient
   • It requires a lot of energy for cooling
   • It has low mechanical work input

   Hint

   Reflect on the relationship between COP and energy consumption.

4. 4.

   True or False: Air refrigeration systems are typically quieter than vapor-compression systems.

   • True
   • False

   Hint

   Consider the impact of compressors on sound levels.

5. 5.

   Assess the true cost implications of using an air refrigeration system in a large industrial setup, considering energy prices and maintenance needs. Provide a detailed breakdown.

   Hint

   Evaluate each cost component based on industry standards.

6. 6.

   Design a brief proposal for improving noise levels in an aircraft utilizing air refrigeration. What modifications could be made?

   Hint

   Think about architectural options and materials that could absorb sound.