4.4. Limitations

Try these first

1. 1.

   What is one limitation of the ammonia-water system?

   Hint

   Think about what happens to water in vapor form.

2. 2.

   Can the water-lithium bromide system achieve freezing temperatures?

   Hint

   Consider what refrigerant is used.

3. 3.

   What is a major limitation of the ammonia-water absorption refrigeration system?

   • It can operate at freezing temperatures.
   • It suffers from water carryover.
   • It does not need purification.

   Hint

   Consider the interaction between the water and ammonia.

4. 4.

   True or False: Lithium bromide crystallization can occur if the concentration is too low.

   • True
   • False

   Hint

   Think about what causes crystallization to happen.

5. 5.

   A water-ammonia system needs to be design-optimized for a region where both hot and cold demands exist. Discuss the limitations that need to be addressed for efficient function in varying temperatures.

   Hint

   Think about how temperature variations impact system design requirements.

6. 6.

   You are tasked with developing a new absorption system using lithium bromide. Consider ways to mitigate crystallization issues while maximizing efficiency.

   Hint

   Focus on managing temperature and concentration to prevent crystallization.