6. Refrigerants – Classification, Nomenclature, Desirable Properties, and Selection

Try these first

1. 1.

   What is a natural refrigerant? Can you name one?

   Hint

   Think of substances used historically in ice making.

2. 2.

   What does the 'R' stand for in refrigerants like R-410A?

   Hint

   This is the first letter in the word.

3. 3.

   Which of the following is a natural refrigerant?

   • R-134a
   • CO2
   • R-410A

   Hint

   Think of naturally occurring substances.

4. 4.

   True or False: Synthetic refrigerants contribute to ozone depletion.

   • True
   • False

   Hint

   Recall the impacts of CFCs on the environment.

5. 5.

   Propose a refrigerant for a new refrigerating system designed for tropical climates. Justify your choice based on its properties and environmental impact.

   Hint

   Consider the environmental regulations and the unique conditions of tropical climates.

6. 6.

   Critically analyze the trade-offs between using natural refrigerants versus synthetic ones in modern HVAC systems.

   Hint

   Reflect on both the short-term efficiency and long-term environmental consequences.