4.3. Benefits

Try these first

1. 1.

   What does COP stand for in refrigeration?

   Hint

   It's a measure of efficiency.

2. 2.

   What is subcooled refrigerant?

   Hint

   Think of it as the liquid state before expansion.

3. 3.

   What effect does subcooling have on COP?

   • Increases
   • Decreases
   • No effect

   Hint

   Think about how cooling impacts efficiency.

4. 4.

   Is superheating a process that can lead to reduced compressor damage?

   • True
   • False

   Hint

   Consider its role before the compression stage.

5. 5.

   Design a basic multi-stage VCR system scheme outlining potential refrigerant choices for various stages and explain why they are suitable.

   Hint

   Think about specific refrigerants and where they perform best.

6. 6.

   Evaluate the environmental impact of using HCFC refrigerants versus HFC refrigerants in cascade systems.

   Hint

   Compare their global warming potential and impact on ozone layer.