4.2. Configuration

Try these first

1. 1.

   What is an isentropic compression?

   Hint

   Think about how a bicycle pump works.

2. 2.

   Name one method to improve the COP in a refrigeration system.

   Hint

   It happens before the refrigerant enters the expansion valve.

3. 3.

   What happens to refrigerant vapor during isentropic compression?

   • It absorbs heat
   • It cools down
   • It is compressed and heated

   Hint

   Remember, this is the first step of the cycle.

4. 4.

   True or False: The ideal vapor compression cycle ignores real-world inefficiencies.

   • True
   • False

   Hint

   Think about its definition.

5. 5.

   Design a theoretical vapor compression refrigeration system for a small grocery store that needs to maintain low temperatures in freezers and moderate temperatures in a beverage cooler. Which cycle configuration would you recommend and why?

   Hint

   Consider both temperature ranges and product safety.

6. 6.

   Calculate the theoretical COP of an ideal refrigeration cycle with the following parameters: Heat removed at the evaporator = 5000 W, Work input to the compressor = 1200 W. Is this cycle practical? Why or why not?

   Hint

   Think about real-world conditions that affect COP.