A heat pump operates between two heat reservoirs with temperatures of 270 and 300 K The heat pump itself has a temperature of 255 K during heat addition from the 270 K reservoir and a temperature of 350 K during heat rejection to the 330 K reservoir The COP of the actual unit is 340, and the heat transfer rate from the 270K reservoir is 2000 kJmin Determine the entropy production rate, in kJ min K for

a. the heat pump unit itself 

b. the low-temperature heat-transfer process 

c. the high-temperature heat-transfer process 

d. Which process has the largest irreversibility? 

Now, for the same temperatures and a heat-transfer rate of 2000 kJ/min, reduce the actual COP to 3.10. Again, determine the entropy production rate for 

e. the refrigeration unit itself 

f. the low-temperature heat-transfer process 

g. the high-temperature heat-transfer process 

h. Which process now has the largest irreversibility?