An air conditioner using R-410a is used in cooling mode. The high pressure is 3000 kPa and the low pressure is 800 kPa. It cools a house at 20◦C with a rate of 12 kW, and the outside ambient is at 35◦C. Find the destruction of exergy in four places: 

(1) Inside the refrigerator, 

(2) In the high-T heat exchanger, 

(3) In the low-T heat exchanger, and 

(4) In the house walls/windows, and so on that separate the inside from the outside of the house.