QUESTION 1 40 points An outdoor air-to-air heat exchanger functioning between the outdoor air (310 K) is precooled with the indoor exhaust air at 300 K in a hot summer day. The thermal energy gain is 15 kW and two fans with a total power demand of 0.60 kW are used in the heat exchanger to move the air. Fans are operated by electric power. a- What is the unit exergy of thermal power of precooling the fresh and hot outdoor air (10 points) b- What is the exergy destruction? (15 points) c- ACO2 per hour of operation? (15 points)