Answer Happy

(50 points) An ideal Otto cycle has a compression ratio of 7. At the beginning of the compression process (State a), air is at 300 K and 1300 kJ/kg of heat is added to air during the constant-volume heat-addition process (Process b - c). The pressure at the end of the compression process (State b) is 2000 kPa and the temperature at the beginning of the heat rejection process (State d) is 1100 K. Assume the compression and expansion processes to be isentropic and the heat addition and heat rejection processes to be performed at constant volume. Use cold air standard assumptions to solve this problem. You won't receive any credit if you don't use the cold air standard assumptions to solve this problem. a) b) d) e) kJ kg-K' Given: C, 0.718; = c) What are the maximum temperature and maximum pressure in the cycle? (15 points) Cp: = 1.005; k = 1.4. kj kg.K' Draw a P-v diagram for the given cycle. (5 points) What is the temperature at the end of the compression process (State b)? (10 points) What is out m £? (10 points) What is the thermal efficiency of the Otto cycle? (10 points)