At the start of the compression stroke of a diesel cycle, the air pressure and temperature are 100 kpa, 27 °c. this diesel engine has a compression ratio of 20 and a cutoff ratio of 1.5. answer the following questions using cold-air standard analysis assumptions. a)-what is the temperature of the air at the start of the combustion (heat addition) process? a. 415 °c b. 523 oc c. 721 °c d. 805 °c
b)-what is the maximum cycle temperature? a. 1292 °c b. 1391 °c c. 1491 °c d. 1550 °c. c)-what is the thermal efficiency of this engine? a. 0.664 b. 0.670 c. 0.676 d. 0.684 d)-how much work is produced during the combustion (heat addition) process? a. 85.5 kj/kg b. 114 kj/kg c. 143 kj/kg d. 289 kj/kg. e)-what is the rate at which heat must be added to this engine if it is to produce 1 mw of power? a. 1.40 mw b. 1.46 mw c. 1.47 mw d. 1.49 mw