1. 2. An ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95 kPa and 20C. If the maximum temperature in the cycle is not to exceed 2200 K, determine (a) the thermal efficiency and (b) the mean effective pressure. Assume constant specific heats for air at room temperature. [(a) 63.5 percent, (b) 933 kPa] An ideal diesel cycle has a compression ratio of 16 to 1. The maximum cycle temperature is 1700 C and the minimum cycle temperature is 15 C. Calculate: the specific heat transfer to the cycle the specific work of the cycle i. ii. iii. the thermal efficiency of the cycle