A four-stroke IC engine with 4 cylinders operates at 3000 rpm in an air standard Otto cycle. Data for a single cylinder are given as follows. The compression ratio is 8.7. Prior to the isentropic compression process, air is at the atmospheric conditions of 100 kPa, 20oC and 660 cm3. The temperature at the end of the isentropic expansion process is 810 K. Assume the heat addition to take place from a reservoir at 1827oC and heat rejection to the atmosphere. Using the PG model,
(a) Perform a complete energy inventory and draw the energy flow diagram on a rate (kW) basis. Determine
(b) The overall energetic efficiency and
(c) The thermal (energetic) efficiency (ηth) of the cycle.