Consider an engine running on propane (C3Hg). Both the fuel and air enter the engine at 298 K and 100 kPa. The combustion can be assumed to be complete with an equivalence ratio of 0.8. The exhaust temperature and pressure are 1000 K and 100 kPa. Estimate the heat transfer from the engine per unit mass of propane if the work production of the engine is 20% of the LHV of the fuel.

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Draw a typical indicator diagram of pressure versus volume (p-v) to illustrate the cycle of a four stroke reciprocating internal combustion [RIC] engine when the piston is at TDC and BDC. Clearly label the name and the direction of each stroke on the p-v indicator diagram.