Homework 4

Problem 1

Consider a spark ignition engine with a compression ratio of 10, fed with a stoichiometric propane/air mixture. The temperature of the premixed propane/air in the inlet is 300 K. Compute the net work done by an ideal engine per kg of fuel. Also compute the efficiency on an LHV basis. What is the equilibrium NO at the end of the combustion step, and at the end of the expansion step?

Problem 2

Turns 3.3

Problem 3

Turns 3.5

Problem 4

Turns 4.7

Problem 5

Turns 4.12

Problem 6

Turns 4.16