23. The Second Law of Thermodynamics
The Otto Cycle
23. The Second Law of Thermodynamics The Otto Cycle
3PRACTICE PROBLEM
Otto cycle engines can be modeled as Carnot engines for simplicity. An otto cycle engine operates between TH = 1750℃ and a surrounding temperature of 25℃ and attains 40% of the Carnot efficiency. Taking the heat of combustion of the fuel to be 44 MJ/Kg, determine the mass of fuel consumed by an engine in speeding up a 2750kg truck initially at rest to a speed of 60 mph.
Otto cycle engines can be modeled as Carnot engines for simplicity. An otto cycle engine operates between TH = 1750℃ and a surrounding temperature of 25℃ and attains 40% of the Carnot efficiency. Taking the heat of combustion of the fuel to be 44 MJ/Kg, determine the mass of fuel consumed by an engine in speeding up a 2750kg truck initially at rest to a speed of 60 mph.