the hybrid vehicle engine produces an average of 25 kw of power output and has a

Question

the hybrid vehicle engine produces an average of 25 kw of power output and has an efficiency of 65%. Assume it runs 200 hours and 12000 miles a year, the average speed is 60 mi/h. If the heating value of gasoline is 40500 kJ/kg. A- How much gasoline consumed in gallons during a year? B- What's the mileage per gallon (1 gallon = 6 lb)? Is it a reasonable number? C- How much does it save in gasoline if compared to a 30% efficient regular car engine with the same power output running the same hours and miles a years?

Explanation / Answer

time = 200 + 12000/60 = 400 hrs x * 40500 = 25 *0.65*400*3600 => x = 577.78 kg

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