The amount of fuel and money saved per year.
Explanation of Solution
Given:
Frontal area of the car is
New frontal area is
Distance travelled per year is
Average speed is
Density of gasoline is
Price of gasoline is
Density of air is
Heating value of gasoline is
Overall efficiency of the engine is 30%.
Calculation:
From Table 15-2, the drag coefficient of a passenger car is
The drag force is,
Work done to overcome the drag is,
Energy required to overcome the drag is,
The amount of fuel required to supply the energy is,
The cost of fuel supplied per year is,
Calculate the reduction ratio.
Calculate the reduction in fuel amount.
Calculate the reduction in the cost.
Thus, the amount of fuel and the money saved per year is
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Chapter 15 Solutions
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