solve ut Problem 3. A tractor-trailer rig has a frontal area of A = 102 ft and drag coefficient Cp = 0.9. The ratio of rollingresistance to vehicle weight is CR = FR/W = (6 lbr)/(1000 lb;). The specific fuel consumption (defined as mass of fuelconsumed divided by power, or thrust, produced times the time period) for the diesel engine isSFC = m;/(PAt) 0.34 lb, and the drivetrain efficiency is na = 92%. The density of diesel fuel is p; = 6.9 lbm /gal.(a) Estimate the fuel economy, FE, for a rig traveling at a speed of U = 55 mph with a weight of W = 72,000 lbf.(b) For a fairing system that reduces the aerodynamic drag by 15%, estimate the improved fuel economy, FEfaired-(c) Calculate the annual fuel savings, FS, for a rig that travels 120, 000 miles per year. (d) Plot FE and FE faired versusspeed, U, assuming SfC and na are constant.

Data given- frontal area A = 102 ft2 Drag coefficient cD = 0.9 Tractor weight W= 72000 lbf Rolling…

Problem 3. A tractor-trailer rig has a frontal area of A = 102 ft² and drag coefficient Cp = 0.9. The ratio of rolling resistance to vehicle weight is CR = FR/W = (6 lbr)/(1000 lb;). The specific fuel consumption (defined as mass of fuel consumed divided by power, or thrust, produced times the time period) for the diesel engine is SFC = mj/(PAt) 0.34 lb, and the drivetrain efficiency is na = 92%. The density of diesel fuel is py = 6.9 lb, /gal. (a) Estimate the fuel economy, FE, for a rig traveling at a speed of U = 55 mph with a weight of W = 72,000 lb/. (b) For a fairing system that reduces the aerodynamic drag by 15%, estimate the improved fuel economy, FE faired- (c) Calculate the annual fuel savings, FS, for a rig that travels 120, 000 miles per year. (d) Plot FE and FE faired versus speed, U, assuming SFC and n4 are constant.

Problem 3. A tractor-trailer rig has a frontal area of A = 102 ft² and drag coefficient Cp = 0.9. The ratio of rolling resistance to vehicle weight is CR = FR/W = (6 lbr)/(1000 lb;). The specific fuel consumption (defined as mass of fuel consumed divided by power, or thrust, produced times the time period) for the diesel engine is SFC = mj/(PAt) 0.34 lb, and the drivetrain efficiency is na = 92%. The density of diesel fuel is py = 6.9 lb, /gal. (a) Estimate the fuel economy, FE, for a rig traveling at a speed of U = 55 mph with a weight of W = 72,000 lb/. (b) For a fairing system that reduces the aerodynamic drag by 15%, estimate the improved fuel economy, FE faired- (c) Calculate the annual fuel savings, FS, for a rig that travels 120, 000 miles per year. (d) Plot FE and FE faired versus speed, U, assuming SFC and n4 are constant.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Thermodynamic Relations

Thermodynamics is the division of physics that deals with the transfer of any kind of energy, whether it be heat, temperature, or work, from one object to another.

Question

solve ut

Problem 3. A tractor-trailer rig has a frontal area of A = 102 ft and drag coefficient Cp = 0.9. The ratio of rolling
resistance to vehicle weight is CR = FR/W = (6 lbr)/(1000 lb;). The specific fuel consumption (defined as mass of fuel
consumed divided by power, or thrust, produced times the time period) for the diesel engine is
SFC = m;/(PAt) 0.34 lb, and the drivetrain efficiency is na = 92%. The density of diesel fuel is p; = 6.9 lbm /gal.
(a) Estimate the fuel economy, FE, for a rig traveling at a speed of U = 55 mph with a weight of W = 72,000 lbf.
(b) For a fairing system that reduces the aerodynamic drag by 15%, estimate the improved fuel economy, FEfaired-
(c) Calculate the annual fuel savings, FS, for a rig that travels 120, 000 miles per year. (d) Plot FE and FE faired versus
speed, U, assuming SfC and na are constant.

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