Energy Conservation - AP Environmental Science
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What does "CAFE" stand for when referring to the CAFE Standard?
What does "CAFE" stand for when referring to the CAFE Standard?
CAFE is a standard enacted by U.S. Congress in 1975 with the objective to improve fuel economy for all vehicles produced for sale in the U.S. The acronym stands for Corporate Average Fuel Economy, because it applies to automotive corporations marketing cars in the U.S. and the objective was to improve average fuel economy.
CAFE is a standard enacted by U.S. Congress in 1975 with the objective to improve fuel economy for all vehicles produced for sale in the U.S. The acronym stands for Corporate Average Fuel Economy, because it applies to automotive corporations marketing cars in the U.S. and the objective was to improve average fuel economy.
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How exactly does CAFE improve the average fuel economy of vehicles?
How exactly does CAFE improve the average fuel economy of vehicles?
CAFE is an ever-increasing average fuel economy standard that automobile manufacturers must satisfy in order to market their fleet of vehicles in the United States. This regulation is targeted toward new vehicles.
Example: Current CAFE standards mandate a manufacturer's fleet average 
miles per gallon in fuel economy. If a car company produces three cars, rated at 35, 30 and 20 mpg, average fuel economy would be determined as:
Based upon their average fleet fuel economy, this car company could now sell their vehicles in the United States for the 2015 model year.
CAFE is an ever-increasing average fuel economy standard that automobile manufacturers must satisfy in order to market their fleet of vehicles in the United States. This regulation is targeted toward new vehicles.
Example: Current CAFE standards mandate a manufacturer's fleet average
Based upon their average fleet fuel economy, this car company could now sell their vehicles in the United States for the 2015 model year.
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In recent years, many automotive companies have gotten away with marketing large SUVs with very poor fuel economy. How is this legally possible?
In recent years, many automotive companies have gotten away with marketing large SUVs with very poor fuel economy. How is this legally possible?
The fuel economy standards established by CAFE are more strict and demand more fuel efficiency for passenger cars than for light trucks. Passenger cars are defined as having a Gross Vehicle Weight Rating (GVWR) of less than 8500 lbs, while a light truck is a vehicle with a GVWR greater than 8500 lbs. The light truck classification was initially for utility and commercial vehicles, but since many SUVs exceed the GVWR rating for a passenger car, they are regulated separately from the fleet of passenger cars and are not subject to stringent fuel economy standards.
The fuel economy standards established by CAFE are more strict and demand more fuel efficiency for passenger cars than for light trucks. Passenger cars are defined as having a Gross Vehicle Weight Rating (GVWR) of less than 8500 lbs, while a light truck is a vehicle with a GVWR greater than 8500 lbs. The light truck classification was initially for utility and commercial vehicles, but since many SUVs exceed the GVWR rating for a passenger car, they are regulated separately from the fleet of passenger cars and are not subject to stringent fuel economy standards.
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Car Company A is in deep trouble with the U.S. Department of Transportation (DOT). It has been discovered that Company A's 2015 all-passenger car fleet has a mean fuel economy that falls short of the federal fuel economy requirements. Current fuel economy standards for passenger cars must average to 30.2mpg (miles per gallon) and the current penalty for non compliance is $5.50 for every 0.1mpg under regulations and multiplied by the number of cars in that years' fleet. If Company A's fleet has an average fuel economy of 29.8mpg with a total of 270,000 produced for U.S. markets, what will be the DOT fine imposed on the company?
Car Company A is in deep trouble with the U.S. Department of Transportation (DOT). It has been discovered that Company A's 2015 all-passenger car fleet has a mean fuel economy that falls short of the federal fuel economy requirements. Current fuel economy standards for passenger cars must average to 30.2mpg (miles per gallon) and the current penalty for non compliance is $5.50 for every 0.1mpg under regulations and multiplied by the number of cars in that years' fleet. If Company A's fleet has an average fuel economy of 29.8mpg with a total of 270,000 produced for U.S. markets, what will be the DOT fine imposed on the company?
First we want to determine the difference in minimum fuel economy standards and the actual fuel economy of Company A's fleet:
Given that Company A's fleet is out of compliance by 
and they have sold 
passenger cars in U.S. markets, we can calculate the fine as such:
Therefore, the total penalties for Company A totals 
for the entire fleet.
First we want to determine the difference in minimum fuel economy standards and the actual fuel economy of Company A's fleet:
Given that Company A's fleet is out of compliance by
Therefore, the total penalties for Company A totals
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Corporate average fuel economy (CAFE) standards are regulations in the United States set in place to improve the fuel economy of all the following vehicles except __________.
Corporate average fuel economy (CAFE) standards are regulations in the United States set in place to improve the fuel economy of all the following vehicles except __________.
Light trucks, such as diesel trucks and SUVs, are covered by CAFE standards, as well as cars. Semis, however, are not regulated by this legislature.
Light trucks, such as diesel trucks and SUVs, are covered by CAFE standards, as well as cars. Semis, however, are not regulated by this legislature.
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According to corporate average fuel economy (CAFE) standards, as of 2011, the standard fuel economy is more than __________ miles per gallon of gasoline.
According to corporate average fuel economy (CAFE) standards, as of 2011, the standard fuel economy is more than __________ miles per gallon of gasoline.
We aren't quite to 40 miles per gallon yet, but 2011 was the first year that CAFE regulations set the standard for over 30 miles per gallon. The standard from 1990 up to 2011 was just over 27 miles per gallon, still a vast improvement from 1978's 18 miles per gallon.
We aren't quite to 40 miles per gallon yet, but 2011 was the first year that CAFE regulations set the standard for over 30 miles per gallon. The standard from 1990 up to 2011 was just over 27 miles per gallon, still a vast improvement from 1978's 18 miles per gallon.
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Gasoline has an energy density of roughly 122.8 megajoules per gallon. A car company has produced a new economy car that has a fuel economy of 35 miles per gallon, and 0.877 MJ is exerted per mile to power the forward motion of the vehicle. What is the percent fuel efficiency of the car?
Gasoline has an energy density of roughly 122.8 megajoules per gallon. A car company has produced a new economy car that has a fuel economy of 35 miles per gallon, and 0.877 MJ is exerted per mile to power the forward motion of the vehicle. What is the percent fuel efficiency of the car?
The fuel efficiency of the vehicle can be calculated as such:
This equation gives us the energy converted to forward motion per gallon of gas. We can use this value to determine the percent of total fuel energy that is devoted to forward motion:
From these calculations, we can determine that 25% of the energy from a gallon of gas is converted to actual forward motion of the vehicle, giving us a fuel efficiency value of 25%.
The fuel efficiency of the vehicle can be calculated as such:
This equation gives us the energy converted to forward motion per gallon of gas. We can use this value to determine the percent of total fuel energy that is devoted to forward motion:
From these calculations, we can determine that 25% of the energy from a gallon of gas is converted to actual forward motion of the vehicle, giving us a fuel efficiency value of 25%.
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What are net-zero-energy buildings?
What are net-zero-energy buildings?
All of the answers are part of energy conservation. But to be net zero the building has to produce energy and cannot be using any more than it produces.
All of the answers are part of energy conservation. But to be net zero the building has to produce energy and cannot be using any more than it produces.
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