Ethanol and alternative fuels such as E85 The energy content of 1.5 US gallons (5.7 litres) of ethanol is the same as that of 1.0 US gal (3.8 litres) of gasoline. Fuel ethanol has an energy content of 76,100 BTU/US gal (5.89 kilowatt-hours per litre), whereas gasoline has an energy content of 114,100 BTU/US gal (8.83 kWh/l). (See the diagram above)
What factors influence the determination of GGE and DGE values?
|Fuel||Energy Content*||Quantity of Fuel in 1 GGE|
|Ethanol (E85)**||88,258 Btu/gallon||1.32 gallon|
|Electricity***||3,414 Btu/kilowatt hour (kWh)||34.00 kWh|
|Propane||84,250 Btu/gallon||1.38 gallon|
|Hydrogen||288.88 Btu/ft3 or 51,585 Btu/lb||401.86 ft3 or 2.25 lb|
What is the difference between E85 and ethanol?
A blend of gasoline and ethanol up to 83 percent is available as E85 (or flex fuel), which may be used in flexible fuel cars, which are intended to run on any combination of gasoline and ethanol.
How does E85 affect fuel economy?
The energy content of E85 varies depending on the amount of ethanol present. E85 contains less energy per gallon than gasoline to variable degrees (the impact on fuel economy lessens as the ethanol content decreases). More than 3,300 public E85 outlets are located in 42 states, providing high-level ethanol blends to the almost 21 million FFVs that travel the roads of the United States.
What percentage of gasoline has ethanol in it?
More than 98 percent of gasoline sold in the United States contains ethanol, usually in the form of E10 (10 percent ethanol to 90 percent gasoline), which helps to oxygenate the fuel and minimize air pollution.A blend of gasoline and ethanol up to 83 percent is available as E85 (or flex fuel), which may be used in flexible fuel cars, which are intended to run on any combination of gasoline and ethanol.
What does E85 stand for?
Stations, Vehicles, Legislation, and Incentives the number e85 e85 e85 e85 e85 e85 e85 e85 e85 (Flex Fuel) E85 (also known as flex fuel) is a word that refers to high-ethanol-to-gasoline mixes that range from 51 percent to 83 percent ethanol, depending on the region and season in which they are used (see Fuel Propertiesand E85 Flex Fuel Specification).
What is the energy content of ethanol?
Fuel ethanol contains less energy than gasoline, which means it is more environmentally friendly. Ethanol has a heating value of around 27 MJ/kg and a volumetric heating value of approximately 21 MJ/l, which is only 65 percent of the volumetric energy content of gasoline. Consequently, when ethanol is used instead of gasoline, the volumetric fuel consumption is greater.
Does E85 have more energy than gas?
Fuel economy and performance are important factors to consider. For example, E85, which contains 83 percent ethanol by volume, provides around 27 percent less energy per gallon than regular gasoline (see chart) (the impact to fuel economy lessens as ethanol content decreases).
What is the ethanol content of E85?
E85 (also known as flex fuel) is a word that refers to high-ethanol-to-gasoline mixes that range from 51 percent to 83 percent ethanol, depending on the region and season in which they are used (see Fuel Properties and E85 Flex Fuel Specification).
What is the energy density of ethanol?
Table 1 shows the energy density (measured in MJ/kg) of a range of various types of fuel. The energy density of the fuel.
|Crude oil||44 MJ/kg|
What’s the octane rating of E85?
Because ethanol has a high octane rating by nature, E85 always has an octane value greater than 100. This is one of the reasons why ethanol is frequently utilized as racing fuel.
How do you find the energy content?
The formula Q = mc t can be used to compute the amount of energy present. According to this formula, Q represents energy in joules or calories, m represents mass in grams, c represents specific heat, and T represents temperature change, which is defined as the end temperature minus the beginning temperature. The specific heat of water is one calorie per gram of water degrees Celsius.
Will E85 make more power?
4. Increased rate of combustion. When compared to gasoline, the ignition time and flame propagation of E85 fuel are significantly faster. This results in greater cylinder pressure, as well as enhanced engine torque and power, with gains of up to 20 percent in some cases.
How much energy does it take to make a gallon of ethanol?
The production of ethanol from corn necessitates a significant amount of heat energy. To make a gallon of ethanol, around 35,000 Btu of thermal energy is required in most instances. In comparison, ethanol has an energy content of around 75,000 Btu per gallon.
Is E85 better than 93?
E85 has a higher octane rating than conventional gasoline, which has a standard value of 87, or premium gasoline, which has a rating of 91-93. Due to this, it may be utilized in engines with greater compression ratios, which have the tendency to create more power per unit of displacement than their gasoline equivalents.
Why is E85 so cheap?
In general, the higher the ethanol percentage, the lower the mileage per gallon (MPG). If you’re concerned about your vehicle’s fuel economy, look for flex fuel that has a lower ethanol concentration. Because E85 is taxed at a lower rate than gasoline, it still costs less than gasoline.
What is the octane rating of E50?
I’m not sure if 105 octane is too high for E50, but I haven’t done the math in a long time. In boosted applications, I’m not sure what E85’s ″real″ octane rating is, but it ″acts″ like it has a rating of 120+. I would recommend using E50 mixed with 93 to attain a decent octane while still reaping the advantages of ethanol.
Is E85 better than 87?
In spite of the fact that E85 petrol is less expensive than ordinary gasoline at the pump, the drop in miles per gallon makes driving with it more expensive. While flex-fuel cars achieve lesser miles per gallon when using E85 instead of conventional gasoline, they often produce higher torque and horsepower.
What is energy density in physics?
The quantity of energy stored in a particular system or region of space per unit volume is referred to as its energy density in physics.
What is high energy density?
High energy density (HED) science is the study of systems of matter and radiation operating at extremely high temperatures (usually millions of degrees Celsius) and pressures (often millions of pounds per square inch) (over a million atmospheres).
What has the highest energy density?
Uranium is the substance with the highest energy density. Moreover, because nuclear power does not require combustion, there are no byproducts of combustion to contaminate the environment.