how efficient are diesel generators?pls read more below.?

if a diesel generator(say of negligible mass) is used to power an electric car powered by an electirc motor how efficient will it be when compared to a car that uses an i.c engine thats uses diesel directly?

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  • ?
    Lv 7
    7 years ago
    Favorite Answer

    The diesel electric drive does not improve the efficiency of the engine it improves the efficiency of the vehicle. There is a difference between theoretical efficiency, optimal efficiency based upon bench tests in a lab or real world efficiency. Diesel engines have a theoretical efficiency over 40% but bench tests will give us results around 35%. Real world efficiency in a vehicle is substantially reduced by the transmission, the need to idle, operate at a range of speeds, operator influence and road conditions. Real world efficiency may be around 20% or less. http://www.popularmechanics.com/cars/alternative-f...

    It is a general rule that inefficiency results from changing from one form of energy to another (diesel to motion to a generator and then from motion to to electricity and then back from electricity to motion) But GM had a profitable business from 1930 to 2005 making diesel / electric hybrid locomotive engines (In its Electromotive division.) and only sold that business when it started making the petrol / electric volt based upon the same series hybrid configuration. http://www.wired.com/science/planetearth/news/2005...

    A diesel engine providing electricity for an electric drive can operate at its most efficient optimal RPM. It can be turned off when the vehicle is stopped and the vehicle can start on battery power to the electric motors, The series hybrid configuration can eliminate the need for a transmission. Finally regenerative breaking is a very easy adaptation in such a hybrid vehicle. And so while the engine configuration may be slightly less efficient the overall vehicle efficiency can improve substantially. Fuel economy for hybrid vehicles can be more than double that for petrochemical alone counterparts. Much depends upon how the hybrid technology is implemented. Not all hybrids are equal.

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    Source(s): ------------------------------------------- The battery electric vehicle has an efficiency around 90% with some electric motors in highly efficient solar cars close to 99% efficient. A diesel engine does not have sufficient low end torque for starting a vehicle without the parasitic transmission. An electric car does not need a transmission. as it has full torque at 0 RPM. An idling diesel engine in a vehicle stopped in traffic is doing no useful work and its efficiency is 0. An electric vehicle stopped in traffic uses no energy for its motor. We can calculate the efficiency of a diesel generator by comparing the BTU content of the fuel and the BTU content of the electricity produced. Gensets listed here fall in the 20% to 30 % range. http://generators.findthebest.com/app-question/d/f...
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  • 3 years ago

    Most Efficient Diesel Generator

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  • Anonymous
    4 years ago

    This Site Might Help You.

    RE:

    how efficient are diesel generators?pls read more below.?

    if a diesel generator(say of negligible mass) is used to power an electric car powered by an electirc motor how efficient will it be when compared to a car that uses an i.c engine thats uses diesel directly?

    Source(s): efficient diesel generators pls read below: https://biturl.im/9t6PG
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  • kasab
    Lv 7
    7 years ago

    Direct use of the diesel engine to run the car is more efficient. With the other option, there is a chain of energy conversion each involves a loss.

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  • Randi
    Lv 4
    4 years ago

    For the best answers, search on this site https://shorturl.im/axSoQ

    Wow, you don't know what you're talking about. YES, I would support the law. 1. A Transwoman (living as a woman) walking into a women's restroom, IS in the right place. Bathroom attacks? Hyperbole. That's all cons have.

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  • 4 years ago

    I don't really see any greater likelihood of 'bathroom attacks'. Like that happens at any kind of frequency? Sounds like a made up issue. What they could do is have 3 bathrooms: female, male and neutral (everyone). I support protection for trans people because they get attacked and singled out more than even gay people.

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  • Irv S
    Lv 7
    7 years ago

    Both the generator, and the motor will be ~ 97% efficient in that size range.

    100 x .97 x .97 = ~94% efficient

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