Comparison of electric car vs. car combustion.

Comparativa coche eléctrico vs coche combustión

Comparison of electric car vs. car combustion.

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That the electric vehicle is more environmentally friendly than combustion vehicles is nothing new, but its gradual integration into the mobile park should not only be settled in this aspect, because in aspects of efficiency and economy He also outpaces his “rivals”.

To justify the theories that the electric motor has a performance 2.5 times higher than Diesel or 3.5 times higher than gasoline, we will proceed to a comparison that makes clear this aspect.

We will consider the following premises:

  • The average consumption of electric vehicles that are currently on the market is around 14 kWh/100km.
  • The average emissions of the Spanish Generation Electric mix is 0.234 KgCO2/kWh
  • The consumption of a diesel vehicle of about 100 CV is 5 L/100km
  • The emissions produced per liter of diesel consumed is 2.67 kgCO2/L

According to the above values, CO2 emissions expelled

  • By an electric would be about 3.3 KgCO2,
  • By a diesel engine vehicle would be 13.3 KgCO2,

We will also consider, the energy losses produced in the generation, transport and transformation of electricity, happening exactly the same with oil, which also has a greater expense in transport due to its necessary importation.

The three key factors in efficiency are;

  1. The “Well-to-tank” (the efficiency factor of transporting energy from its source to the car’s tank or battery),
  2. The “tank-to-wheel” (from the tank/battery to the wheels) and
  3. The “Well-to-Wheel” (being the sum of the previous ones).

being the global efficiency “Well-to-Wheel” of electric vehicles practically double the cars with MCIA. This efficiency factor takes into account, in the case of electric cars, the performance of generation, transport and distribution, the performance of the electric converter of the vehicle, of the batteries, of the mechanical system of the vehicle and of the electric motor.

Consumption is a key aspect of understanding the differences between the two types of vehicles. The average consumption at 100 km of the pure electric or BEV available in the Spanish market, discarding the industrial, is approximately 12.65 kWh. But these kWh consumed are only those that contain the battery. The necessary electricity extracted from an outlet or generated in a power plant, so that these 12.65 kWh reach the wheels, is slightly higher, due to the losses of the supply chain, both in the transport or distribution of that energy as in The charging process of the battery. As we have seen before with the efficiency factors, the main, the Well-to-Wheel, is one that takes into account all these losses. To know the real consumption of the electric vehicle will have to find out what these losses and quantify them.

Losses due to the transport and distribution of electricity within Europe are 6.32%. Which leaves us with a 93.7% performance. A standard power electronic converter has a throughput of 97%. A li-Ion battery like the one mounted by most modern electrics, with an internal resistance of 0175 MΩ, has an electrical performance of 99.14% and a thermal of 99.63%, which combined leave the battery with a performance of 98.8%. As for the electric motor, the advances in the matter have allowed the current electric cars to equip high efficiency engines, encrypting their average performance by 88.7%. Finally, the performance of the vehicle’s mechanical system, transmission and auxiliaries is around 80%.

With the average consumption value of an electric vehicle (12.65 kwh/100km) and the different yields according to models, it is obtained: kWh/100 km extracted from the battery: 12.65. EL Average price of kWh of the different electric marketers is €0.136366/kWh (a date of calculations). There is the option of taking a fee with time discrimination, allowing a lower energy cost on a schedule of 23 to 7h in winter, an hour later in summer. At this price, the cost of traveling 100 km with an electric is €1.71 average.

If you compare the consumption of an electric car with a standard combustion one with a motorization 1.4 petrol of 110CV that incorporates the system Star & Stop (disconnects the engine at the stops) and which registers a consumption of only 3.8 liters/100km, it turns out that :

– “Medium” electric vehicle: €1.71/100km

– Medium Petrol vehicle: €5.50/100km (with a price of petrol at the date of calculation of €1.44/litro).

The difference is truly advantageous for the electric vehicle, from the order of 2.5 – 3. For drivers who make 10,000 km per year, this difference is €380/year for the medium-fuel vehicle. And these economic differences can be enlarged if we take into account the maintenance spending that traditional cars have, far superior to that of the electric one, which does not need changes of oil, filters, belts or box of transmissions.

To be able to check if you get profitable the purchase of an electric car enters the web of Engadget

It should be noted that the electric Vehicles, in addition to having a large capacity to reduce CO2 emissions, also have a positive role in the reduction of other polluting gases, perhaps less well known, but very damaging to health, such as suspended particles (PM) or nitrogen oxides (NOx). These elements come to produce in urban nuclei respiratory problems, irritations or even premature deaths. According to some studies, the reduction of this type of compounds would directly prevent a minimum of 800 deaths per year in each of the major cities.

For all these economic and environmental advantages, Renobat ® has opted to dedicate all its efforts to the manufacture and assembly of lithium Ferro phosphate (LiFePO4) batteries for any electric vehicle.


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