Convenient transportation is an accomplice of global warming. In order to protect the environment and cherish resources, Electric Vehicles is developing rapidly, hoping to improve energy efficiency.
San Carlos, CA (Merxwire) – Our world is being polluted, transportation is the source of carbon dioxide, this excessive carbon dioxide will make global warming worse. Through the technological development of electric vehicles, mankind can improve energy efficiency and recycle greenhouse gas. It is expected that electric vehicles will completely replace internal combustion engine cars in the near future.
Global warming caused by traffic
There have been many extreme climates in recent years. Current research points out that the cause of extreme weather is related to global warming. The greenhouse gas emitted by human burning of fossil fuels is an accomplice of global warming. It affects not only the melting of glaciers and rising sea levels, but also human activities and life.
With the development of industry, humans continue to burn coal, oil and other fuels, so carbon dioxide continues to be emitted, which increases the concentration of greenhouse gas. Transportation accounts for more than 20% of global carbon dioxide emissions. In 40% of countries, transportation is the country’s most important source of carbon dioxide emissions.
Therefore, in order to slow down global warming, transportation is currently the most important goal of many countries. Whether it is the relevant standards for new cars, or stipulating the last use time of internal combustion engine cars, they are all aimed at reducing greenhouse gas emissions caused by transportation activities through regulations.
Electric has better energy efficiency
The energy efficiency of Electric vehicles is nearly 5 times that of internal combustion engine cars. How can Electric vehicles achieve 80% energy conversion efficiency? Output power from the battery to the motor, and then drive the wheels to move, only about 60%-65% energy conversion efficiency. During the operation of the vehicle, the energy loss of air-conditioning systems, light bulbs and other components is about 0-4%, the energy loss of the motor drive system is about 16%, the loss caused by other functions is about 2.5%, and the energy loss of idle speed is nearly 0. .
In addition, the power injected into the battery during charging will also consume approximately 16% during transmission. It sounds unlikely that electric vehicles can achieve 80% energy conversion efficiency, but the key lies in the kinetic recycling system that almost all electric vehicles are equipped with. According to the US Energy Administration, the kinetic recycling system can contribute up to 17% of energy compensation, allowing the overall conversion efficiency of electric vehicles to approach or exceed 80%. Even so, electric vehicles without a kinetic recycling system can still have an energy conversion efficiency of 60%-65%.
What is the energy conversion efficiency of Internal combustion engine car? In the process of traditional vehicles outputting power, the energy consumption of the engine itself is as high as 68%-72%, including 58%-62% thermal effusivity, 3% combustion energy loss, and 4% gas entering And emission loss, and 3% friction loss. The energy consumption caused by electronic components such as air-conditioning system and lamp group is 0%-2%, and other systems and peripheral parts will also cause 4%-6% energy conversion loss. After deducting the above losses, only 16%-25% can be used to drive the vehicle.
Electric vehicles replace internal combustion enginecar?
The progress of battery technology is probably enough to allow the endurance of most electric vehicles to reach at least 320 kilometers. At the same time, with the expansion of economic scale and the investment of more manufacturers’ resources, the cost of electric vehicles will drop to about 30,000 US dollars, and this will be the market. Important turning point.
Electric vehicles have a simple structure, so the maintenance cost is lower than that of internal combustion engine cars. In the future, the stability of their batteries will be better and the cost will be lower. By then, for manufacturers on the market, the production of internal combustion engine will be Not in line with cost and economic benefits. This situation is similar to the previous camera industry’s conversion from traditional film cameras to digital cameras.
The energy efficiency of internal combustion engine is only about 17-21%, but the energy efficiency of electric can be as high as 80-95%. In addition, an internal combustion engine car has about 2,000 components, but in the case of “Tesla Model S”, there are only 18 movable components, which gives electric vehicles more advantages in maintenance. In the future, after the cost is reduced, consumers will be able to purchase high-performance electric vehicles at relatively low prices!