Walking on the road when it is dark, if there is no street lamp is a dark one. The same applies to cars. If you don't turn on the headlights while driving, you can't see the road conditions ahead. However, Xiao Bian encountered a lot of driving is not to open the headlights, and some of them do not know how to turn on the headlights, and more people feel that opening the headlights waste electricity, or provinces. Although the automobile engine is in operation, the generator will operate at the same time to convert the kinetic energy of the engine into electric energy, which is irreversible. However, according to the law of conservation of energy, these consumed electrical energy are all derived from gasoline, but they are all silver. Then the question is: How much electricity is consumed when we turn on the headlights every day? In other words, you don't want to turn on the lights all day. How much money can you save in a year? Suppose we drive an average of 2 hours per day, including 1 hour at night. There are 2 low beam lights and 2 high beam lights on the vehicle. The power is 65W (0.065kW), and the low beam lights are within this hour. Always on, and high beam only applies for 15 minutes. Then every day they consume electricity: 2*0.065*1+2*0.065*(15/60)=0.1625kW•h In a total of 365 days a year they consume a total of electricity: 0.1625 kW * 365 = 59.3125 kW · h If you think about it, this seems to be equivalent to the amount of electricity used by the old couple who saves and saves. How much gasoline is consumed by these electricity? We know that the calorific value of gasoline is 42 MJ/kg, which is equivalent to 5.68×10^7 J/L, and the energy of once electricity is 3.6×10^6J. With a gasoline engine conversion rate of 30% and a generator power generation efficiency of 90%, if the engine only drives the generator to generate electricity, this energy is emitted to consume a total of gasoline: Calculated with the price of Beijing 92 petrol at 6.2 yuan/L, these gasolines will cost a total of 86.18 yuan. This does not count toward the usual turn signals, brake lights, fog lights and daytime driving lights. If we count these, we must spend at least 100 yuan each year to light these light bulbs. If you don't turn on the lights, you can save so much money. If you don't want to turn on the lights, you can continue to save! NINGBO SUNWINJER DAILY PRODUCTS CO.,LTD , https://www.lux-pack.com
How much money can you save in a year without headlights? The result was unexpected