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regarding the issue of high-speed rail energy consumption that netizens are concerned about

china railway editor

china academy of railway sciences group co., ltd.

interview with huang jin, deputy chief engineer of the locomotive and rolling stock research institute

interpreting the energy-saving secrets of fuxing emu

why are china's high-speed trains considered energy-saving, green and environmentally friendly means of transportation?

china's high-speed trains are outstanding in energy saving as follows:first, control traction energy consumptionthe vehicle body is made of lightweight composite materials, and its appearance adopts drag reduction technologies such as streamlined head shape and sunken pantograph, making the vehicle body light in weight and low in running resistance.second, control the braking energy consumptionthe composite braking technology is adopted, and regenerative braking is given priority during braking, converting the vehicle's kinetic energy into electrical energy and feeding it back to the power grid.the third is to control auxiliary energy consumptionthe car uses energy-saving electrical equipment such as led lighting, variable frequency air conditioner, variable frequency fan, etc. to save electricity.

the outstanding performance in green and environmental protection is as follows:first, "zero emission" of pollutantsit is powered by electricity and does not produce harmful gases. during operation, the sewage and dirt in the carriage are collected and treated in a centralized manner to achieve "zero emissions".second, low operating noisethe train adopts a variety of noise reduction technologies, such as low dynamic stiffness vibration reduction, multi-layer structure impedance adaptation, and low-frequency resistance multi-layer sound absorption/insulation section structure, to reduce noise interference to the surrounding environment.third, the recycling rate is highon the premise of ensuring safety and comfort, china's high-speed trains use a large number of environmentally friendly materials and clean production processes to reduce pollution to the environment.

is it true that “china’s high-speed rail consumes 10,000 kilowatt-hours of electricity per kilometer”?

the statement that "china's high-speed trains consume 10,000 kwh of electricity per kilometer" is a misleading statement and does not correspond to the facts. taking the existing four main models of 8-carriage trains, namely crh380a, crh380b, cr400af and cr400bf, as examples, their wheel power is 9360kw, 9200kw, 9750kw and 10140kw respectively. the energy consumption test data under the running condition of 350km/h on the beijing-shanghai high-speed railway (round-trip distance of 2636 kilometers) shows that their power consumption is 56931 kwh, 61861 kwh, 51364 kwh and 55490 kwh respectively. based on this, the average power consumption per kilometer is calculated to be 21.6 kwh, 23.5 kwh, 19.5 kwh and 21.1 kwh respectively.

it can be seen from this that the online rumor of "10,000 kwh of electricity consumption per kilometer" is actually the hourly power consumption calculated based on the wheel power of the high-speed rail emu, which is mistakenly taken as the power consumption per kilometer, thus replacing the concepts of unit time and unit mileage.