Application Trends of Green and Environmentally Friendly Materials and Technologies in Railways
- What are the commonly used green and environmentally friendly materials in railway construction?
For track components, recyclable materials such as aluminum alloy and stainless steel are used to manufacture turnouts, fasteners, and other components, reducing resource waste. Bio - based rubber is used to make elastic pads, which can degrade naturally and reduce environmental pollution. In terms of building materials, recycled aggregate concrete is promoted. Construction waste is recycled and used as concrete aggregate, reducing the exploitation of natural sand and gravel. New thermal insulation materials are used in railway station construction to reduce energy consumption.
- What are the energy - saving and emission - reduction technologies in railway operation?
In the traction power supply system, regenerative braking energy recovery technology is applied, converting the energy during train braking into electrical energy and feeding it back to the power grid, with a recovery efficiency of 30% - 40%. Intelligent lighting control systems are used to automatically adjust the lighting brightness of railway stations and tunnels according to ambient light and human activities, reducing power consumption. In terms of locomotives and vehicles, electric locomotives and hydrogen - fueled locomotives are researched and promoted to reduce fuel consumption and exhaust emissions.
- How do green and environmentally friendly technologies affect the cost and benefits of railway projects?
In the initial stage, the application of green and environmentally friendly technologies and materials may increase the project construction cost by 10% - 15%. However, in the long run, energy - saving and emission - reduction technologies can reduce operating costs. For example, the regenerative braking energy recovery technology can save tens of millions of yuan in electricity bills for a busy railway line every year. The use of degradable materials reduces the disposal cost of waste components. At the same time, green railway projects can enhance corporate image, obtain policy support and social recognition, bringing intangible benefits.
- What is the current development status of railway green and environmentally friendly technologies internationally?
Europe is in a leading position in the application of railway environmental protection technologies. For example, the Swiss railway has achieved 100% electric traction, and the electricity mainly comes from renewable energy sources. The lightweight trains developed in Germany use carbon fiber composite materials, reducing the train weight by 20% and energy consumption by 15%. Japan has advanced technology in railway noise control. New - type sound - proof barriers and low - noise wheels are used, reducing the noise along the railway by 10 - 15 decibels.
- What is the development plan of China's railway in the field of green and environmental protection?
China's railway has set clear green development goals. By 2030, the comprehensive energy consumption per unit of railway transportation work will decrease by 15% compared with 2020, and the carbon dioxide emission intensity will decrease by 25%. In the future, it will increase investment in the research and development of green and environmentally friendly technologies, promote the application of new energy locomotives, and build more green railway demonstration projects. It will also improve the railway green standard system, promote the green transformation of the entire industry chain, and help achieve the "dual - carbon" goals.