Wiktor Wise
High-speed trains are predominantly powered by electricity, with some trains also running on diesel traction. The power source for these trains varies depending on the physical infrastructure of the railway lines they run on. Electric trains are advantageous as they produce no local pollution in critical urban areas, and renewable energy sources can be used to power them. In the early 1900s, Germany became the first country to run a prototype electric train at speeds exceeding 200 km/h, and several countries have since developed high-speed electric rail services.
| Characteristics | Values |
|---|---|
| Power source | Electricity, diesel, third rail |
| Speed | Above 250 km/h |
| Examples | Eurostar, Shinkansen, TGV, Maglev |
| Advantages | No local pollution, ability to serve multiple stops |
| Countries with high-speed railways | China, Japan, Spain, France, Germany |
Explore related products
What You'll Learn
High-speed trains can run on diesel
High-speed trains can indeed run on diesel. In fact, the UK is known for operating the world's fastest diesel trains, despite the fact that all other operators have moved on to electric trains for high-speed intercity travel. The InterCity 125, also known as the High-Speed Train (HST), is a diesel-powered high-speed passenger train built by British Rail Engineering Limited between 1975 and 1982. The HST is the fastest diesel locomotive in the world, with a maximum speed of 148.5 mph (239.0 km/h) and a regular service speed of 125 mph (201 km/h).
The HST was formed of a set of Mark 3 passenger coaches between two streamlined power cars, one at each end. Each power car was fitted with a Paxman Valenta diesel engine, chosen for its light weight and high power-to-weight ratio. The HST was designed to sustain speeds of 125 mph (201 km/h) on the Great Western Main Line, East Coast Main Line, Midland Main Line, and the Cross Country Route. The introduction of the HST resulted in significantly reduced journey times and large increases in passenger numbers.
The prototype InterCity 125 set a world record for diesel traction, reaching a speed of 143 mph (230 km/h) on June 12, 1973. The HST also holds the world speed record for a diesel train carrying passengers. The HST is considered one of the most successful trains to have operated on the British railway network due to its impact on journey times and longevity.
In addition to the HST, there have been other cases of high-speed diesel trains. For example, the Eurostar linking Paris and London was powered by a third rail when it reached London on a shared track before a new line could be opened. However, its speed was restricted when running on this third rail. Additionally, the early stages of the development of the new generation of maglev Shinkansen trains included a small diesel generator onboard to power lights and controls. While diesel-powered high-speed trains have been successful, they are generally considered inferior to electric-powered trains.
Tesla Coil Electricity Transmission: Unveiling the Intriguing Process
You may want to see also
Explore related products
Overhead AC is superior to third rail DC
High-speed trains can be powered by diesel traction or electricity. While diesel trains can be high-speed, electric trains are superior. Electric trains can be powered by either a third rail or overhead catenary, with the latter being superior.
Secondly, third rail systems are more susceptible to electromagnetic interference, which can impact electrical components. Overhead AC systems do not have this issue.
Thirdly, tunnel construction for overhead catenary systems is more expensive than for third rail systems due to the larger profile required. However, this disadvantage is offset by the fact that overhead AC systems can achieve higher voltages, reducing losses and current.
Additionally, while third rail systems were traditionally favoured for metros due to their suitability for urban applications with frequent stops and high acceleration, the development of power electronics has made it possible to use AC on trains reliably and increase voltage. As a result, the preference for third rail systems may be shifting towards overhead AC systems, as evidenced by the Delhi Metro's recommendation for other metros in India to adopt a 25kV AC overhead system.
In summary, while both third rail DC and overhead AC traction systems have their advantages and disadvantages, overhead AC is superior for high-speed trains due to its ability to operate at higher voltages, reduced electromagnetic interference, and potential for increased energy efficiency.
Electrical Inspection: Passing with Preparation and Professionalism
You may want to see also
Explore related products
Maglev trains are powered by coils along the track
Maglev trains, or magnetic levitation trains, are a type of high-speed train that runs on electricity. Unlike conventional trains, maglev trains do not have a traditional engine; instead, they are powered by magnetic fields created by electrified coils in the guideway walls and tracks. This technology, known as electromagnetic propulsion, allows the train to levitate and move forward without the need for fossil fuels.
The key principle behind maglev trains is the interaction between magnets and electromagnetic coils. The guideway, or track, contains a magnetized coil that repels large magnets on the train's undercarriage, causing the train to levitate. Once levitated, power is supplied to the coils within the guideway walls, creating a dynamic magnetic field that propels the train forward. This is achieved by constantly alternating the electric current supplied to the coils, which changes the polarity of the magnetized coils and creates a pull-and-push effect.
The use of magnetic fields provides several advantages for maglev trains. Firstly, it eliminates the need for physical contact between the train and the track, reducing friction and allowing for faster speeds. Maglev trains can travel much faster than conventional trains, including bullet trains, with less environmental impact. Additionally, the absence of a traditional engine makes maglev trains more inconspicuous and quieter than their diesel-powered counterparts.
While maglev trains offer significant benefits, there are also some challenges to consider. One of the main drawbacks is the high cost of construction and maintenance. The technology required for maglev trains, such as superconducting magnets and cooling systems, can be expensive. Additionally, the power requirements for the coils along the track can be prohibitive over long distances.
Despite these challenges, maglev trains present an innovative and environmentally friendly approach to high-speed transportation. With ongoing advancements in technology and infrastructure, maglev trains have the potential to revolutionize travel, offering faster, more efficient, and safer transportation options for passengers.
Switching Electricity Suppliers: A Simple Guide to Saving Money
You may want to see also
Explore related products
Electric trains produce no local pollution
The case for electric trains is even stronger when we consider that they can run on renewable energy sources. This means that they produce no local pollution in critical urban areas. In contrast, diesel trains emit harmful pollutants that can negatively impact the environment and the health of those living nearby.
The benefits of electric trains over diesel trains will only improve as the electricity generation industry continues to reduce its carbon levels and move towards decarbonisation. This is especially important as the demand for energy from renewable sources is increasing.
In addition to the environmental benefits, electric trains also have economic advantages. They are more cost-effective to operate than diesel trains, as electricity is a cheaper fuel source. This can result in lower fares for passengers, making electric trains a more attractive option for commuters.
The advantages of electric trains are clear, and they have become an important part of the transportation system in many countries. By reducing localised air pollution and providing a more efficient and affordable mode of transport, electric trains are helping to create a greener and more sustainable future for all.
Sleep Number i8 Twin: Energy Efficiency and Your Sleep
You may want to see also
Explore related products
High-speed rail can complement airport operations
High-speed rail (HSR) can complement airport operations in several ways. Firstly, HSR can serve as a competitive alternative to short-haul flights, especially in areas with higher population density or where gasoline is expensive. The time taken for loading and unloading passengers, landing, taxiing, and taking off in airplanes can be significantly reduced by opting for HSR. Additionally, HSR is less weather-dependent than air travel, as it can operate efficiently even during hot hours when takeoffs become uneconomical or problematic due to heat, as seen with Hainan Airlines in Las Vegas in 2017 and Norwegian Air Shuttle's cancellation of Europe-bound flights during summer.
HSR also offers comfort advantages over air travel, as passengers are allowed to move freely about the train at any point during the journey. Airline calculations to minimize weight to save fuel and enable takeoff at specific runway lengths result in stricter weight restrictions on plane seats, compromising legroom and padding. In contrast, HSR seats are less subject to weight restrictions and can offer more spacious and comfortable accommodations. Furthermore, HSR may be more environmentally friendly than air travel, as trains can run on renewable energy, producing no local pollution in critical urban areas, while major airports are heavy polluters, contributing to particulate pollution and noise issues for residents.
The introduction of HSR can also have economic impacts, potentially increasing the spatial disparity of economic activities between cities with HSR and those without. However, within cities that have HSR, there may be varying impacts on large and small cities depending on several factors. HSR can influence the frequency of flights, traffic volume, fares, service quality, and market power. Additionally, HSR can stimulate long-haul or international air traffic, making its overall impact on emission reduction unclear.
Some countries, such as the Netherlands, France, and the US East Coast, are advocating for the use of trains over planes for shorter distances. For example, France aims to ban most airline flights of two hours or less within the country. HSR can also contribute to the development of commuter communities, as seen with the TGV system in France, where lower prices on long-distance travel have made cities within an hour of Paris accessible for commuters.
In conclusion, HSR can complement airport operations by providing a competitive, comfortable, environmentally friendly, and efficient alternative to short-haul flights, particularly in densely populated areas or where gasoline is expensive. However, the introduction of HSR also has economic implications and can influence the aviation industry's operations and market power.
Electricity Rates: Dynamic Pricing and 5-Minute Intervals
You may want to see also
Frequently asked questions
Yes, high-speed trains can run on electricity. In fact, electric trains produce no local pollution in critical urban areas.
High-speed trains can get their power from overhead lines or third rails. There have also been cases where a high-speed train gets power from a small diesel generator on board.
Some examples of high-speed trains that run on electricity include the German high-speed service, the Italian electric-multiple-unit ETR 200, the French National Railway's CC 7100 electric locomotives, and the Eurostar.
High-speed trains that run on electricity can complement airport operations during hot hours when takeoffs become uneconomical or problematic due to heat. They also produce no local pollution in critical urban areas.
