Hybrid Locomotive
From Wikipedia, the free encyclopedia
Hybrid Locomotive is a Locomotive or Multiple Unit Train that uses an on-board rechargeable energy storage system (RESS) and a fuelled power source for propulsion.
Hybrid trains typically are powered either by Fuel Cell technology or the slightly more conventional diesel-electric hybrid which reduces fuel consumption through regenerative braking and switching off the hydrocarbon engine when idling or stationary (as used in autmobiles such as the Toyota Prius).
Energy used by train operations makes up approximately 70% of all energy consumed by railroad companies and reduction of this not only provides environmental benefits but economic advantages as well.[1]
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[edit] Examples in use or under development
[edit] JR fuel cell train
In May 2003 JR East started test runs with the so called NE (new energy) train and validated the system's operability (series hybrid with lithium ion battery) in cold regions.
With two 65-kilowatt fuel cells and six hydrogen tanks under the floor and a battery on the roof. It is capable of 100km/h (60mph) with a range of between 50 and 100 km (30 and 60 miles) without needing to be refulled.
Research is underway into the use of regernative braking to recharge the train's batteries with the energy used to stop the train which will increase range further. JR hopes to introduce the train to sheduled local service in the summer of 2007.
[edit] RailPower diesel-electric hybrid shunting locomotive
In 2004, RailPower Technologies had been running pilots in the US with the so called Green Goats which led to orders by the Union Pacific and Canadian Pacific Railways starting in early 2005
The diesel-electric hybrid trains are expected to cut emissions between 80 to 90-percent and decrease fuel consumption between 40 to 60-percent compared to conventional diesel-powered locomotives. The Green Goats will be used in rail yards to separate to sort out railcars for inbound trains and lining up outbound trains.
[edit] European Development
In 2007 trials of a new hybrid high speed train are sheduled to start in the UK. The system will use a battery-assisted diesel-electric power system which it is hoped will cut emissions by up to 50% and reduce fuel costs by 20%.[6].
