PRESS ANNOUNCEMENT - 8th December, 2004
GREENHOUSE GAS EMISSIONS
TRANSPORT CAN IMPROVE ITS PERFORMANCE, STARTING NOW
The recent news that the UK's progress on reducing its carbon dioxide emissions is unlikely to meet the Government's own target of a 20% cut between 1990 and 2010 calls for new thinking on the way to cut carbon-based energy consumption and waste.
An important sector is transport, which contributes a significant proportion of the country's total output of carbon dioxide. Yet a single development - already in limited use - could massively cut the requirement for energy in transport. That development is energy recovery and storage.
Generally, a vehicle brakes by transforming the energy of its motion into heat, which is then dissipated into the environment. This is true of road, rail, marine and air transport, although the transformation process varies. However, a few systems - including some British rail routes - are capable of using braking energy to provide power for vehicles. This usually takes the form of electric trains feeding energy back into the power lines to be used simultaneously by other trains or by the national grid.
But a vehicle can reuse its own braking energy to accelerate again after braking. Ideally, a high proportion of the energy that goes into powering the vehicle can be recaptured and reused, resulting in a step change in transport fuel efficiency. This is now beginning to be achieved in a few automotive applications, such as the Toyota Prius, and also by the rail vehicles developed and supplied by Parry People Movers Ltd (PPM), which feature flywheel energy storage.
"No-one has corrected me yet when I say that PPM's products are the only self-powered rolling stock anywhere that regenerate their braking energy," said Projects Manager Caspar Lucas. "Conventionally this is only achieved with electric trains - but we know better."
Another advantage of PPM's energy storage system is that engines and transmissions are kept small because the short-term power needed for acceleration is delivered from the flywheel. This not only means lighter weight, lower cost and easier maintenance, but also that the running noise is much lower than a typical diesel train. Passengers have commented that PPM vehicles are more like electric light rail than diesel trains.
PPM's Chairman John Parry said, "Our trams and railcars are low weight, so they don't need as much energy. They can be self-powered, so they don't need electrification. And they recapture their own braking energy, making them even more fuel-efficient. The final piece in the jigsaw is that they provide the quality of modern light rail: the only type of public transport that will consistently attract drivers out of their cars. The environment benefits from all of these factors."
1. Parry People Movers Ltd (PPM) was founded in 1992 to develop rail transport based on a new innovation: the flywheel energy store. The company is owned by approximately 200 shareholders and is quoted on the OFEX market.
2. PPM rail vehicles offer the quality of modern light rail transport without the need for electrical power supply, giving excellent environmental performance and energy efficiency at lower cost than conventional technology. The same technology can be used on railways or urban tramways. PPM vehicles are fully compliant with accessibility regulations.
3. The vehicle technology used in PPM vehicles is licensed to the company by JPM Parry & Associates Ltd (www.parryassociates.com), a West Midlands engineering company specialising in overseas development, integrated transport, and energy/environmental issues.
4. Pre Metro Operations Ltd, a company associated with PPM, is developing innovative operational methods for the provision of public transport by different modes, including the forthcoming PPM operation at Stourbridge. Pre Metro Operations Ltd is a licensed train operating company.
For further information, please contact:
John Parry MBE
Parry People Movers Ltd
Telephone: +44 (0)1384 569553
Fax: +44 (0)1384 637753