ALSTOM Transport has developed a hybrid shunting locomotive for industrial applications in Europe. Built at the Stendal locomotive plant in Germany, the prototype 203 701 conversion of a former DB diesel-hydraulic is expected to receive formal certification next February and begin field testing in April 2007. A 200 kW Deutz-engined diesel genset powers a DC link which charges a NiCd battery. The link is also connected to the traction inverter, which feeds two three-phase motors. The loco is designed to operate on genset or battery power alone, or with both sources offering a maximum of 550 kW. The power modules, electric motors and auxiliary converter are all standard Alstom designs proven extensively in other applications. Because the prototype is a conversion of a diesel-hydraulic B-B, the motors drive through the existing mechanical transmission. To balance the weight of the centre-cab unit, the diesel engine and auxiliaries are mounted in one bonnet, with the batteries and traction inverters in the other. Alstom is also looking at converting diesel-electric locos to hybrid drive. Starting tractive effort is 195 kN, falling to 20 kN at a maximum speed of 60 km/h. The performance curve compares closely to a conventional 500 kW diesel-hydraulic, with a maximum train weight of 3 000 tonnes. Because most shunting locos are idling for around 75% of the time, Alstom estimates that the hybrid can cut fuel use by up to 40% and maintenance costs by 15%. As well as a 30% cut in life-cycle costs, the conversion offers a 15 dB(A) noise reduction and a 55% cut in emissions to well below the EU Stage IIIA requirements.
New Lake Delhi dam and spillway. (file photo)A bill making its way through the legislature may reduce the cost for repairs at Lake Delhi in eastern Iowa.The dam on the Maquoketa River that created the lake was washed away by flooding in June of 2010. The “Combined Lake Delhi Recreational Facility and Water Quality District” issued bonds to pay for a new dam.The bill that’s cleared the Senate today would let the association reissue the bonds and Senator Randy Feenstra of Hull estimates it will save about $300,000.“It’s not adding anything to the bonds,” Feenstra says. “It’s just simply refinancing them. Through the refinancing, this bill would say you don’t have to take another public vote, but a public vote would be required for any other bonds moving forward.”In 2011, residents in the Lake Delhi district overwhelmingly approved a six-million dollar bond referendum to help finance reconstruction of the lake’s dam. Gates on the rebuilt dam were closed last summer and the 400-acre lake was refilled in about three weeks.Share this:FacebookTwitter