Improved AC system in new Delhi Metro trains

NEW DELHI: The Delhi Metro, which has a 111-km-long network in the city now, has introduced an improved air-conditioning system in the new trains that are being inducted into its fleet.

These new trains will be able to provide 25 degrees Celsius temperatures for the comfort of passengers even though the outside temperature is touching a scorching 44 degrees in the city these days. The new trains, which are being supplied by Bombardier and MRM Consortium, have two roof-mounted package air-conditioning units of a capacity of 52 kW (about 14.8 tonnes) each and their ducting has been done in such a manner that uniform temperature is maintained inside each coach including the vestibule and gangway interconnecting two coaches.

The air-conditioning units are computer controlled and in case of any defect or malfunctioning in any one unit, it will be possible for other unit to provide backup flow of cold air for the comfort of metro passengers. The metro train operators will be able to maintain the temperature levels in the coach and can adjust the temperature depending upon the requirement.

The air-conditioning units are equipped with self-diagnostic software to detect any fault in the system. As an abundant precaution all the air-conditioning units of each metro train are checked every day before the trains leave the maintenance depot of their respective lines.

In view of the high temperatures in Delhi, the Delhi Metro air-conditioning units have been designed to function even up to an outside ambient temperature levels ranging from 48 degrees to 58 degrees Celsius for long durations.

The DMRC is also able to provide comfortable air-conditioning to its passengers at all underground metro stations by maintaining 27 degrees ambient temperature.

http://www.hindu.com/2010/05/17/stories/2010051755350400.htm

Published in: on May 24, 2010 at 4:31 pm  Leave a Comment  
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