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Reader Comments (Page 1 of 1)
9-25-2008 @ 3:34PM
ron (Elect Eng) said...
There is as has been pointed out a few flaws in Boris idea . Air-conditioning works by transferring heat from the inside of a building or in this case train to the outside. The problem is where does all the transferred heat & the heat from the energy to transfer it go? Answer: To the air in the tunnel. the air temperature in the stations and tunnels is already very high in the summer so adding heat from the trains is only going to make it far worse. A person will get out of a cool carriage and be hit by the high temperature and humidity of the station, while at the same time the cool air will escape from the carriage being replaced by the hot air outside! this will use even more energy once the train gets going to cool it down again, making the tunnels & stations even hotter The cycle goes on...
Back to the drawing board.
Cool the stations and tunnels & the trains will be bearable.How you may ask not a big problem (send cheque in post for my ideas) The problem is the COST but probably cheaper in the long run than changing all the trains & all the problems of maintaining the on-board air conditioning units against that of maintaining the much bigger static units which would be installed on the underground network. but again it is the cost of installation power consumption & maintenance which is the problem. cancel the 2012 Olympics & using the money will give you some idea & better way to spend the money long term!
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