Quote:
Originally Posted by eduardo88
I agree, the trains do their job perfectly, maybe they look old design wise, but they run perfectly, 100x better than London could ever dream of.
I have to dissagree on the AC comment, I wish they had AC on the trains! It's horrible coming from -15 weather outside in your winter clothes, then being crammed into a car with 100 or so other people and roasting until you get out. It's strange to say, but the metro really needs AC during winter!
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I understand your sentiment regarding harsh Moscow climate and unpleasantness of having to be crammed in the same car with 100 Russians, but I am afraid you have not fully considered all problems that the use of AC generates.
AC of course does make it colder inside trains, but it also deposits a lot of heat in tunnels and stations. This makes the stations even more uncomfortable during hot weather (ever tried NYC subway during a heat wave?). For use of AC to make any sense, the AC generated heat needs to be properly disposed off from stations and tunnels. This is a problem even for shallow, just below surface stations (typical of American lines running below a street) that can be fairly easily ventilated. With deep stations (like many in Moscow) removal of heat generated by AC would be even more problematic. You would have as a result in winter - cold outside, hot stations and tunnels, cold inside trains. In summer it would be warm/hot outside, even hotter on stations, cold in trains. A lot of expense but not much of an improvement.
AC really works best on open/above ground lines. But Moscow summers are not hot enough to justify AC, and of course during winter you need heating, not cooling on open stretches. Also, since the air in the system comes from outside, it does get cooler on stations in winter in comparison to summer.
It probably would make more sense to cool the air thrown into stations during hot weather (I believe right now it is only filtered from dust, and perhaps not in all cases).
I wonder - do they use AC in Montreal, a city with winters similar to Moscow?