Dortmunds new trams were intentionally bought without AC (www1.wdr.de)

submitted 7 hours ago by 7bicycles@hexbear.net to c/urbanism@hexbear.net

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The funniest argument and the reason I share this is that since the utilities company that provides the tram service has a ratified goal of becoming CO2-Neutral eventually, they've elected to not buy ACs since they'd consume about 7 million kilowatt hours of electricity per year and ACs aren't sustainable. I assume the 50°C tram is gonna be a big hit as per transportation in the upcoming summers.

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[-] Nacarbac@hexbear.net 6 points 3 hours ago

Hm... needs largeish 18'C PCM iceblocks that can be slid into trains for passive cooling and then out into underground cooling slots to refreeze.

Just a total redesign of all train carriages and stations, several hundred extra kilos of saltice per carriage, and a few decades of testing. But easy, problem solved!

Or you set up to hand out PCM ice-bottles at stations so passengers can sit with it for the journey and then give them back to refreeze in a big fridge.

PCM iceblock: https://www.youtube.com/watch?v=Nqxjfp4Gi0k

I've made one so far, and it works pretty well. Avoids the freezerburn of an actual iceblock, doesn't need a freezer, and it's easy to make.