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Steam Networks

worksinprogress.co

21–30 of 161 posts

Re: Steam Networks

#21
post #15

How is mildew and mold avoided in the pipeline and interior spaces being heated by steam?

Super heated water is a pretty effective disinfectant within the pipes. For interior spaces ventilation is a legitimate problem in non-forced-air systems.

Historically, you open a window.

Re: Steam Networks

#22
post #15

How is mildew and mold avoided in the pipeline and interior spaces being heated by steam?

if steam leaks out and gets trapped somewhere, presumably that's a breeding ground for mildew and mold

inside the pipe, can much life survive? is there anything to eat in there? has anything evolved specifically to live in NYC steam pipes?

Re: Steam Networks

#23

Even Seattle has one of these! And the University of Washington as well. It’s amazing that the economics holds up even today. https://en.m.wikipedia.org/wiki/Seattle_Steam_Company

Grand Rapids, MI, too: https://www.vicinityenergy.us/blog/our-history-vicinity-ener...

Re: Steam Networks

#25
This part really caught my attention:

> in 1962, the anthracite seam under Centralia, PA – 25 miles to the west of Lehigh County – caught on fire and is still burning today.)

That’s crazy to think that for over 60 years there’s been an underground coal mine on fire. I wonder how long the mines will burn for. The pictures on Google are quite interesting.

Re: Steam Networks

#26
post #8

I always thought watching films that steam in the dark streets was some cool 80s aesthetics. As in 'You are in this dark corner of the city where nobody can hear you' scary or edgy.

It would be a shitty steam network that allowed steam to just leak.

Steam rising out of manholes is definitely commonplace in NYC: [1]

There's a stretch of sidewalk in the Financial District that gets so hot that you can feel it walking past on some days. And apparently, sometimes these things explode... [2]

As far as I've heard it's not (all) actual leaks, though, but rather water dripping on the exterior of the hot pipes carrying the steam itself being evaporated.

[1] https://en.wikipedia.org/wiki/New_York_City_steam_system

[2] https://en.wikipedia.org/wiki/2007_New_York_City_steam_explo...

Re: Steam Networks

#27
post #8

I always thought watching films that steam in the dark streets was some cool 80s aesthetics. As in 'You are in this dark corner of the city where nobody can hear you' scary or edgy.

It would be a shitty steam network that allowed steam to just leak.

you can see it pretty often in NYC, coming up from vents/pipes in the road

i don't think it's steam leaking. it's drainage/sewer water being heated by the steam system (and other heat sources down there) enough that it evaporates and rises up to the street, and then condenses into vapor/fog because the street level is cooler

Re: Steam Networks

#28
post #8

I always thought watching films that steam in the dark streets was some cool 80s aesthetics. As in 'You are in this dark corner of the city where nobody can hear you' scary or edgy.

It would be a shitty steam network that allowed steam to just leak.

Then every city with a steam network is shitty! They bleed them with steamstacks all over the place.

Apparently it's to regulate pressure.

Re: Steam Networks

#29
My favorite fact about steam distribution systems is that they can be used for cooling, using either a steam-powered compressor or using adsorption refrigeration.

At least the former seems to actually have been employed or at least studied as an option by ConEd in NYC: https://web.archive.org/web/20071008014254/http://www.coned....

Re: Steam Networks

#30
The article cites end-to-end efficiency as 60%. Plus the costs of maintaining steam generators and the pipe network.

Electrical transmission systems are roughly 85% efficient to the consumer; together with boring old resistive electric radiators which are 100% efficient. So is there any reason to subscribe to the steam system for new construction?

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